From: Mark Alexander Date: Mon, 27 Apr 1998 22:19:46 +0000 (+0000) Subject: * config/sparc/tm-sparc.h (CALL_DUMMY): Shorten it drastically, X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=07f4558723c6994b360261786b4bdd2e7babcd97;p=binutils-gdb.git * config/sparc/tm-sparc.h (CALL_DUMMY): Shorten it drastically, make it work on the simulator. (FIX_CALL_DUMMY): Convert to function call instead of inline code. (sparc_fix_call_dummy): Declare. * sparc-tdep.c (sparc_fix_call_dummy): New function, taken from old FIX_CALL_DUMMY macro, with additional fixes for simulator. (sparc_push_dummy_frame): Set registers differently on simulator to prevent corrupted register window save areas. --- diff --git a/gdb/ChangeLog b/gdb/ChangeLog index dad132da3a2..372cd591fe8 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,14 @@ +Mon Apr 27 14:32:21 1998 Mark Alexander + + * config/sparc/tm-sparc.h (CALL_DUMMY): Shorten it drastically, + make it work on the simulator. + (FIX_CALL_DUMMY): Convert to function call instead of inline code. + (sparc_fix_call_dummy): Declare. + * sparc-tdep.c (sparc_fix_call_dummy): New function, taken from + old FIX_CALL_DUMMY macro, with additional fixes for simulator. + (sparc_push_dummy_frame): Set registers differently on simulator + to prevent corrupted register window save areas. + Mon Apr 27 13:46:40 1998 John Metzler * rom68k-rom.c (_initialize_rom68k init_rom68k_cmds): @@ -11,8 +22,8 @@ Mon Apr 27 13:46:40 1998 John Metzler * remote-est.c ( _initialize_est init_est_cmds) : * remote-hms.c ( _initialize_remote_hms init_hms_cmds) : Convert all static initializations of monitor ops structures to - executable initializations in oreer tat additions to the data structure - definition can me made without repeating this editing exercise. + executable initializations in order that additions to the data structure + definition can be made without repeating this editing exercise. Mon Apr 27 10:43:04 1998 Jason Molenda (crash@bugshack.cygnus.com) diff --git a/gdb/config/sparc/tm-sparc.h b/gdb/config/sparc/tm-sparc.h index a585f916f05..618fce49e4f 100644 --- a/gdb/config/sparc/tm-sparc.h +++ b/gdb/config/sparc/tm-sparc.h @@ -465,116 +465,63 @@ extern CORE_ADDR sparc_frame_saved_pc PARAMS ((struct frame_info *)); #define POP_FRAME sparc_pop_frame () void sparc_push_dummy_frame PARAMS ((void)), sparc_pop_frame PARAMS ((void)); + /* This sequence of words is the instructions - save %sp,-0x140,%sp - std %f30,[%fp-0x08] - std %f28,[%fp-0x10] - std %f26,[%fp-0x18] - std %f24,[%fp-0x20] - std %f22,[%fp-0x28] - std %f20,[%fp-0x30] - std %f18,[%fp-0x38] - std %f16,[%fp-0x40] - std %f14,[%fp-0x48] - std %f12,[%fp-0x50] - std %f10,[%fp-0x58] - std %f8,[%fp-0x60] - std %f6,[%fp-0x68] - std %f4,[%fp-0x70] - std %f2,[%fp-0x78] - std %f0,[%fp-0x80] - std %g6,[%fp-0x88] - std %g4,[%fp-0x90] - std %g2,[%fp-0x98] - std %g0,[%fp-0xa0] - std %i6,[%fp-0xa8] - std %i4,[%fp-0xb0] - std %i2,[%fp-0xb8] - std %i0,[%fp-0xc0] - nop ! stcsr [%fp-0xc4] - nop ! stfsr [%fp-0xc8] - nop ! wr %npc,[%fp-0xcc] - nop ! wr %pc,[%fp-0xd0] - rd %tbr,%o0 - st %o0,[%fp-0xd4] - rd %wim,%o1 - st %o0,[%fp-0xd8] - rd %psr,%o0 - st %o0,[%fp-0xdc] - rd %y,%o0 - st %o0,[%fp-0xe0] - - /..* The arguments are pushed at this point by GDB; - no code is needed in the dummy for this. - The CALL_DUMMY_START_OFFSET gives the position of - the following ld instruction. *../ - - ld [%sp+0x58],%o5 - ld [%sp+0x54],%o4 - ld [%sp+0x50],%o3 - ld [%sp+0x4c],%o2 - ld [%sp+0x48],%o1 - call 0x00000000 - ld [%sp+0x44],%o0 - nop - ta 1 - nop - - note that this is 192 bytes, which is a multiple of 8 (not only 4) bytes. - note that the `call' insn is a relative, not an absolute call. - note that the `nop' at the end is needed to keep the trap from - clobbering things (if NPC pointed to garbage instead). - -We actually start executing at the `sethi', since the pushing of the -registers (as arguments) is done by PUSH_DUMMY_FRAME. If this were -real code, the arguments for the function called by the CALL would be -pushed between the list of ST insns and the CALL, and we could allow -it to execute through. But the arguments have to be pushed by GDB -after the PUSH_DUMMY_FRAME is done, and we cannot allow these ST -insns to be performed again, lest the registers saved be taken for -arguments. */ - -#define CALL_DUMMY { 0x9de3bee0, 0xfd3fbff8, 0xf93fbff0, 0xf53fbfe8, \ - 0xf13fbfe0, 0xed3fbfd8, 0xe93fbfd0, 0xe53fbfc8, \ - 0xe13fbfc0, 0xdd3fbfb8, 0xd93fbfb0, 0xd53fbfa8, \ - 0xd13fbfa0, 0xcd3fbf98, 0xc93fbf90, 0xc53fbf88, \ - 0xc13fbf80, 0xcc3fbf78, 0xc83fbf70, 0xc43fbf68, \ - 0xc03fbf60, 0xfc3fbf58, 0xf83fbf50, 0xf43fbf48, \ - 0xf03fbf40, 0x01000000, 0x01000000, 0x01000000, \ - 0x01000000, 0x91580000, 0xd027bf50, 0x93500000, \ - 0xd027bf4c, 0x91480000, 0xd027bf48, 0x91400000, \ - 0xd027bf44, 0xda03a058, 0xd803a054, 0xd603a050, \ - 0xd403a04c, 0xd203a048, 0x40000000, 0xd003a044, \ - 0x01000000, 0x91d02001, 0x01000000, 0x01000000} - -#define CALL_DUMMY_LENGTH 192 - -#define CALL_DUMMY_START_OFFSET 148 - -#define CALL_DUMMY_BREAKPOINT_OFFSET (CALL_DUMMY_START_OFFSET + (8 * 4)) + 0: mov %g1, %fp + 4: save %sp, %g0, %sp + 8: mov %g2, %fp +12: mov %g3, %i7 +16: ld [%sp+0x58],%o5 +20: ld [%sp+0x54],%o4 +24: ld [%sp+0x50],%o3 +28: ld [%sp+0x4c],%o2 +32: ld [%sp+0x48],%o1 +36: call 0x00000000 +40: ld [%sp+0x44],%o0 +44: nop +48: ta 1 +52: nop + + NOTES: + * the first four instructions are necessary only on the simulator. + * this is a multiple of 8 (not only 4) bytes. + * the `call' insn is a relative, not an absolute call. + * the `nop' at the end is needed to keep the trap from + clobbering things (if NPC pointed to garbage instead). +*/ + +#define CALL_DUMMY { 0xbc100001, 0x9de38000, 0xbc100002, 0xbe100003, \ + 0xda03a058, 0xd803a054, 0xd603a050, 0xd403a04c, \ + 0xd203a048, 0x40000000, 0xd003a044, 0x01000000, \ + 0x91d02001, 0x01000000 } + + +/* Size of the call dummy in bytes. */ + +#define CALL_DUMMY_LENGTH 56 + +/* Offset within call dummy of first instruction to execute. */ + +#define CALL_DUMMY_START_OFFSET 0 + +/* Offset within CALL_DUMMY of the 'call' instruction. */ + +#define CALL_DUMMY_CALL_OFFSET (CALL_DUMMY_START_OFFSET + 36) + +/* Offset within CALL_DUMMY of the 'ta 1' instruction. */ + +#define CALL_DUMMY_BREAKPOINT_OFFSET (CALL_DUMMY_START_OFFSET + 48) #define CALL_DUMMY_STACK_ADJUST 68 /* Insert the specified number of args and function address - into a call sequence of the above form stored at DUMMYNAME. - - For structs and unions, if the function was compiled with Sun cc, - it expects 'unimp' after the call. But gcc doesn't use that - (twisted) convention. So leave a nop there for gcc (FIX_CALL_DUMMY - can assume it is operating on a pristine CALL_DUMMY, not one that - has already been customized for a different function). */ - -#define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p) \ -{ \ - store_unsigned_integer (dummyname + 168, 4, \ - (0x40000000 \ - | (((fun - (pc + 168)) >> 2) & 0x3fffffff))); \ - if (!gcc_p \ - && (TYPE_CODE (type) == TYPE_CODE_STRUCT \ - || TYPE_CODE (type) == TYPE_CODE_UNION)) \ - store_unsigned_integer (dummyname + 176, 4, TYPE_LENGTH (type) & 0x1fff); \ -} + into a call sequence of the above form stored at DUMMYNAME. */ + +#define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p) \ + sparc_fix_call_dummy (dummyname, pc, fun, type, gcc_p) +void sparc_fix_call_dummy PARAMS ((char *dummy, CORE_ADDR pc, CORE_ADDR fun, + struct type *value_type, int using_gcc)); /* The Sparc returns long doubles on the stack. */