diff options
Diffstat (limited to 'gdb/sparc-tdep.c')
| -rw-r--r-- | gdb/sparc-tdep.c | 3953 |
1 files changed, 992 insertions, 2961 deletions
diff --git a/gdb/sparc-tdep.c b/gdb/sparc-tdep.c index d3b24186769..ed4888044f7 100644 --- a/gdb/sparc-tdep.c +++ b/gdb/sparc-tdep.c @@ -1,8 +1,6 @@ -/* Target-dependent code for the SPARC for GDB, the GNU debugger. +/* Target-dependent code for SPARC. - Copyright 1986, 1987, 1989, 1990, 1991, 1992, 1993, 1994, 1995, - 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, - Inc. + Copyright 2003, 2004 Free Software Foundation, Inc. This file is part of GDB. @@ -21,108 +19,61 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ -/* ??? Support for calling functions from gdb in sparc64 is unfinished. */ - #include "defs.h" #include "arch-utils.h" +#include "dis-asm.h" +#include "floatformat.h" #include "frame.h" +#include "frame-base.h" +#include "frame-unwind.h" +#include "gdbcore.h" +#include "gdbtypes.h" #include "inferior.h" +#include "symtab.h" +#include "objfiles.h" +#include "osabi.h" +#include "regcache.h" #include "target.h" #include "value.h" -#include "bfd.h" -#include "gdb_string.h" -#include "regcache.h" -#include "osabi.h" -#include "dis-asm.h" - -#include "sparc-tdep.h" -#ifdef USE_PROC_FS -#include <sys/procfs.h> -/* Prototypes for supply_gregset etc. */ -#include "gregset.h" -#endif - -#include "gdbcore.h" #include "gdb_assert.h" +#include "gdb_string.h" -#include "symfile.h" /* for 'entry_point_address' */ - -/* - * Some local macros that have multi-arch and non-multi-arch versions: - */ - -#define SPARC_HAS_FPU 1 -/* Number of bytes devoted to Floating Point registers: */ -#define FP_REGISTER_BYTES (gdbarch_tdep (current_gdbarch)->fp_register_bytes) -/* Highest numbered Floating Point register. */ -#define FP_MAX_REGNUM (gdbarch_tdep (current_gdbarch)->fp_max_regnum) -/* Size of a general (integer) register: */ -#define SPARC_INTREG_SIZE (gdbarch_tdep (current_gdbarch)->intreg_size) -/* Offset within the call dummy stack of the saved registers. */ -#define DUMMY_REG_SAVE_OFFSET (gdbarch_tdep (current_gdbarch)->reg_save_offset) - -struct gdbarch_tdep - { - int fp_register_bytes; - int y_regnum; - int fp_max_regnum; - int intreg_size; - int reg_save_offset; - int call_dummy_call_offset; - int print_insn_mach; - }; - -/* Now make GDB_TARGET_IS_SPARC64 a runtime test. */ -/* FIXME MVS: or try testing bfd_arch_info.arch and bfd_arch_info.mach ... - * define GDB_TARGET_IS_SPARC64 \ - * (TARGET_ARCHITECTURE->arch == bfd_arch_sparc && \ - * (TARGET_ARCHITECTURE->mach == bfd_mach_sparc_v9 || \ - * TARGET_ARCHITECTURE->mach == bfd_mach_sparc_v9a)) - */ - -/* We don't store all registers immediately when requested, since they - get sent over in large chunks anyway. Instead, we accumulate most - of the changes and send them over once. "deferred_stores" keeps - track of which sets of registers we have locally-changed copies of, - so we only need send the groups that have changed. */ - -int deferred_stores = 0; /* Accumulated stores we want to do eventually. */ - - -const unsigned char * -sparc_breakpoint_from_pc (CORE_ADDR *pc, int *len) -{ - static const char breakpoint[] = {0x91, 0xd0, 0x20, 0x01}; - (*len) = sizeof (breakpoint); - return breakpoint; -} - -/* Fetch a single instruction. Even on bi-endian machines - such as sparc86x, instructions are always big-endian. */ - -static unsigned long -fetch_instruction (CORE_ADDR pc) -{ - unsigned long retval; - int i; - unsigned char buf[4]; - - read_memory (pc, buf, sizeof (buf)); - - /* Start at the most significant end of the integer, and work towards - the least significant. */ - retval = 0; - for (i = 0; i < sizeof (buf); ++i) - retval = (retval << 8) | buf[i]; - return retval; -} - - -/* Branches with prediction are treated like their non-predicting cousins. */ -/* FIXME: What about floating point branches? */ +#include "sparc-tdep.h" -/* Macros to extract fields from sparc instructions. */ +struct regset; + +/* This file implements the The SPARC 32-bit ABI as defined by the + section "Low-Level System Information" of the SPARC Compliance + Definition (SCD) 2.4.1, which is the 32-bit System V psABI for + SPARC. The SCD lists changes with respect to the origional 32-bit + psABI as defined in the "System V ABI, SPARC Processor + Supplement". + + Note that if we talk about SunOS, we mean SunOS 4.x, which was + BSD-based, which is sometimes (retroactively?) referred to as + Solaris 1.x. If we talk about Solaris we mean Solaris 2.x and + above (Solaris 7, 8 and 9 are nothing but Solaris 2.7, 2.8 and 2.9 + suffering from severe version number inflation). Solaris 2.x is + also known as SunOS 5.x, since that's what uname(1) says. Solaris + 2.x is SVR4-based. */ + +/* Please use the sparc32_-prefix for 32-bit specific code, the + sparc64_-prefix for 64-bit specific code and the sparc_-prefix for + code that can handle both. The 64-bit specific code lives in + sparc64-tdep.c; don't add any here. */ + +/* The SPARC Floating-Point Quad-Precision format is similar to + big-endian IA-64 Quad-recision format. */ +#define floatformat_sparc_quad floatformat_ia64_quad_big + +/* The stack pointer is offset from the stack frame by a BIAS of 2047 + (0x7ff) for 64-bit code. BIAS is likely to be defined on SPARC + hosts, so undefine it first. */ +#undef BIAS +#define BIAS 2047 + +/* Macros to extract fields from SPARC instructions. */ #define X_OP(i) (((i) >> 30) & 0x3) #define X_RD(i) (((i) >> 25) & 0x1f) #define X_A(i) (((i) >> 29) & 1) @@ -130,3235 +81,1315 @@ fetch_instruction (CORE_ADDR pc) #define X_OP2(i) (((i) >> 22) & 0x7) #define X_IMM22(i) ((i) & 0x3fffff) #define X_OP3(i) (((i) >> 19) & 0x3f) -#define X_RS1(i) (((i) >> 14) & 0x1f) #define X_I(i) (((i) >> 13) & 1) -#define X_IMM13(i) ((i) & 0x1fff) /* Sign extension macros. */ -#define X_SIMM13(i) ((X_IMM13 (i) ^ 0x1000) - 0x1000) #define X_DISP22(i) ((X_IMM22 (i) ^ 0x200000) - 0x200000) -#define X_CC(i) (((i) >> 20) & 3) -#define X_P(i) (((i) >> 19) & 1) #define X_DISP19(i) ((((i) & 0x7ffff) ^ 0x40000) - 0x40000) -#define X_RCOND(i) (((i) >> 25) & 7) -#define X_DISP16(i) ((((((i) >> 6) && 0xc000) | ((i) & 0x3fff)) ^ 0x8000) - 0x8000) -#define X_FCN(i) (((i) >> 25) & 31) - -typedef enum -{ - Error, not_branch, bicc, bicca, ba, baa, ticc, ta, done_retry -} branch_type; - -/* Simulate single-step ptrace call for sun4. Code written by Gary - Beihl (beihl@mcc.com). */ - -/* npc4 and next_pc describe the situation at the time that the - step-breakpoint was set, not necessary the current value of DEPRECATED_NPC_REGNUM. */ -static CORE_ADDR next_pc, npc4, target; -static int brknpc4, brktrg; -typedef char binsn_quantum[BREAKPOINT_MAX]; -static binsn_quantum break_mem[3]; - -static branch_type isbranch (long, CORE_ADDR, CORE_ADDR *); - -/* single_step() is called just before we want to resume the inferior, - if we want to single-step it but there is no hardware or kernel single-step - support (as on all SPARCs). We find all the possible targets of the - coming instruction and breakpoint them. - single_step is also called just after the inferior stops. If we had - set up a simulated single-step, we undo our damage. */ +/* Fetch the instruction at PC. Instructions are always big-endian + even if the processor operates in little-endian mode. */ -void -sparc_software_single_step (enum target_signal ignore, /* pid, but we don't need it */ - int insert_breakpoints_p) +unsigned long +sparc_fetch_instruction (CORE_ADDR pc) { - branch_type br; - CORE_ADDR pc; - long pc_instruction; - - if (insert_breakpoints_p) - { - /* Always set breakpoint for NPC. */ - next_pc = read_register (DEPRECATED_NPC_REGNUM); - npc4 = next_pc + 4; /* branch not taken */ - - target_insert_breakpoint (next_pc, break_mem[0]); - /* printf_unfiltered ("set break at %x\n",next_pc); */ + unsigned char buf[4]; + unsigned long insn; + int i; - pc = read_register (PC_REGNUM); - pc_instruction = fetch_instruction (pc); - br = isbranch (pc_instruction, pc, &target); - brknpc4 = brktrg = 0; + /* If we can't read the instruction at PC, return zero. */ + if (target_read_memory (pc, buf, sizeof (buf))) + return 0; - if (br == bicca) - { - /* Conditional annulled branch will either end up at - npc (if taken) or at npc+4 (if not taken). - Trap npc+4. */ - brknpc4 = 1; - target_insert_breakpoint (npc4, break_mem[1]); - } - else if (br == baa && target != next_pc) - { - /* Unconditional annulled branch will always end up at - the target. */ - brktrg = 1; - target_insert_breakpoint (target, break_mem[2]); - } - else if (GDB_TARGET_IS_SPARC64 && br == done_retry) - { - brktrg = 1; - target_insert_breakpoint (target, break_mem[2]); - } - } - else - { - /* Remove breakpoints */ - target_remove_breakpoint (next_pc, break_mem[0]); + insn = 0; + for (i = 0; i < sizeof (buf); i++) + insn = (insn << 8) | buf[i]; + return insn; +} + +/* Return the contents if register REGNUM as an address. */ - if (brknpc4) - target_remove_breakpoint (npc4, break_mem[1]); +static CORE_ADDR +sparc_address_from_register (int regnum) +{ + ULONGEST addr; - if (brktrg) - target_remove_breakpoint (target, break_mem[2]); - } + regcache_cooked_read_unsigned (current_regcache, regnum, &addr); + return addr; } -struct frame_extra_info -{ - CORE_ADDR bottom; - int in_prologue; - int flat; - /* Following fields only relevant for flat frames. */ - CORE_ADDR pc_addr; - CORE_ADDR fp_addr; - /* Add this to ->frame to get the value of the stack pointer at the - time of the register saves. */ - int sp_offset; -}; -/* Call this for each newly created frame. For SPARC, we need to - calculate the bottom of the frame, and do some extra work if the - prologue has been generated via the -mflat option to GCC. In - particular, we need to know where the previous fp and the pc have - been stashed, since their exact position within the frame may vary. */ +/* The functions on this page are intended to be used to classify + function arguments. */ -void -sparc_init_extra_frame_info (int fromleaf, struct frame_info *fi) -{ - char *name; - CORE_ADDR prologue_start, prologue_end; - int insn; - - frame_extra_info_zalloc (fi, sizeof (struct frame_extra_info)); - frame_saved_regs_zalloc (fi); - - get_frame_extra_info (fi)->bottom = - (get_next_frame (fi) - ? (get_frame_base (fi) == get_frame_base (get_next_frame (fi)) - ? get_frame_extra_info (get_next_frame (fi))->bottom - : get_frame_base (get_next_frame (fi))) - : read_sp ()); - - /* If fi->next is NULL, then we already set ->frame by passing - deprecated_read_fp() to create_new_frame. */ - if (get_next_frame (fi)) - { - char buf[MAX_REGISTER_SIZE]; - - /* Compute ->frame as if not flat. If it is flat, we'll change - it later. */ - if (get_next_frame (get_next_frame (fi)) != NULL - && ((get_frame_type (get_next_frame (get_next_frame (fi))) == SIGTRAMP_FRAME) - || deprecated_frame_in_dummy (get_next_frame (get_next_frame (fi)))) - && frameless_look_for_prologue (get_next_frame (fi))) - { - /* A frameless function interrupted by a signal did not change - the frame pointer, fix up frame pointer accordingly. */ - deprecated_update_frame_base_hack (fi, get_frame_base (get_next_frame (fi))); - get_frame_extra_info (fi)->bottom = - get_frame_extra_info (get_next_frame (fi))->bottom; - } - else - { - /* Should we adjust for stack bias here? */ - ULONGEST tmp; - tmp = get_frame_register_unsigned (fi, DEPRECATED_FP_REGNUM); - deprecated_update_frame_base_hack (fi, tmp); - if (GDB_TARGET_IS_SPARC64 && (get_frame_base (fi) & 1)) - deprecated_update_frame_base_hack (fi, get_frame_base (fi) + 2047); - } - } +/* Check whether TYPE is "Integral or Pointer". */ - /* Decide whether this is a function with a ``flat register window'' - frame. For such functions, the frame pointer is actually in %i7. */ - get_frame_extra_info (fi)->flat = 0; - get_frame_extra_info (fi)->in_prologue = 0; - if (find_pc_partial_function (get_frame_pc (fi), &name, &prologue_start, &prologue_end)) - { - /* See if the function starts with an add (which will be of a - negative number if a flat frame) to the sp. FIXME: Does not - handle large frames which will need more than one instruction - to adjust the sp. */ - insn = fetch_instruction (prologue_start); - if (X_OP (insn) == 2 && X_RD (insn) == 14 && X_OP3 (insn) == 0 - && X_I (insn) && X_SIMM13 (insn) < 0) - { - int offset = X_SIMM13 (insn); - - /* Then look for a save of %i7 into the frame. */ - insn = fetch_instruction (prologue_start + 4); - if (X_OP (insn) == 3 - && X_RD (insn) == 31 - && X_OP3 (insn) == 4 - && X_RS1 (insn) == 14) - { - char buf[MAX_REGISTER_SIZE]; - - /* We definitely have a flat frame now. */ - get_frame_extra_info (fi)->flat = 1; - - get_frame_extra_info (fi)->sp_offset = offset; - - /* Overwrite the frame's address with the value in %i7. */ - { - ULONGEST tmp; - tmp = get_frame_register_unsigned (fi, I7_REGNUM); - deprecated_update_frame_base_hack (fi, tmp); - } - - if (GDB_TARGET_IS_SPARC64 && (get_frame_base (fi) & 1)) - deprecated_update_frame_base_hack (fi, get_frame_base (fi) + 2047); - - /* Record where the fp got saved. */ - get_frame_extra_info (fi)->fp_addr = - get_frame_base (fi) + get_frame_extra_info (fi)->sp_offset + X_SIMM13 (insn); - - /* Also try to collect where the pc got saved to. */ - get_frame_extra_info (fi)->pc_addr = 0; - insn = fetch_instruction (prologue_start + 12); - if (X_OP (insn) == 3 - && X_RD (insn) == 15 - && X_OP3 (insn) == 4 - && X_RS1 (insn) == 14) - get_frame_extra_info (fi)->pc_addr = - get_frame_base (fi) + get_frame_extra_info (fi)->sp_offset + X_SIMM13 (insn); - } - } - else - { - /* Check if the PC is in the function prologue before a SAVE - instruction has been executed yet. If so, set the frame - to the current value of the stack pointer and set - the in_prologue flag. */ - CORE_ADDR addr; - struct symtab_and_line sal; - - sal = find_pc_line (prologue_start, 0); - if (sal.line == 0) /* no line info, use PC */ - prologue_end = get_frame_pc (fi); - else if (sal.end < prologue_end) - prologue_end = sal.end; - if (get_frame_pc (fi) < prologue_end) - { - for (addr = prologue_start; addr < get_frame_pc (fi); addr += 4) - { - insn = read_memory_integer (addr, 4); - if (X_OP (insn) == 2 && X_OP3 (insn) == 0x3c) - break; /* SAVE seen, stop searching */ - } - if (addr >= get_frame_pc (fi)) - { - get_frame_extra_info (fi)->in_prologue = 1; - deprecated_update_frame_base_hack (fi, read_register (SP_REGNUM)); - } - } - } - } - if (get_next_frame (fi) && get_frame_base (fi) == 0) +static int +sparc_integral_or_pointer_p (const struct type *type) +{ + switch (TYPE_CODE (type)) { - /* Kludge to cause init_prev_frame_info to destroy the new frame. */ - deprecated_update_frame_base_hack (fi, get_frame_base (get_next_frame (fi))); - deprecated_update_frame_pc_hack (fi, get_frame_pc (get_next_frame (fi))); + case TYPE_CODE_INT: + case TYPE_CODE_BOOL: + case TYPE_CODE_CHAR: + case TYPE_CODE_ENUM: + case TYPE_CODE_RANGE: + { + /* We have byte, half-word, word and extended-word/doubleword + integral types. The doubleword is an extension to the + origional 32-bit ABI by the SCD 2.4.x. */ + int len = TYPE_LENGTH (type); + return (len == 1 || len == 2 || len == 4 || len == 8); + } + return 1; + case TYPE_CODE_PTR: + case TYPE_CODE_REF: + { + /* Allow either 32-bit or 64-bit pointers. */ + int len = TYPE_LENGTH (type); + return (len == 4 || len == 8); + } + return 1; + default: + break; } -} -CORE_ADDR -sparc_frame_chain (struct frame_info *frame) -{ - /* Value that will cause DEPRECATED_FRAME_CHAIN_VALID to not worry - about the chain value. If it really is zero, we detect it later - in sparc_init_prev_frame. - - Note: kevinb/2003-02-18: The constant 1 used to be returned here, - but, after some recent changes to legacy_frame_chain_valid(), - this value is no longer suitable for causing - legacy_frame_chain_valid() to "not worry about the chain value." - The constant ~0 (i.e, 0xfff...) causes the failing test in - legacy_frame_chain_valid() to succeed thus preserving the "not - worry" property. I had considered using something like - ``get_frame_base (frame) + 1''. However, I think a constant - value is better, because when debugging this problem, I knew that - something funny was going on as soon as I saw the constant 1 - being used as the frame chain elsewhere in GDB. */ - - return ~ (CORE_ADDR) 0; + return 0; } -/* Find the pc saved in frame FRAME. */ +/* Check whether TYPE is "Floating". */ -CORE_ADDR -sparc_frame_saved_pc (struct frame_info *frame) +static int +sparc_floating_p (const struct type *type) { - char buf[MAX_REGISTER_SIZE]; - CORE_ADDR addr; - - if ((get_frame_type (frame) == SIGTRAMP_FRAME)) + switch (TYPE_CODE (type)) { - /* This is the signal trampoline frame. - Get the saved PC from the sigcontext structure. */ - -#ifndef SIGCONTEXT_PC_OFFSET -#define SIGCONTEXT_PC_OFFSET 12 -#endif - - CORE_ADDR sigcontext_addr; - char *scbuf; - int saved_pc_offset = SIGCONTEXT_PC_OFFSET; - char *name = NULL; - - scbuf = alloca (TARGET_PTR_BIT / HOST_CHAR_BIT); - - /* Solaris2 ucbsigvechandler passes a pointer to a sigcontext - as the third parameter. The offset to the saved pc is 12. */ - find_pc_partial_function (get_frame_pc (frame), &name, - (CORE_ADDR *) NULL, (CORE_ADDR *) NULL); - if (name && DEPRECATED_STREQ (name, "ucbsigvechandler")) - saved_pc_offset = 12; - - /* The sigcontext address is contained in register O2. */ + case TYPE_CODE_FLT: { - ULONGEST tmp; - tmp = get_frame_register_unsigned (frame, O0_REGNUM + 2); - sigcontext_addr = tmp; + int len = TYPE_LENGTH (type); + return (len == 4 || len == 8 || len == 16); } - - /* Don't cause a memory_error when accessing sigcontext in case the - stack layout has changed or the stack is corrupt. */ - target_read_memory (sigcontext_addr + saved_pc_offset, - scbuf, sizeof (scbuf)); - return extract_unsigned_integer (scbuf, sizeof (scbuf)); - } - else if (get_frame_extra_info (frame)->in_prologue || - (get_next_frame (frame) != NULL && - ((get_frame_type (get_next_frame (frame)) == SIGTRAMP_FRAME) || - deprecated_frame_in_dummy (get_next_frame (frame))) && - frameless_look_for_prologue (frame))) - { - /* A frameless function interrupted by a signal did not save - the PC, it is still in %o7. */ - ULONGEST tmp; - tmp = get_frame_register_unsigned (frame, O7_REGNUM); - return PC_ADJUST (tmp); + default: + break; } - if (get_frame_extra_info (frame)->flat) - addr = get_frame_extra_info (frame)->pc_addr; - else - addr = get_frame_extra_info (frame)->bottom + FRAME_SAVED_I0 + - SPARC_INTREG_SIZE * (I7_REGNUM - I0_REGNUM); - if (addr == 0) - /* A flat frame leaf function might not save the PC anywhere, - just leave it in %o7. */ - return PC_ADJUST (read_register (O7_REGNUM)); - - read_memory (addr, buf, SPARC_INTREG_SIZE); - return PC_ADJUST (extract_unsigned_integer (buf, SPARC_INTREG_SIZE)); + return 0; } -/* Since an individual frame in the frame cache is defined by two - arguments (a frame pointer and a stack pointer), we need two - arguments to get info for an arbitrary stack frame. This routine - takes two arguments and makes the cached frames look as if these - two arguments defined a frame on the cache. This allows the rest - of info frame to extract the important arguments without - difficulty. */ +/* Check whether TYPE is "Structure or Union". */ -struct frame_info * -setup_arbitrary_frame (int argc, CORE_ADDR *argv) +static int +sparc_structure_or_union_p (const struct type *type) { - struct frame_info *frame; - - if (argc != 2) - error ("Sparc frame specifications require two arguments: fp and sp"); + switch (TYPE_CODE (type)) + { + case TYPE_CODE_STRUCT: + case TYPE_CODE_UNION: + return 1; + default: + break; + } - frame = create_new_frame (argv[0], 0); + return 0; +} - if (!frame) - internal_error (__FILE__, __LINE__, - "create_new_frame returned invalid frame"); +/* Register information. */ - get_frame_extra_info (frame)->bottom = argv[1]; - deprecated_update_frame_pc_hack (frame, DEPRECATED_FRAME_SAVED_PC (frame)); - return frame; -} +static const char *sparc32_register_names[] = +{ + "g0", "g1", "g2", "g3", "g4", "g5", "g6", "g7", + "o0", "o1", "o2", "o3", "o4", "o5", "sp", "o7", + "l0", "l1", "l2", "l3", "l4", "l5", "l6", "l7", + "i0", "i1", "i2", "i3", "i4", "i5", "fp", "i7", -/* Given a pc value, skip it forward past the function prologue by - disassembling instructions that appear to be a prologue. + "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", + "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", + "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23", + "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31", - If FRAMELESS_P is set, we are only testing to see if the function - is frameless. This allows a quicker answer. + "y", "psr", "wim", "tbr", "pc", "npc", "fsr", "csr" +}; - This routine should be more specific in its actions; making sure - that it uses the same register in the initial prologue section. */ +/* Total number of registers. */ +#define SPARC32_NUM_REGS ARRAY_SIZE (sparc32_register_names) -static CORE_ADDR examine_prologue (CORE_ADDR, int, struct frame_info *, - CORE_ADDR *); +/* We provide the aliases %d0..%d30 for the floating registers as + "psuedo" registers. */ -static CORE_ADDR -examine_prologue (CORE_ADDR start_pc, int frameless_p, struct frame_info *fi, - CORE_ADDR *saved_regs) +static const char *sparc32_pseudo_register_names[] = { - int insn; - int dest = -1; - CORE_ADDR pc = start_pc; - int is_flat = 0; - - insn = fetch_instruction (pc); + "d0", "d2", "d4", "d6", "d8", "d10", "d12", "d14", + "d16", "d18", "d20", "d22", "d24", "d26", "d28", "d30" +}; - /* Recognize the `sethi' insn and record its destination. */ - if (X_OP (insn) == 0 && X_OP2 (insn) == 4) - { - dest = X_RD (insn); - pc += 4; - insn = fetch_instruction (pc); - } +/* Total number of pseudo registers. */ +#define SPARC32_NUM_PSEUDO_REGS ARRAY_SIZE (sparc32_pseudo_register_names) - /* Recognize an add immediate value to register to either %g1 or - the destination register recorded above. Actually, this might - well recognize several different arithmetic operations. - It doesn't check that rs1 == rd because in theory "sub %g0, 5, %g1" - followed by "save %sp, %g1, %sp" is a valid prologue (Not that - I imagine any compiler really does that, however). */ - if (X_OP (insn) == 2 - && X_I (insn) - && (X_RD (insn) == 1 || X_RD (insn) == dest)) - { - pc += 4; - insn = fetch_instruction (pc); - } +/* Return the name of register REGNUM. */ - /* Recognize any SAVE insn. */ - if (X_OP (insn) == 2 && X_OP3 (insn) == 60) - { - pc += 4; - if (frameless_p) /* If the save is all we care about, */ - return pc; /* return before doing more work */ - insn = fetch_instruction (pc); - } - /* Recognize add to %sp. */ - else if (X_OP (insn) == 2 && X_RD (insn) == 14 && X_OP3 (insn) == 0) - { - pc += 4; - if (frameless_p) /* If the add is all we care about, */ - return pc; /* return before doing more work */ - is_flat = 1; - insn = fetch_instruction (pc); - /* Recognize store of frame pointer (i7). */ - if (X_OP (insn) == 3 - && X_RD (insn) == 31 - && X_OP3 (insn) == 4 - && X_RS1 (insn) == 14) - { - pc += 4; - insn = fetch_instruction (pc); - - /* Recognize sub %sp, <anything>, %i7. */ - if (X_OP (insn) == 2 - && X_OP3 (insn) == 4 - && X_RS1 (insn) == 14 - && X_RD (insn) == 31) - { - pc += 4; - insn = fetch_instruction (pc); - } - else - return pc; - } - else - return pc; - } - else - /* Without a save or add instruction, it's not a prologue. */ - return start_pc; +static const char * +sparc32_register_name (int regnum) +{ + if (regnum >= 0 && regnum < SPARC32_NUM_REGS) + return sparc32_register_names[regnum]; - while (1) - { - /* Recognize stores into the frame from the input registers. - This recognizes all non alternate stores of an input register, - into a location offset from the frame pointer between - +68 and +92. */ - - /* The above will fail for arguments that are promoted - (eg. shorts to ints or floats to doubles), because the compiler - will pass them in positive-offset frame space, but the prologue - will save them (after conversion) in negative frame space at an - unpredictable offset. Therefore I am going to remove the - restriction on the target-address of the save, on the theory - that any unbroken sequence of saves from input registers must - be part of the prologue. In un-optimized code (at least), I'm - fairly sure that the compiler would emit SOME other instruction - (eg. a move or add) before emitting another save that is actually - a part of the function body. - - Besides, the reserved stack space is different for SPARC64 anyway. - - MVS 4/23/2000 */ - - if (X_OP (insn) == 3 - && (X_OP3 (insn) & 0x3c) == 4 /* Store, non-alternate. */ - && (X_RD (insn) & 0x18) == 0x18 /* Input register. */ - && X_I (insn) /* Immediate mode. */ - && X_RS1 (insn) == 30) /* Off of frame pointer. */ - ; /* empty statement -- fall thru to end of loop */ - else if (GDB_TARGET_IS_SPARC64 - && X_OP (insn) == 3 - && (X_OP3 (insn) & 0x3c) == 12 /* store, extended (64-bit) */ - && (X_RD (insn) & 0x18) == 0x18 /* input register */ - && X_I (insn) /* immediate mode */ - && X_RS1 (insn) == 30) /* off of frame pointer */ - ; /* empty statement -- fall thru to end of loop */ - else if (X_OP (insn) == 3 - && (X_OP3 (insn) & 0x3c) == 36 /* store, floating-point */ - && X_I (insn) /* immediate mode */ - && X_RS1 (insn) == 30) /* off of frame pointer */ - ; /* empty statement -- fall thru to end of loop */ - else if (is_flat - && X_OP (insn) == 3 - && X_OP3 (insn) == 4 /* store? */ - && X_RS1 (insn) == 14) /* off of frame pointer */ - { - if (saved_regs && X_I (insn)) - saved_regs[X_RD (insn)] = - get_frame_base (fi) + get_frame_extra_info (fi)->sp_offset + X_SIMM13 (insn); - } - else - break; - pc += 4; - insn = fetch_instruction (pc); - } + if (regnum < SPARC32_NUM_REGS + SPARC32_NUM_PSEUDO_REGS) + return sparc32_pseudo_register_names[regnum - SPARC32_NUM_REGS]; - return pc; + return NULL; } -/* Advance PC across any function entry prologue instructions to reach - some "real" code. */ +/* Return the GDB type object for the "standard" data type of data in + register REGNUM. */ -CORE_ADDR -sparc_skip_prologue (CORE_ADDR start_pc) +static struct type * +sparc32_register_type (struct gdbarch *gdbarch, int regnum) { - struct symtab_and_line sal; - CORE_ADDR func_start, func_end; - - /* This is the preferred method, find the end of the prologue by - using the debugging information. */ - if (find_pc_partial_function (start_pc, NULL, &func_start, &func_end)) - { - sal = find_pc_line (func_start, 0); + if (regnum >= SPARC_F0_REGNUM && regnum <= SPARC_F31_REGNUM) + return builtin_type_float; - if (sal.end < func_end - && start_pc <= sal.end) - return sal.end; - } + if (regnum >= SPARC32_D0_REGNUM && regnum <= SPARC32_D30_REGNUM) + return builtin_type_double; - /* Oh well, examine the code by hand. */ - return examine_prologue (start_pc, 0, NULL, NULL); -} + if (regnum == SPARC_SP_REGNUM || regnum == SPARC_FP_REGNUM) + return builtin_type_void_data_ptr; -/* Is the prologue at IP frameless? */ + if (regnum == SPARC32_PC_REGNUM || regnum == SPARC32_NPC_REGNUM) + return builtin_type_void_func_ptr; -int -sparc_prologue_frameless_p (CORE_ADDR ip) -{ - return ip == examine_prologue (ip, 1, NULL, NULL); + return builtin_type_int32; } -/* Check instruction at ADDR to see if it is a branch. - All non-annulled instructions will go to NPC or will trap. - Set *TARGET if we find a candidate branch; set to zero if not. +static void +sparc32_pseudo_register_read (struct gdbarch *gdbarch, + struct regcache *regcache, + int regnum, void *buf) +{ + gdb_assert (regnum >= SPARC32_D0_REGNUM && regnum <= SPARC32_D30_REGNUM); - This isn't static as it's used by remote-sa.sparc.c. */ + regnum = SPARC_F0_REGNUM + 2 * (regnum - SPARC32_D0_REGNUM); + regcache_raw_read (regcache, regnum, buf); + regcache_raw_read (regcache, regnum + 1, ((char *)buf) + 4); +} -static branch_type -isbranch (long instruction, CORE_ADDR addr, CORE_ADDR *target) +static void +sparc32_pseudo_register_write (struct gdbarch *gdbarch, + struct regcache *regcache, + int regnum, const void *buf) { - branch_type val = not_branch; - long int offset = 0; /* Must be signed for sign-extend. */ - - *target = 0; - - if (X_OP (instruction) == 0 - && (X_OP2 (instruction) == 2 - || X_OP2 (instruction) == 6 - || X_OP2 (instruction) == 1 - || X_OP2 (instruction) == 3 - || X_OP2 (instruction) == 5 - || (GDB_TARGET_IS_SPARC64 && X_OP2 (instruction) == 7))) - { - if (X_COND (instruction) == 8) - val = X_A (instruction) ? baa : ba; - else - val = X_A (instruction) ? bicca : bicc; - switch (X_OP2 (instruction)) - { - case 7: - if (!GDB_TARGET_IS_SPARC64) - break; - /* else fall thru */ - case 2: - case 6: - offset = 4 * X_DISP22 (instruction); - break; - case 1: - case 5: - offset = 4 * X_DISP19 (instruction); - break; - case 3: - offset = 4 * X_DISP16 (instruction); - break; - } - *target = addr + offset; - } - else if (GDB_TARGET_IS_SPARC64 - && X_OP (instruction) == 2 - && X_OP3 (instruction) == 62) - { - if (X_FCN (instruction) == 0) - { - /* done */ - *target = read_register (TNPC_REGNUM); - val = done_retry; - } - else if (X_FCN (instruction) == 1) - { - /* retry */ - *target = read_register (TPC_REGNUM); - val = done_retry; - } - } + gdb_assert (regnum >= SPARC32_D0_REGNUM && regnum <= SPARC32_D30_REGNUM); - return val; + regnum = SPARC_F0_REGNUM + 2 * (regnum - SPARC32_D0_REGNUM); + regcache_raw_write (regcache, regnum, buf); + regcache_raw_write (regcache, regnum + 1, ((const char *)buf) + 4); } -/* Find register number REGNUM relative to FRAME and put its - (raw) contents in *RAW_BUFFER. Set *OPTIMIZED if the variable - was optimized out (and thus can't be fetched). If the variable - was fetched from memory, set *ADDRP to where it was fetched from, - otherwise it was fetched from a register. - The argument RAW_BUFFER must point to aligned memory. */ - -void -sparc_get_saved_register (char *raw_buffer, int *optimized, CORE_ADDR *addrp, - struct frame_info *frame, int regnum, - enum lval_type *lval) +static CORE_ADDR +sparc32_push_dummy_code (struct gdbarch *gdbarch, CORE_ADDR sp, + CORE_ADDR funcaddr, int using_gcc, + struct value **args, int nargs, + struct type *value_type, + CORE_ADDR *real_pc, CORE_ADDR *bp_addr) { - struct frame_info *frame1; - CORE_ADDR addr; - - if (!target_has_registers) - error ("No registers."); + *bp_addr = sp - 4; + *real_pc = funcaddr; - if (optimized) - *optimized = 0; - - addr = 0; - - /* FIXME This code extracted from infcmd.c; should put elsewhere! */ - if (frame == NULL) + if (using_struct_return (value_type, using_gcc)) { - /* error ("No selected frame."); */ - if (!target_has_registers) - error ("The program has no registers now."); - if (deprecated_selected_frame == NULL) - error ("No selected frame."); - /* Try to use selected frame */ - frame = get_prev_frame (deprecated_selected_frame); - if (frame == 0) - error ("Cmd not meaningful in the outermost frame."); - } + char buf[4]; + /* This is an UNIMP instruction. */ + store_unsigned_integer (buf, 4, TYPE_LENGTH (value_type) & 0x1fff); + write_memory (sp - 8, buf, 4); + return sp - 8; + } - frame1 = get_next_frame (frame); + return sp - 4; +} - /* Get saved PC from the frame info if not in innermost frame. */ - if (regnum == PC_REGNUM && frame1 != NULL) - { - if (lval != NULL) - *lval = not_lval; - if (raw_buffer != NULL) - { - /* Put it back in target format. */ - store_unsigned_integer (raw_buffer, DEPRECATED_REGISTER_RAW_SIZE (regnum), get_frame_pc (frame)); - } - if (addrp != NULL) - *addrp = 0; - return; - } +static CORE_ADDR +sparc32_store_arguments (struct regcache *regcache, int nargs, + struct value **args, CORE_ADDR sp, + int struct_return, CORE_ADDR struct_addr) +{ + /* Number of words in the "parameter array". */ + int num_elements = 0; + int element = 0; + int i; - while (frame1 != NULL) + for (i = 0; i < nargs; i++) { - /* FIXME MVS: wrong test for dummy frame at entry. */ + struct type *type = VALUE_TYPE (args[i]); + int len = TYPE_LENGTH (type); - if (get_frame_pc (frame1) >= (get_frame_extra_info (frame1)->bottom - ? get_frame_extra_info (frame1)->bottom - : read_sp ()) - && get_frame_pc (frame1) <= get_frame_base (frame1)) - { - /* Dummy frame. All but the window regs are in there somewhere. - The window registers are saved on the stack, just like in a - normal frame. */ - if (regnum >= G1_REGNUM && regnum < G1_REGNUM + 7) - addr = get_frame_base (frame1) + (regnum - G0_REGNUM) * SPARC_INTREG_SIZE - - (FP_REGISTER_BYTES + 8 * SPARC_INTREG_SIZE); - else if (regnum >= I0_REGNUM && regnum < I0_REGNUM + 8) - /* NOTE: cagney/2002-05-04: The call to get_prev_frame() - is safe/cheap - there will always be a prev frame. - This is because frame1 is initialized to frame->next - (frame1->prev == frame) and is then advanced towards - the innermost (next) frame. */ - addr = (get_frame_extra_info (get_prev_frame (frame1))->bottom - + (regnum - I0_REGNUM) * SPARC_INTREG_SIZE - + FRAME_SAVED_I0); - else if (regnum >= L0_REGNUM && regnum < L0_REGNUM + 8) - /* NOTE: cagney/2002-05-04: The call to get_prev_frame() - is safe/cheap - there will always be a prev frame. - This is because frame1 is initialized to frame->next - (frame1->prev == frame) and is then advanced towards - the innermost (next) frame. */ - addr = (get_frame_extra_info (get_prev_frame (frame1))->bottom - + (regnum - L0_REGNUM) * SPARC_INTREG_SIZE - + FRAME_SAVED_L0); - else if (regnum >= O0_REGNUM && regnum < O0_REGNUM + 8) - addr = get_frame_base (frame1) + (regnum - O0_REGNUM) * SPARC_INTREG_SIZE - - (FP_REGISTER_BYTES + 16 * SPARC_INTREG_SIZE); - else if (SPARC_HAS_FPU && - regnum >= FP0_REGNUM && regnum < FP0_REGNUM + 32) - addr = get_frame_base (frame1) + (regnum - FP0_REGNUM) * 4 - - (FP_REGISTER_BYTES); - else if (GDB_TARGET_IS_SPARC64 && SPARC_HAS_FPU && - regnum >= FP0_REGNUM + 32 && regnum < FP_MAX_REGNUM) - addr = get_frame_base (frame1) + 32 * 4 + (regnum - FP0_REGNUM - 32) * 8 - - (FP_REGISTER_BYTES); - else if (regnum >= Y_REGNUM && regnum < NUM_REGS) - addr = get_frame_base (frame1) + (regnum - Y_REGNUM) * SPARC_INTREG_SIZE - - (FP_REGISTER_BYTES + 24 * SPARC_INTREG_SIZE); - } - else if (get_frame_extra_info (frame1)->flat) + if (sparc_structure_or_union_p (type) + || (sparc_floating_p (type) && len == 16)) { + /* Structure, Union and Quad-Precision Arguments. */ + sp -= len; - if (regnum == RP_REGNUM) - addr = get_frame_extra_info (frame1)->pc_addr; - else if (regnum == I7_REGNUM) - addr = get_frame_extra_info (frame1)->fp_addr; - else - { - CORE_ADDR func_start; - CORE_ADDR *regs; - - regs = alloca (NUM_REGS * sizeof (CORE_ADDR)); - memset (regs, 0, NUM_REGS * sizeof (CORE_ADDR)); + /* Use doubleword alignment for these values. That's always + correct, and wasting a few bytes shouldn't be a problem. */ + sp &= ~0x7; - find_pc_partial_function (get_frame_pc (frame1), NULL, &func_start, NULL); - examine_prologue (func_start, 0, frame1, regs); - addr = regs[regnum]; - } + write_memory (sp, VALUE_CONTENTS (args[i]), len); + args[i] = value_from_pointer (lookup_pointer_type (type), sp); + num_elements++; } - else + else if (sparc_floating_p (type)) { - /* Normal frame. Local and In registers are saved on stack. */ - if (regnum >= I0_REGNUM && regnum < I0_REGNUM + 8) - addr = (get_frame_extra_info (get_prev_frame (frame1))->bottom - + (regnum - I0_REGNUM) * SPARC_INTREG_SIZE - + FRAME_SAVED_I0); - else if (regnum >= L0_REGNUM && regnum < L0_REGNUM + 8) - addr = (get_frame_extra_info (get_prev_frame (frame1))->bottom - + (regnum - L0_REGNUM) * SPARC_INTREG_SIZE - + FRAME_SAVED_L0); - else if (regnum >= O0_REGNUM && regnum < O0_REGNUM + 8) - { - /* Outs become ins. */ - int realnum; - frame_register (frame1, (regnum - O0_REGNUM + I0_REGNUM), - optimized, lval, addrp, &realnum, raw_buffer); - return; - } + /* Floating arguments. */ + gdb_assert (len == 4 || len == 8); + num_elements += (len / 4); } - if (addr != 0) - break; - frame1 = get_next_frame (frame1); - } - if (addr != 0) - { - if (lval != NULL) - *lval = lval_memory; - if (regnum == SP_REGNUM) + else { - if (raw_buffer != NULL) - { - /* Put it back in target format. */ - store_unsigned_integer (raw_buffer, DEPRECATED_REGISTER_RAW_SIZE (regnum), addr); - } - if (addrp != NULL) - *addrp = 0; - return; + /* Integral and pointer arguments. */ + gdb_assert (sparc_integral_or_pointer_p (type)); + + if (len < 4) + args[i] = value_cast (builtin_type_int32, args[i]); + num_elements += ((len + 3) / 4); } - if (raw_buffer != NULL) - read_memory (addr, raw_buffer, DEPRECATED_REGISTER_RAW_SIZE (regnum)); - } - else - { - if (lval != NULL) - *lval = lval_register; - addr = DEPRECATED_REGISTER_BYTE (regnum); - if (raw_buffer != NULL) - deprecated_read_register_gen (regnum, raw_buffer); } - if (addrp != NULL) - *addrp = addr; -} - -/* Push an empty stack frame, and record in it the current PC, regs, etc. - We save the non-windowed registers and the ins. The locals and outs - are new; they don't need to be saved. The i's and l's of - the last frame were already saved on the stack. */ + /* Always allocate at least six words. */ + sp -= max (6, num_elements) * 4; -/* Definitely see tm-sparc.h for more doc of the frame format here. */ - -/* See tm-sparc.h for how this is calculated. */ - -#define DUMMY_STACK_REG_BUF_SIZE \ - (((8+8+8) * SPARC_INTREG_SIZE) + FP_REGISTER_BYTES) -#define DUMMY_STACK_SIZE \ - (DUMMY_STACK_REG_BUF_SIZE + DUMMY_REG_SAVE_OFFSET) - -void -sparc_push_dummy_frame (void) -{ - CORE_ADDR sp, old_sp; - char *register_temp; - - register_temp = alloca (DUMMY_STACK_SIZE); + /* The psABI says that "Software convention requires space for the + struct/union return value pointer, even if the word is unused." */ + sp -= 4; - old_sp = sp = read_sp (); + /* The psABI says that "Although software convention and the + operating system require every stack frame to be doubleword + aligned." */ + sp &= ~0x7; - if (GDB_TARGET_IS_SPARC64) - { - /* PC, NPC, CCR, FSR, FPRS, Y, ASI */ - deprecated_read_register_bytes (DEPRECATED_REGISTER_BYTE (PC_REGNUM), - ®ister_temp[0], - DEPRECATED_REGISTER_RAW_SIZE (PC_REGNUM) * 7); - deprecated_read_register_bytes (DEPRECATED_REGISTER_BYTE (PSTATE_REGNUM), - ®ister_temp[7 * SPARC_INTREG_SIZE], - DEPRECATED_REGISTER_RAW_SIZE (PSTATE_REGNUM)); - /* FIXME: not sure what needs to be saved here. */ - } - else + for (i = 0; i < nargs; i++) { - /* Y, PS, WIM, TBR, PC, NPC, FPS, CPS regs */ - deprecated_read_register_bytes (DEPRECATED_REGISTER_BYTE (Y_REGNUM), - ®ister_temp[0], - DEPRECATED_REGISTER_RAW_SIZE (Y_REGNUM) * 8); - } - - deprecated_read_register_bytes (DEPRECATED_REGISTER_BYTE (O0_REGNUM), - ®ister_temp[8 * SPARC_INTREG_SIZE], - SPARC_INTREG_SIZE * 8); + char *valbuf = VALUE_CONTENTS (args[i]); + struct type *type = VALUE_TYPE (args[i]); + int len = TYPE_LENGTH (type); - deprecated_read_register_bytes (DEPRECATED_REGISTER_BYTE (G0_REGNUM), - ®ister_temp[16 * SPARC_INTREG_SIZE], - SPARC_INTREG_SIZE * 8); + gdb_assert (len == 4 || len == 8); - if (SPARC_HAS_FPU) - deprecated_read_register_bytes (DEPRECATED_REGISTER_BYTE (FP0_REGNUM), - ®ister_temp[24 * SPARC_INTREG_SIZE], - FP_REGISTER_BYTES); + if (element < 6) + { + int regnum = SPARC_O0_REGNUM + element; - sp -= DUMMY_STACK_SIZE; + regcache_cooked_write (regcache, regnum, valbuf); + if (len > 4 && element < 5) + regcache_cooked_write (regcache, regnum + 1, valbuf + 4); + } - DEPRECATED_DUMMY_WRITE_SP (sp); + /* Always store the argument in memory. */ + write_memory (sp + 4 + element * 4, valbuf, len); + element += len / 4; + } - write_memory (sp + DUMMY_REG_SAVE_OFFSET, ®ister_temp[0], - DUMMY_STACK_REG_BUF_SIZE); + gdb_assert (element == num_elements); - if (strcmp (target_shortname, "sim") != 0) - { - /* NOTE: cagney/2002-04-04: The code below originally contained - GDB's _only_ call to write_fp(). That call was eliminated by - inlining the corresponding code. For the 64 bit case, the - old function (sparc64_write_fp) did the below although I'm - not clear why. The same goes for why this is only done when - the underlying target is a simulator. */ - if (GDB_TARGET_IS_SPARC64) - { - /* Target is a 64 bit SPARC. */ - CORE_ADDR oldfp = read_register (DEPRECATED_FP_REGNUM); - if (oldfp & 1) - write_register (DEPRECATED_FP_REGNUM, old_sp - 2047); - else - write_register (DEPRECATED_FP_REGNUM, old_sp); - } - else - { - /* Target is a 32 bit SPARC. */ - write_register (DEPRECATED_FP_REGNUM, old_sp); - } - /* Set return address register for the call dummy to the current PC. */ - write_register (I7_REGNUM, read_pc () - 8); - } - else + if (struct_return) { - /* The call dummy will write this value to FP before executing - the 'save'. This ensures that register window flushes work - correctly in the simulator. */ - write_register (G0_REGNUM + 1, read_register (DEPRECATED_FP_REGNUM)); - - /* The call dummy will write this value to FP after executing - the 'save'. */ - write_register (G0_REGNUM + 2, old_sp); - - /* The call dummy will write this value to the return address (%i7) after - executing the 'save'. */ - write_register (G0_REGNUM + 3, read_pc () - 8); - - /* Set the FP that the call dummy will be using after the 'save'. - This makes backtraces from an inferior function call work properly. */ - write_register (DEPRECATED_FP_REGNUM, old_sp); + char buf[4]; + + store_unsigned_integer (buf, 4, struct_addr); + write_memory (sp, buf, 4); } -} -/* sparc_frame_find_saved_regs (). This function is here only because - pop_frame uses it. Note there is an interesting corner case which - I think few ports of GDB get right--if you are popping a frame - which does not save some register that *is* saved by a more inner - frame (such a frame will never be a dummy frame because dummy - frames save all registers). + return sp; +} - NOTE: cagney/2003-03-12: Since pop_frame has been rewritten to use - frame_unwind_register() the need for this function is questionable. +static CORE_ADDR +sparc32_push_dummy_call (struct gdbarch *gdbarch, CORE_ADDR func_addr, + struct regcache *regcache, CORE_ADDR bp_addr, + int nargs, struct value **args, CORE_ADDR sp, + int struct_return, CORE_ADDR struct_addr) +{ + CORE_ADDR call_pc = (struct_return ? (bp_addr - 12) : (bp_addr - 8)); - Stores, into an array of CORE_ADDR, - the addresses of the saved registers of frame described by FRAME_INFO. - This includes special registers such as pc and fp saved in special - ways in the stack frame. sp is even more special: - the address we return for it IS the sp for the next frame. + /* Set return address. */ + regcache_cooked_write_unsigned (regcache, SPARC_O7_REGNUM, call_pc); - Note that on register window machines, we are currently making the - assumption that window registers are being saved somewhere in the - frame in which they are being used. If they are stored in an - inferior frame, find_saved_register will break. + /* Set up function arguments. */ + sp = sparc32_store_arguments (regcache, nargs, args, sp, + struct_return, struct_addr); - On the Sun 4, the only time all registers are saved is when - a dummy frame is involved. Otherwise, the only saved registers - are the LOCAL and IN registers which are saved as a result - of the "save/restore" opcodes. This condition is determined - by address rather than by value. + /* Allocate the 16-word window save area. */ + sp -= 16 * 4; - The "pc" is not stored in a frame on the SPARC. (What is stored - is a return address minus 8.) sparc_pop_frame knows how to - deal with that. Other routines might or might not. + /* Stack should be doubleword aligned at this point. */ + gdb_assert (sp % 8 == 0); - See tm-sparc.h (PUSH_DUMMY_FRAME and friends) for CRITICAL information - about how this works. */ + /* Finally, update the stack pointer. */ + regcache_cooked_write_unsigned (regcache, SPARC_SP_REGNUM, sp); -static void sparc_frame_find_saved_regs (struct frame_info *, CORE_ADDR *); + return sp; +} + -static void -sparc_frame_find_saved_regs (struct frame_info *fi, CORE_ADDR *saved_regs_addr) +/* Use the program counter to determine the contents and size of a + breakpoint instruction. Return a pointer to a string of bytes that + encode a breakpoint instruction, store the length of the string in + *LEN and optionally adjust *PC to point to the correct memory + location for inserting the breakpoint. */ + +static const unsigned char * +sparc_breakpoint_from_pc (CORE_ADDR *pc, int *len) { - int regnum; - CORE_ADDR frame_addr = get_frame_base (fi); - - gdb_assert (fi != NULL); + static unsigned char break_insn[] = { 0x91, 0xd0, 0x20, 0x01 }; - memset (saved_regs_addr, 0, NUM_REGS * sizeof (CORE_ADDR)); - - if (get_frame_pc (fi) >= (get_frame_extra_info (fi)->bottom - ? get_frame_extra_info (fi)->bottom - : read_sp ()) - && get_frame_pc (fi) <= get_frame_base (fi)) - { - /* Dummy frame. All but the window regs are in there somewhere. */ - for (regnum = G1_REGNUM; regnum < G1_REGNUM + 7; regnum++) - saved_regs_addr[regnum] = - frame_addr + (regnum - G0_REGNUM) * SPARC_INTREG_SIZE - - DUMMY_STACK_REG_BUF_SIZE + 16 * SPARC_INTREG_SIZE; - - for (regnum = I0_REGNUM; regnum < I0_REGNUM + 8; regnum++) - saved_regs_addr[regnum] = - frame_addr + (regnum - I0_REGNUM) * SPARC_INTREG_SIZE - - DUMMY_STACK_REG_BUF_SIZE + 8 * SPARC_INTREG_SIZE; - - if (SPARC_HAS_FPU) - for (regnum = FP0_REGNUM; regnum < FP_MAX_REGNUM; regnum++) - saved_regs_addr[regnum] = frame_addr + (regnum - FP0_REGNUM) * 4 - - DUMMY_STACK_REG_BUF_SIZE + 24 * SPARC_INTREG_SIZE; - - if (GDB_TARGET_IS_SPARC64) - { - for (regnum = PC_REGNUM; regnum < PC_REGNUM + 7; regnum++) - { - saved_regs_addr[regnum] = - frame_addr + (regnum - PC_REGNUM) * SPARC_INTREG_SIZE - - DUMMY_STACK_REG_BUF_SIZE; - } - saved_regs_addr[PSTATE_REGNUM] = - frame_addr + 8 * SPARC_INTREG_SIZE - DUMMY_STACK_REG_BUF_SIZE; - } - else - for (regnum = Y_REGNUM; regnum < NUM_REGS; regnum++) - saved_regs_addr[regnum] = - frame_addr + (regnum - Y_REGNUM) * SPARC_INTREG_SIZE - - DUMMY_STACK_REG_BUF_SIZE; - - frame_addr = (get_frame_extra_info (fi)->bottom - ? get_frame_extra_info (fi)->bottom - : read_sp ()); - } - else if (get_frame_extra_info (fi)->flat) - { - CORE_ADDR func_start; - find_pc_partial_function (get_frame_pc (fi), NULL, &func_start, NULL); - examine_prologue (func_start, 0, fi, saved_regs_addr); - - /* Flat register window frame. */ - saved_regs_addr[RP_REGNUM] = get_frame_extra_info (fi)->pc_addr; - saved_regs_addr[I7_REGNUM] = get_frame_extra_info (fi)->fp_addr; - } - else - { - /* Normal frame. Just Local and In registers */ - frame_addr = (get_frame_extra_info (fi)->bottom - ? get_frame_extra_info (fi)->bottom - : read_sp ()); - for (regnum = L0_REGNUM; regnum < L0_REGNUM + 8; regnum++) - saved_regs_addr[regnum] = - (frame_addr + (regnum - L0_REGNUM) * SPARC_INTREG_SIZE - + FRAME_SAVED_L0); - for (regnum = I0_REGNUM; regnum < I0_REGNUM + 8; regnum++) - saved_regs_addr[regnum] = - (frame_addr + (regnum - I0_REGNUM) * SPARC_INTREG_SIZE - + FRAME_SAVED_I0); - } - if (get_next_frame (fi)) - { - if (get_frame_extra_info (fi)->flat) - { - saved_regs_addr[O7_REGNUM] = get_frame_extra_info (fi)->pc_addr; - } - else - { - /* Pull off either the next frame pointer or the stack pointer */ - CORE_ADDR next_next_frame_addr = - (get_frame_extra_info (get_next_frame (fi))->bottom - ? get_frame_extra_info (get_next_frame (fi))->bottom - : read_sp ()); - for (regnum = O0_REGNUM; regnum < O0_REGNUM + 8; regnum++) - saved_regs_addr[regnum] = - (next_next_frame_addr - + (regnum - O0_REGNUM) * SPARC_INTREG_SIZE - + FRAME_SAVED_I0); - } - } - /* Otherwise, whatever we would get from ptrace(GETREGS) is accurate */ - /* FIXME -- should this adjust for the sparc64 offset? */ - saved_regs_addr[SP_REGNUM] = get_frame_base (fi); + *len = sizeof (break_insn); + return break_insn; } + -/* Discard from the stack the innermost frame, restoring all saved registers. - - Note that the values stored in fsr by - deprecated_get_frame_saved_regs are *in the context of the called - frame*. What this means is that the i regs of fsr must be restored - into the o regs of the (calling) frame that we pop into. We don't - care about the output regs of the calling frame, since unless it's - a dummy frame, it won't have any output regs in it. - - We never have to bother with %l (local) regs, since the called routine's - locals get tossed, and the calling routine's locals are already saved - on its stack. */ - -/* Definitely see tm-sparc.h for more doc of the frame format here. */ +/* Allocate and initialize a frame cache. */ -void -sparc_pop_frame (void) +static struct sparc_frame_cache * +sparc_alloc_frame_cache (void) { - struct frame_info *frame = get_current_frame (); - CORE_ADDR pc; - CORE_ADDR *fsr; - char *raw_buffer; - int regnum; - - fsr = alloca (NUM_REGS * sizeof (CORE_ADDR)); - raw_buffer = alloca (DEPRECATED_REGISTER_BYTES); - sparc_frame_find_saved_regs (frame, &fsr[0]); - if (SPARC_HAS_FPU) - { - if (fsr[FP0_REGNUM]) - { - read_memory (fsr[FP0_REGNUM], raw_buffer, FP_REGISTER_BYTES); - deprecated_write_register_bytes (DEPRECATED_REGISTER_BYTE (FP0_REGNUM), - raw_buffer, FP_REGISTER_BYTES); - } - if (!(GDB_TARGET_IS_SPARC64)) - { - if (fsr[FPS_REGNUM]) - { - read_memory (fsr[FPS_REGNUM], raw_buffer, SPARC_INTREG_SIZE); - deprecated_write_register_gen (FPS_REGNUM, raw_buffer); - } - if (fsr[CPS_REGNUM]) - { - read_memory (fsr[CPS_REGNUM], raw_buffer, SPARC_INTREG_SIZE); - deprecated_write_register_gen (CPS_REGNUM, raw_buffer); - } - } - } - if (fsr[G1_REGNUM]) - { - read_memory (fsr[G1_REGNUM], raw_buffer, 7 * SPARC_INTREG_SIZE); - deprecated_write_register_bytes (DEPRECATED_REGISTER_BYTE (G1_REGNUM), raw_buffer, - 7 * SPARC_INTREG_SIZE); - } - - if (get_frame_extra_info (frame)->flat) - { - /* Each register might or might not have been saved, need to test - individually. */ - for (regnum = L0_REGNUM; regnum < L0_REGNUM + 8; ++regnum) - if (fsr[regnum]) - write_register (regnum, read_memory_integer (fsr[regnum], - SPARC_INTREG_SIZE)); - for (regnum = I0_REGNUM; regnum < I0_REGNUM + 8; ++regnum) - if (fsr[regnum]) - write_register (regnum, read_memory_integer (fsr[regnum], - SPARC_INTREG_SIZE)); - - /* Handle all outs except stack pointer (o0-o5; o7). */ - for (regnum = O0_REGNUM; regnum < O0_REGNUM + 6; ++regnum) - if (fsr[regnum]) - write_register (regnum, read_memory_integer (fsr[regnum], - SPARC_INTREG_SIZE)); - if (fsr[O0_REGNUM + 7]) - write_register (O0_REGNUM + 7, - read_memory_integer (fsr[O0_REGNUM + 7], - SPARC_INTREG_SIZE)); - - DEPRECATED_DUMMY_WRITE_SP (get_frame_base (frame)); - } - else if (fsr[I0_REGNUM]) - { - CORE_ADDR sp; - - char *reg_temp; - - reg_temp = alloca (SPARC_INTREG_SIZE * 16); - - read_memory (fsr[I0_REGNUM], raw_buffer, 8 * SPARC_INTREG_SIZE); - - /* Get the ins and locals which we are about to restore. Just - moving the stack pointer is all that is really needed, except - store_inferior_registers is then going to write the ins and - locals from the registers array, so we need to muck with the - registers array. */ - sp = fsr[SP_REGNUM]; - - if (GDB_TARGET_IS_SPARC64 && (sp & 1)) - sp += 2047; + struct sparc_frame_cache *cache; + int i; - read_memory (sp, reg_temp, SPARC_INTREG_SIZE * 16); + cache = FRAME_OBSTACK_ZALLOC (struct sparc_frame_cache); - /* Restore the out registers. - Among other things this writes the new stack pointer. */ - deprecated_write_register_bytes (DEPRECATED_REGISTER_BYTE (O0_REGNUM), raw_buffer, - SPARC_INTREG_SIZE * 8); + /* Base address. */ + cache->base = 0; + cache->pc = 0; - deprecated_write_register_bytes (DEPRECATED_REGISTER_BYTE (L0_REGNUM), reg_temp, - SPARC_INTREG_SIZE * 16); - } + /* Frameless until proven otherwise. */ + cache->frameless_p = 1; - if (!(GDB_TARGET_IS_SPARC64)) - if (fsr[PS_REGNUM]) - write_register (PS_REGNUM, - read_memory_integer (fsr[PS_REGNUM], - DEPRECATED_REGISTER_RAW_SIZE (PS_REGNUM))); - - if (fsr[Y_REGNUM]) - write_register (Y_REGNUM, - read_memory_integer (fsr[Y_REGNUM], - DEPRECATED_REGISTER_RAW_SIZE (Y_REGNUM))); - if (fsr[PC_REGNUM]) - { - /* Explicitly specified PC (and maybe NPC) -- just restore them. */ - write_register (PC_REGNUM, - read_memory_integer (fsr[PC_REGNUM], - DEPRECATED_REGISTER_RAW_SIZE (PC_REGNUM))); - if (fsr[DEPRECATED_NPC_REGNUM]) - write_register (DEPRECATED_NPC_REGNUM, - read_memory_integer (fsr[DEPRECATED_NPC_REGNUM], - DEPRECATED_REGISTER_RAW_SIZE (DEPRECATED_NPC_REGNUM))); - } - else if (get_frame_extra_info (frame)->flat) - { - if (get_frame_extra_info (frame)->pc_addr) - pc = PC_ADJUST ((CORE_ADDR) - read_memory_integer (get_frame_extra_info (frame)->pc_addr, - DEPRECATED_REGISTER_RAW_SIZE (PC_REGNUM))); - else - { - /* I think this happens only in the innermost frame, if so then - it is a complicated way of saying - "pc = read_register (O7_REGNUM);". */ - ULONGEST tmp; - tmp = get_frame_register_unsigned (frame, O7_REGNUM); - pc = PC_ADJUST (tmp); - } + cache->struct_return_p = 0; - write_register (PC_REGNUM, pc); - write_register (DEPRECATED_NPC_REGNUM, pc + 4); - } - else if (fsr[I7_REGNUM]) - { - /* Return address in %i7 -- adjust it, then restore PC and NPC from it */ - pc = PC_ADJUST ((CORE_ADDR) read_memory_integer (fsr[I7_REGNUM], - SPARC_INTREG_SIZE)); - write_register (PC_REGNUM, pc); - write_register (DEPRECATED_NPC_REGNUM, pc + 4); - } - flush_cached_frames (); + return cache; } -/* On the Sun 4 under SunOS, the compile will leave a fake insn which - encodes the structure size being returned. If we detect such - a fake insn, step past it. */ - CORE_ADDR -sparc_pc_adjust (CORE_ADDR pc) +sparc_analyze_prologue (CORE_ADDR pc, CORE_ADDR current_pc, + struct sparc_frame_cache *cache) { + struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); unsigned long insn; - char buf[4]; - int err; + int offset = 0; + int dest = -1; - err = target_read_memory (pc + 8, buf, 4); - insn = extract_unsigned_integer (buf, 4); - if ((err == 0) && (insn & 0xffc00000) == 0) - return pc + 12; - else - return pc + 8; -} + if (current_pc <= pc) + return current_pc; -/* If pc is in a shared library trampoline, return its target. - The SunOs 4.x linker rewrites the jump table entries for PIC - compiled modules in the main executable to bypass the dynamic linker - with jumps of the form - sethi %hi(addr),%g1 - jmp %g1+%lo(addr) - and removes the corresponding jump table relocation entry in the - dynamic relocations. - find_solib_trampoline_target relies on the presence of the jump - table relocation entry, so we have to detect these jump instructions - by hand. */ + /* We have to handle to "Procedure Linkage Table" (PLT) special. On + SPARC the linker usually defines a symbol (typically + _PROCEDURE_LINKAGE_TABLE_) at the start of the .plt section. + This symbol makes us end up here with PC pointing at the start of + the PLT and CURRENT_PC probably pointing at a PLT entry. If we + would do our normal prologue analysis, we would probably conclude + that we've got a frame when in reality we don't, since the + dynamic linker patches up the first PLT with some code that + starts with a SAVE instruction. Patch up PC such that it points + at the start of our PLT entry. */ + if (tdep->plt_entry_size > 0 && in_plt_section (current_pc, NULL)) + pc = current_pc - ((current_pc - pc) % tdep->plt_entry_size); -CORE_ADDR -sunos4_skip_trampoline_code (CORE_ADDR pc) -{ - unsigned long insn1; - char buf[4]; - int err; + insn = sparc_fetch_instruction (pc); - err = target_read_memory (pc, buf, 4); - insn1 = extract_unsigned_integer (buf, 4); - if (err == 0 && (insn1 & 0xffc00000) == 0x03000000) + /* Recognize a SETHI insn and record its destination. */ + if (X_OP (insn) == 0 && X_OP2 (insn) == 0x04) { - unsigned long insn2; - - err = target_read_memory (pc + 4, buf, 4); - insn2 = extract_unsigned_integer (buf, 4); - if (err == 0 && (insn2 & 0xffffe000) == 0x81c06000) - { - CORE_ADDR target_pc = (insn1 & 0x3fffff) << 10; - int delta = insn2 & 0x1fff; - - /* Sign extend the displacement. */ - if (delta & 0x1000) - delta |= ~0x1fff; - return target_pc + delta; - } - } - return find_solib_trampoline_target (pc); -} - -#ifdef USE_PROC_FS /* Target dependent support for /proc */ -/* *INDENT-OFF* */ -/* The /proc interface divides the target machine's register set up into - two different sets, the general register set (gregset) and the floating - point register set (fpregset). For each set, there is an ioctl to get - the current register set and another ioctl to set the current values. - - The actual structure passed through the ioctl interface is, of course, - naturally machine dependent, and is different for each set of registers. - For the sparc for example, the general register set is typically defined - by: - - typedef int gregset_t[38]; - - #define R_G0 0 - ... - #define R_TBR 37 - - and the floating point set by: - - typedef struct prfpregset { - union { - u_long pr_regs[32]; - double pr_dregs[16]; - } pr_fr; - void * pr_filler; - u_long pr_fsr; - u_char pr_qcnt; - u_char pr_q_entrysize; - u_char pr_en; - u_long pr_q[64]; - } prfpregset_t; - - These routines provide the packing and unpacking of gregset_t and - fpregset_t formatted data. - - */ -/* *INDENT-ON* */ - -/* Given a pointer to a general register set in /proc format (gregset_t *), - unpack the register contents and supply them as gdb's idea of the current - register values. */ + dest = X_RD (insn); + offset += 4; -void -supply_gregset (gdb_gregset_t *gregsetp) -{ - prgreg_t *regp = (prgreg_t *) gregsetp; - int regi, offset = 0; - - /* If the host is 64-bit sparc, but the target is 32-bit sparc, - then the gregset may contain 64-bit ints while supply_register - is expecting 32-bit ints. Compensate. */ - if (sizeof (regp[0]) == 8 && SPARC_INTREG_SIZE == 4) - offset = 4; - - /* GDB register numbers for Gn, On, Ln, In all match /proc reg numbers. */ - /* FIXME MVS: assumes the order of the first 32 elements... */ - for (regi = G0_REGNUM; regi <= I7_REGNUM; regi++) - { - supply_register (regi, ((char *) (regp + regi)) + offset); + insn = sparc_fetch_instruction (pc + 4); } - /* These require a bit more care. */ - supply_register (PC_REGNUM, ((char *) (regp + R_PC)) + offset); - supply_register (DEPRECATED_NPC_REGNUM, ((char *) (regp + R_nPC)) + offset); - supply_register (Y_REGNUM, ((char *) (regp + R_Y)) + offset); - - if (GDB_TARGET_IS_SPARC64) - { -#ifdef R_CCR - supply_register (CCR_REGNUM, ((char *) (regp + R_CCR)) + offset); -#else - supply_register (CCR_REGNUM, NULL); -#endif -#ifdef R_FPRS - supply_register (FPRS_REGNUM, ((char *) (regp + R_FPRS)) + offset); -#else - supply_register (FPRS_REGNUM, NULL); -#endif -#ifdef R_ASI - supply_register (ASI_REGNUM, ((char *) (regp + R_ASI)) + offset); -#else - supply_register (ASI_REGNUM, NULL); -#endif - } - else /* sparc32 */ + /* Allow for an arithmetic operation on DEST or %g1. */ + if (X_OP (insn) == 2 && X_I (insn) + && (X_RD (insn) == 1 || X_RD (insn) == dest)) { -#ifdef R_PS - supply_register (PS_REGNUM, ((char *) (regp + R_PS)) + offset); -#else - supply_register (PS_REGNUM, NULL); -#endif + offset += 4; - /* For 64-bit hosts, R_WIM and R_TBR may not be defined. - Steal R_ASI and R_FPRS, and hope for the best! */ - -#if !defined (R_WIM) && defined (R_ASI) -#define R_WIM R_ASI -#endif - -#if !defined (R_TBR) && defined (R_FPRS) -#define R_TBR R_FPRS -#endif - -#if defined (R_WIM) - supply_register (WIM_REGNUM, ((char *) (regp + R_WIM)) + offset); -#else - supply_register (WIM_REGNUM, NULL); -#endif - -#if defined (R_TBR) - supply_register (TBR_REGNUM, ((char *) (regp + R_TBR)) + offset); -#else - supply_register (TBR_REGNUM, NULL); -#endif + insn = sparc_fetch_instruction (pc + 8); } - /* Fill inaccessible registers with zero. */ - if (GDB_TARGET_IS_SPARC64) - { - /* - * don't know how to get value of any of the following: - */ - supply_register (VER_REGNUM, NULL); - supply_register (TICK_REGNUM, NULL); - supply_register (PIL_REGNUM, NULL); - supply_register (PSTATE_REGNUM, NULL); - supply_register (TSTATE_REGNUM, NULL); - supply_register (TBA_REGNUM, NULL); - supply_register (TL_REGNUM, NULL); - supply_register (TT_REGNUM, NULL); - supply_register (TPC_REGNUM, NULL); - supply_register (TNPC_REGNUM, NULL); - supply_register (WSTATE_REGNUM, NULL); - supply_register (CWP_REGNUM, NULL); - supply_register (CANSAVE_REGNUM, NULL); - supply_register (CANRESTORE_REGNUM, NULL); - supply_register (CLEANWIN_REGNUM, NULL); - supply_register (OTHERWIN_REGNUM, NULL); - supply_register (ASR16_REGNUM, NULL); - supply_register (ASR17_REGNUM, NULL); - supply_register (ASR18_REGNUM, NULL); - supply_register (ASR19_REGNUM, NULL); - supply_register (ASR20_REGNUM, NULL); - supply_register (ASR21_REGNUM, NULL); - supply_register (ASR22_REGNUM, NULL); - supply_register (ASR23_REGNUM, NULL); - supply_register (ASR24_REGNUM, NULL); - supply_register (ASR25_REGNUM, NULL); - supply_register (ASR26_REGNUM, NULL); - supply_register (ASR27_REGNUM, NULL); - supply_register (ASR28_REGNUM, NULL); - supply_register (ASR29_REGNUM, NULL); - supply_register (ASR30_REGNUM, NULL); - supply_register (ASR31_REGNUM, NULL); - supply_register (ICC_REGNUM, NULL); - supply_register (XCC_REGNUM, NULL); - } - else + /* Check for the SAVE instruction that sets up the frame. */ + if (X_OP (insn) == 2 && X_OP3 (insn) == 0x3c) { - supply_register (CPS_REGNUM, NULL); + cache->frameless_p = 0; + return pc + offset + 4; } + + return pc; } -void -fill_gregset (gdb_gregset_t *gregsetp, int regno) +static CORE_ADDR +sparc_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame) { - prgreg_t *regp = (prgreg_t *) gregsetp; - int regi, offset = 0; - - /* If the host is 64-bit sparc, but the target is 32-bit sparc, - then the gregset may contain 64-bit ints while supply_register - is expecting 32-bit ints. Compensate. */ - if (sizeof (regp[0]) == 8 && SPARC_INTREG_SIZE == 4) - offset = 4; - - for (regi = 0; regi <= R_I7; regi++) - if ((regno == -1) || (regno == regi)) - deprecated_read_register_gen (regi, (char *) (regp + regi) + offset); - - if ((regno == -1) || (regno == PC_REGNUM)) - deprecated_read_register_gen (PC_REGNUM, (char *) (regp + R_PC) + offset); + struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); + return frame_unwind_register_unsigned (next_frame, tdep->pc_regnum); +} - if ((regno == -1) || (regno == DEPRECATED_NPC_REGNUM)) - deprecated_read_register_gen (DEPRECATED_NPC_REGNUM, (char *) (regp + R_nPC) + offset); +/* Return PC of first real instruction of the function starting at + START_PC. */ - if ((regno == -1) || (regno == Y_REGNUM)) - deprecated_read_register_gen (Y_REGNUM, (char *) (regp + R_Y) + offset); +static CORE_ADDR +sparc32_skip_prologue (CORE_ADDR start_pc) +{ + struct symtab_and_line sal; + CORE_ADDR func_start, func_end; + struct sparc_frame_cache cache; - if (GDB_TARGET_IS_SPARC64) - { -#ifdef R_CCR - if (regno == -1 || regno == CCR_REGNUM) - deprecated_read_register_gen (CCR_REGNUM, ((char *) (regp + R_CCR)) + offset); -#endif -#ifdef R_FPRS - if (regno == -1 || regno == FPRS_REGNUM) - deprecated_read_register_gen (FPRS_REGNUM, ((char *) (regp + R_FPRS)) + offset); -#endif -#ifdef R_ASI - if (regno == -1 || regno == ASI_REGNUM) - deprecated_read_register_gen (ASI_REGNUM, ((char *) (regp + R_ASI)) + offset); -#endif - } - else /* sparc32 */ + /* This is the preferred method, find the end of the prologue by + using the debugging information. */ + if (find_pc_partial_function (start_pc, NULL, &func_start, &func_end)) { -#ifdef R_PS - if (regno == -1 || regno == PS_REGNUM) - deprecated_read_register_gen (PS_REGNUM, ((char *) (regp + R_PS)) + offset); -#endif + sal = find_pc_line (func_start, 0); - /* For 64-bit hosts, R_WIM and R_TBR may not be defined. - Steal R_ASI and R_FPRS, and hope for the best! */ + if (sal.end < func_end + && start_pc <= sal.end) + return sal.end; + } -#if !defined (R_WIM) && defined (R_ASI) -#define R_WIM R_ASI -#endif + return sparc_analyze_prologue (start_pc, 0xffffffffUL, &cache); +} -#if !defined (R_TBR) && defined (R_FPRS) -#define R_TBR R_FPRS -#endif +/* Normal frames. */ -#if defined (R_WIM) - if (regno == -1 || regno == WIM_REGNUM) - deprecated_read_register_gen (WIM_REGNUM, ((char *) (regp + R_WIM)) + offset); -#else - if (regno == -1 || regno == WIM_REGNUM) - deprecated_read_register_gen (WIM_REGNUM, NULL); -#endif +struct sparc_frame_cache * +sparc_frame_cache (struct frame_info *next_frame, void **this_cache) +{ + struct sparc_frame_cache *cache; -#if defined (R_TBR) - if (regno == -1 || regno == TBR_REGNUM) - deprecated_read_register_gen (TBR_REGNUM, ((char *) (regp + R_TBR)) + offset); -#else - if (regno == -1 || regno == TBR_REGNUM) - deprecated_read_register_gen (TBR_REGNUM, NULL); -#endif - } -} + if (*this_cache) + return *this_cache; -/* Given a pointer to a floating point register set in /proc format - (fpregset_t *), unpack the register contents and supply them as gdb's - idea of the current floating point register values. */ + cache = sparc_alloc_frame_cache (); + *this_cache = cache; -void -supply_fpregset (gdb_fpregset_t *fpregsetp) -{ - int regi; - char *from; + /* In priciple, for normal frames, %fp (%i6) holds the frame + pointer, which holds the base address for the current stack + frame. */ - if (!SPARC_HAS_FPU) - return; + cache->base = frame_unwind_register_unsigned (next_frame, SPARC_FP_REGNUM); + if (cache->base == 0) + return cache; - for (regi = FP0_REGNUM; regi < FP_MAX_REGNUM; regi++) + cache->pc = frame_func_unwind (next_frame); + if (cache->pc != 0) { - from = (char *) &fpregsetp->pr_fr.pr_regs[regi - FP0_REGNUM]; - supply_register (regi, from); + CORE_ADDR addr_in_block = frame_unwind_address_in_block (next_frame); + sparc_analyze_prologue (cache->pc, addr_in_block, cache); } - if (GDB_TARGET_IS_SPARC64) + if (cache->frameless_p) { - /* - * don't know how to get value of the following. - */ - supply_register (FSR_REGNUM, NULL); /* zero it out for now */ - supply_register (FCC0_REGNUM, NULL); - supply_register (FCC1_REGNUM, NULL); /* don't know how to get value */ - supply_register (FCC2_REGNUM, NULL); /* don't know how to get value */ - supply_register (FCC3_REGNUM, NULL); /* don't know how to get value */ + /* We didn't find a valid frame, which means that CACHE->base + currently holds the frame pointer for our calling frame. */ + cache->base = frame_unwind_register_unsigned (next_frame, + SPARC_SP_REGNUM); } - else - { - supply_register (FPS_REGNUM, (char *) &(fpregsetp->pr_fsr)); - } -} -/* Given a pointer to a floating point register set in /proc format - (fpregset_t *), update the register specified by REGNO from gdb's idea - of the current floating point register set. If REGNO is -1, update - them all. */ -/* This will probably need some changes for sparc64. */ + return cache; +} -void -fill_fpregset (gdb_fpregset_t *fpregsetp, int regno) +struct sparc_frame_cache * +sparc32_frame_cache (struct frame_info *next_frame, void **this_cache) { - int regi; - char *to; - char *from; + struct sparc_frame_cache *cache; + struct symbol *sym; - if (!SPARC_HAS_FPU) - return; + if (*this_cache) + return *this_cache; - for (regi = FP0_REGNUM; regi < FP_MAX_REGNUM; regi++) + cache = sparc_frame_cache (next_frame, this_cache); + + sym = find_pc_function (cache->pc); + if (sym) { - if ((regno == -1) || (regno == regi)) + struct type *type = check_typedef (SYMBOL_TYPE (sym)); + enum type_code code = TYPE_CODE (type); + + if (code == TYPE_CODE_FUNC || code == TYPE_CODE_METHOD) { - from = (char *) &deprecated_registers[DEPRECATED_REGISTER_BYTE (regi)]; - to = (char *) &fpregsetp->pr_fr.pr_regs[regi - FP0_REGNUM]; - memcpy (to, from, DEPRECATED_REGISTER_RAW_SIZE (regi)); + type = check_typedef (TYPE_TARGET_TYPE (type)); + if (sparc_structure_or_union_p (type) + || (sparc_floating_p (type) && TYPE_LENGTH (type) == 16)) + cache->struct_return_p = 1; } } - if (!(GDB_TARGET_IS_SPARC64)) /* FIXME: does Sparc64 have this register? */ - if ((regno == -1) || (regno == FPS_REGNUM)) - { - from = (char *)&deprecated_registers[DEPRECATED_REGISTER_BYTE (FPS_REGNUM)]; - to = (char *) &fpregsetp->pr_fsr; - memcpy (to, from, DEPRECATED_REGISTER_RAW_SIZE (FPS_REGNUM)); - } + return cache; } -#endif /* USE_PROC_FS */ - -/* Because of Multi-arch, GET_LONGJMP_TARGET is always defined. So test - for a definition of JB_PC. */ -#ifdef JB_PC - -/* Figure out where the longjmp will land. We expect that we have just entered - longjmp and haven't yet setup the stack frame, so the args are still in the - output regs. %o0 (O0_REGNUM) points at the jmp_buf structure from which we - extract the pc (JB_PC) that we will land at. The pc is copied into ADDR. - This routine returns true on success */ - -int -get_longjmp_target (CORE_ADDR *pc) +static void +sparc32_frame_this_id (struct frame_info *next_frame, void **this_cache, + struct frame_id *this_id) { - CORE_ADDR jb_addr; -#define LONGJMP_TARGET_SIZE 4 - char buf[LONGJMP_TARGET_SIZE]; + struct sparc_frame_cache *cache = + sparc32_frame_cache (next_frame, this_cache); - jb_addr = read_register (O0_REGNUM); - - if (target_read_memory (jb_addr + JB_PC * JB_ELEMENT_SIZE, buf, - LONGJMP_TARGET_SIZE)) - return 0; - - *pc = extract_unsigned_integer (buf, LONGJMP_TARGET_SIZE); - - return 1; -} -#endif /* GET_LONGJMP_TARGET */ - -#ifdef STATIC_TRANSFORM_NAME -/* SunPRO (3.0 at least), encodes the static variables. This is not - related to C++ mangling, it is done for C too. */ + /* This marks the outermost frame. */ + if (cache->base == 0) + return; -char * -sunpro_static_transform_name (char *name) -{ - char *p; - if (name[0] == '$') - { - /* For file-local statics there will be a dollar sign, a bunch - of junk (the contents of which match a string given in the - N_OPT), a period and the name. For function-local statics - there will be a bunch of junk (which seems to change the - second character from 'A' to 'B'), a period, the name of the - function, and the name. So just skip everything before the - last period. */ - p = strrchr (name, '.'); - if (p != NULL) - name = p + 1; - } - return name; + (*this_id) = frame_id_build (cache->base, cache->pc); } -#endif /* STATIC_TRANSFORM_NAME */ - - -/* Utilities for printing registers. - Page numbers refer to the SPARC Architecture Manual. */ - -static void dump_ccreg (char *, int); static void -dump_ccreg (char *reg, int val) +sparc32_frame_prev_register (struct frame_info *next_frame, void **this_cache, + int regnum, int *optimizedp, + enum lval_type *lvalp, CORE_ADDR *addrp, + int *realnump, void *valuep) { - /* page 41 */ - printf_unfiltered ("%s:%s,%s,%s,%s", reg, - val & 8 ? "N" : "NN", - val & 4 ? "Z" : "NZ", - val & 2 ? "O" : "NO", - val & 1 ? "C" : "NC"); -} + struct sparc_frame_cache *cache = + sparc32_frame_cache (next_frame, this_cache); -static char * -decode_asi (int val) -{ - /* page 72 */ - switch (val) + if (regnum == SPARC32_PC_REGNUM || regnum == SPARC32_NPC_REGNUM) { - case 4: - return "ASI_NUCLEUS"; - case 0x0c: - return "ASI_NUCLEUS_LITTLE"; - case 0x10: - return "ASI_AS_IF_USER_PRIMARY"; - case 0x11: - return "ASI_AS_IF_USER_SECONDARY"; - case 0x18: - return "ASI_AS_IF_USER_PRIMARY_LITTLE"; - case 0x19: - return "ASI_AS_IF_USER_SECONDARY_LITTLE"; - case 0x80: - return "ASI_PRIMARY"; - case 0x81: - return "ASI_SECONDARY"; - case 0x82: - return "ASI_PRIMARY_NOFAULT"; - case 0x83: - return "ASI_SECONDARY_NOFAULT"; - case 0x88: - return "ASI_PRIMARY_LITTLE"; - case 0x89: - return "ASI_SECONDARY_LITTLE"; - case 0x8a: - return "ASI_PRIMARY_NOFAULT_LITTLE"; - case 0x8b: - return "ASI_SECONDARY_NOFAULT_LITTLE"; - default: - return NULL; - } -} + *optimizedp = 0; + *lvalp = not_lval; + *addrp = 0; + *realnump = -1; + if (valuep) + { + CORE_ADDR pc = (regnum == SPARC32_NPC_REGNUM) ? 4 : 0; -/* Pretty print various registers. */ -/* FIXME: Would be nice if this did some fancy things for 32 bit sparc. */ + /* If this functions has a Structure, Union or + Quad-Precision return value, we have to skip the UNIMP + instruction that encodes the size of the structure. */ + if (cache->struct_return_p) + pc += 4; -static void -sparc_print_register_hook (int regno) -{ - ULONGEST val; - - /* Handle double/quad versions of lower 32 fp regs. */ - if (regno >= FP0_REGNUM && regno < FP0_REGNUM + 32 - && (regno & 1) == 0) - { - char value[16]; - - if (frame_register_read (deprecated_selected_frame, regno, value) - && frame_register_read (deprecated_selected_frame, regno + 1, value + 4)) - { - printf_unfiltered ("\t"); - print_floating (value, builtin_type_double, gdb_stdout); - } -#if 0 /* FIXME: gdb doesn't handle long doubles */ - if ((regno & 3) == 0) - { - if (frame_register_read (deprecated_selected_frame, regno + 2, value + 8) - && frame_register_read (deprecated_selected_frame, regno + 3, value + 12)) - { - printf_unfiltered ("\t"); - print_floating (value, builtin_type_long_double, gdb_stdout); - } + regnum = cache->frameless_p ? SPARC_O7_REGNUM : SPARC_I7_REGNUM; + pc += frame_unwind_register_unsigned (next_frame, regnum) + 8; + store_unsigned_integer (valuep, 4, pc); } -#endif return; } -#if 0 /* FIXME: gdb doesn't handle long doubles */ - /* Print upper fp regs as long double if appropriate. */ - if (regno >= FP0_REGNUM + 32 && regno < FP_MAX_REGNUM - /* We test for even numbered regs and not a multiple of 4 because - the upper fp regs are recorded as doubles. */ - && (regno & 1) == 0) + /* The previous frame's `local' and `in' registers have been saved + in the register save area. */ + if (!cache->frameless_p + && regnum >= SPARC_L0_REGNUM && regnum <= SPARC_I7_REGNUM) { - char value[16]; - - if (frame_register_read (deprecated_selected_frame, regno, value) - && frame_register_read (deprecated_selected_frame, regno + 1, value + 8)) + *optimizedp = 0; + *lvalp = lval_memory; + *addrp = cache->base + (regnum - SPARC_L0_REGNUM) * 4; + *realnump = -1; + if (valuep) { - printf_unfiltered ("\t"); - print_floating (value, builtin_type_long_double, gdb_stdout); + struct gdbarch *gdbarch = get_frame_arch (next_frame); + + /* Read the value in from memory. */ + read_memory (*addrp, valuep, register_size (gdbarch, regnum)); } return; } -#endif - - /* FIXME: Some of these are priviledged registers. - Not sure how they should be handled. */ - -#define BITS(n, mask) ((int) (((val) >> (n)) & (mask))) - - val = read_register (regno); - /* pages 40 - 60 */ - if (GDB_TARGET_IS_SPARC64) - switch (regno) - { - case CCR_REGNUM: - printf_unfiltered ("\t"); - dump_ccreg ("xcc", val >> 4); - printf_unfiltered (", "); - dump_ccreg ("icc", val & 15); - break; - case FPRS_REGNUM: - printf ("\tfef:%d, du:%d, dl:%d", - BITS (2, 1), BITS (1, 1), BITS (0, 1)); - break; - case FSR_REGNUM: - { - static char *fcc[4] = - {"=", "<", ">", "?"}; - static char *rd[4] = - {"N", "0", "+", "-"}; - /* Long, but I'd rather leave it as is and use a wide screen. */ - printf_filtered ("\t0:%s, 1:%s, 2:%s, 3:%s, rd:%s, tem:%d, ", - fcc[BITS (10, 3)], fcc[BITS (32, 3)], - fcc[BITS (34, 3)], fcc[BITS (36, 3)], - rd[BITS (30, 3)], BITS (23, 31)); - printf_filtered ("ns:%d, ver:%d, ftt:%d, qne:%d, aexc:%d, cexc:%d", - BITS (22, 1), BITS (17, 7), BITS (14, 7), - BITS (13, 1), BITS (5, 31), BITS (0, 31)); - break; - } - case ASI_REGNUM: - { - char *asi = decode_asi (val); - if (asi != NULL) - printf ("\t%s", asi); - break; - } - case VER_REGNUM: - printf ("\tmanuf:%d, impl:%d, mask:%d, maxtl:%d, maxwin:%d", - BITS (48, 0xffff), BITS (32, 0xffff), - BITS (24, 0xff), BITS (8, 0xff), BITS (0, 31)); - break; - case PSTATE_REGNUM: - { - static char *mm[4] = - {"tso", "pso", "rso", "?"}; - printf_filtered ("\tcle:%d, tle:%d, mm:%s, red:%d, ", - BITS (9, 1), BITS (8, 1), - mm[BITS (6, 3)], BITS (5, 1)); - printf_filtered ("pef:%d, am:%d, priv:%d, ie:%d, ag:%d", - BITS (4, 1), BITS (3, 1), BITS (2, 1), - BITS (1, 1), BITS (0, 1)); - break; - } - case TSTATE_REGNUM: - /* FIXME: print all 4? */ - break; - case TT_REGNUM: - /* FIXME: print all 4? */ - break; - case TPC_REGNUM: - /* FIXME: print all 4? */ - break; - case TNPC_REGNUM: - /* FIXME: print all 4? */ - break; - case WSTATE_REGNUM: - printf ("\tother:%d, normal:%d", BITS (3, 7), BITS (0, 7)); - break; - case CWP_REGNUM: - printf ("\t%d", BITS (0, 31)); - break; - case CANSAVE_REGNUM: - printf ("\t%-2d before spill", BITS (0, 31)); - break; - case CANRESTORE_REGNUM: - printf ("\t%-2d before fill", BITS (0, 31)); - break; - case CLEANWIN_REGNUM: - printf ("\t%-2d before clean", BITS (0, 31)); - break; - case OTHERWIN_REGNUM: - printf ("\t%d", BITS (0, 31)); - break; - } - else /* Sparc32 */ - switch (regno) - { - case PS_REGNUM: - printf ("\ticc:%c%c%c%c, pil:%d, s:%d, ps:%d, et:%d, cwp:%d", - BITS (23, 1) ? 'N' : '-', BITS (22, 1) ? 'Z' : '-', - BITS (21, 1) ? 'V' : '-', BITS (20, 1) ? 'C' : '-', - BITS (8, 15), BITS (7, 1), BITS (6, 1), BITS (5, 1), - BITS (0, 31)); - break; - case FPS_REGNUM: - { - static char *fcc[4] = - {"=", "<", ">", "?"}; - static char *rd[4] = - {"N", "0", "+", "-"}; - /* Long, but I'd rather leave it as is and use a wide screen. */ - printf ("\trd:%s, tem:%d, ns:%d, ver:%d, ftt:%d, qne:%d, " - "fcc:%s, aexc:%d, cexc:%d", - rd[BITS (30, 3)], BITS (23, 31), BITS (22, 1), BITS (17, 7), - BITS (14, 7), BITS (13, 1), fcc[BITS (10, 3)], BITS (5, 31), - BITS (0, 31)); - break; - } - } + /* The previous frame's `out' registers are accessable as the + current frame's `in' registers. */ + if (!cache->frameless_p + && regnum >= SPARC_O0_REGNUM && regnum <= SPARC_O7_REGNUM) + regnum += (SPARC_I0_REGNUM - SPARC_O0_REGNUM); -#undef BITS + frame_register_unwind (next_frame, regnum, + optimizedp, lvalp, addrp, realnump, valuep); } -static void -sparc_print_registers (struct gdbarch *gdbarch, - struct ui_file *file, - struct frame_info *frame, - int regnum, int print_all, - void (*print_register_hook) (int)) +static const struct frame_unwind sparc32_frame_unwind = { - int i; - const int numregs = NUM_REGS + NUM_PSEUDO_REGS; - char raw_buffer[MAX_REGISTER_SIZE]; - char virtual_buffer[MAX_REGISTER_SIZE]; - - for (i = 0; i < numregs; i++) - { - /* Decide between printing all regs, non-float / vector regs, or - specific reg. */ - if (regnum == -1) - { - if (!print_all) - { - if (TYPE_CODE (DEPRECATED_REGISTER_VIRTUAL_TYPE (i)) == TYPE_CODE_FLT) - continue; - if (TYPE_VECTOR (DEPRECATED_REGISTER_VIRTUAL_TYPE (i))) - continue; - } - } - else - { - if (i != regnum) - continue; - } - - /* If the register name is empty, it is undefined for this - processor, so don't display anything. */ - if (REGISTER_NAME (i) == NULL || *(REGISTER_NAME (i)) == '\0') - continue; - - fputs_filtered (REGISTER_NAME (i), file); - print_spaces_filtered (15 - strlen (REGISTER_NAME (i)), file); - - /* Get the data in raw format. */ - if (! frame_register_read (frame, i, raw_buffer)) - { - fprintf_filtered (file, "*value not available*\n"); - continue; - } - - memcpy (virtual_buffer, raw_buffer, DEPRECATED_REGISTER_VIRTUAL_SIZE (i)); - - /* If virtual format is floating, print it that way, and in raw - hex. */ - if (TYPE_CODE (DEPRECATED_REGISTER_VIRTUAL_TYPE (i)) == TYPE_CODE_FLT) - { - int j; - - val_print (DEPRECATED_REGISTER_VIRTUAL_TYPE (i), virtual_buffer, 0, 0, - file, 0, 1, 0, Val_pretty_default); + NORMAL_FRAME, + sparc32_frame_this_id, + sparc32_frame_prev_register +}; - fprintf_filtered (file, "\t(raw 0x"); - for (j = 0; j < DEPRECATED_REGISTER_RAW_SIZE (i); j++) - { - int idx; - if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) - idx = j; - else - idx = DEPRECATED_REGISTER_RAW_SIZE (i) - 1 - j; - fprintf_filtered (file, "%02x", (unsigned char) raw_buffer[idx]); - } - fprintf_filtered (file, ")"); - } - else - { - /* Print the register in hex. */ - val_print (DEPRECATED_REGISTER_VIRTUAL_TYPE (i), virtual_buffer, 0, 0, - file, 'x', 1, 0, Val_pretty_default); - /* If not a vector register, print it also according to its - natural format. */ - if (TYPE_VECTOR (DEPRECATED_REGISTER_VIRTUAL_TYPE (i)) == 0) - { - fprintf_filtered (file, "\t"); - val_print (DEPRECATED_REGISTER_VIRTUAL_TYPE (i), virtual_buffer, 0, 0, - file, 0, 1, 0, Val_pretty_default); - } - } +static const struct frame_unwind * +sparc32_frame_sniffer (struct frame_info *next_frame) +{ + return &sparc32_frame_unwind; +} + - /* Some sparc specific info. */ - if (print_register_hook != NULL) - print_register_hook (i); +static CORE_ADDR +sparc32_frame_base_address (struct frame_info *next_frame, void **this_cache) +{ + struct sparc_frame_cache *cache = + sparc32_frame_cache (next_frame, this_cache); - fprintf_filtered (file, "\n"); - } + return cache->base; } -static void -sparc_print_registers_info (struct gdbarch *gdbarch, - struct ui_file *file, - struct frame_info *frame, - int regnum, int print_all) +static const struct frame_base sparc32_frame_base = { - sparc_print_registers (gdbarch, file, frame, regnum, print_all, - sparc_print_register_hook); -} + &sparc32_frame_unwind, + sparc32_frame_base_address, + sparc32_frame_base_address, + sparc32_frame_base_address +}; -void -sparc_do_registers_info (int regnum, int all) +static struct frame_id +sparc_unwind_dummy_id (struct gdbarch *gdbarch, struct frame_info *next_frame) { - sparc_print_registers_info (current_gdbarch, gdb_stdout, deprecated_selected_frame, - regnum, all); -} + CORE_ADDR sp; -#define SPARC_F0_REGNUM FP0_REGNUM /* %f0 */ -#define SPARC_F1_REGNUM (FP0_REGNUM + 1)/* %f1 */ -#define SPARC_O0_REGNUM O0_REGNUM /* %o0 */ -#define SPARC_O1_REGNUM O1_REGNUM /* %o1 */ + sp = frame_unwind_register_unsigned (next_frame, SPARC_SP_REGNUM); + return frame_id_build (sp, frame_pc_unwind (next_frame)); +} + -/* Push the arguments onto the stack and into the appropriate registers. */ +/* Extract from an array REGBUF containing the (raw) register state, a + function return value of TYPE, and copy that into VALBUF. */ -static CORE_ADDR -sparc32_do_push_arguments (struct regcache *regcache, int nargs, - struct value **args, CORE_ADDR sp) +static void +sparc32_extract_return_value (struct type *type, struct regcache *regcache, + void *valbuf) { - CORE_ADDR *addr; - int size = 0; - int i; + int len = TYPE_LENGTH (type); + char buf[8]; - /* Structure, union and quad-precision arguments are passed by - reference. We allocate space for these arguments on the stack - and record their addresses in an array. Array elements for - arguments that are passed by value will be set to zero.*/ - addr = alloca (nargs * sizeof (CORE_ADDR)); + gdb_assert (!sparc_structure_or_union_p (type)); + gdb_assert (!(sparc_floating_p (type) && len == 16)); - for (i = nargs - 1; i >= 0; i--) + if (sparc_floating_p (type)) { - struct type *type = VALUE_ENCLOSING_TYPE (args[i]); - enum type_code code = TYPE_CODE (type); - int len = TYPE_LENGTH (type); + /* Floating return values. */ + regcache_cooked_read (regcache, SPARC_F0_REGNUM, buf); + if (len > 4) + regcache_cooked_read (regcache, SPARC_F1_REGNUM, buf + 4); + memcpy (valbuf, buf, len); + } + else + { + /* Integral and pointer return values. */ + gdb_assert (sparc_integral_or_pointer_p (type)); - /* Push the contents of structure, union and quad-precision - arguments on the stack. */ - if (code == TYPE_CODE_STRUCT || code == TYPE_CODE_UNION || len > 8) + regcache_cooked_read (regcache, SPARC_O0_REGNUM, buf); + if (len > 4) { - /* Keep the stack doubleword aligned. */ - sp -= (len + 7) & ~7; - write_memory (sp, VALUE_CONTENTS_ALL (args[i]), len); - addr[i] = sp; - size += 4; + regcache_cooked_read (regcache, SPARC_O1_REGNUM, buf + 4); + gdb_assert (len == 8); + memcpy (valbuf, buf, 8); } else { - addr[i] = 0; - size += (len > 4) ? 8 : 4; + /* Just stripping off any unused bytes should preserve the + signed-ness just fine. */ + memcpy (valbuf, buf + 4 - len, len); } } +} - /* The needed space for outgoing arguments should be a multiple of 4. */ - gdb_assert (size % 4 == 0); +/* Write into the appropriate registers a function return value stored + in VALBUF of type TYPE. */ - /* Make sure we reserve space for the first six words of arguments - in the stack frame, even if we don't need them. */ - if (size < 24) - sp -= (24 - size); +static void +sparc32_store_return_value (struct type *type, struct regcache *regcache, + const void *valbuf) +{ + int len = TYPE_LENGTH (type); + char buf[8]; - /* Make sure we end up with a doubleword aligned stack in the end. - Reserve an extra word if necessary in order to accomplish this. */ - if ((sp - size) % 8 == 0) - sp -= 4; + gdb_assert (!sparc_structure_or_union_p (type)); + gdb_assert (!(sparc_floating_p (type) && len == 16)); - /* Now push the arguments onto the stack. */ - for (i = nargs - 1; i >=0; i--) + if (sparc_floating_p (type)) + { + /* Floating return values. */ + memcpy (buf, valbuf, len); + regcache_cooked_write (regcache, SPARC_F0_REGNUM, buf); + if (len > 4) + regcache_cooked_write (regcache, SPARC_F1_REGNUM, buf + 4); + } + else { - char buf[8]; - int len; + /* Integral and pointer return values. */ + gdb_assert (sparc_integral_or_pointer_p (type)); - if (addr[i]) + if (len > 4) { - store_unsigned_integer (buf, 4, addr[i]); - len = 4; + gdb_assert (len == 8); + memcpy (buf, valbuf, 8); + regcache_cooked_write (regcache, SPARC_O1_REGNUM, buf + 4); } else { - struct value *arg = args[i]; - - len = TYPE_LENGTH (VALUE_ENCLOSING_TYPE (arg)); - - /* Expand signed and unsigned bytes and halfwords as needed. */ - if (len < 4) - { - arg = value_cast (builtin_type_long, arg); - len = 4; - } - else if (len > 4 && len < 8) - { - arg = value_cast (builtin_type_long_long, arg); - len = 4; - } - - gdb_assert (len == 4 || len == 8); - memcpy (buf, VALUE_CONTENTS_ALL (arg), len); - } - - /* We always write the argument word on the stack. */ - sp -= len; - write_memory (sp, buf, len); - - /* If this argument occupies one of the first 6 words, write it - into the appropriate register too. */ - size -= len; - if (size < 24) - { - int regnum = SPARC_O0_REGNUM + (size / 4); - - regcache_cooked_write (regcache, regnum, buf); - if (len == 8 && size < 20) - regcache_cooked_write (regcache, regnum + 1, buf + 4); + /* ??? Do we need to do any sign-extension here? */ + memcpy (buf + 4 - len, valbuf, len); } + regcache_cooked_write (regcache, SPARC_O0_REGNUM, buf); } +} - /* Reserve space for the struct/union return value pointer. */ - sp -= 4; +static enum return_value_convention +sparc32_return_value (struct gdbarch *gdbarch, struct type *type, + struct regcache *regcache, void *readbuf, + const void *writebuf) +{ + if (sparc_structure_or_union_p (type) + || (sparc_floating_p (type) && TYPE_LENGTH (type) == 16)) + return RETURN_VALUE_STRUCT_CONVENTION; - /* Stack should be doubleword aligned at this point. */ - gdb_assert (sp % 8 == 0); + if (readbuf) + sparc32_extract_return_value (type, regcache, readbuf); + if (writebuf) + sparc32_store_return_value (type, regcache, writebuf); - /* Return the adjusted stack pointer. */ - return sp; + return RETURN_VALUE_REGISTER_CONVENTION; } -/* The SPARC passes the arguments on the stack; arguments smaller - than an int are promoted to an int. The first 6 words worth of - args are also passed in registers o0 - o5. */ - -CORE_ADDR -sparc32_push_arguments (int nargs, struct value **args, CORE_ADDR sp, - int struct_return, CORE_ADDR struct_addr) -{ - sp = sparc32_do_push_arguments (current_regcache, nargs, args, sp); - - /* FIXME: kettenis/20030525: We don't let this function set the - struct/union return pointer just yet. */ #if 0 - if (struct_return) - { - char buf[4]; +/* NOTE: cagney/2004-01-17: For the moment disable this method. The + architecture and CORE-gdb will need new code (and a replacement for + EXTRACT_STRUCT_VALUE_ADDRESS) before this can be made to work + robustly. Here is a possible function signature: */ +/* NOTE: cagney/2004-01-17: So far only the 32-bit SPARC ABI has been + identifed as having a way to robustly recover the address of a + struct-convention return-value (after the function has returned). + For all other ABIs so far examined, the calling convention makes no + guarenteed that the register containing the return-value will be + preserved and hence that the return-value's address can be + recovered. */ +/* Extract from REGCACHE, which contains the (raw) register state, the + address in which a function should return its structure value, as a + CORE_ADDR. */ - /* The space for the struct/union return value pointer has - already been reserved. */ - store_unsigned_integer (buf, 4, struct_addr); - write (sp, buf, 4); - } +static CORE_ADDR +sparc32_extract_struct_value_address (struct regcache *regcache) +{ + ULONGEST sp; - return sp; -#else - return sp + 4; -#endif + regcache_cooked_read_unsigned (regcache, SPARC_SP_REGNUM, &sp); + return read_memory_unsigned_integer (sp + 64, 4); } +#endif -/* Extract from REGCACHE a function return value of type TYPE and copy - that into VALBUF. +static int +sparc32_stabs_argument_has_addr (struct gdbarch *gdbarch, struct type *type) +{ + return (sparc_structure_or_union_p (type) + || (sparc_floating_p (type) && TYPE_LENGTH (type) == 16)); +} - Note that REGCACHE specifies the register values for the frame of - the calling function. This means that we need to fetch the value - form %o0 and %o1, which correspond to %i0 and %i1 in the frame of - the called function. */ + +/* The SPARC Architecture doesn't have hardware single-step support, + and most operating systems don't implement it either, so we provide + software single-step mechanism. */ -void -sparc32_extract_return_value (struct type *type, struct regcache *regcache, - void *valbuf) +static CORE_ADDR +sparc_analyze_control_transfer (CORE_ADDR pc, CORE_ADDR *npc) { - int len = TYPE_LENGTH (type); - char buf[8]; + unsigned long insn = sparc_fetch_instruction (pc); + int conditional_p = X_COND (insn) & 0x7; + int branch_p = 0; + long offset = 0; /* Must be signed for sign-extend. */ - if (TYPE_CODE (type) == TYPE_CODE_FLT && SPARC_HAS_FPU) + if (X_OP (insn) == 0 && X_OP2 (insn) == 3 && (insn & 0x1000000) == 0) { - if (len == 4 || len == 8) - { - regcache_cooked_read (regcache, SPARC_F0_REGNUM, buf); - regcache_cooked_read (regcache, SPARC_F1_REGNUM, buf + 4); - memcpy (valbuf, buf, len); - return; - } - else - internal_error (__FILE__, __LINE__, "\ -Cannot extract floating-point return value of %d bytes long.", len); + /* Branch on Integer Register with Prediction (BPr). */ + branch_p = 1; + conditional_p = 1; } - - if (len <= 4) + else if (X_OP (insn) == 0 && X_OP2 (insn) == 6) { - regcache_cooked_read (regcache, SPARC_O0_REGNUM, buf); - memcpy (valbuf, buf + 4 - len, len); + /* Branch on Floating-Point Condition Codes (FBfcc). */ + branch_p = 1; + offset = 4 * X_DISP22 (insn); } - else if (len <= 8) + else if (X_OP (insn) == 0 && X_OP2 (insn) == 5) { - regcache_cooked_read (regcache, SPARC_O0_REGNUM, buf); - regcache_cooked_read (regcache, SPARC_O1_REGNUM, buf + 4); - memcpy (valbuf, buf + 8 - len, len); + /* Branch on Floating-Point Condition Codes with Prediction + (FBPfcc). */ + branch_p = 1; + offset = 4 * X_DISP19 (insn); + } + else if (X_OP (insn) == 0 && X_OP2 (insn) == 2) + { + /* Branch on Integer Condition Codes (Bicc). */ + branch_p = 1; + offset = 4 * X_DISP22 (insn); + } + else if (X_OP (insn) == 0 && X_OP2 (insn) == 1) + { + /* Branch on Integer Condition Codes with Prediction (BPcc). */ + branch_p = 1; + offset = 4 * X_DISP19 (insn); } - else - internal_error (__FILE__, __LINE__, - "Cannot extract return value of %d bytes long.", len); -} -/* Write into REGBUF a function return value VALBUF of type TYPE. */ + /* FIXME: Handle DONE and RETRY instructions. */ -void -sparc32_store_return_value (struct type *type, struct regcache *regcache, - const void *valbuf) -{ - int len = TYPE_LENGTH (type); - char buf[8]; + /* FIXME: Handle the Trap instruction. */ - if (TYPE_CODE (type) == TYPE_CODE_FLT && SPARC_HAS_FPU) + if (branch_p) { - const char *buf = valbuf; - - if (len == 4) + if (conditional_p) { - regcache_cooked_write (regcache, SPARC_F0_REGNUM, buf); - return; + /* For conditional branches, return nPC + 4 iff the annul + bit is 1. */ + return (X_A (insn) ? *npc + 4 : 0); } - else if (len == 8) + else { - regcache_cooked_write (regcache, SPARC_F0_REGNUM, buf); - regcache_cooked_write (regcache, SPARC_F1_REGNUM, buf + 4); - return; + /* For unconditional branches, return the target if its + specified condition is "always" and return nPC + 4 if the + condition is "never". If the annul bit is 1, set *NPC to + zero. */ + if (X_COND (insn) == 0x0) + pc = *npc, offset = 4; + if (X_A (insn)) + *npc = 0; + + gdb_assert (offset != 0); + return pc + offset; } - else - internal_error (__FILE__, __LINE__, "\ -Cannot extract floating-point return value of %d bytes long.", len); } - /* Add leading zeros to the value. */ - memset (buf, 0, sizeof buf); - - if (len <= 4) - { - memcpy (buf + 4 - len, valbuf, len); - regcache_cooked_write (regcache, SPARC_O0_REGNUM, buf); - } - else if (len <= 8) - { - memcpy (buf + 8 - len, valbuf, len); - regcache_cooked_write (regcache, SPARC_O0_REGNUM, buf); - regcache_cooked_write (regcache, SPARC_O1_REGNUM, buf); - } - else - internal_error (__FILE__, __LINE__, - "Cannot extract return value of %d bytes long.", len); + return 0; } -/* Extract from REGCACHE the address in which a function should return - its structure value. */ - -CORE_ADDR -sparc_extract_struct_value_address (struct regcache *regcache) +void +sparc_software_single_step (enum target_signal sig, int insert_breakpoints_p) { - ULONGEST addr; + struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); + static CORE_ADDR npc, nnpc; + static char npc_save[4], nnpc_save[4]; - regcache_cooked_read_unsigned (regcache, SPARC_O0_REGNUM, &addr); - return addr; -} + if (insert_breakpoints_p) + { + CORE_ADDR pc; -/* FIXME: kettenis/2003/05/24: Still used for sparc64. */ + pc = sparc_address_from_register (tdep->pc_regnum); + npc = sparc_address_from_register (tdep->npc_regnum); -static void -sparc_store_return_value (struct type *type, char *valbuf) -{ - int regno; - char buffer[MAX_REGISTER_SIZE]; + /* Analyze the instruction at PC. */ + nnpc = sparc_analyze_control_transfer (pc, &npc); + if (npc != 0) + target_insert_breakpoint (npc, npc_save); + if (nnpc != 0) + target_insert_breakpoint (nnpc, nnpc_save); - if (TYPE_CODE (type) == TYPE_CODE_FLT && SPARC_HAS_FPU) - /* Floating-point values are returned in the register pair */ - /* formed by %f0 and %f1 (doubles are, anyway). */ - regno = FP0_REGNUM; + /* Assert that we have set at least one breakpoint, and that + they're not set at the same spot. */ + gdb_assert (npc != 0 || nnpc != 0); + gdb_assert (nnpc != npc); + } else - /* Other values are returned in register %o0. */ - regno = O0_REGNUM; - - /* Add leading zeros to the value. */ - if (TYPE_LENGTH (type) < DEPRECATED_REGISTER_RAW_SIZE (regno)) { - memset (buffer, 0, DEPRECATED_REGISTER_RAW_SIZE (regno)); - memcpy (buffer + DEPRECATED_REGISTER_RAW_SIZE (regno) - TYPE_LENGTH (type), valbuf, - TYPE_LENGTH (type)); - deprecated_write_register_gen (regno, buffer); + if (npc != 0) + target_remove_breakpoint (npc, npc_save); + if (nnpc != 0) + target_remove_breakpoint (nnpc, nnpc_save); } - else - deprecated_write_register_bytes (DEPRECATED_REGISTER_BYTE (regno), valbuf, - TYPE_LENGTH (type)); } -#ifndef CALL_DUMMY_CALL_OFFSET -#define CALL_DUMMY_CALL_OFFSET \ - (gdbarch_tdep (current_gdbarch)->call_dummy_call_offset) -#endif /* CALL_DUMMY_CALL_OFFSET */ - -/* Insert the function address into a call dummy instruction sequence - stored at DUMMY. +static void +sparc_write_pc (CORE_ADDR pc, ptid_t ptid) +{ + struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); - For structs and unions, if the function was compiled with Sun cc, - it expects 'unimp' after the call. But gcc doesn't use that - (twisted) convention. So leave a nop there for gcc - (DEPRECATED_FIX_CALL_DUMMY can assume it is operating on a pristine - CALL_DUMMY, not one that has already been customized for a - different function). */ + write_register_pid (tdep->pc_regnum, pc, ptid); + write_register_pid (tdep->npc_regnum, pc + 4, ptid); +} + +/* Unglobalize NAME. */ -void -sparc_fix_call_dummy (char *dummy, CORE_ADDR pc, CORE_ADDR fun, - struct type *value_type, int using_gcc) -{ - int i; +char * +sparc_stabs_unglobalize_name (char *name) +{ + /* The Sun compilers (Sun ONE Studio, Forte Developer, Sun WorkShop, + SunPRO) convert file static variables into global values, a + process known as globalization. In order to do this, the + compiler will create a unique prefix and prepend it to each file + static variable. For static variables within a function, this + globalization prefix is followed by the function name (nested + static variables within a function are supposed to generate a + warning message, and are left alone). The procedure is + documented in the Stabs Interface Manual, which is distrubuted + with the compilers, although version 4.0 of the manual seems to + be incorrect in some places, at least for SPARC. The + globalization prefix is encoded into an N_OPT stab, with the form + "G=<prefix>". The globalization prefix always seems to start + with a dollar sign '$'; a dot '.' is used as a seperator. So we + simply strip everything up until the last dot. */ - /* Store the relative adddress of the target function into the - 'call' instruction. */ - store_unsigned_integer (dummy + CALL_DUMMY_CALL_OFFSET, 4, - (0x40000000 - | (((fun - (pc + CALL_DUMMY_CALL_OFFSET)) >> 2) - & 0x3fffffff))); - - /* If the called function returns an aggregate value, fill in the UNIMP - instruction containing the size of the returned aggregate return value, - which follows the call instruction. - For details see the SPARC Architecture Manual Version 8, Appendix D.3. - - Adjust the call_dummy_breakpoint_offset for the bp_call_dummy breakpoint - to the proper address in the call dummy, so that `finish' after a stop - in a call dummy works. - - Tweeking current_gdbarch is not an optimal solution, but the call - to sparc_fix_call_dummy is immediately followed by a call to - call_function_by_hand, which is the only function where - dummy_breakpoint_offset is actually used, if it is non-zero. */ - if (TYPE_CODE (value_type) == TYPE_CODE_STRUCT - || TYPE_CODE (value_type) == TYPE_CODE_UNION) + if (name[0] == '$') { - store_unsigned_integer (dummy + CALL_DUMMY_CALL_OFFSET + 8, 4, - TYPE_LENGTH (value_type) & 0x1fff); - set_gdbarch_deprecated_call_dummy_breakpoint_offset (current_gdbarch, 0x30); + char *p = strrchr (name, '.'); + if (p) + return p + 1; } - else - set_gdbarch_deprecated_call_dummy_breakpoint_offset (current_gdbarch, 0x2c); - if (!(GDB_TARGET_IS_SPARC64)) - { - /* If this is not a simulator target, change the first four - instructions of the call dummy to NOPs. Those instructions - include a 'save' instruction and are designed to work around - problems with register window flushing in the simulator. */ - - if (strcmp (target_shortname, "sim") != 0) - { - for (i = 0; i < 4; i++) - store_unsigned_integer (dummy + (i * 4), 4, 0x01000000); - } - } + return name; } + -/* - * Module "constructor" function. - */ - -static struct gdbarch * sparc_gdbarch_init (struct gdbarch_info info, - struct gdbarch_list *arches); -static void sparc_dump_tdep (struct gdbarch *, struct ui_file *); - -extern initialize_file_ftype _initialize_sparc_tdep; /* -Wmissing-prototypes */ +/* Return the appropriate register set for the core section identified + by SECT_NAME and SECT_SIZE. */ -void -_initialize_sparc_tdep (void) +const struct regset * +sparc_regset_from_core_section (struct gdbarch *gdbarch, + const char *sect_name, size_t sect_size) { - /* Hook us into the gdbarch mechanism. */ - gdbarch_register (bfd_arch_sparc, sparc_gdbarch_init, sparc_dump_tdep); -} + struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); -/* Compensate for stack bias. Note that we currently don't handle - mixed 32/64 bit code. */ + if (strcmp (sect_name, ".reg") == 0 && sect_size >= tdep->sizeof_gregset) + return tdep->gregset; -static CORE_ADDR -sparc64_read_sp (void) -{ - CORE_ADDR sp = read_register (SP_REGNUM); + if (strcmp (sect_name, ".reg2") == 0 && sect_size >= tdep->sizeof_fpregset) + return tdep->fpregset; - if (sp & 1) - sp += 2047; - return sp; + return NULL; } + -static CORE_ADDR -sparc64_read_fp (void) +static struct gdbarch * +sparc32_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) { - CORE_ADDR fp = read_register (DEPRECATED_FP_REGNUM); + struct gdbarch_tdep *tdep; + struct gdbarch *gdbarch; - if (fp & 1) - fp += 2047; - return fp; -} + /* If there is already a candidate, use it. */ + arches = gdbarch_list_lookup_by_info (arches, &info); + if (arches != NULL) + return arches->gdbarch; -static void -sparc64_write_sp (CORE_ADDR val) -{ - CORE_ADDR oldsp = read_register (SP_REGNUM); - if (oldsp & 1) - write_register (SP_REGNUM, val - 2047); - else - write_register (SP_REGNUM, val); -} + /* Allocate space for the new architecture. */ + tdep = XMALLOC (struct gdbarch_tdep); + gdbarch = gdbarch_alloc (&info, tdep); -/* The SPARC 64 ABI passes floating-point arguments in FP0 to FP31, - and all other arguments in O0 to O5. They are also copied onto - the stack in the correct places. Apparently (empirically), - structs of less than 16 bytes are passed member-by-member in - separate registers, but I am unable to figure out the algorithm. - Some members go in floating point regs, but I don't know which. + tdep->pc_regnum = SPARC32_PC_REGNUM; + tdep->npc_regnum = SPARC32_NPC_REGNUM; + tdep->gregset = NULL; + tdep->sizeof_gregset = 0; + tdep->fpregset = NULL; + tdep->sizeof_fpregset = 0; + tdep->plt_entry_size = 0; + + set_gdbarch_long_double_bit (gdbarch, 128); + set_gdbarch_long_double_format (gdbarch, &floatformat_sparc_quad); + + set_gdbarch_num_regs (gdbarch, SPARC32_NUM_REGS); + set_gdbarch_register_name (gdbarch, sparc32_register_name); + set_gdbarch_register_type (gdbarch, sparc32_register_type); + set_gdbarch_num_pseudo_regs (gdbarch, SPARC32_NUM_PSEUDO_REGS); + set_gdbarch_pseudo_register_read (gdbarch, sparc32_pseudo_register_read); + set_gdbarch_pseudo_register_write (gdbarch, sparc32_pseudo_register_write); + + /* Register numbers of various important registers. */ + set_gdbarch_sp_regnum (gdbarch, SPARC_SP_REGNUM); /* %sp */ + set_gdbarch_pc_regnum (gdbarch, SPARC32_PC_REGNUM); /* %pc */ + set_gdbarch_fp0_regnum (gdbarch, SPARC_F0_REGNUM); /* %f0 */ + + /* Call dummy code. */ + set_gdbarch_call_dummy_location (gdbarch, ON_STACK); + set_gdbarch_push_dummy_code (gdbarch, sparc32_push_dummy_code); + set_gdbarch_push_dummy_call (gdbarch, sparc32_push_dummy_call); + + set_gdbarch_return_value (gdbarch, sparc32_return_value); + set_gdbarch_stabs_argument_has_addr + (gdbarch, sparc32_stabs_argument_has_addr); + + set_gdbarch_skip_prologue (gdbarch, sparc32_skip_prologue); + + /* Stack grows downward. */ + set_gdbarch_inner_than (gdbarch, core_addr_lessthan); - FIXME: Handle small structs (less than 16 bytes containing floats). + set_gdbarch_breakpoint_from_pc (gdbarch, sparc_breakpoint_from_pc); - The counting regimen for using both integer and FP registers - for argument passing is rather odd -- a single counter is used - for both; this means that if the arguments alternate between - int and float, we will waste every other register of both types. */ + set_gdbarch_frame_args_skip (gdbarch, 8); -static CORE_ADDR -sparc64_push_arguments (int nargs, struct value **args, CORE_ADDR sp, - int struct_return, CORE_ADDR struct_retaddr) -{ - int i, j, register_counter = 0; - CORE_ADDR tempsp; - struct type *sparc_intreg_type = - TYPE_LENGTH (builtin_type_long) == SPARC_INTREG_SIZE ? - builtin_type_long : builtin_type_long_long; + set_gdbarch_print_insn (gdbarch, print_insn_sparc); - sp = (sp & ~(((unsigned long) SPARC_INTREG_SIZE) - 1UL)); + set_gdbarch_software_single_step (gdbarch, sparc_software_single_step); + set_gdbarch_write_pc (gdbarch, sparc_write_pc); - /* Figure out how much space we'll need. */ - for (i = nargs - 1; i >= 0; i--) - { - int len = TYPE_LENGTH (check_typedef (VALUE_TYPE (args[i]))); - struct value *copyarg = args[i]; - int copylen = len; + set_gdbarch_unwind_dummy_id (gdbarch, sparc_unwind_dummy_id); - if (copylen < SPARC_INTREG_SIZE) - { - copyarg = value_cast (sparc_intreg_type, copyarg); - copylen = SPARC_INTREG_SIZE; - } - sp -= copylen; - } + set_gdbarch_unwind_pc (gdbarch, sparc_unwind_pc); - /* Round down. */ - sp = sp & ~7; - tempsp = sp; + frame_base_set_default (gdbarch, &sparc32_frame_base); - /* if STRUCT_RETURN, then first argument is the struct return location. */ - if (struct_return) - write_register (O0_REGNUM + register_counter++, struct_retaddr); + /* Hook in ABI-specific overrides, if they have been registered. */ + gdbarch_init_osabi (info, gdbarch); - /* Now write the arguments onto the stack, while writing FP - arguments into the FP registers, and other arguments into the - first six 'O' registers. */ + frame_unwind_append_sniffer (gdbarch, sparc32_frame_sniffer); - for (i = 0; i < nargs; i++) - { - int len = TYPE_LENGTH (check_typedef (VALUE_TYPE (args[i]))); - struct value *copyarg = args[i]; - enum type_code typecode = TYPE_CODE (VALUE_TYPE (args[i])); - int copylen = len; - - if (typecode == TYPE_CODE_INT || - typecode == TYPE_CODE_BOOL || - typecode == TYPE_CODE_CHAR || - typecode == TYPE_CODE_RANGE || - typecode == TYPE_CODE_ENUM) - if (len < SPARC_INTREG_SIZE) - { - /* Small ints will all take up the size of one intreg on - the stack. */ - copyarg = value_cast (sparc_intreg_type, copyarg); - copylen = SPARC_INTREG_SIZE; - } - - write_memory (tempsp, VALUE_CONTENTS (copyarg), copylen); - tempsp += copylen; - - /* Corner case: Structs consisting of a single float member are floats. - * FIXME! I don't know about structs containing multiple floats! - * Structs containing mixed floats and ints are even more weird. - */ - - - - /* Separate float args from all other args. */ - if (typecode == TYPE_CODE_FLT && SPARC_HAS_FPU) - { - if (register_counter < 16) - { - /* This arg gets copied into a FP register. */ - int fpreg; - - switch (len) { - case 4: /* Single-precision (float) */ - fpreg = FP0_REGNUM + 2 * register_counter + 1; - register_counter += 1; - break; - case 8: /* Double-precision (double) */ - fpreg = FP0_REGNUM + 2 * register_counter; - register_counter += 1; - break; - case 16: /* Quad-precision (long double) */ - fpreg = FP0_REGNUM + 2 * register_counter; - register_counter += 2; - break; - default: - internal_error (__FILE__, __LINE__, "bad switch"); - } - deprecated_write_register_bytes (DEPRECATED_REGISTER_BYTE (fpreg), - VALUE_CONTENTS (args[i]), - len); - } - } - else /* all other args go into the first six 'o' registers */ - { - for (j = 0; - j < len && register_counter < 6; - j += SPARC_INTREG_SIZE) - { - int oreg = O0_REGNUM + register_counter; + /* If we have register sets, enable the generic core file support. */ + if (tdep->gregset) + set_gdbarch_regset_from_core_section (gdbarch, + sparc_regset_from_core_section); - deprecated_write_register_gen (oreg, VALUE_CONTENTS (copyarg) + j); - register_counter += 1; - } - } - } - return sp; + return gdbarch; } + +/* Helper functions for dealing with register windows. */ -/* Values <= 32 bytes are returned in o0-o3 (floating-point values are - returned in f0-f3). */ - -static void -sp64_extract_return_value (struct type *type, char *regbuf, char *valbuf, - int bitoffset) +void +sparc_supply_rwindow (struct regcache *regcache, CORE_ADDR sp, int regnum) { - int typelen = TYPE_LENGTH (type); - int regsize = DEPRECATED_REGISTER_RAW_SIZE (O0_REGNUM); + int offset = 0; + char buf[8]; + int i; - if (TYPE_CODE (type) == TYPE_CODE_FLT && SPARC_HAS_FPU) + if (sp & 1) { - memcpy (valbuf, ®buf[DEPRECATED_REGISTER_BYTE (FP0_REGNUM)], typelen); - return; - } + /* Registers are 64-bit. */ + sp += BIAS; - if (TYPE_CODE (type) != TYPE_CODE_STRUCT - || (TYPE_LENGTH (type) > 32)) - { - memcpy (valbuf, - ®buf[O0_REGNUM * regsize + - (typelen >= regsize ? 0 : regsize - typelen)], - typelen); - return; + for (i = SPARC_L0_REGNUM; i <= SPARC_I7_REGNUM; i++) + { + if (regnum == i || regnum == -1) + { + target_read_memory (sp + ((i - SPARC_L0_REGNUM) * 8), buf, 8); + regcache_raw_supply (regcache, i, buf); + } + } } else { - char *o0 = ®buf[O0_REGNUM * regsize]; - char *f0 = ®buf[FP0_REGNUM * regsize]; - int x; + /* Registers are 32-bit. Toss any sign-extension of the stack + pointer. */ + sp &= 0xffffffffUL; - for (x = 0; x < TYPE_NFIELDS (type); x++) + /* Clear out the top half of the temporary buffer, and put the + register value in the bottom half if we're in 64-bit mode. */ + if (gdbarch_ptr_bit (current_gdbarch) == 64) { - struct field *f = &TYPE_FIELDS (type)[x]; - /* FIXME: We may need to handle static fields here. */ - int whichreg = (f->loc.bitpos + bitoffset) / 32; - int remainder = ((f->loc.bitpos + bitoffset) % 32) / 8; - int where = (f->loc.bitpos + bitoffset) / 8; - int size = TYPE_LENGTH (f->type); - int typecode = TYPE_CODE (f->type); - - if (typecode == TYPE_CODE_STRUCT) - { - sp64_extract_return_value (f->type, - regbuf, - valbuf, - bitoffset + f->loc.bitpos); - } - else if (typecode == TYPE_CODE_FLT && SPARC_HAS_FPU) - { - memcpy (valbuf + where, &f0[whichreg * 4] + remainder, size); - } - else + memset (buf, 0, 4); + offset = 4; + } + + for (i = SPARC_L0_REGNUM; i <= SPARC_I7_REGNUM; i++) + { + if (regnum == i || regnum == -1) { - memcpy (valbuf + where, &o0[whichreg * 4] + remainder, size); + target_read_memory (sp + ((i - SPARC_L0_REGNUM) * 4), + buf + offset, 4); + regcache_raw_supply (regcache, i, buf); } } } } -static void -sparc64_extract_return_value (struct type *type, char *regbuf, char *valbuf) -{ - sp64_extract_return_value (type, regbuf, valbuf, 0); -} - -extern CORE_ADDR -sparc32_stack_align (CORE_ADDR addr) -{ - return ((addr + 7) & -8); -} - -static CORE_ADDR -sparc64_stack_align (CORE_ADDR addr) -{ - return ((addr + 15) & -16); -} - -extern void -sparc_print_extra_frame_info (struct frame_info *fi) +void +sparc_collect_rwindow (const struct regcache *regcache, + CORE_ADDR sp, int regnum) { - if (fi && get_frame_extra_info (fi) && get_frame_extra_info (fi)->flat) - printf_filtered (" flat, pc saved at 0x%s, fp saved at 0x%s\n", - paddr_nz (get_frame_extra_info (fi)->pc_addr), - paddr_nz (get_frame_extra_info (fi)->fp_addr)); -} + int offset = 0; + char buf[8]; + int i; -static const char * -sparc32_register_name (int regno) -{ - static char *register_names[] = - { "g0", "g1", "g2", "g3", "g4", "g5", "g6", "g7", - "o0", "o1", "o2", "o3", "o4", "o5", "sp", "o7", - "l0", "l1", "l2", "l3", "l4", "l5", "l6", "l7", - "i0", "i1", "i2", "i3", "i4", "i5", "fp", "i7", - - "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", - "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", - "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23", - "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31", - - "y", "psr", "wim", "tbr", "pc", "npc", "fpsr", "cpsr" - }; - - if (regno < 0 || - regno >= (sizeof (register_names) / sizeof (register_names[0]))) - return NULL; - else - return register_names[regno]; -} + if (sp & 1) + { + /* Registers are 64-bit. */ + sp += BIAS; -static const char * -sparc64_register_name (int regno) -{ - static char *register_names[] = - { "g0", "g1", "g2", "g3", "g4", "g5", "g6", "g7", - "o0", "o1", "o2", "o3", "o4", "o5", "sp", "o7", - "l0", "l1", "l2", "l3", "l4", "l5", "l6", "l7", - "i0", "i1", "i2", "i3", "i4", "i5", "fp", "i7", - - "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", - "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", - "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23", - "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31", - "f32", "f34", "f36", "f38", "f40", "f42", "f44", "f46", - "f48", "f50", "f52", "f54", "f56", "f58", "f60", "f62", - - "pc", "npc", "ccr", "fsr", "fprs", "y", "asi", "ver", - "tick", "pil", "pstate", "tstate", "tba", "tl", "tt", "tpc", - "tnpc", "wstate", "cwp", "cansave", "canrestore", "cleanwin", "otherwin", - "asr16", "asr17", "asr18", "asr19", "asr20", "asr21", "asr22", "asr23", - "asr24", "asr25", "asr26", "asr27", "asr28", "asr29", "asr30", "asr31", - /* These are here at the end to simplify removing them if we have to. */ - "icc", "xcc", "fcc0", "fcc1", "fcc2", "fcc3" - }; - - if (regno < 0 || - regno >= (sizeof (register_names) / sizeof (register_names[0]))) - return NULL; + for (i = SPARC_L0_REGNUM; i <= SPARC_I7_REGNUM; i++) + { + if (regnum == -1 || regnum == SPARC_SP_REGNUM || regnum == i) + { + regcache_raw_collect (regcache, i, buf); + target_write_memory (sp + ((i - SPARC_L0_REGNUM) * 8), buf, 8); + } + } + } else - return register_names[regno]; -} - -static CORE_ADDR -sparc_push_return_address (CORE_ADDR pc_unused, CORE_ADDR sp) -{ - if (CALL_DUMMY_LOCATION == AT_ENTRY_POINT) { - /* The return PC of the dummy_frame is the former 'current' PC - (where we were before we made the target function call). - This is saved in %i7 by push_dummy_frame. + /* Registers are 32-bit. Toss any sign-extension of the stack + pointer. */ + sp &= 0xffffffffUL; - We will save the 'call dummy location' (ie. the address - to which the target function will return) in %o7. - This address will actually be the program's entry point. - There will be a special call_dummy breakpoint there. */ + /* Only use the bottom half if we're in 64-bit mode. */ + if (gdbarch_ptr_bit (current_gdbarch) == 64) + offset = 4; - if (DEPRECATED_CALL_DUMMY_ADDRESS_P ()) - write_register (O7_REGNUM, DEPRECATED_CALL_DUMMY_ADDRESS () - 8); - else - write_register (O7_REGNUM, entry_point_address () - 8); + for (i = SPARC_L0_REGNUM; i <= SPARC_I7_REGNUM; i++) + { + if (regnum == -1 || regnum == SPARC_SP_REGNUM || regnum == i) + { + regcache_raw_collect (regcache, i, buf); + target_write_memory (sp + ((i - SPARC_L0_REGNUM) * 4), + buf + offset, 4); + } + } } - - return sp; } -/* Should call_function allocate stack space for a struct return? */ +/* Helper functions for dealing with register sets. */ -static int -sparc64_use_struct_convention (int gcc_p, struct type *type) +void +sparc32_supply_gregset (const struct sparc_gregset *gregset, + struct regcache *regcache, + int regnum, const void *gregs) { - return (TYPE_LENGTH (type) > 32); -} + const char *regs = gregs; + int i; -/* Store the address of the place in which to copy the structure the - subroutine will return. This is called from call_function_by_hand. - The ultimate mystery is, tho, what is the value "16"? + if (regnum == SPARC32_PSR_REGNUM || regnum == -1) + regcache_raw_supply (regcache, SPARC32_PSR_REGNUM, + regs + gregset->r_psr_offset); - MVS: That's the offset from where the sp is now, to where the - subroutine is gonna expect to find the struct return address. */ + if (regnum == SPARC32_PC_REGNUM || regnum == -1) + regcache_raw_supply (regcache, SPARC32_PC_REGNUM, + regs + gregset->r_pc_offset); -static void -sparc32_store_struct_return (CORE_ADDR addr, CORE_ADDR sp) -{ - char *val; - CORE_ADDR o7; + if (regnum == SPARC32_NPC_REGNUM || regnum == -1) + regcache_raw_supply (regcache, SPARC32_NPC_REGNUM, + regs + gregset->r_npc_offset); - val = alloca (SPARC_INTREG_SIZE); - store_unsigned_integer (val, SPARC_INTREG_SIZE, addr); - write_memory (sp + (16 * SPARC_INTREG_SIZE), val, SPARC_INTREG_SIZE); + if (regnum == SPARC32_Y_REGNUM || regnum == -1) + regcache_raw_supply (regcache, SPARC32_Y_REGNUM, + regs + gregset->r_y_offset); - if (CALL_DUMMY_LOCATION == AT_ENTRY_POINT) - { - /* Now adjust the value of the link register, which was previously - stored by push_return_address. Functions that return structs are - peculiar in that they return to link register + 12, rather than - link register + 8. */ + if (regnum == SPARC_G0_REGNUM || regnum == -1) + regcache_raw_supply (regcache, SPARC_G0_REGNUM, NULL); - o7 = read_register (O7_REGNUM); - write_register (O7_REGNUM, o7 - 4); - } -} - -static void -sparc64_store_struct_return (CORE_ADDR addr, CORE_ADDR sp) -{ - /* FIXME: V9 uses %o0 for this. */ - /* FIXME MVS: Only for small enough structs!!! */ - - target_write_memory (sp + (16 * SPARC_INTREG_SIZE), - (char *) &addr, SPARC_INTREG_SIZE); -#if 0 - if (CALL_DUMMY_LOCATION == AT_ENTRY_POINT) + if ((regnum >= SPARC_G1_REGNUM && regnum <= SPARC_O7_REGNUM) || regnum == -1) { - /* Now adjust the value of the link register, which was previously - stored by push_return_address. Functions that return structs are - peculiar in that they return to link register + 12, rather than - link register + 8. */ + int offset = gregset->r_g1_offset; - write_register (O7_REGNUM, read_register (O7_REGNUM) - 4); + for (i = SPARC_G1_REGNUM; i <= SPARC_O7_REGNUM; i++) + { + if (regnum == i || regnum == -1) + regcache_raw_supply (regcache, i, regs + offset); + offset += 4; + } } -#endif -} -/* Default target data type for register REGNO. */ - -static struct type * -sparc32_register_virtual_type (int regno) -{ - if (regno == PC_REGNUM || - regno == DEPRECATED_FP_REGNUM || - regno == SP_REGNUM) - return builtin_type_unsigned_int; - if (regno < 32) - return builtin_type_int; - if (regno < 64) - return builtin_type_float; - return builtin_type_int; -} - -static struct type * -sparc64_register_virtual_type (int regno) -{ - if (regno == PC_REGNUM || - regno == DEPRECATED_FP_REGNUM || - regno == SP_REGNUM) - return builtin_type_unsigned_long_long; - if (regno < 32) - return builtin_type_long_long; - if (regno < 64) - return builtin_type_float; - if (regno < 80) - return builtin_type_double; - return builtin_type_long_long; -} - -/* Number of bytes of storage in the actual machine representation for - register REGNO. */ - -static int -sparc32_register_size (int regno) -{ - return 4; -} - -static int -sparc64_register_size (int regno) -{ - return (regno < 32 ? 8 : regno < 64 ? 4 : 8); -} - -/* Index within the `registers' buffer of the first byte of the space - for register REGNO. */ - -static int -sparc32_register_byte (int regno) -{ - return (regno * 4); -} - -static int -sparc64_register_byte (int regno) -{ - if (regno < 32) - return regno * 8; - else if (regno < 64) - return 32 * 8 + (regno - 32) * 4; - else if (regno < 80) - return 32 * 8 + 32 * 4 + (regno - 64) * 8; - else - return 64 * 8 + (regno - 80) * 8; -} - -/* Immediately after a function call, return the saved pc. - Can't go through the frames for this because on some machines - the new frame is not set up until the new function executes - some instructions. */ - -static CORE_ADDR -sparc_saved_pc_after_call (struct frame_info *fi) -{ - return sparc_pc_adjust (read_register (RP_REGNUM)); -} + if ((regnum >= SPARC_L0_REGNUM && regnum <= SPARC_I7_REGNUM) || regnum == -1) + { + /* Not all of the register set variants include Locals and + Inputs. For those that don't, we read them off the stack. */ + if (gregset->r_l0_offset == -1) + { + ULONGEST sp; -/* Init saved regs: nothing to do, just a place-holder function. */ + regcache_cooked_read_unsigned (regcache, SPARC_SP_REGNUM, &sp); + sparc_supply_rwindow (regcache, sp, regnum); + } + else + { + int offset = gregset->r_l0_offset; -static void -sparc_frame_init_saved_regs (struct frame_info *fi_ignored) -{ /* no-op */ + for (i = SPARC_L0_REGNUM; i <= SPARC_I7_REGNUM; i++) + { + if (regnum == i || regnum == -1) + regcache_raw_supply (regcache, i, regs + offset); + offset += 4; + } + } + } } -/* gdbarch fix call dummy: - All this function does is rearrange the arguments before calling - sparc_fix_call_dummy (which does the real work). */ - -static void -sparc_gdbarch_fix_call_dummy (char *dummy, - CORE_ADDR pc, - CORE_ADDR fun, - int nargs, - struct value **args, - struct type *type, - int gcc_p) +void +sparc32_collect_gregset (const struct sparc_gregset *gregset, + const struct regcache *regcache, + int regnum, void *gregs) { - if (CALL_DUMMY_LOCATION == ON_STACK) - sparc_fix_call_dummy (dummy, pc, fun, type, gcc_p); -} + char *regs = gregs; + int i; -/* DEPRECATED_CALL_DUMMY_ADDRESS: fetch the breakpoint address for a - call dummy. */ + if (regnum == SPARC32_PSR_REGNUM || regnum == -1) + regcache_raw_collect (regcache, SPARC32_PSR_REGNUM, + regs + gregset->r_psr_offset); -static CORE_ADDR -sparc_call_dummy_address (void) -{ - return (DEPRECATED_CALL_DUMMY_START_OFFSET) + DEPRECATED_CALL_DUMMY_BREAKPOINT_OFFSET; -} + if (regnum == SPARC32_PC_REGNUM || regnum == -1) + regcache_raw_collect (regcache, SPARC32_PC_REGNUM, + regs + gregset->r_pc_offset); -/* Supply the Y register number to those that need it. */ + if (regnum == SPARC32_NPC_REGNUM || regnum == -1) + regcache_raw_collect (regcache, SPARC32_NPC_REGNUM, + regs + gregset->r_npc_offset); -int -sparc_y_regnum (void) -{ - return gdbarch_tdep (current_gdbarch)->y_regnum; -} + if (regnum == SPARC32_Y_REGNUM || regnum == -1) + regcache_raw_collect (regcache, SPARC32_Y_REGNUM, + regs + gregset->r_y_offset); -int -sparc_reg_struct_has_addr (int gcc_p, struct type *type) -{ - if (GDB_TARGET_IS_SPARC64) - return (TYPE_LENGTH (type) > 32); - else - return (gcc_p != 1); -} + if ((regnum >= SPARC_G1_REGNUM && regnum <= SPARC_O7_REGNUM) || regnum == -1) + { + int offset = gregset->r_g1_offset; -int -sparc_intreg_size (void) -{ - return SPARC_INTREG_SIZE; -} + /* %g0 is always zero. */ + for (i = SPARC_G1_REGNUM; i <= SPARC_O7_REGNUM; i++) + { + if (regnum == i || regnum == -1) + regcache_raw_collect (regcache, i, regs + offset); + offset += 4; + } + } -static int -sparc_return_value_on_stack (struct type *type) -{ - if (TYPE_CODE (type) == TYPE_CODE_FLT && - TYPE_LENGTH (type) > 8) - return 1; - else - return 0; -} + if ((regnum >= SPARC_L0_REGNUM && regnum <= SPARC_I7_REGNUM) || regnum == -1) + { + /* Not all of the register set variants include Locals and + Inputs. For those that don't, we read them off the stack. */ + if (gregset->r_l0_offset != -1) + { + int offset = gregset->r_l0_offset; -/* Get the ith function argument for the current function. */ -static CORE_ADDR -sparc_fetch_pointer_argument (struct frame_info *frame, int argi, - struct type *type) -{ - CORE_ADDR addr; - get_frame_register (frame, O0_REGNUM + argi, &addr); - return addr; + for (i = SPARC_L0_REGNUM; i <= SPARC_I7_REGNUM; i++) + { + if (regnum == i || regnum == -1) + regcache_raw_collect (regcache, i, regs + offset); + offset += 4; + } + } + } } -/* - * Gdbarch "constructor" function. - */ - -#define SPARC32_CALL_DUMMY_ON_STACK - -#define SPARC_SP_REGNUM 14 -#define SPARC_FP_REGNUM 30 -#define SPARC_FP0_REGNUM 32 -#define SPARC32_NPC_REGNUM 69 -#define SPARC32_PC_REGNUM 68 -#define SPARC32_Y_REGNUM 64 -#define SPARC64_PC_REGNUM 80 -#define SPARC64_NPC_REGNUM 81 -#define SPARC64_Y_REGNUM 85 - -static struct gdbarch * -sparc_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) +void +sparc32_supply_fpregset (struct regcache *regcache, + int regnum, const void *fpregs) { - struct gdbarch *gdbarch; - struct gdbarch_tdep *tdep; + const char *regs = fpregs; + int i; - static LONGEST call_dummy_32[] = - { 0xbc100001, 0x9de38000, 0xbc100002, 0xbe100003, - 0xda03a058, 0xd803a054, 0xd603a050, 0xd403a04c, - 0xd203a048, 0x40000000, 0xd003a044, 0x01000000, - 0x91d02001, 0x01000000 - }; - static LONGEST call_dummy_64[] = - { 0x9de3bec0fd3fa7f7LL, 0xf93fa7eff53fa7e7LL, - 0xf13fa7dfed3fa7d7LL, 0xe93fa7cfe53fa7c7LL, - 0xe13fa7bfdd3fa7b7LL, 0xd93fa7afd53fa7a7LL, - 0xd13fa79fcd3fa797LL, 0xc93fa78fc53fa787LL, - 0xc13fa77fcc3fa777LL, 0xc83fa76fc43fa767LL, - 0xc03fa75ffc3fa757LL, 0xf83fa74ff43fa747LL, - 0xf03fa73f01000000LL, 0x0100000001000000LL, - 0x0100000091580000LL, 0xd027a72b93500000LL, - 0xd027a72791480000LL, 0xd027a72391400000LL, - 0xd027a71fda5ba8a7LL, 0xd85ba89fd65ba897LL, - 0xd45ba88fd25ba887LL, 0x9fc02000d05ba87fLL, - 0x0100000091d02001LL, 0x0100000001000000LL - }; - static LONGEST call_dummy_nil[] = {0}; - - /* Try to determine the OS ABI of the object we are loading. */ - - if (info.abfd != NULL - && info.osabi == GDB_OSABI_UNKNOWN) + for (i = 0; i < 32; i++) { - /* If it's an ELF file, assume it's Solaris. */ - if (bfd_get_flavour (info.abfd) == bfd_target_elf_flavour) - info.osabi = GDB_OSABI_SOLARIS; + if (regnum == (SPARC_F0_REGNUM + i) || regnum == -1) + regcache_raw_supply (regcache, SPARC_F0_REGNUM + i, regs + (i * 4)); } - /* First see if there is already a gdbarch that can satisfy the request. */ - arches = gdbarch_list_lookup_by_info (arches, &info); - if (arches != NULL) - return arches->gdbarch; - - /* None found: is the request for a sparc architecture? */ - if (info.bfd_arch_info->arch != bfd_arch_sparc) - return NULL; /* No; then it's not for us. */ - - /* Yes: create a new gdbarch for the specified machine type. */ - tdep = (struct gdbarch_tdep *) xmalloc (sizeof (struct gdbarch_tdep)); - gdbarch = gdbarch_alloc (&info, tdep); - - /* First set settings that are common for all sparc architectures. */ - set_gdbarch_believe_pcc_promotion (gdbarch, 1); - set_gdbarch_breakpoint_from_pc (gdbarch, sparc_breakpoint_from_pc); - set_gdbarch_decr_pc_after_break (gdbarch, 0); - set_gdbarch_double_bit (gdbarch, 8 * TARGET_CHAR_BIT); - set_gdbarch_extract_struct_value_address (gdbarch, - sparc_extract_struct_value_address); - set_gdbarch_deprecated_fix_call_dummy (gdbarch, sparc_gdbarch_fix_call_dummy); - set_gdbarch_float_bit (gdbarch, 4 * TARGET_CHAR_BIT); - set_gdbarch_deprecated_fp_regnum (gdbarch, SPARC_FP_REGNUM); - set_gdbarch_fp0_regnum (gdbarch, SPARC_FP0_REGNUM); - set_gdbarch_deprecated_frame_chain (gdbarch, sparc_frame_chain); - set_gdbarch_deprecated_frame_init_saved_regs (gdbarch, sparc_frame_init_saved_regs); - set_gdbarch_deprecated_frame_saved_pc (gdbarch, sparc_frame_saved_pc); - set_gdbarch_frameless_function_invocation (gdbarch, - frameless_look_for_prologue); - set_gdbarch_deprecated_get_saved_register (gdbarch, sparc_get_saved_register); - set_gdbarch_deprecated_init_extra_frame_info (gdbarch, sparc_init_extra_frame_info); - set_gdbarch_inner_than (gdbarch, core_addr_lessthan); - set_gdbarch_int_bit (gdbarch, 4 * TARGET_CHAR_BIT); - set_gdbarch_long_double_bit (gdbarch, 16 * TARGET_CHAR_BIT); - set_gdbarch_long_long_bit (gdbarch, 8 * TARGET_CHAR_BIT); - set_gdbarch_deprecated_max_register_raw_size (gdbarch, 8); - set_gdbarch_deprecated_max_register_virtual_size (gdbarch, 8); - set_gdbarch_deprecated_pop_frame (gdbarch, sparc_pop_frame); - set_gdbarch_deprecated_push_return_address (gdbarch, sparc_push_return_address); - set_gdbarch_deprecated_push_dummy_frame (gdbarch, sparc_push_dummy_frame); - set_gdbarch_deprecated_reg_struct_has_addr - (gdbarch, sparc_reg_struct_has_addr); - set_gdbarch_return_value_on_stack (gdbarch, sparc_return_value_on_stack); - set_gdbarch_deprecated_saved_pc_after_call (gdbarch, sparc_saved_pc_after_call); - set_gdbarch_prologue_frameless_p (gdbarch, sparc_prologue_frameless_p); - set_gdbarch_short_bit (gdbarch, 2 * TARGET_CHAR_BIT); - set_gdbarch_skip_prologue (gdbarch, sparc_skip_prologue); - set_gdbarch_sp_regnum (gdbarch, SPARC_SP_REGNUM); - set_gdbarch_deprecated_use_generic_dummy_frames (gdbarch, 0); - set_gdbarch_write_pc (gdbarch, generic_target_write_pc); - - /* Helper for function argument information. */ - set_gdbarch_fetch_pointer_argument (gdbarch, sparc_fetch_pointer_argument); - - /* - * Settings that depend only on 32/64 bit word size - */ - - switch (info.bfd_arch_info->mach) - { - case bfd_mach_sparc: - case bfd_mach_sparc_v8plus: - case bfd_mach_sparc_v8plusa: - /* 32-bit machine types: */ - -#ifdef SPARC32_CALL_DUMMY_ON_STACK - set_gdbarch_deprecated_pc_in_call_dummy (gdbarch, deprecated_pc_in_call_dummy_on_stack); - set_gdbarch_deprecated_call_dummy_address (gdbarch, sparc_call_dummy_address); - set_gdbarch_deprecated_call_dummy_breakpoint_offset (gdbarch, 0x30); - set_gdbarch_deprecated_call_dummy_length (gdbarch, 0x38); - - /* NOTE: cagney/2003-05-01: Using the just added push_dummy_code - architecture method, it is now possible to implement a - generic dummy frames based inferior function call that stores - the breakpoint (and struct info) on the stack. Further, by - treating a SIGSEG at a breakpoint as equivalent to a SIGTRAP - it is even possible to make this work when the stack is - no-execute. - - NOTE: cagney/2002-04-26: Based from info posted by Peter - Schauer around Oct '99. Briefly, due to aspects of the SPARC - ABI, it isn't possible to use ON_STACK with a strictly - compliant compiler. - - Peter Schauer writes ... - - No, any call from GDB to a user function returning a - struct/union will fail miserably. Try this: - - *NOINDENT* - struct x - { - int a[4]; - }; - - struct x gx; - - struct x - sret () - { - return gx; - } - - main () - { - int i; - for (i = 0; i < 4; i++) - gx.a[i] = i + 1; - gx = sret (); - } - *INDENT* - - Set a breakpoint at the gx = sret () statement, run to it and - issue a `print sret()'. It will not succed with your - approach, and I doubt that continuing the program will work - as well. - - For details of the ABI see the Sparc Architecture Manual. I - have Version 8 (Prentice Hall ISBN 0-13-825001-4) and the - calling conventions for functions returning aggregate values - are explained in Appendix D.3. */ - - set_gdbarch_call_dummy_location (gdbarch, ON_STACK); - set_gdbarch_deprecated_call_dummy_words (gdbarch, call_dummy_32); -#else - set_gdbarch_deprecated_pc_in_call_dummy (gdbarch, deprecated_pc_in_call_dummy_at_entry_point); - set_gdbarch_deprecated_call_dummy_words (gdbarch, call_dummy_nil); -#endif - set_gdbarch_deprecated_call_dummy_stack_adjust (gdbarch, 68); - set_gdbarch_frame_args_skip (gdbarch, 68); - set_gdbarch_function_start_offset (gdbarch, 0); - set_gdbarch_long_bit (gdbarch, 4 * TARGET_CHAR_BIT); - set_gdbarch_deprecated_npc_regnum (gdbarch, SPARC32_NPC_REGNUM); - set_gdbarch_pc_regnum (gdbarch, SPARC32_PC_REGNUM); - set_gdbarch_ptr_bit (gdbarch, 4 * TARGET_CHAR_BIT); - set_gdbarch_deprecated_push_arguments (gdbarch, sparc32_push_arguments); - - set_gdbarch_deprecated_register_byte (gdbarch, sparc32_register_byte); - set_gdbarch_deprecated_register_raw_size (gdbarch, sparc32_register_size); - set_gdbarch_deprecated_register_size (gdbarch, 4); - set_gdbarch_deprecated_register_virtual_size (gdbarch, sparc32_register_size); - set_gdbarch_deprecated_register_virtual_type (gdbarch, sparc32_register_virtual_type); -#ifdef SPARC32_CALL_DUMMY_ON_STACK - set_gdbarch_deprecated_sizeof_call_dummy_words (gdbarch, sizeof (call_dummy_32)); -#else - set_gdbarch_deprecated_sizeof_call_dummy_words (gdbarch, 0); -#endif - set_gdbarch_deprecated_stack_align (gdbarch, sparc32_stack_align); - set_gdbarch_deprecated_extra_stack_alignment_needed (gdbarch, 1); - set_gdbarch_deprecated_store_struct_return (gdbarch, sparc32_store_struct_return); - set_gdbarch_use_struct_convention (gdbarch, - generic_use_struct_convention); - set_gdbarch_deprecated_dummy_write_sp (gdbarch, deprecated_write_sp); - tdep->y_regnum = SPARC32_Y_REGNUM; - tdep->fp_max_regnum = SPARC_FP0_REGNUM + 32; - tdep->intreg_size = 4; - tdep->reg_save_offset = 0x60; - tdep->call_dummy_call_offset = 0x24; - break; - - case bfd_mach_sparc_v9: - case bfd_mach_sparc_v9a: - /* 64-bit machine types: */ - default: /* Any new machine type is likely to be 64-bit. */ - -#ifdef SPARC64_CALL_DUMMY_ON_STACK - set_gdbarch_deprecated_pc_in_call_dummy (gdbarch, deprecated_pc_in_call_dummy_on_stack); - set_gdbarch_deprecated_call_dummy_address (gdbarch, sparc_call_dummy_address); - set_gdbarch_deprecated_call_dummy_breakpoint_offset (gdbarch, 8 * 4); - set_gdbarch_deprecated_call_dummy_length (gdbarch, 192); - set_gdbarch_call_dummy_location (gdbarch, ON_STACK); - set_gdbarch_deprecated_call_dummy_start_offset (gdbarch, 148); - set_gdbarch_deprecated_call_dummy_words (gdbarch, call_dummy_64); -#else - set_gdbarch_deprecated_pc_in_call_dummy (gdbarch, deprecated_pc_in_call_dummy_at_entry_point); - set_gdbarch_deprecated_call_dummy_words (gdbarch, call_dummy_nil); -#endif - set_gdbarch_deprecated_call_dummy_stack_adjust (gdbarch, 128); - set_gdbarch_frame_args_skip (gdbarch, 136); - set_gdbarch_function_start_offset (gdbarch, 0); - set_gdbarch_long_bit (gdbarch, 8 * TARGET_CHAR_BIT); - set_gdbarch_deprecated_npc_regnum (gdbarch, SPARC64_NPC_REGNUM); - set_gdbarch_pc_regnum (gdbarch, SPARC64_PC_REGNUM); - set_gdbarch_ptr_bit (gdbarch, 8 * TARGET_CHAR_BIT); - set_gdbarch_deprecated_push_arguments (gdbarch, sparc64_push_arguments); - /* NOTE different for at_entry */ - set_gdbarch_deprecated_target_read_fp (gdbarch, sparc64_read_fp); - set_gdbarch_read_sp (gdbarch, sparc64_read_sp); - /* Some of the registers aren't 64 bits, but it's a lot simpler just - to assume they all are (since most of them are). */ - set_gdbarch_deprecated_register_byte (gdbarch, sparc64_register_byte); - set_gdbarch_deprecated_register_raw_size (gdbarch, sparc64_register_size); - set_gdbarch_deprecated_register_size (gdbarch, 8); - set_gdbarch_deprecated_register_virtual_size (gdbarch, sparc64_register_size); - set_gdbarch_deprecated_register_virtual_type (gdbarch, sparc64_register_virtual_type); -#ifdef SPARC64_CALL_DUMMY_ON_STACK - set_gdbarch_deprecated_sizeof_call_dummy_words (gdbarch, sizeof (call_dummy_64)); -#else - set_gdbarch_deprecated_sizeof_call_dummy_words (gdbarch, 0); -#endif - set_gdbarch_deprecated_stack_align (gdbarch, sparc64_stack_align); - set_gdbarch_deprecated_extra_stack_alignment_needed (gdbarch, 1); - set_gdbarch_deprecated_store_struct_return (gdbarch, sparc64_store_struct_return); - set_gdbarch_use_struct_convention (gdbarch, - sparc64_use_struct_convention); - set_gdbarch_deprecated_dummy_write_sp (gdbarch, sparc64_write_sp); - tdep->y_regnum = SPARC64_Y_REGNUM; - tdep->fp_max_regnum = SPARC_FP0_REGNUM + 48; - tdep->intreg_size = 8; - tdep->reg_save_offset = 0x90; - tdep->call_dummy_call_offset = 148 + 4 * 5; - break; - } + if (regnum == SPARC32_FSR_REGNUM || regnum == -1) + regcache_raw_supply (regcache, SPARC32_FSR_REGNUM, regs + (32 * 4) + 4); +} - /* - * Settings that vary per-architecture: - */ +void +sparc32_collect_fpregset (const struct regcache *regcache, + int regnum, void *fpregs) +{ + char *regs = fpregs; + int i; - switch (info.bfd_arch_info->mach) + for (i = 0; i < 32; i++) { - case bfd_mach_sparc: - set_gdbarch_extract_return_value (gdbarch, sparc32_extract_return_value); - set_gdbarch_store_return_value (gdbarch, sparc32_store_return_value); - set_gdbarch_num_regs (gdbarch, 72); - set_gdbarch_deprecated_register_bytes (gdbarch, 32*4 + 32*4 + 8*4); - set_gdbarch_register_name (gdbarch, sparc32_register_name); - tdep->fp_register_bytes = 32 * 4; - tdep->print_insn_mach = bfd_mach_sparc; - break; - case bfd_mach_sparc_v8plus: - set_gdbarch_extract_return_value (gdbarch, sparc32_extract_return_value); - set_gdbarch_store_return_value (gdbarch, sparc32_store_return_value); - set_gdbarch_num_regs (gdbarch, 72); - set_gdbarch_deprecated_register_bytes (gdbarch, 32*4 + 32*4 + 8*4); - set_gdbarch_register_name (gdbarch, sparc32_register_name); - tdep->print_insn_mach = bfd_mach_sparc; - tdep->fp_register_bytes = 32 * 4; - break; - case bfd_mach_sparc_v8plusa: - set_gdbarch_extract_return_value (gdbarch, sparc32_extract_return_value); - set_gdbarch_store_return_value (gdbarch, sparc32_store_return_value); - set_gdbarch_num_regs (gdbarch, 72); - set_gdbarch_deprecated_register_bytes (gdbarch, 32*4 + 32*4 + 8*4); - set_gdbarch_register_name (gdbarch, sparc32_register_name); - tdep->fp_register_bytes = 32 * 4; - tdep->print_insn_mach = bfd_mach_sparc; - break; - case bfd_mach_sparc_v9: - set_gdbarch_deprecated_extract_return_value (gdbarch, sparc64_extract_return_value); - set_gdbarch_num_regs (gdbarch, 125); - set_gdbarch_deprecated_register_bytes (gdbarch, 32*8 + 32*8 + 45*8); - set_gdbarch_register_name (gdbarch, sparc64_register_name); - set_gdbarch_deprecated_store_return_value (gdbarch, sparc_store_return_value); - tdep->fp_register_bytes = 64 * 4; - tdep->print_insn_mach = bfd_mach_sparc_v9a; - break; - case bfd_mach_sparc_v9a: - set_gdbarch_deprecated_extract_return_value (gdbarch, sparc64_extract_return_value); - set_gdbarch_num_regs (gdbarch, 125); - set_gdbarch_deprecated_register_bytes (gdbarch, 32*8 + 32*8 + 45*8); - set_gdbarch_register_name (gdbarch, sparc64_register_name); - set_gdbarch_deprecated_store_return_value (gdbarch, sparc_store_return_value); - tdep->fp_register_bytes = 64 * 4; - tdep->print_insn_mach = bfd_mach_sparc_v9a; - break; + if (regnum == (SPARC_F0_REGNUM + i) || regnum == -1) + regcache_raw_collect (regcache, SPARC_F0_REGNUM + i, regs + (i * 4)); } - set_gdbarch_print_insn (gdbarch, print_insn_sparc); - - /* Hook in OS ABI-specific overrides, if they have been registered. */ - gdbarch_init_osabi (info, gdbarch); - - return gdbarch; + if (regnum == SPARC32_FSR_REGNUM || regnum == -1) + regcache_raw_collect (regcache, SPARC32_FSR_REGNUM, regs + (32 * 4) + 4); } + -static void -sparc_dump_tdep (struct gdbarch *current_gdbarch, struct ui_file *file) +/* SunOS 4. */ + +/* From <machine/reg.h>. */ +const struct sparc_gregset sparc32_sunos4_gregset = { - struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); + 0 * 4, /* %psr */ + 1 * 4, /* %pc */ + 2 * 4, /* %npc */ + 3 * 4, /* %y */ + -1, /* %wim */ + -1, /* %tbr */ + 4 * 4, /* %g1 */ + -1 /* %l0 */ +}; + - if (tdep == NULL) - return; +/* Provide a prototype to silence -Wmissing-prototypes. */ +void _initialize_sparc_tdep (void); - fprintf_unfiltered (file, "sparc_dump_tdep: fp_register_bytes = %d\n", - tdep->fp_register_bytes); - fprintf_unfiltered (file, "sparc_dump_tdep: y_regnum = %d\n", - tdep->y_regnum); - fprintf_unfiltered (file, "sparc_dump_tdep: fp_max_regnum = %d\n", - tdep->fp_max_regnum); - fprintf_unfiltered (file, "sparc_dump_tdep: intreg_size = %d\n", - tdep->intreg_size); - fprintf_unfiltered (file, "sparc_dump_tdep: reg_save_offset = %d\n", - tdep->reg_save_offset); - fprintf_unfiltered (file, "sparc_dump_tdep: call_dummy_call_offset = %d\n", - tdep->call_dummy_call_offset); - fprintf_unfiltered (file, "sparc_dump_tdep: print_insn_match = %d\n", - tdep->print_insn_mach); +void +_initialize_sparc_tdep (void) +{ + register_gdbarch_init (bfd_arch_sparc, sparc32_gdbarch_init); } |