* Move config/m68k/tm-m68k.h (FRAME_FIND_SAVED_REGS) to
m68k-tdep.c (m68k_find_saved_regs). Don't duplicate code between 68881 and non-68881 cases. Check for a pair of movel instructions.
This commit is contained in:
Jim Kingdon
parent
45d8db87f0
commit
e7ac0161ce
@ -1,3 +1,10 @@
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<<<<<<< ChangeLog
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Tue Jun 8 14:42:10 1993 Jim Kingdon (kingdon@rtl.cygnus.com)
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* Move config/m68k/tm-m68k.h (FRAME_FIND_SAVED_REGS) to
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m68k-tdep.c (m68k_find_saved_regs). Don't duplicate code between
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68881 and non-68881 cases. Check for a pair of movel instructions.
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=======
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Tue Jun 8 14:52:55 1993 K. Richard Pixley (rich@sendai.cygnus.com)
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First cut at sparc-vxworks targetting.
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@ -7,6 +14,7 @@ Tue Jun 8 14:52:55 1993 K. Richard Pixley (rich@sendai.cygnus.com)
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* remote-eb.c, remote.c: symfile.h requires bfd.h so include it.
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Tue Jun 8 14:42:10 1993 Jim Kingdon (kingdon@rtl.cygnus.com)
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>>>>>>> 1.1342
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* config/m68k/xm-news.h: add "extern int errno".
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@ -359,123 +359,7 @@ extern const struct ext_format ext_format_68881;
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the address we return for it IS the sp for the next frame. */
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#if !defined (FRAME_FIND_SAVED_REGS)
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#if defined (HAVE_68881)
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#define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \
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{ register int regnum; \
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register int regmask; \
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register CORE_ADDR next_addr; \
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register CORE_ADDR pc; \
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int nextinsn; \
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bzero (&frame_saved_regs, sizeof frame_saved_regs); \
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if ((frame_info)->pc >= (frame_info)->frame - CALL_DUMMY_LENGTH - FP_REGNUM*4 - 8*12 - 4 \
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&& (frame_info)->pc <= (frame_info)->frame) \
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{ next_addr = (frame_info)->frame; \
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pc = (frame_info)->frame - CALL_DUMMY_LENGTH - FP_REGNUM * 4 - 8*12 - 4; }\
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else \
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{ pc = get_pc_function_start ((frame_info)->pc); \
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/* Verify we have a link a6 instruction next; \
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if not we lose. If we win, find the address above the saved \
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regs using the amount of storage from the link instruction. */\
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if (044016 == read_memory_integer (pc, 2)) \
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next_addr = (frame_info)->frame + read_memory_integer (pc += 2, 4), pc+=4; \
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else if (047126 == read_memory_integer (pc, 2)) \
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next_addr = (frame_info)->frame + read_memory_integer (pc += 2, 2), pc+=2; \
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else goto lose; \
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/* If have an addal #-n, sp next, adjust next_addr. */ \
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if ((0177777 & read_memory_integer (pc, 2)) == 0157774) \
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next_addr += read_memory_integer (pc += 2, 4), pc += 4; \
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} \
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/* next should be a moveml to (sp) or -(sp) or a movl r,-(sp) */ \
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regmask = read_memory_integer (pc + 2, 2); \
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/* But before that can come an fmovem. Check for it. */ \
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nextinsn = 0xffff & read_memory_integer (pc, 2); \
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if (0xf227 == nextinsn \
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&& (regmask & 0xff00) == 0xe000) \
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{ pc += 4; /* Regmask's low bit is for register fp7, the first pushed */ \
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for (regnum = FP0_REGNUM + 7; regnum >= FP0_REGNUM; regnum--, regmask >>= 1) \
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if (regmask & 1) \
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(frame_saved_regs).regs[regnum] = (next_addr -= 12); \
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regmask = read_memory_integer (pc + 2, 2); } \
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if (0044327 == read_memory_integer (pc, 2)) \
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{ pc += 4; /* Regmask's low bit is for register 0, the first written */ \
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for (regnum = 0; regnum < 16; regnum++, regmask >>= 1) \
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if (regmask & 1) \
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(frame_saved_regs).regs[regnum] = (next_addr += 4) - 4; } \
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else if (0044347 == read_memory_integer (pc, 2)) \
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{ pc += 4; /* Regmask's low bit is for register 15, the first pushed */ \
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for (regnum = 15; regnum >= 0; regnum--, regmask >>= 1) \
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if (regmask & 1) \
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(frame_saved_regs).regs[regnum] = (next_addr -= 4); } \
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else if (0x2f00 == (0xfff0 & read_memory_integer (pc, 2))) \
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{ regnum = 0xf & read_memory_integer (pc, 2); pc += 2; \
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(frame_saved_regs).regs[regnum] = (next_addr -= 4); } \
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/* fmovemx to index of sp may follow. */ \
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regmask = read_memory_integer (pc + 2, 2); \
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nextinsn = 0xffff & read_memory_integer (pc, 2); \
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if (0xf236 == nextinsn \
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&& (regmask & 0xff00) == 0xf000) \
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{ pc += 10; /* Regmask's low bit is for register fp0, the first written */ \
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for (regnum = FP0_REGNUM + 7; regnum >= FP0_REGNUM; regnum--, regmask >>= 1) \
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if (regmask & 1) \
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(frame_saved_regs).regs[regnum] = (next_addr += 12) - 12; \
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regmask = read_memory_integer (pc + 2, 2); } \
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/* clrw -(sp); movw ccr,-(sp) may follow. */ \
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if (0x426742e7 == read_memory_integer (pc, 4)) \
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(frame_saved_regs).regs[PS_REGNUM] = (next_addr -= 4); \
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lose: ; \
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(frame_saved_regs).regs[SP_REGNUM] = (frame_info)->frame + 8; \
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(frame_saved_regs).regs[FP_REGNUM] = (frame_info)->frame; \
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(frame_saved_regs).regs[PC_REGNUM] = (frame_info)->frame + 4; \
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}
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#else /* no 68881. */
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#define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \
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{ register int regnum; \
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register int regmask; \
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register CORE_ADDR next_addr; \
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register CORE_ADDR pc; \
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bzero (&frame_saved_regs, sizeof frame_saved_regs); \
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if ((frame_info)->pc >= (frame_info)->frame - CALL_DUMMY_LENGTH - FP_REGNUM*4 - 4 \
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&& (frame_info)->pc <= (frame_info)->frame) \
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{ next_addr = (frame_info)->frame; \
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pc = (frame_info)->frame - CALL_DUMMY_LENGTH - FP_REGNUM * 4 - 4; }\
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else \
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{ pc = get_pc_function_start ((frame_info)->pc); \
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/* Verify we have a link a6 instruction next; \
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if not we lose. If we win, find the address above the saved \
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regs using the amount of storage from the link instruction. */\
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if (044016 == read_memory_integer (pc, 2)) \
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next_addr = (frame_info)->frame + read_memory_integer (pc += 2, 4), pc+=4; \
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else if (047126 == read_memory_integer (pc, 2)) \
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next_addr = (frame_info)->frame + read_memory_integer (pc += 2, 2), pc+=2; \
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else goto lose; \
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/* If have an addal #-n, sp next, adjust next_addr. */ \
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if ((0177777 & read_memory_integer (pc, 2)) == 0157774) \
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next_addr += read_memory_integer (pc += 2, 4), pc += 4; \
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} \
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/* next should be a moveml to (sp) or -(sp) or a movl r,-(sp) */ \
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regmask = read_memory_integer (pc + 2, 2); \
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if (0044327 == read_memory_integer (pc, 2)) \
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{ pc += 4; /* Regmask's low bit is for register 0, the first written */ \
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for (regnum = 0; regnum < 16; regnum++, regmask >>= 1) \
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if (regmask & 1) \
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(frame_saved_regs).regs[regnum] = (next_addr += 4) - 4; } \
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else if (0044347 == read_memory_integer (pc, 2)) \
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{ pc += 4; /* Regmask's low bit is for register 15, the first pushed */ \
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for (regnum = 15; regnum >= 0; regnum--, regmask >>= 1) \
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if (regmask & 1) \
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(frame_saved_regs).regs[regnum] = (next_addr -= 4); } \
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else if (0x2f00 == (0xfff0 & read_memory_integer (pc, 2))) \
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{ regnum = 0xf & read_memory_integer (pc, 2); pc += 2; \
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(frame_saved_regs).regs[regnum] = (next_addr -= 4); } \
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/* clrw -(sp); movw ccr,-(sp) may follow. */ \
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if (0x426742e7 == read_memory_integer (pc, 4)) \
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(frame_saved_regs).regs[PS_REGNUM] = (next_addr -= 4); \
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lose: ; \
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(frame_saved_regs).regs[SP_REGNUM] = (frame_info)->frame + 8; \
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(frame_saved_regs).regs[FP_REGNUM] = (frame_info)->frame; \
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(frame_saved_regs).regs[PC_REGNUM] = (frame_info)->frame + 4; \
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}
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#endif /* no 68881. */
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#define FRAME_FIND_SAVED_REGS(fi,fsr) m68k_find_saved_regs ((fi), &(fsr))
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#endif /* no FIND_FRAME_SAVED_REGS. */
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