diff options
Diffstat (limited to 'gdb/arc-tdep.c')
| -rw-r--r-- | gdb/arc-tdep.c | 140 |
1 files changed, 77 insertions, 63 deletions
diff --git a/gdb/arc-tdep.c b/gdb/arc-tdep.c index 16e259b87ca..6e0cf8dc2ae 100644 --- a/gdb/arc-tdep.c +++ b/gdb/arc-tdep.c @@ -1,21 +1,22 @@ /* ARC target-dependent stuff. Copyright (C) 1995, 1997 Free Software Foundation, Inc. -This file is part of GDB. + This file is part of GDB. -This program is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2 of the License, or -(at your option) any later version. + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. -This program is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. -You should have received a copy of the GNU General Public License -along with this program; if not, write to the Free Software -Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ #include "defs.h" #include "frame.h" @@ -32,12 +33,20 @@ char *arc_cpu_type; char *tmp_arc_cpu_type; /* Table of cpu names. */ -struct { - char *name; - int value; -} arc_cpu_type_table[] = { - { "base", bfd_mach_arc_base }, - { NULL, 0 } +struct + { + char *name; + int value; + } +arc_cpu_type_table[] = +{ + { + "base", bfd_mach_arc_base + } + , + { + NULL, 0 + } }; /* Used by simulator. */ @@ -81,7 +90,7 @@ static void codestream_read PARAMS ((unsigned int *, int)); static void codestream_seek PARAMS ((CORE_ADDR)); static unsigned int codestream_fill PARAMS ((int)); -#define CODESTREAM_BUFSIZ 16 +#define CODESTREAM_BUFSIZ 16 static CORE_ADDR codestream_next_addr; static CORE_ADDR codestream_addr; static unsigned int codestream_buf[CODESTREAM_BUFSIZ]; @@ -99,9 +108,9 @@ static int codestream_cnt; ? codestream_fill (0) \ : codestream_buf[codestream_off++]) -static unsigned int +static unsigned int codestream_fill (peek_flag) - int peek_flag; + int peek_flag; { codestream_addr = codestream_next_addr; codestream_next_addr += CODESTREAM_BUFSIZ * sizeof (codestream_buf[0]); @@ -121,7 +130,7 @@ codestream_fill (peek_flag) for (j = 0; j < n / 2; ++j) tmp = p[j], p[j] = p[n - 1 - j], p[n - 1 - j] = tmp; } - + if (peek_flag) return codestream_peek (); else @@ -130,7 +139,7 @@ codestream_fill (peek_flag) static void codestream_seek (place) - CORE_ADDR place; + CORE_ADDR place; { codestream_next_addr = place / CODESTREAM_BUFSIZ; codestream_next_addr *= CODESTREAM_BUFSIZ; @@ -203,16 +212,16 @@ arc_get_frame_setup (pc) { insn = codestream_get (); /* Frame may not be necessary, even though blink is saved. - At least this is something we recognize. */ + At least this is something we recognize. */ frame_size = 0; } - if ((insn & BUILD_INSN (-1, 0, -1, -1, -1)) /* st fp,[sp] */ + if ((insn & BUILD_INSN (-1, 0, -1, -1, -1)) /* st fp,[sp] */ == BUILD_INSN (2, 0, SP_REGNUM, FP_REGNUM, 0)) - { + { insn = codestream_get (); if ((insn & BUILD_INSN (-1, -1, -1, -1, 0)) - != BUILD_INSN (12, FP_REGNUM, SP_REGNUM, SP_REGNUM, 0)) + != BUILD_INSN (12, FP_REGNUM, SP_REGNUM, SP_REGNUM, 0)) return -1; /* Check for stack adjustment sub sp,sp,N. */ @@ -229,7 +238,7 @@ arc_get_frame_setup (pc) if (frame_size < 0) return -1; - codestream_get (); + codestream_get (); /* This sequence is used to get the address of the return buffer for a function that returns a structure. */ @@ -283,8 +292,8 @@ arc_skip_prologue (pc, frameless_p) insn = codestream_peek (); if ((insn & BUILD_INSN (-1, 0, -1, 0, 0)) != BUILD_INSN (2, 0, SP_REGNUM, 0, 0)) - break; /* not st insn */ - if (! ARC_CALL_SAVED_REG (X_C (insn))) + break; /* not st insn */ + if (!ARC_CALL_SAVED_REG (X_C (insn))) break; codestream_get (); } @@ -360,11 +369,11 @@ frame_find_saved_regs (fip, fsrp) dummy_bottom = fip->frame - 4 - REGISTER_BYTES - CALL_DUMMY_LENGTH; /* Check if the PC is in the stack, in a dummy frame. */ - if (dummy_bottom <= fip->pc && fip->pc <= fip->frame) + if (dummy_bottom <= fip->pc && fip->pc <= fip->frame) { /* all regs were saved by push_call_dummy () */ adr = fip->frame; - for (i = 0; i < NUM_REGS; i++) + for (i = 0; i < NUM_REGS; i++) { adr -= REGISTER_RAW_SIZE (i); fsrp->regs[i] = adr; @@ -374,7 +383,7 @@ frame_find_saved_regs (fip, fsrp) locals = arc_get_frame_setup (get_pc_function_start (fip->pc)); - if (locals >= 0) + if (locals >= 0) { /* Set `adr' to the value of `sp'. */ adr = fip->frame - locals; @@ -382,9 +391,9 @@ frame_find_saved_regs (fip, fsrp) { insn = codestream_get (); if ((insn & BUILD_INSN (-1, 0, -1, 0, 0)) - != BUILD_INSN (2, 0, SP_REGNUM, 0, 0)) + != BUILD_INSN (2, 0, SP_REGNUM, 0, 0)) break; - regnum = X_C (insn); + regnum = X_C (insn); offset = X_D (insn); fsrp->regs[regnum] = adr + offset; } @@ -402,7 +411,7 @@ push_dummy_frame () char regbuf[MAX_REGISTER_RAW_SIZE]; read_register_gen (PC_REGNUM, regbuf); - write_memory (sp+4, regbuf, REGISTER_SIZE); + write_memory (sp + 4, regbuf, REGISTER_SIZE); read_register_gen (FP_REGNUM, regbuf); write_memory (sp, regbuf, REGISTER_SIZE); write_register (FP_REGNUM, sp); @@ -411,7 +420,7 @@ push_dummy_frame () read_register_gen (regnum, regbuf); sp = push_bytes (sp, regbuf, REGISTER_RAW_SIZE (regnum)); } - sp += (2*REGISTER_SIZE); + sp += (2 * REGISTER_SIZE); write_register (SP_REGNUM, sp); } @@ -423,10 +432,10 @@ pop_frame () int regnum; struct frame_saved_regs fsr; char regbuf[MAX_REGISTER_RAW_SIZE]; - + fp = FRAME_FP (frame); get_frame_saved_regs (frame, &fsr); - for (regnum = 0; regnum < NUM_REGS; regnum++) + for (regnum = 0; regnum < NUM_REGS; regnum++) { CORE_ADDR adr; adr = fsr.regs[regnum]; @@ -447,11 +456,12 @@ pop_frame () typedef enum { - NORMAL4, /* a normal 4 byte insn */ - NORMAL8, /* a normal 8 byte insn */ - BRANCH4, /* a 4 byte branch insn, including ones without delay slots */ - BRANCH8, /* an 8 byte branch insn, including ones with delay slots */ -} insn_type; + NORMAL4, /* a normal 4 byte insn */ + NORMAL8, /* a normal 8 byte insn */ + BRANCH4, /* a 4 byte branch insn, including ones without delay slots */ + BRANCH8, /* an 8 byte branch insn, including ones with delay slots */ +} +insn_type; /* Return the type of INSN and store in TARGET the destination address of a branch if this is one. */ @@ -466,26 +476,30 @@ get_insn_type (insn, pc, target) switch (insn >> 27) { - case 0 : case 1 : case 2 : /* load/store insns */ + case 0: + case 1: + case 2: /* load/store insns */ if (LIMM_P (X_A (insn)) || LIMM_P (X_B (insn)) || LIMM_P (X_C (insn))) return NORMAL8; return NORMAL4; - case 4 : case 5 : case 6 : /* branch insns */ + case 4: + case 5: + case 6: /* branch insns */ *target = pc + 4 + X_L (insn); /* ??? It isn't clear that this is always the right answer. - The problem occurs when the next insn is an 8 byte insn. If the - branch is conditional there's no worry as there shouldn't be an 8 - byte insn following. The programmer may be cheating if s/he knows - the branch will never be taken, but we don't deal with that. - Note that the programmer is also allowed to play games by putting - an insn with long immediate data in the delay slot and then duplicate - the long immediate data at the branch target. Ugh! */ + The problem occurs when the next insn is an 8 byte insn. If the + branch is conditional there's no worry as there shouldn't be an 8 + byte insn following. The programmer may be cheating if s/he knows + the branch will never be taken, but we don't deal with that. + Note that the programmer is also allowed to play games by putting + an insn with long immediate data in the delay slot and then duplicate + the long immediate data at the branch target. Ugh! */ if (X_N (insn) == 0) return BRANCH4; return BRANCH8; - case 7 : /* jump insns */ + case 7: /* jump insns */ if (LIMM_P (X_B (insn))) { limm = read_memory_integer (pc + 4, 4); @@ -499,7 +513,7 @@ get_insn_type (insn, pc, target) if (X_Q (insn) == 0 && X_N (insn) == 0) return BRANCH4; return BRANCH8; - default : /* arithmetic insns, etc. */ + default: /* arithmetic insns, etc. */ if (LIMM_P (X_A (insn)) || LIMM_P (X_B (insn)) || LIMM_P (X_C (insn))) @@ -518,7 +532,7 @@ get_insn_type (insn, pc, target) void arc_software_single_step (ignore, insert_breakpoints_p) - enum target_signal ignore; /* sig but we don't need it */ + enum target_signal ignore; /* sig but we don't need it */ int insert_breakpoints_p; { static CORE_ADDR next_pc, target; @@ -543,10 +557,10 @@ arc_software_single_step (ignore, insert_breakpoints_p) brktrg_p = 0; if ((type == BRANCH4 || type == BRANCH8) - /* Watch out for branches to the following location. - We just stored a breakpoint there and another call to - target_insert_breakpoint will think the real insn is the - breakpoint we just stored there. */ + /* Watch out for branches to the following location. + We just stored a breakpoint there and another call to + target_insert_breakpoint will think the real insn is the + breakpoint we just stored there. */ && target != next_pc) { brktrg_p = 1; @@ -575,7 +589,7 @@ arc_software_single_step (ignore, insert_breakpoints_p) This routine returns true on success. */ int -get_longjmp_target(pc) +get_longjmp_target (pc) CORE_ADDR *pc; { char buf[TARGET_PTR_BIT / TARGET_CHAR_BIT]; @@ -583,7 +597,7 @@ get_longjmp_target(pc) sp = read_register (SP_REGNUM); - if (target_read_memory (sp + SP_ARG0, /* Offset of first arg on stack */ + if (target_read_memory (sp + SP_ARG0, /* Offset of first arg on stack */ buf, TARGET_PTR_BIT / TARGET_CHAR_BIT)) return 0; @@ -644,7 +658,7 @@ arc_set_cpu_type_command (args, from_tty) return; } - + if (!arc_set_cpu_type (tmp_arc_cpu_type)) { error ("Unknown cpu type `%s'.", tmp_arc_cpu_type); |