diff options
Diffstat (limited to 'gcc/frame.c')
| -rw-r--r-- | gcc/frame.c | 24 |
1 files changed, 16 insertions, 8 deletions
diff --git a/gcc/frame.c b/gcc/frame.c index 688355a..cfd979b 100644 --- a/gcc/frame.c +++ b/gcc/frame.c @@ -694,11 +694,16 @@ execute_cfa_insn (void *p, struct frame_state_internal *state, { reg = (insn & 0x3f); p = decode_uleb128 (p, &offset); - offset *= info->data_align; - state->s.saved[reg] = REG_SAVED_OFFSET; - state->s.reg_or_offset[reg] = offset; if (reg == state->s.cfa_reg) - state->s.cfa_saved = 1; + /* Don't record anything about this register; it's only used to + reload SP in the epilogue. We don't want to copy in SP + values for outer frames; we handle restoring SP specially. */; + else + { + offset *= info->data_align; + state->s.saved[reg] = REG_SAVED_OFFSET; + state->s.reg_or_offset[reg] = offset; + } } else if (insn & DW_CFA_restore) { @@ -727,11 +732,14 @@ execute_cfa_insn (void *p, struct frame_state_internal *state, case DW_CFA_offset_extended: p = decode_uleb128 (p, ®); p = decode_uleb128 (p, &offset); - offset *= info->data_align; - state->s.saved[reg] = REG_SAVED_OFFSET; - state->s.reg_or_offset[reg] = offset; if (reg == state->s.cfa_reg) - state->s.cfa_saved = 1; + /* Don't record anything; see above. */; + else + { + offset *= info->data_align; + state->s.saved[reg] = REG_SAVED_OFFSET; + state->s.reg_or_offset[reg] = offset; + } break; case DW_CFA_restore_extended: p = decode_uleb128 (p, ®); |