diff options
Diffstat (limited to 'gcc/frame-dwarf2.c')
| -rw-r--r-- | gcc/frame-dwarf2.c | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/gcc/frame-dwarf2.c b/gcc/frame-dwarf2.c index fb2e9fb6159..52db16f577e 100644 --- a/gcc/frame-dwarf2.c +++ b/gcc/frame-dwarf2.c @@ -466,6 +466,108 @@ extract_cie_info (fde *f, struct cie_info *c) return p; } +/* Decode a DW_OP stack operation. */ + +static void * +decode_stack_op (unsigned char *buf, struct frame_state *state) +{ + enum dwarf_location_atom op; + int offset; + + op = *buf++; + switch (op) + { + case DW_OP_reg0: + case DW_OP_reg1: + case DW_OP_reg2: + case DW_OP_reg3: + case DW_OP_reg4: + case DW_OP_reg5: + case DW_OP_reg6: + case DW_OP_reg7: + case DW_OP_reg8: + case DW_OP_reg9: + case DW_OP_reg10: + case DW_OP_reg11: + case DW_OP_reg12: + case DW_OP_reg13: + case DW_OP_reg14: + case DW_OP_reg15: + case DW_OP_reg16: + case DW_OP_reg17: + case DW_OP_reg18: + case DW_OP_reg19: + case DW_OP_reg20: + case DW_OP_reg21: + case DW_OP_reg22: + case DW_OP_reg23: + case DW_OP_reg24: + case DW_OP_reg25: + case DW_OP_reg26: + case DW_OP_reg27: + case DW_OP_reg28: + case DW_OP_reg29: + case DW_OP_reg30: + case DW_OP_reg31: + state->cfa_reg = op - DW_OP_reg0; + break; + case DW_OP_regx: + buf = decode_sleb128 (buf, &offset); + state->cfa_reg = offset; + case DW_OP_breg0: + case DW_OP_breg1: + case DW_OP_breg2: + case DW_OP_breg3: + case DW_OP_breg4: + case DW_OP_breg5: + case DW_OP_breg6: + case DW_OP_breg7: + case DW_OP_breg8: + case DW_OP_breg9: + case DW_OP_breg10: + case DW_OP_breg11: + case DW_OP_breg12: + case DW_OP_breg13: + case DW_OP_breg14: + case DW_OP_breg15: + case DW_OP_breg16: + case DW_OP_breg17: + case DW_OP_breg18: + case DW_OP_breg19: + case DW_OP_breg20: + case DW_OP_breg21: + case DW_OP_breg22: + case DW_OP_breg23: + case DW_OP_breg24: + case DW_OP_breg25: + case DW_OP_breg26: + case DW_OP_breg27: + case DW_OP_breg28: + case DW_OP_breg29: + case DW_OP_breg30: + case DW_OP_breg31: + state->cfa_reg = op - DW_OP_breg0; + buf = decode_sleb128 (buf, &offset); + state->base_offset = offset; + break; + case DW_OP_bregx: + buf = decode_sleb128 (buf, &offset); + state->cfa_reg = offset; + buf = decode_sleb128 (buf, &offset); + state->base_offset = offset; + break; + case DW_OP_deref: + state->indirect = 1; + break; + case DW_OP_plus_uconst: + buf = decode_uleb128 (buf, &offset); + state->cfa_offset = offset; + break; + default: + abort (); + } + return buf; +} /* Decode one instruction's worth of DWARF 2 call frame information. Used by __frame_state_for. Takes pointers P to the instruction to decode, STATE to the current register unwind information, INFO to the @@ -567,6 +669,20 @@ execute_cfa_insn (void *p, struct frame_state_internal *state, p = decode_uleb128 (p, &offset); state->s.cfa_offset = offset; break; + case DW_CFA_def_cfa_expression: + { + void *end; + state->s.cfa_reg = 0; + state->s.cfa_offset = 0; + state->s.base_offset = 0; + state->s.indirect = 0; + + p = decode_uleb128 (p, &offset); + end = p + offset; + while (p < end) + p = decode_stack_op (p, &(state->s)); + break; + } case DW_CFA_remember_state: { |