diff options
Diffstat (limited to 'gdb/tm-rs6000.h')
| -rw-r--r-- | gdb/tm-rs6000.h | 48 |
1 files changed, 45 insertions, 3 deletions
diff --git a/gdb/tm-rs6000.h b/gdb/tm-rs6000.h index 07ec07b..ce4f212 100644 --- a/gdb/tm-rs6000.h +++ b/gdb/tm-rs6000.h @@ -148,9 +148,12 @@ extern int aix_loadInfoTextIndex; some instructions. */ extern char registers[]; +extern char register_valid []; #define SAVED_PC_AFTER_CALL(frame) \ - (*(int*)®isters[REGISTER_BYTE (LR_REGNUM)]) + (register_valid [LR_REGNUM] ? \ + (*(int*)®isters[REGISTER_BYTE (LR_REGNUM)]) : \ + read_register (LR_REGNUM)) /*#define SAVED_PC_AFTER_CALL(frame) saved_pc_after_call(frame) */ @@ -451,9 +454,48 @@ extern unsigned int rs6000_struct_return_address; This includes special registers such as pc and fp saved in special ways in the stack frame. sp is even more special: the address we return for it IS the sp for the next frame. */ +/* In the following implementation for RS6000, we did *not* save sp. I am + not sure if it will be needed. The following macro takes care of gpr's + and fpr's only. */ + +#define FRAME_FIND_SAVED_REGS(FRAME_INFO, FRAME_SAVED_REGS) \ +{ \ + int frameless, offset, saved_gpr, saved_fpr, ii, frame_addr, func_start; \ + \ + /* find the start of the function and collect info about its frame. */ \ + \ + func_start = get_pc_function_start ((FRAME_INFO)->pc) + FUNCTION_START_OFFSET;\ + function_frame_info (func_start, &frameless, &offset, &saved_gpr, &saved_fpr);\ + bzero (&(FRAME_SAVED_REGS), sizeof (FRAME_SAVED_REGS)); \ + \ + /* if there were any saved registers, figure out parent's stack pointer. */ \ + frame_addr = 0; \ + if (saved_fpr >= 0 || saved_gpr >= 0) { \ + if ((FRAME_INFO)->prev && (FRAME_INFO)->prev->frame) \ + frame_addr = (FRAME_INFO)->prev->frame; \ + else \ + frame_addr = read_memory_integer ((FRAME_INFO)->frame, 4); \ + } \ + \ + /* if != -1, saved_fpr is the smallest number of saved_fpr. All fpr's \ + from saved_fpr to fp31 are saved right underneath caller stack pointer, \ + starting from fp31 first. */ \ + \ + if (saved_fpr >= 0) { \ + for (ii=31; ii >= saved_fpr; --ii) \ + (FRAME_SAVED_REGS).regs [FP0_REGNUM + ii] = frame_addr - ((32 - ii) * 8); \ + frame_addr -= (32 - saved_fpr) * 8; \ + } \ + \ + /* if != -1, saved_gpr is the smallest number of saved_gpr. All gpr's \ + from saved_gpr to gpr31 are saved right under saved fprs, starting \ + from r31 first. */ \ + \ + if (saved_gpr >= 0) \ + for (ii=31; ii >= saved_gpr; --ii) \ + (FRAME_SAVED_REGS).regs [ii] = frame_addr - ((32 - ii) * 4); \ +} -#define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \ - printf ("FIXMEmgo! FRAME_FIND_SAVED_REGS() not implemented!\n") /* Things needed for making the inferior call functions. */ |