diff options
Diffstat (limited to 'gdb/sparcnbsd-tdep.c')
| -rw-r--r-- | gdb/sparcnbsd-tdep.c | 648 |
1 files changed, 228 insertions, 420 deletions
diff --git a/gdb/sparcnbsd-tdep.c b/gdb/sparcnbsd-tdep.c index f2595074048..7a23ff3134c 100644 --- a/gdb/sparcnbsd-tdep.c +++ b/gdb/sparcnbsd-tdep.c @@ -1,5 +1,6 @@ -/* Target-dependent code for SPARC systems running NetBSD. - Copyright 2002, 2003 Free Software Foundation, Inc. +/* Target-dependent code for NetBSD/sparc. + + Copyright 2002, 2003, 2004 Free Software Foundation, Inc. Contributed by Wasabi Systems, Inc. This file is part of GDB. @@ -20,495 +21,274 @@ Boston, MA 02111-1307, USA. */ #include "defs.h" +#include "floatformat.h" +#include "frame.h" +#include "frame-unwind.h" #include "gdbcore.h" -#include "regcache.h" -#include "target.h" -#include "value.h" #include "osabi.h" +#include "regcache.h" +#include "regset.h" +#include "solib-svr4.h" +#include "symtab.h" +#include "trad-frame.h" +#include "gdb_assert.h" #include "gdb_string.h" #include "sparc-tdep.h" -#include "sparcnbsd-tdep.h" #include "nbsd-tdep.h" -#include "solib-svr4.h" - -#define REG32_OFFSET_PSR (0 * 4) -#define REG32_OFFSET_PC (1 * 4) -#define REG32_OFFSET_NPC (2 * 4) -#define REG32_OFFSET_Y (3 * 4) -#define REG32_OFFSET_GLOBAL (4 * 4) -#define REG32_OFFSET_OUT (12 * 4) - -#define REG64_OFFSET_TSTATE (0 * 8) -#define REG64_OFFSET_PC (1 * 8) -#define REG64_OFFSET_NPC (2 * 8) -#define REG64_OFFSET_Y (3 * 8) -#define REG64_OFFSET_GLOBAL (4 * 8) -#define REG64_OFFSET_OUT (12 * 8) - -void -sparcnbsd_supply_reg32 (char *regs, int regno) +const struct sparc_gregset sparc32nbsd_gregset = { - int i; - - if (regno == PS_REGNUM || regno == -1) - supply_register (PS_REGNUM, regs + REG32_OFFSET_PSR); - - if (regno == PC_REGNUM || regno == -1) - supply_register (PC_REGNUM, regs + REG32_OFFSET_PC); - - if (regno == DEPRECATED_NPC_REGNUM || regno == -1) - supply_register (DEPRECATED_NPC_REGNUM, regs + REG32_OFFSET_NPC); - - if (regno == Y_REGNUM || regno == -1) - supply_register (Y_REGNUM, regs + REG32_OFFSET_Y); - - if ((regno >= G0_REGNUM && regno <= G7_REGNUM) || regno == -1) - { - if (regno == G0_REGNUM || regno == -1) - supply_register (G0_REGNUM, NULL); /* %g0 is always zero */ - for (i = G1_REGNUM; i <= G7_REGNUM; i++) - { - if (regno == i || regno == -1) - supply_register (i, regs + REG32_OFFSET_GLOBAL + - ((i - G0_REGNUM) * 4)); - } - } - - if ((regno >= O0_REGNUM && regno <= O7_REGNUM) || regno == -1) - { - for (i = O0_REGNUM; i <= O7_REGNUM; i++) - { - if (regno == i || regno == -1) - supply_register (i, regs + REG32_OFFSET_OUT + - ((i - O0_REGNUM) * 4)); - } - } + 0 * 4, /* %psr */ + 1 * 4, /* %pc */ + 2 * 4, /* %npc */ + 3 * 4, /* %y */ + -1, /* %wim */ + -1, /* %tbr */ + 5 * 4, /* %g1 */ + -1 /* %l0 */ +}; - /* Inputs and Locals are stored onto the stack by by the kernel. */ - if ((regno >= L0_REGNUM && regno <= I7_REGNUM) || regno == -1) - { - CORE_ADDR sp = read_register (SP_REGNUM); - char buf[4]; - - for (i = L0_REGNUM; i <= I7_REGNUM; i++) - { - if (regno == i || regno == -1) - { - target_read_memory (sp + ((i - L0_REGNUM) * 4), - buf, sizeof (buf)); - supply_register (i, buf); - } - } - } +static void +sparc32nbsd_supply_gregset (const struct regset *regset, + struct regcache *regcache, + int regnum, const void *gregs, size_t len) +{ + sparc32_supply_gregset (regset->descr, regcache, regnum, gregs); - /* FIXME: If we don't set these valid, read_register_bytes() rereads - all the regs every time it is called! */ - if (regno == WIM_REGNUM || regno == -1) - supply_register (WIM_REGNUM, NULL); - if (regno == TBR_REGNUM || regno == -1) - supply_register (TBR_REGNUM, NULL); - if (regno == CPS_REGNUM || regno == -1) - supply_register (CPS_REGNUM, NULL); + /* Traditional NetBSD core files don't use multiple register sets. + Instead, the general-purpose and floating-point registers are + lumped together in a single section. */ + if (len >= 212) + sparc32_supply_fpregset (regcache, regnum, (const char *) gregs + 80); } -void -sparcnbsd_supply_reg64 (char *regs, int regno) +static void +sparc32nbsd_supply_fpregset (const struct regset *regset, + struct regcache *regcache, + int regnum, const void *fpregs, size_t len) { - int i; - char buf[8]; - - if (regno == TSTATE_REGNUM || regno == -1) - supply_register (PS_REGNUM, regs + REG64_OFFSET_TSTATE); + sparc32_supply_fpregset (regcache, regnum, fpregs); +} - if (regno == PC_REGNUM || regno == -1) - supply_register (PC_REGNUM, regs + REG64_OFFSET_PC); + +/* Signal trampolines. */ - if (regno == DEPRECATED_NPC_REGNUM || regno == -1) - supply_register (DEPRECATED_NPC_REGNUM, regs + REG64_OFFSET_NPC); +/* The following variables describe the location of an on-stack signal + trampoline. The current values correspond to the memory layout for + NetBSD 1.3 and up. These shouldn't be necessary for NetBSD 2.0 and + up, since NetBSD uses signal trampolines provided by libc now. */ - if (regno == Y_REGNUM || regno == -1) - { - memset (buf, 0, sizeof (buf)); - memcpy (&buf[4], regs + REG64_OFFSET_Y, 4); - supply_register (Y_REGNUM, buf); - } +static const CORE_ADDR sparc32nbsd_sigtramp_start = 0xeffffef0; +static const CORE_ADDR sparc32nbsd_sigtramp_end = 0xeffffff0; - if ((regno >= G0_REGNUM && regno <= G7_REGNUM) || regno == -1) - { - if (regno == G0_REGNUM || regno == -1) - supply_register (G0_REGNUM, NULL); /* %g0 is always zero */ - for (i = G1_REGNUM; i <= G7_REGNUM; i++) - { - if (regno == i || regno == -1) - supply_register (i, regs + REG64_OFFSET_GLOBAL + - ((i - G0_REGNUM) * 8)); - } - } - - if ((regno >= O0_REGNUM && regno <= O7_REGNUM) || regno == -1) - { - for (i = O0_REGNUM; i <= O7_REGNUM; i++) - { - if (regno == i || regno == -1) - supply_register (i, regs + REG64_OFFSET_OUT + - ((i - O0_REGNUM) * 8)); - } - } - - /* Inputs and Locals are stored onto the stack by by the kernel. */ - if ((regno >= L0_REGNUM && regno <= I7_REGNUM) || regno == -1) - { - CORE_ADDR sp = read_register (SP_REGNUM); - char buf[8]; - - if (sp & 1) - { - /* Registers are 64-bit. */ - sp += 2047; - - for (i = L0_REGNUM; i <= I7_REGNUM; i++) - { - if (regno == i || regno == -1) - { - target_read_memory (sp + ((i - L0_REGNUM) * 8), - buf, sizeof (buf)); - supply_register (i, buf); - } - } - } - else - { - /* Registers are 32-bit. Toss any sign-extension of the stack - pointer, clear out the top half of the temporary buffer, and - put the register value in the bottom half. */ - - sp &= 0xffffffffUL; - memset (buf, 0, sizeof (buf)); - for (i = L0_REGNUM; i <= I7_REGNUM; i++) - { - if (regno == i || regno == -1) - { - target_read_memory (sp + ((i - L0_REGNUM) * 4), - &buf[4], sizeof (buf)); - supply_register (i, buf); - } - } - } - } +static int +sparc32nbsd_pc_in_sigtramp (CORE_ADDR pc, char *name) +{ + if (pc >= sparc32nbsd_sigtramp_start && pc < sparc32nbsd_sigtramp_end) + return 1; - /* FIXME: If we don't set these valid, read_register_bytes() rereads - all the regs every time it is called! */ - if (regno == WIM_REGNUM || regno == -1) - supply_register (WIM_REGNUM, NULL); - if (regno == TBR_REGNUM || regno == -1) - supply_register (TBR_REGNUM, NULL); - if (regno == CPS_REGNUM || regno == -1) - supply_register (CPS_REGNUM, NULL); + return nbsd_pc_in_sigtramp (pc, name); } -void -sparcnbsd_fill_reg32 (char *regs, int regno) +struct trad_frame_saved_reg * +sparc32nbsd_sigcontext_saved_regs (struct frame_info *next_frame) { - int i; - - if (regno == PS_REGNUM || regno == -1) - regcache_collect (PS_REGNUM, regs + REG32_OFFSET_PSR); - - if (regno == PC_REGNUM || regno == -1) - regcache_collect (PC_REGNUM, regs + REG32_OFFSET_PC); - - if (regno == DEPRECATED_NPC_REGNUM || regno == -1) - regcache_collect (DEPRECATED_NPC_REGNUM, regs + REG32_OFFSET_NPC); - - if (regno == Y_REGNUM || regno == -1) - regcache_collect (Y_REGNUM, regs + REG32_OFFSET_Y); - - if ((regno >= G0_REGNUM && regno <= G7_REGNUM) || regno == -1) + struct trad_frame_saved_reg *saved_regs; + CORE_ADDR addr, sigcontext_addr; + int regnum, delta; + ULONGEST psr; + + saved_regs = trad_frame_alloc_saved_regs (next_frame); + + /* We find the appropriate instance of `struct sigcontext' at a + fixed offset in the signal frame. */ + addr = frame_unwind_register_unsigned (next_frame, SPARC_FP_REGNUM); + sigcontext_addr = addr + 64 + 16; + + /* The registers are saved in bits and pieces scattered all over the + place. The code below records their location on the assumption + that the part of the signal trampoline that saves the state has + been executed. */ + + saved_regs[SPARC_SP_REGNUM].addr = sigcontext_addr + 8; + saved_regs[SPARC32_PC_REGNUM].addr = sigcontext_addr + 12; + saved_regs[SPARC32_NPC_REGNUM].addr = sigcontext_addr + 16; + saved_regs[SPARC32_PSR_REGNUM].addr = sigcontext_addr + 20; + saved_regs[SPARC_G1_REGNUM].addr = sigcontext_addr + 24; + saved_regs[SPARC_O0_REGNUM].addr = sigcontext_addr + 28; + + /* The remaining `global' registers and %y are saved in the `local' + registers. */ + delta = SPARC_L0_REGNUM - SPARC_G0_REGNUM; + for (regnum = SPARC_G2_REGNUM; regnum <= SPARC_G7_REGNUM; regnum++) + saved_regs[regnum].realreg = regnum + delta; + saved_regs[SPARC32_Y_REGNUM].realreg = SPARC_L1_REGNUM; + + /* The remaining `out' registers can be found in the current frame's + `in' registers. */ + delta = SPARC_I0_REGNUM - SPARC_O0_REGNUM; + for (regnum = SPARC_O1_REGNUM; regnum <= SPARC_O5_REGNUM; regnum++) + saved_regs[regnum].realreg = regnum + delta; + saved_regs[SPARC_O7_REGNUM].realreg = SPARC_I7_REGNUM; + + /* The `local' and `in' registers have been saved in the register + save area. */ + addr = saved_regs[SPARC_SP_REGNUM].addr; + addr = get_frame_memory_unsigned (next_frame, addr, 4); + for (regnum = SPARC_L0_REGNUM; + regnum <= SPARC_I7_REGNUM; regnum++, addr += 4) + saved_regs[regnum].addr = addr; + + /* The floating-point registers are only saved if the EF bit in %prs + has been set. */ + +#define PSR_EF 0x00001000 + + addr = saved_regs[SPARC32_PSR_REGNUM].addr; + psr = get_frame_memory_unsigned (next_frame, addr, 4); + if (psr & PSR_EF) { - /* %g0 is always zero */ - for (i = G1_REGNUM; i <= G7_REGNUM; i++) - { - if (regno == i || regno == -1) - regcache_collect (i, regs + REG32_OFFSET_GLOBAL + - ((i - G0_REGNUM) * 4)); - } - } + CORE_ADDR sp; - if ((regno >= O0_REGNUM && regno <= O7_REGNUM) || regno == -1) - { - for (i = O0_REGNUM; i <= O7_REGNUM; i++) - { - if (regno == i || regno == -1) - regcache_collect (i, regs + REG32_OFFSET_OUT + - ((i - O0_REGNUM) * 4)); - } + sp = frame_unwind_register_unsigned (next_frame, SPARC_SP_REGNUM); + saved_regs[SPARC32_FSR_REGNUM].addr = sp + 96; + for (regnum = SPARC_F0_REGNUM, addr = sp + 96 + 8; + regnum <= SPARC_F31_REGNUM; regnum++, addr += 4) + saved_regs[regnum].addr = addr; } - /* Responsibility for the stack regs is pushed off onto the caller. */ + return saved_regs; } -void -sparcnbsd_fill_reg64 (char *regs, int regno) +static struct sparc_frame_cache * +sparc32nbsd_sigcontext_frame_cache (struct frame_info *next_frame, + void **this_cache) { - int i; - - if (regno == TSTATE_REGNUM || regno == -1) - regcache_collect (TSTATE_REGNUM, regs + REG64_OFFSET_TSTATE); - - if (regno == PC_REGNUM || regno == -1) - regcache_collect (PC_REGNUM, regs + REG64_OFFSET_PC); + struct sparc_frame_cache *cache; + CORE_ADDR addr; - if (regno == DEPRECATED_NPC_REGNUM || regno == -1) - regcache_collect (DEPRECATED_NPC_REGNUM, regs + REG64_OFFSET_NPC); + if (*this_cache) + return *this_cache; - if (regno == Y_REGNUM || regno == -1) - regcache_collect (Y_REGNUM, regs + REG64_OFFSET_Y); + cache = sparc_frame_cache (next_frame, this_cache); + gdb_assert (cache == *this_cache); - if ((regno >= G0_REGNUM && regno <= G7_REGNUM) || regno == -1) + /* If we couldn't find the frame's function, we're probably dealing + with an on-stack signal trampoline. */ + if (cache->pc == 0) { - /* %g0 is always zero */ - for (i = G1_REGNUM; i <= G7_REGNUM; i++) - { - if (regno == i || regno == -1) - regcache_collect (i, regs + REG64_OFFSET_GLOBAL + - ((i - G0_REGNUM) * 4)); - } - } + cache->pc = sparc32nbsd_sigtramp_start; - if ((regno >= O0_REGNUM && regno <= O7_REGNUM) || regno == -1) - { - for (i = O0_REGNUM; i <= O7_REGNUM; i++) - { - if (regno == i || regno == -1) - regcache_collect (i, regs + REG64_OFFSET_OUT + - ((i - O0_REGNUM) * 4)); - } + /* Since we couldn't find the frame's function, the cache was + initialized under the assumption that we're frameless. */ + cache->frameless_p = 0; + addr = frame_unwind_register_unsigned (next_frame, SPARC_FP_REGNUM); + cache->base = addr; } - /* Responsibility for the stack regs is pushed off onto the caller. */ -} + cache->saved_regs = sparc32nbsd_sigcontext_saved_regs (next_frame); -void -sparcnbsd_supply_fpreg32 (char *fpregs, int regno) -{ - int i; - - for (i = 0; i <= 31; i++) - { - if (regno == (FP0_REGNUM + i) || regno == -1) - supply_register (FP0_REGNUM + i, fpregs + (i * 4)); - } - - if (regno == FPS_REGNUM || regno == -1) - supply_register (FPS_REGNUM, fpregs + (32 * 4)); + return cache; } -void -sparcnbsd_supply_fpreg64 (char *fpregs, int regno) +static void +sparc32nbsd_sigcontext_frame_this_id (struct frame_info *next_frame, + void **this_cache, + struct frame_id *this_id) { - int i; + struct sparc_frame_cache *cache = + sparc32nbsd_sigcontext_frame_cache (next_frame, this_cache); - for (i = 0; i <= 31; i++) - { - if (regno == (FP0_REGNUM + i) || regno == -1) - supply_register (FP0_REGNUM + i, fpregs + (i * 4)); - } - - for (; i <= 47; i++) - { - if (regno == (FP0_REGNUM + i) || regno == -1) - supply_register (FP0_REGNUM + i, fpregs + (32 * 4) + (i * 8)); - } - - if (regno == FPS_REGNUM || regno == -1) - supply_register (FPS_REGNUM, fpregs + (32 * 4) + (16 * 8)); - - /* XXX %gsr */ + (*this_id) = frame_id_build (cache->base, cache->pc); } -void -sparcnbsd_fill_fpreg32 (char *fpregs, int regno) +static void +sparc32nbsd_sigcontext_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) { - int i; - - for (i = 0; i <= 31; i++) - { - if (regno == (FP0_REGNUM + i) || regno == -1) - regcache_collect (FP0_REGNUM + i, fpregs + (i * 4)); - } + struct sparc_frame_cache *cache = + sparc32nbsd_sigcontext_frame_cache (next_frame, this_cache); - if (regno == FPS_REGNUM || regno == -1) - regcache_collect (FPS_REGNUM, fpregs + (32 * 4)); + trad_frame_prev_register (next_frame, cache->saved_regs, regnum, + optimizedp, lvalp, addrp, realnump, valuep); } -void -sparcnbsd_fill_fpreg64 (char *fpregs, int regno) +static const struct frame_unwind sparc32nbsd_sigcontext_frame_unwind = { - int i; - - for (i = 0; i <= 31; i++) - { - if (regno == (FP0_REGNUM + i) || regno == -1) - regcache_collect (FP0_REGNUM + i, fpregs + (i * 4)); - } - - for (; i <= 47; i++) - { - if (regno == (FP0_REGNUM + i) || regno == -1) - regcache_collect (FP0_REGNUM + i, fpregs + (32 * 4) + (i * 8)); - } - - if (regno == FPS_REGNUM || regno == -1) - regcache_collect (FPS_REGNUM, fpregs + (32 * 4) + (16 * 8)); - - /* XXX %gsr */ -} + SIGTRAMP_FRAME, + sparc32nbsd_sigcontext_frame_this_id, + sparc32nbsd_sigcontext_frame_prev_register +}; -/* Unlike other NetBSD implementations, the SPARC port historically used - .reg and .reg2 (see bfd/netbsd-core.c), and as such, we can share one - routine for a.out and ELF core files. */ -static void -fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which, - CORE_ADDR ignore) +static const struct frame_unwind * +sparc32nbsd_sigtramp_frame_sniffer (struct frame_info *next_frame) { - int reg_size, fpreg_size; + CORE_ADDR pc = frame_pc_unwind (next_frame); + char *name; - if (gdbarch_ptr_bit (current_gdbarch) == 32) + find_pc_partial_function (pc, &name, NULL, NULL); + if (sparc32nbsd_pc_in_sigtramp (pc, name)) { - reg_size = (20 * 4); - fpreg_size = (33 * 4); - } - else - { - reg_size = (20 * 8); - fpreg_size = (64 * 4) - + 8 /* fsr */ - + 4 /* gsr */ - + 4; /* pad */ + if (name == NULL || strncmp (name, "__sigtramp_sigcontext", 21)) + return &sparc32nbsd_sigcontext_frame_unwind; } - switch (which) - { - case 0: /* Integer registers */ - if (core_reg_size != reg_size) - warning ("Wrong size register set in core file."); - else if (gdbarch_ptr_bit (current_gdbarch) == 32) - sparcnbsd_supply_reg32 (core_reg_sect, -1); - else - sparcnbsd_supply_reg64 (core_reg_sect, -1); - break; - - case 2: /* Floating pointer registers */ - if (core_reg_size != fpreg_size) - warning ("Wrong size FP register set in core file."); - else if (gdbarch_ptr_bit (current_gdbarch) == 32) - sparcnbsd_supply_fpreg32 (core_reg_sect, -1); - else - sparcnbsd_supply_fpreg64 (core_reg_sect, -1); - break; - - default: - /* Don't know what kind of register request this is; just ignore it. */ - break; - } + return NULL; } + -static struct core_fns sparcnbsd_core_fns = -{ - bfd_target_unknown_flavour, /* core_flavour */ - default_check_format, /* check_format */ - default_core_sniffer, /* core_sniffer */ - fetch_core_registers, /* core_read_registers */ - NULL -}; - -static struct core_fns sparcnbsd_elfcore_fns = -{ - bfd_target_elf_flavour, /* core_flavour */ - default_check_format, /* check_format */ - default_core_sniffer, /* core_sniffer */ - fetch_core_registers, /* core_read_registers */ - NULL -}; - -/* FIXME: Need PC_IN_SIGTRAMP() support, but NetBSD/sparc signal trampolines - aren't easily identified. */ +/* Return non-zero if we are in a shared library trampoline code stub. */ static int -sparcnbsd_get_longjmp_target_32 (CORE_ADDR *pc) +sparcnbsd_aout_in_solib_call_trampoline (CORE_ADDR pc, char *name) { - CORE_ADDR jb_addr; - char buf[4]; - - jb_addr = read_register (O0_REGNUM); - - if (target_read_memory (jb_addr + 12, buf, sizeof (buf))) - return 0; - - *pc = extract_unsigned_integer (buf, sizeof (buf)); - - return 1; + return (name && !strcmp (name, "_DYNAMIC")); } -static int -sparcnbsd_get_longjmp_target_64 (CORE_ADDR *pc) +static void +sparc32nbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) { - CORE_ADDR jb_addr; - char buf[8]; - - jb_addr = read_register (O0_REGNUM); + struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); - if (target_read_memory (jb_addr + 16, buf, sizeof (buf))) - return 0; + /* NetBSD doesn't support the 128-bit `long double' from the psABI. */ + set_gdbarch_long_double_bit (gdbarch, 64); + set_gdbarch_long_double_format (gdbarch, &floatformat_ieee_double_big); - *pc = extract_unsigned_integer (buf, sizeof (buf)); - - return 1; -} + tdep->gregset = XMALLOC (struct regset); + tdep->gregset->descr = &sparc32nbsd_gregset; + tdep->gregset->supply_regset = sparc32nbsd_supply_gregset; + tdep->sizeof_gregset = 20 * 4; -static int -sparcnbsd_aout_in_solib_call_trampoline (CORE_ADDR pc, char *name) -{ - if (strcmp (name, "_DYNAMIC") == 0) - return 1; + tdep->fpregset = XMALLOC (struct regset); + tdep->fpregset->supply_regset = sparc32nbsd_supply_fpregset; + tdep->sizeof_fpregset = 33 * 4; - return 0; + set_gdbarch_pc_in_sigtramp (gdbarch, sparc32nbsd_pc_in_sigtramp); + frame_unwind_append_sniffer (gdbarch, sparc32nbsd_sigtramp_frame_sniffer); } static void -sparcnbsd_init_abi_common (struct gdbarch_info info, - struct gdbarch *gdbarch) +sparc32nbsd_aout_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) { - set_gdbarch_get_longjmp_target (gdbarch, gdbarch_ptr_bit (gdbarch) == 32 ? - sparcnbsd_get_longjmp_target_32 : - sparcnbsd_get_longjmp_target_64); -} - -static void -sparcnbsd_init_abi_aout (struct gdbarch_info info, - struct gdbarch *gdbarch) -{ - sparcnbsd_init_abi_common (info, gdbarch); + sparc32nbsd_init_abi (info, gdbarch); - set_gdbarch_in_solib_call_trampoline (gdbarch, - sparcnbsd_aout_in_solib_call_trampoline); + set_gdbarch_in_solib_call_trampoline + (gdbarch, sparcnbsd_aout_in_solib_call_trampoline); } static void -sparcnbsd_init_abi_elf (struct gdbarch_info info, - struct gdbarch *gdbarch) +sparc32nbsd_elf_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) { - sparcnbsd_init_abi_common (info, gdbarch); + sparc32nbsd_init_abi (info, gdbarch); - set_gdbarch_pc_in_sigtramp (gdbarch, nbsd_pc_in_sigtramp); - - set_solib_svr4_fetch_link_map_offsets (gdbarch, - gdbarch_ptr_bit (gdbarch) == 32 ? - nbsd_ilp32_solib_svr4_fetch_link_map_offsets : - nbsd_lp64_solib_svr4_fetch_link_map_offsets); + set_solib_svr4_fetch_link_map_offsets + (gdbarch, nbsd_ilp32_solib_svr4_fetch_link_map_offsets); } static enum gdb_osabi @@ -520,17 +300,45 @@ sparcnbsd_aout_osabi_sniffer (bfd *abfd) return GDB_OSABI_UNKNOWN; } +/* OpenBSD uses the traditional NetBSD core file format, even for + ports that use ELF. Therefore, if the default OS ABI is OpenBSD + ELF, we return that instead of NetBSD a.out. This is mainly for + the benfit of OpenBSD/sparc64, which inherits the sniffer below + since we include this file for an OpenBSD/sparc64 target. For + OpenBSD/sparc, the NetBSD a.out OS ABI is probably similar enough + to both the OpenBSD a.out and the OpenBSD ELF OS ABI. */ +#if defined (GDB_OSABI_DEFAULT) && (GDB_OSABI_DEFAULT == GDB_OSABI_OPENBSD_ELF) +#define GDB_OSABI_NETBSD_CORE GDB_OSABI_OPENBSD_ELF +#else +#define GDB_OSABI_NETBSD_CORE GDB_OSABI_NETBSD_AOUT +#endif + +static enum gdb_osabi +sparcnbsd_core_osabi_sniffer (bfd *abfd) +{ + if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0) + return GDB_OSABI_NETBSD_CORE; + + return GDB_OSABI_UNKNOWN; +} + + +/* Provide a prototype to silence -Wmissing-prototypes. */ +void _initialize_sparcnbsd_tdep (void); + void _initialize_sparnbsd_tdep (void) { gdbarch_register_osabi_sniffer (bfd_arch_sparc, bfd_target_aout_flavour, sparcnbsd_aout_osabi_sniffer); + /* BFD doesn't set the architecture for NetBSD style a.out core + files. */ + gdbarch_register_osabi_sniffer (bfd_arch_unknown, bfd_target_unknown_flavour, + sparcnbsd_core_osabi_sniffer); + gdbarch_register_osabi (bfd_arch_sparc, 0, GDB_OSABI_NETBSD_AOUT, - sparcnbsd_init_abi_aout); + sparc32nbsd_aout_init_abi); gdbarch_register_osabi (bfd_arch_sparc, 0, GDB_OSABI_NETBSD_ELF, - sparcnbsd_init_abi_elf); - - add_core_fns (&sparcnbsd_core_fns); - add_core_fns (&sparcnbsd_elfcore_fns); + sparc32nbsd_elf_init_abi); } |