From: Richard Earnshaw Date: Mon, 21 Jan 2002 16:27:42 +0000 (+0000) Subject: Richard Earnshaw X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=c3b4394c3a649e2c04f792da63b67b4866b6b5f2;p=binutils-gdb.git Richard Earnshaw and Kevin Buettner Convert arm targets to new FRAME interface. * arm-tdep.c (struct frame_extra_info): Remove fsr. (arm_frame_find_save_regs): Delete. (arm_frame_init_saved_regs): New. (arm_init_extra_frame_info): Alloacte saved_regs as required. Allocate extra_info as required. Convert all uses of fsr.regs to use saved_regs, similarly all uses of EXTRA_FRAME_INFO fields to use extra_info. (thumb_scan_prologue, arm_scan_prologue, arm_find_callers_reg) (arm_frame_chain, arm_frame_saved_pc, arm_pop_frame): Likewise. (check_prologue_cache, save_prologue_cache): Likewise. (_initialize_arm_tdep): Ensure prologue_cache is correctly set up. * config/arm/tm-arm.h (EXTRA_FRAME_INFO): Delete. (FRAME_FIND_SAVED_REGS): Delete. (arm_frame_find_saved_regs): Delete prototype. (arm_frame_init_saved_regs): New prototype. (FRAME_INIT_SAVED_REGS): Define. --- diff --git a/gdb/ChangeLog b/gdb/ChangeLog index b8e28c2880a..b2cac540f15 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,24 @@ +2002-01-21 Richard Earnshaw + Kevin Buettner + + Convert arm targets to new FRAME interface. + * arm-tdep.c (struct frame_extra_info): Remove fsr. + (arm_frame_find_save_regs): Delete. + (arm_frame_init_saved_regs): New. + (arm_init_extra_frame_info): Alloacte saved_regs as required. + Allocate extra_info as required. Convert all uses of fsr.regs + to use saved_regs, similarly all uses of EXTRA_FRAME_INFO fields + to use extra_info. + (thumb_scan_prologue, arm_scan_prologue, arm_find_callers_reg) + (arm_frame_chain, arm_frame_saved_pc, arm_pop_frame): Likewise. + (check_prologue_cache, save_prologue_cache): Likewise. + (_initialize_arm_tdep): Ensure prologue_cache is correctly set up. + * config/arm/tm-arm.h (EXTRA_FRAME_INFO): Delete. + (FRAME_FIND_SAVED_REGS): Delete. + (arm_frame_find_saved_regs): Delete prototype. + (arm_frame_init_saved_regs): New prototype. + (FRAME_INIT_SAVED_REGS): Define. + 2002-01-20 Andrew Cagney * config/arc/tm-arc.h (IEEE_FLOAT): Delete. diff --git a/gdb/arm-tdep.c b/gdb/arm-tdep.c index 74a61afa19f..4e57ec1d166 100644 --- a/gdb/arm-tdep.c +++ b/gdb/arm-tdep.c @@ -1,6 +1,6 @@ /* Common target dependent code for GDB on ARM systems. Copyright 1988, 1989, 1991, 1992, 1993, 1995, 1996, 1998, 1999, 2000, - 2001 Free Software Foundation, Inc. + 2001, 2002 Free Software Foundation, Inc. This file is part of GDB. @@ -107,12 +107,11 @@ static void convert_from_extended (void *ptr, void *dbl); we're still in the prologue of a function with a frame) */ struct frame_extra_info - { - struct frame_saved_regs fsr; - int framesize; - int frameoffset; - int framereg; - }; +{ + int framesize; + int frameoffset; + int framereg; +}; /* Addresses for calling Thumb functions have the bit 0 set. Here are some macros to test, set, or clear bit 0 of addresses. */ @@ -534,7 +533,7 @@ thumb_scan_prologue (struct frame_info *fi) frame pointer, adjust the stack pointer, and save registers. Do this until all basic prolog instructions are found. */ - fi->framesize = 0; + fi->extra_info->framesize = 0; for (current_pc = prologue_start; (current_pc < prologue_end) && ((findmask & 7) != 7); current_pc += 2) @@ -557,8 +556,9 @@ thumb_scan_prologue (struct frame_info *fi) for (regno = LR_REGNUM; regno >= 0; regno--) if (mask & (1 << regno)) { - fi->framesize += 4; - fi->fsr.regs[saved_reg[regno]] = -(fi->framesize); + fi->extra_info->framesize += 4; + fi->saved_regs[saved_reg[regno]] = + -(fi->extra_info->framesize); saved_reg[regno] = regno; /* reset saved register map */ } } @@ -572,22 +572,23 @@ thumb_scan_prologue (struct frame_info *fi) offset = (insn & 0x7f) << 2; /* get scaled offset */ if (insn & 0x80) /* is it signed? (==subtracting) */ { - fi->frameoffset += offset; + fi->extra_info->frameoffset += offset; offset = -offset; } - fi->framesize -= offset; + fi->extra_info->framesize -= offset; } else if ((insn & 0xff00) == 0xaf00) /* add r7, sp, #imm */ { findmask |= 2; /* setting of r7 found */ - fi->framereg = THUMB_FP_REGNUM; - fi->frameoffset = (insn & 0xff) << 2; /* get scaled offset */ + fi->extra_info->framereg = THUMB_FP_REGNUM; + /* get scaled offset */ + fi->extra_info->frameoffset = (insn & 0xff) << 2; } else if (insn == 0x466f) /* mov r7, sp */ { findmask |= 2; /* setting of r7 found */ - fi->framereg = THUMB_FP_REGNUM; - fi->frameoffset = 0; + fi->extra_info->framereg = THUMB_FP_REGNUM; + fi->extra_info->frameoffset = 0; saved_reg[THUMB_FP_REGNUM] = SP_REGNUM; } else if ((insn & 0xffc0) == 0x4640) /* mov r0-r7, r8-r15 */ @@ -627,11 +628,11 @@ check_prologue_cache (struct frame_info *fi) if (fi->pc == prologue_cache.pc) { - fi->framereg = prologue_cache.framereg; - fi->framesize = prologue_cache.framesize; - fi->frameoffset = prologue_cache.frameoffset; - for (i = 0; i < NUM_REGS; i++) - fi->fsr.regs[i] = prologue_cache.fsr.regs[i]; + fi->extra_info->framereg = prologue_cache.extra_info->framereg; + fi->extra_info->framesize = prologue_cache.extra_info->framesize; + fi->extra_info->frameoffset = prologue_cache.extra_info->frameoffset; + for (i = 0; i < NUM_REGS + NUM_PSEUDO_REGS; i++) + fi->saved_regs[i] = prologue_cache.saved_regs[i]; return 1; } else @@ -647,12 +648,12 @@ save_prologue_cache (struct frame_info *fi) int i; prologue_cache.pc = fi->pc; - prologue_cache.framereg = fi->framereg; - prologue_cache.framesize = fi->framesize; - prologue_cache.frameoffset = fi->frameoffset; + prologue_cache.extra_info->framereg = fi->extra_info->framereg; + prologue_cache.extra_info->framesize = fi->extra_info->framesize; + prologue_cache.extra_info->frameoffset = fi->extra_info->frameoffset; - for (i = 0; i < NUM_REGS; i++) - prologue_cache.fsr.regs[i] = fi->fsr.regs[i]; + for (i = 0; i < NUM_REGS + NUM_PSEUDO_REGS; i++) + prologue_cache.saved_regs[i] = fi->saved_regs[i]; } @@ -735,9 +736,9 @@ arm_scan_prologue (struct frame_info *fi) return; /* Assume there is no frame until proven otherwise. */ - fi->framereg = SP_REGNUM; - fi->framesize = 0; - fi->frameoffset = 0; + fi->extra_info->framereg = SP_REGNUM; + fi->extra_info->framesize = 0; + fi->extra_info->frameoffset = 0; /* Check for Thumb prologue. */ if (arm_pc_is_thumb (fi->pc)) @@ -840,7 +841,7 @@ arm_scan_prologue (struct frame_info *fi) if (mask & (1 << regno)) { sp_offset -= 4; - fi->fsr.regs[regno] = sp_offset; + fi->saved_regs[regno] = sp_offset; } } else if ((insn & 0xfffff000) == 0xe24cb000) /* sub fp, ip #n */ @@ -849,7 +850,7 @@ arm_scan_prologue (struct frame_info *fi) unsigned rot = (insn & 0xf00) >> 7; /* rotate amount */ imm = (imm >> rot) | (imm << (32 - rot)); fp_offset = -imm; - fi->framereg = FP_REGNUM; + fi->extra_info->framereg = FP_REGNUM; } else if ((insn & 0xfffff000) == 0xe24dd000) /* sub sp, sp #n */ { @@ -862,7 +863,7 @@ arm_scan_prologue (struct frame_info *fi) { sp_offset -= 12; regno = F0_REGNUM + ((insn >> 12) & 0x07); - fi->fsr.regs[regno] = sp_offset; + fi->saved_regs[regno] = sp_offset; } else if ((insn & 0xffbf0fff) == 0xec2d0200) /* sfmfd f0, 4, [sp!] */ { @@ -889,7 +890,7 @@ arm_scan_prologue (struct frame_info *fi) for (; fp_start_reg < fp_bound_reg; fp_start_reg++) { sp_offset -= 12; - fi->fsr.regs[fp_start_reg++] = sp_offset; + fi->saved_regs[fp_start_reg++] = sp_offset; } } else if ((insn & 0xf0000000) != 0xe0000000) @@ -905,11 +906,11 @@ arm_scan_prologue (struct frame_info *fi) /* The frame size is just the negative of the offset (from the original SP) of the last thing thing we pushed on the stack. The frame offset is [new FP] - [new SP]. */ - fi->framesize = -sp_offset; - if (fi->framereg == FP_REGNUM) - fi->frameoffset = fp_offset - sp_offset; + fi->extra_info->framesize = -sp_offset; + if (fi->extra_info->framereg == FP_REGNUM) + fi->extra_info->frameoffset = fp_offset - sp_offset; else - fi->frameoffset = 0; + fi->extra_info->frameoffset = 0; save_prologue_cache (fi); } @@ -931,8 +932,8 @@ arm_find_callers_reg (struct frame_info *fi, int regnum) return generic_read_register_dummy (fi->pc, fi->frame, regnum); else #endif - if (fi->fsr.regs[regnum] != 0) - return read_memory_integer (fi->fsr.regs[regnum], + if (fi->saved_regs[regnum] != 0) + return read_memory_integer (fi->saved_regs[regnum], REGISTER_RAW_SIZE (regnum)); return read_register (regnum); } @@ -975,8 +976,7 @@ arm_frame_chain (struct frame_info *fi) return 0; /* in _start fn, don't chain further */ #endif CORE_ADDR caller_pc, fn_start; - struct frame_info caller_fi; - int framereg = fi->framereg; + int framereg = fi->extra_info->framereg; if (fi->pc < LOWEST_PC) return 0; @@ -991,12 +991,31 @@ arm_frame_chain (struct frame_info *fi) the frame register of the caller is different from ours. So we must scan the prologue of the caller to determine its frame register number. */ + /* XXX Fixme, we should try to do this without creating a temporary + caller_fi. */ if (arm_pc_is_thumb (caller_pc) != arm_pc_is_thumb (fi->pc)) { + struct frame_info caller_fi; + struct cleanup *old_chain; + + /* Create a temporary frame suitable for scanning the caller's + prologue. (Ugh.) */ memset (&caller_fi, 0, sizeof (caller_fi)); + caller_fi.extra_info = (struct frame_extra_info *) + xcalloc (1, sizeof (struct frame_extra_info)); + old_chain = make_cleanup (xfree, caller_fi.extra_info); + caller_fi.saved_regs = (CORE_ADDR *) + xcalloc (1, SIZEOF_FRAME_SAVED_REGS); + make_cleanup (xfree, caller_fi.saved_regs); + + /* Now, scan the prologue and obtain the frame register. */ caller_fi.pc = caller_pc; arm_scan_prologue (&caller_fi); - framereg = caller_fi.framereg; + framereg = caller_fi.extra_info->framereg; + + /* Deallocate the storage associated with the temporary frame + created above. */ + do_cleanups (old_chain); } /* If the caller used a frame register, return its value. @@ -1004,7 +1023,7 @@ arm_frame_chain (struct frame_info *fi) if (framereg == FP_REGNUM || framereg == THUMB_FP_REGNUM) return arm_find_callers_reg (fi, framereg); else - return fi->frame + fi->framesize; + return fi->frame + fi->extra_info->framesize; } /* This function actually figures out the frame address for a given pc @@ -1022,10 +1041,20 @@ arm_init_extra_frame_info (int fromleaf, struct frame_info *fi) int reg; CORE_ADDR sp; + if (fi->saved_regs == NULL) + frame_saved_regs_zalloc (fi); + + fi->extra_info = (struct frame_extra_info *) + frame_obstack_alloc (sizeof (struct frame_extra_info)); + + fi->extra_info->framesize = 0; + fi->extra_info->frameoffset = 0; + fi->extra_info->framereg = 0; + if (fi->next) fi->pc = FRAME_SAVED_PC (fi->next); - memset (fi->fsr.regs, '\000', sizeof fi->fsr.regs); + memset (fi->saved_regs, '\000', sizeof fi->saved_regs); #if 0 /* FIXME: enable this code if we convert to new call dummy scheme. */ if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame)) @@ -1033,8 +1062,8 @@ arm_init_extra_frame_info (int fromleaf, struct frame_info *fi) /* We need to setup fi->frame here because run_stack_dummy gets it wrong by assuming it's always FP. */ fi->frame = generic_read_register_dummy (fi->pc, fi->frame, SP_REGNUM); - fi->framesize = 0; - fi->frameoffset = 0; + fi->extra_info->framesize = 0; + fi->extra_info->frameoffset = 0; return; } else @@ -1045,7 +1074,8 @@ arm_init_extra_frame_info (int fromleaf, struct frame_info *fi) if (!fi->next) sp = read_sp(); else - sp = fi->next->frame - fi->next->frameoffset + fi->next->framesize; + sp = (fi->next->frame - fi->next->extra_info->frameoffset + + fi->next->extra_info->framesize); /* Determine whether or not we're in a sigtramp frame. Unfortunately, it isn't sufficient to test @@ -1063,14 +1093,15 @@ arm_init_extra_frame_info (int fromleaf, struct frame_info *fi) && (fi->signal_handler_caller || IN_SIGTRAMP (fi->pc, (char *)0))) { for (reg = 0; reg < NUM_REGS; reg++) - fi->fsr.regs[reg] = SIGCONTEXT_REGISTER_ADDRESS (sp, fi->pc, reg); + fi->saved_regs[reg] = SIGCONTEXT_REGISTER_ADDRESS (sp, fi->pc, reg); /* FIXME: What about thumb mode? */ - fi->framereg = SP_REGNUM; - fi->frame = read_memory_integer (fi->fsr.regs[fi->framereg], - REGISTER_RAW_SIZE (fi->framereg)); - fi->framesize = 0; - fi->frameoffset = 0; + fi->extra_info->framereg = SP_REGNUM; + fi->frame = + read_memory_integer (fi->saved_regs[fi->extra_info->framereg], + REGISTER_RAW_SIZE (fi->extra_info->framereg)); + fi->extra_info->framesize = 0; + fi->extra_info->frameoffset = 0; } else if (PC_IN_CALL_DUMMY (fi->pc, sp, fi->frame)) @@ -1082,19 +1113,19 @@ arm_init_extra_frame_info (int fromleaf, struct frame_info *fi) rp = fi->frame - REGISTER_SIZE; /* Fill in addresses of saved registers. */ - fi->fsr.regs[PS_REGNUM] = rp; + fi->saved_regs[PS_REGNUM] = rp; rp -= REGISTER_RAW_SIZE (PS_REGNUM); for (reg = PC_REGNUM; reg >= 0; reg--) { - fi->fsr.regs[reg] = rp; + fi->saved_regs[reg] = rp; rp -= REGISTER_RAW_SIZE (reg); } - callers_sp = read_memory_integer (fi->fsr.regs[SP_REGNUM], + callers_sp = read_memory_integer (fi->saved_regs[SP_REGNUM], REGISTER_RAW_SIZE (SP_REGNUM)); - fi->framereg = FP_REGNUM; - fi->framesize = callers_sp - sp; - fi->frameoffset = fi->frame - sp; + fi->extra_info->framereg = FP_REGNUM; + fi->extra_info->framesize = callers_sp - sp; + fi->extra_info->frameoffset = fi->frame - sp; } else { @@ -1102,14 +1133,16 @@ arm_init_extra_frame_info (int fromleaf, struct frame_info *fi) if (!fi->next) /* this is the innermost frame? */ - fi->frame = read_register (fi->framereg); - else if (fi->framereg == FP_REGNUM || fi->framereg == THUMB_FP_REGNUM) + fi->frame = read_register (fi->extra_info->framereg); + else if (fi->extra_info->framereg == FP_REGNUM + || fi->extra_info->framereg == THUMB_FP_REGNUM) { /* not the innermost frame */ /* If we have an FP, the callee saved it. */ - if (fi->next->fsr.regs[fi->framereg] != 0) + if (fi->next->saved_regs[fi->extra_info->framereg] != 0) fi->frame = - read_memory_integer (fi->next->fsr.regs[fi->framereg], 4); + read_memory_integer (fi->next + ->saved_regs[fi->extra_info->framereg], 4); else if (fromleaf) /* If we were called by a frameless fn. then our frame is still in the frame pointer register on the board... */ @@ -1119,8 +1152,9 @@ arm_init_extra_frame_info (int fromleaf, struct frame_info *fi) /* Calculate actual addresses of saved registers using offsets determined by arm_scan_prologue. */ for (reg = 0; reg < NUM_REGS; reg++) - if (fi->fsr.regs[reg] != 0) - fi->fsr.regs[reg] += fi->frame + fi->framesize - fi->frameoffset; + if (fi->saved_regs[reg] != 0) + fi->saved_regs[reg] += (fi->frame + fi->extra_info->framesize + - fi->extra_info->frameoffset); } } @@ -1141,9 +1175,11 @@ arm_frame_saved_pc (struct frame_info *fi) return generic_read_register_dummy (fi->pc, fi->frame, PC_REGNUM); else #endif - if (PC_IN_CALL_DUMMY (fi->pc, fi->frame - fi->frameoffset, fi->frame)) + if (PC_IN_CALL_DUMMY (fi->pc, fi->frame - fi->extra_info->frameoffset, + fi->frame)) { - return read_memory_integer (fi->fsr.regs[PC_REGNUM], REGISTER_RAW_SIZE (PC_REGNUM)); + return read_memory_integer (fi->saved_regs[PC_REGNUM], + REGISTER_RAW_SIZE (PC_REGNUM)); } else { @@ -1167,10 +1203,13 @@ arm_target_read_fp (void) /* Calculate the frame offsets of the saved registers (ARM version). */ void -arm_frame_find_saved_regs (struct frame_info *fi, - struct frame_saved_regs *regaddr) +arm_frame_init_saved_regs (struct frame_info *fip) { - memcpy (regaddr, &fi->fsr, sizeof (struct frame_saved_regs)); + + if (fip->saved_regs) + return; + + arm_init_extra_frame_info (0, fip); } void @@ -1424,12 +1463,13 @@ arm_pop_frame (void) { int regnum; struct frame_info *frame = get_current_frame (); - CORE_ADDR old_SP = frame->frame - frame->frameoffset + frame->framesize; + CORE_ADDR old_SP = (frame->frame - frame->extra_info->frameoffset + + frame->extra_info->framesize); for (regnum = 0; regnum < NUM_REGS; regnum++) - if (frame->fsr.regs[regnum] != 0) + if (frame->saved_regs[regnum] != 0) write_register (regnum, - read_memory_integer (frame->fsr.regs[regnum], + read_memory_integer (frame->saved_regs[regnum], REGISTER_RAW_SIZE (regnum))); write_register (PC_REGNUM, FRAME_SAVED_PC (frame)); @@ -2240,6 +2280,12 @@ The valid values are:\n"); add_com ("othernames", class_obscure, arm_othernames, "Switch to the next set of register names."); + + /* Fill in the prologue_cache fields. */ + prologue_cache.extra_info = (struct frame_extra_info *) + xcalloc (1, sizeof (struct frame_extra_info)); + prologue_cache.saved_regs = (CORE_ADDR *) + xcalloc (1, SIZEOF_FRAME_SAVED_REGS); } /* Test whether the coff symbol specific value corresponds to a Thumb diff --git a/gdb/config/arm/tm-arm.h b/gdb/config/arm/tm-arm.h index cd20548f6f7..8a0d61353ff 100644 --- a/gdb/config/arm/tm-arm.h +++ b/gdb/config/arm/tm-arm.h @@ -1,6 +1,6 @@ /* Definitions to target GDB to ARM targets. Copyright 1986, 1987, 1988, 1989, 1991, 1993, 1994, 1995, 1996, 1997, - 1998, 1999, 2000 Free Software Foundation, Inc. + 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc. This file is part of GDB. @@ -316,18 +316,6 @@ extern void convert_to_extended (void *dbl, void *ptr); #define VARIABLES_INSIDE_BLOCK(desc, gcc_p) (!(gcc_p)) -/* Define other aspects of the stack frame. We keep the offsets of - all saved registers, 'cause we need 'em a lot! We also keep the - current size of the stack frame, and the offset of the frame - pointer from the stack pointer (for frameless functions, and when - we're still in the prologue of a function with a frame) */ - -#define EXTRA_FRAME_INFO \ - struct frame_saved_regs fsr; \ - int framesize; \ - int frameoffset; \ - int framereg; - extern void arm_init_extra_frame_info (int fromleaf, struct frame_info * fi); #define INIT_EXTRA_FRAME_INFO(fromleaf, fi) \ arm_init_extra_frame_info ((fromleaf), (fi)) @@ -398,13 +386,9 @@ extern CORE_ADDR arm_frame_saved_pc (struct frame_info *); ways in the stack frame. sp is even more special: the address we return for it IS the sp for the next frame. */ -struct frame_saved_regs; -struct frame_info; -void arm_frame_find_saved_regs (struct frame_info * fi, - struct frame_saved_regs * fsr); - -#define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \ - arm_frame_find_saved_regs (frame_info, &(frame_saved_regs)); +void arm_frame_init_saved_regs (struct frame_info *); +#define FRAME_INIT_SAVED_REGS(frame_info) \ + arm_frame_init_saved_regs (frame_info); /* Things needed for making the inferior call functions. */