diff options
Diffstat (limited to 'gdb/rs6000-tdep.c')
| -rw-r--r-- | gdb/rs6000-tdep.c | 81 |
1 files changed, 44 insertions, 37 deletions
diff --git a/gdb/rs6000-tdep.c b/gdb/rs6000-tdep.c index d94fbc8..81aa9a3 100644 --- a/gdb/rs6000-tdep.c +++ b/gdb/rs6000-tdep.c @@ -122,7 +122,7 @@ static const char *powerpc_vector_strings[] = static enum powerpc_vector_abi powerpc_vector_abi_global = POWERPC_VEC_AUTO; static const char *powerpc_vector_abi_string = "auto"; -/* To be used by skip_prologue. */ +/* To be used by skip_prologue. */ struct rs6000_framedata { @@ -135,8 +135,8 @@ struct rs6000_framedata int saved_vr; /* smallest # of saved vr */ int saved_ev; /* smallest # of saved ev */ int alloca_reg; /* alloca register number (frame ptr) */ - char frameless; /* true if frameless functions. */ - char nosavedpc; /* true if pc not saved. */ + char frameless; /* true if frameless functions. */ + char nosavedpc; /* true if pc not saved. */ char used_bl; /* true if link register clobbered */ int gpr_offset; /* offset of saved gprs from prev sp */ int fpr_offset; /* offset of saved fprs from prev sp */ @@ -1017,7 +1017,8 @@ ppc_displaced_step_fixup (struct gdbarch *gdbarch, paddress (gdbarch, insn), paddress (gdbarch, current_pc), paddress (gdbarch, from + offset)); - regcache_cooked_write_unsigned (regs, gdbarch_pc_regnum (gdbarch), + regcache_cooked_write_unsigned (regs, + gdbarch_pc_regnum (gdbarch), from + offset); } } @@ -1275,7 +1276,7 @@ bl_to_blrl_insn_p (CORE_ADDR pc, int insn, enum bfd_endian byte_order) return 0; } -/* Masks for decoding a branch-and-link (bl) instruction. +/* Masks for decoding a branch-and-link (bl) instruction. BL_MASK and BL_INSTRUCTION are used in combination with each other. The former is anded with the opcode in question; if the result of @@ -1317,8 +1318,7 @@ rs6000_skip_stack_check (struct gdbarch *gdbarch, const CORE_ADDR start_pc) /* First possible sequence: A small number of probes. stw 0, -<some immediate>(1) - [repeat this instruction any (small) number of times] - */ + [repeat this instruction any (small) number of times]. */ if ((op & 0xffff0000) == 0x90010000) { @@ -1340,8 +1340,7 @@ rs6000_skip_stack_check (struct gdbarch *gdbarch, const CORE_ADDR start_pc) addi 12,12,-<some immediate> stw 0,0(12) b <disp> - [possibly one last probe: stw 0,<some immediate>(12)] - */ + [possibly one last probe: stw 0,<some immediate>(12)]. */ while (1) { @@ -1397,7 +1396,7 @@ rs6000_skip_stack_check (struct gdbarch *gdbarch, const CORE_ADDR start_pc) if ((op & 0xfc000001) != 0x48000000) break; - /* [possibly one last probe: stw 0,<some immediate>(12)] */ + /* [possibly one last probe: stw 0,<some immediate>(12)]. */ pc = pc + 4; op = rs6000_fetch_instruction (gdbarch, pc); if ((op & 0xffff0000) == 0x900c0000) @@ -1491,8 +1490,7 @@ rs6000_skip_stack_check (struct gdbarch *gdbarch, const CORE_ADDR start_pc) - ev_offset is the offset of the first saved ev from the previous frame. - lr_offset is the offset of the saved lr - cr_offset is the offset of the saved cr - - vrsave_offset is the offset of the saved vrsave register - */ + - vrsave_offset is the offset of the saved vrsave register. */ static CORE_ADDR skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc, CORE_ADDR lim_pc, @@ -1540,7 +1538,7 @@ skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc, CORE_ADDR lim_pc, /* Sometimes it isn't clear if an instruction is a prologue instruction or not. When we encounter one of these ambiguous cases, we'll set prev_insn_was_prologue_insn to 0 (false). - Otherwise, we'll assume that it really is a prologue instruction. */ + Otherwise, we'll assume that it really is a prologue instruction. */ if (prev_insn_was_prologue_insn) last_prologue_pc = pc; @@ -1625,7 +1623,7 @@ skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc, CORE_ADDR lim_pc, /* nop */ /* Allow nops in the prologue, but do not consider them to be part of the prologue unless followed by other prologue - instructions. */ + instructions. */ prev_insn_was_prologue_insn = 0; continue; @@ -1719,7 +1717,7 @@ skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc, CORE_ADDR lim_pc, } else if ((op & 0xfc000001) == 0x48000001) { /* bl foo, - to save fprs??? */ + to save fprs??? */ fdata->frameless = 0; @@ -1741,7 +1739,8 @@ skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc, CORE_ADDR lim_pc, struct symtab_and_line prologue_sal = find_pc_line (orig_pc, 0); struct symtab_and_line this_sal = find_pc_line (pc, 0); - if ((prologue_sal.line == 0) || (prologue_sal.line != this_sal.line)) + if ((prologue_sal.line == 0) + || (prologue_sal.line != this_sal.line)) break; } @@ -1750,11 +1749,11 @@ skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc, CORE_ADDR lim_pc, /* At this point, make sure this is not a trampoline function (a function that simply calls another functions, and nothing else). If the next is not a nop, this branch - was part of the function prologue. */ + was part of the function prologue. */ if (op == 0x4def7b82 || op == 0) /* crorc 15, 15, 15 */ - break; /* don't skip over - this branch */ + break; /* Don't skip over + this branch. */ fdata->used_bl = 1; continue; @@ -1769,7 +1768,7 @@ skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc, CORE_ADDR lim_pc, } else if ((op & 0xfc1f016a) == 0x7c01016e) { /* stwux rX,r1,rY */ - /* no way to figure out what r1 is going to be */ + /* No way to figure out what r1 is going to be. */ fdata->frameless = 0; offset = fdata->offset; continue; @@ -1783,7 +1782,7 @@ skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc, CORE_ADDR lim_pc, } else if ((op & 0xfc1f016a) == 0x7c01016a) { /* stdux rX,r1,rY */ - /* no way to figure out what r1 is going to be */ + /* No way to figure out what r1 is going to be. */ fdata->frameless = 0; offset = fdata->offset; continue; @@ -1797,8 +1796,8 @@ skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc, CORE_ADDR lim_pc, } /* Load up minimal toc pointer. Do not treat an epilogue restore of r31 as a minimal TOC load. */ - else if (((op >> 22) == 0x20f || /* l r31,... or l r30,... */ - (op >> 22) == 0x3af) /* ld r31,... or ld r30,... */ + else if (((op >> 22) == 0x20f || /* l r31,... or l r30,... */ + (op >> 22) == 0x3af) /* ld r31,... or ld r30,... */ && !framep && !minimal_toc_loaded) { @@ -1811,7 +1810,8 @@ skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc, CORE_ADDR lim_pc, else if ((op & 0xfc0007fe) == 0x7c000378 && /* mr(.) Rx,Ry */ (((op >> 21) & 31) >= 3) && /* R3 >= Ry >= R10 */ (((op >> 21) & 31) <= 10) && - ((long) ((op >> 16) & 31) >= fdata->saved_gpr)) /* Rx: local var reg */ + ((long) ((op >> 16) & 31) + >= fdata->saved_gpr)) /* Rx: local var reg */ { continue; @@ -1893,7 +1893,7 @@ skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc, CORE_ADDR lim_pc, vr_saved_offset = SIGNED_SHORT (op); /* This insn by itself is not part of the prologue, unless - if part of the pair of insns mentioned above. So do not + if part of the pair of insns mentioned above. So do not record this insn as part of the prologue yet. */ prev_insn_was_prologue_insn = 0; } @@ -2051,7 +2051,7 @@ skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc, CORE_ADDR lim_pc, #if 0 /* I have problems with skipping over __main() that I need to address - * sometime. Previously, I used to use misc_function_vector which + * sometime. Previously, I used to use misc_function_vector which * didn't work as well as I wanted to be. -MGO */ /* If the first thing after skipping a prolog is a branch to a function, @@ -2062,7 +2062,7 @@ skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc, CORE_ADDR lim_pc, if ((op & 0xfc000001) == 0x48000001) - { /* bl foo, an initializer function? */ + { /* bl foo, an initializer function? */ op = read_memory_integer (pc + 4, 4, byte_order); if (op == 0x4def7b82) @@ -2256,7 +2256,8 @@ rs6000_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc) if (op != trampoline_code[ii]) return 0; } - ii = get_frame_register_unsigned (frame, 11); /* r11 holds destination addr */ + ii = get_frame_register_unsigned (frame, 11); /* r11 holds destination + addr. */ pc = read_memory_unsigned_integer (ii, tdep->wordsize, byte_order); return pc; } @@ -2734,7 +2735,8 @@ efpr_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache, } static void -rs6000_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache, +rs6000_pseudo_register_read (struct gdbarch *gdbarch, + struct regcache *regcache, int reg_nr, gdb_byte *buffer) { struct gdbarch *regcache_arch = get_regcache_arch (regcache); @@ -3194,7 +3196,7 @@ rs6000_frame_cache (struct frame_info *this_frame, void **this_cache) } /* if != -1, fdata.saved_ev is the smallest number of saved_ev. - All vr's from saved_ev to ev31 are saved. ????? */ + All vr's from saved_ev to ev31 are saved. ????? */ if (tdep->ppc_ev0_regnum != -1) { if (fdata.saved_ev >= 0) @@ -3213,12 +3215,14 @@ rs6000_frame_cache (struct frame_info *this_frame, void **this_cache) /* If != 0, fdata.cr_offset is the offset from the frame that holds the CR. */ if (fdata.cr_offset != 0) - cache->saved_regs[tdep->ppc_cr_regnum].addr = cache->base + fdata.cr_offset; + cache->saved_regs[tdep->ppc_cr_regnum].addr + = cache->base + fdata.cr_offset; /* If != 0, fdata.lr_offset is the offset from the frame that holds the LR. */ if (fdata.lr_offset != 0) - cache->saved_regs[tdep->ppc_lr_regnum].addr = cache->base + fdata.lr_offset; + cache->saved_regs[tdep->ppc_lr_regnum].addr + = cache->base + fdata.lr_offset; else if (fdata.lr_register != -1) cache->saved_regs[tdep->ppc_lr_regnum].realreg = fdata.lr_register; /* The PC is found in the link register. */ @@ -3228,7 +3232,8 @@ rs6000_frame_cache (struct frame_info *this_frame, void **this_cache) /* If != 0, fdata.vrsave_offset is the offset from the frame that holds the VRSAVE. */ if (fdata.vrsave_offset != 0) - cache->saved_regs[tdep->ppc_vrsave_regnum].addr = cache->base + fdata.vrsave_offset; + cache->saved_regs[tdep->ppc_vrsave_regnum].addr + = cache->base + fdata.vrsave_offset; if (fdata.alloca_reg < 0) /* If no alloca register used, then fi->frame is the value of the @@ -3950,7 +3955,8 @@ rs6000_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) if (have_spe || have_dfp || have_vsx) { set_gdbarch_pseudo_register_read (gdbarch, rs6000_pseudo_register_read); - set_gdbarch_pseudo_register_write (gdbarch, rs6000_pseudo_register_write); + set_gdbarch_pseudo_register_write (gdbarch, + rs6000_pseudo_register_write); } set_gdbarch_have_nonsteppable_watchpoint (gdbarch, 1); @@ -4008,13 +4014,13 @@ rs6000_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) set_gdbarch_breakpoint_from_pc (gdbarch, rs6000_breakpoint_from_pc); /* The value of symbols of type N_SO and N_FUN maybe null when - it shouldn't be. */ + it shouldn't be. */ set_gdbarch_sofun_address_maybe_missing (gdbarch, 1); /* Handles single stepping of atomic sequences. */ set_gdbarch_software_single_step (gdbarch, ppc_deal_with_atomic_sequence); - /* Not sure on this. FIXMEmgo */ + /* Not sure on this. FIXMEmgo */ set_gdbarch_frame_args_skip (gdbarch, 8); /* Helpers for function argument information. */ @@ -4179,7 +4185,8 @@ powerpc_set_vector_abi (char *args, int from_tty, /* Initialization code. */ -extern initialize_file_ftype _initialize_rs6000_tdep; /* -Wmissing-prototypes */ +/* -Wmissing-prototypes */ +extern initialize_file_ftype _initialize_rs6000_tdep; void _initialize_rs6000_tdep (void) |