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| author | Luis Machado <luisgpm@br.ibm.com> | 2007-12-26 10:57:50 +0000 |
|---|---|---|
| committer | Luis Machado <luisgpm@br.ibm.com> | 2007-12-26 10:57:50 +0000 |
| commit | 2090e8592153476f0ed6e40e3612037b817d3c6e (patch) | |
| tree | 78798757c77a6d0bdf8c3b59a0a85ad52b504616 /gdb/dwarf2-frame.c | |
| parent | d57eb782f8623db296acdc22089a7b1dafe0d178 (diff) | |
| download | gdb-2090e8592153476f0ed6e40e3612037b817d3c6e.tar.gz | |
* dwarf2-frame.c (execute_cfa_program): Call dwarf2_restore_rule
function to handle required actions for the DW_CFA_restore and
DW_CFA_restore_extended instructions.
(dwarf2_restore_rule): New function.
Diffstat (limited to 'gdb/dwarf2-frame.c')
| -rw-r--r-- | gdb/dwarf2-frame.c | 52 |
1 files changed, 32 insertions, 20 deletions
diff --git a/gdb/dwarf2-frame.c b/gdb/dwarf2-frame.c index c84fe492a7d..2617213e318 100644 --- a/gdb/dwarf2-frame.c +++ b/gdb/dwarf2-frame.c @@ -268,6 +268,36 @@ no_get_tls_address (void *baton, CORE_ADDR offset) _("Support for DW_OP_GNU_push_tls_address is unimplemented")); } +/* Execute the required actions for both the DW_CFA_restore and +DW_CFA_restore_extended instructions. */ +static void +dwarf2_restore_rule (struct gdbarch *gdbarch, ULONGEST reg_num, + struct dwarf2_frame_state *fs, int eh_frame_p) +{ + ULONGEST reg; + + gdb_assert (fs->initial.reg); + reg = dwarf2_frame_adjust_regnum (gdbarch, reg_num, eh_frame_p); + dwarf2_frame_state_alloc_regs (&fs->regs, reg + 1); + + /* Check if this register was explicitly initialized in the + CIE initial instructions. If not, default the rule to + UNSPECIFIED. */ + if (reg < fs->initial.num_regs) + fs->regs.reg[reg] = fs->initial.reg[reg]; + else + fs->regs.reg[reg].how = DWARF2_FRAME_REG_UNSPECIFIED; + + if (fs->regs.reg[reg].how == DWARF2_FRAME_REG_UNSPECIFIED) + complaint (&symfile_complaints, _("\ +incomplete CFI data; DW_CFA_restore unspecified\n\ +register %s (#%d) at 0x%s"), + gdbarch_register_name + (gdbarch, gdbarch_dwarf2_reg_to_regnum (gdbarch, reg)), + gdbarch_dwarf2_reg_to_regnum (gdbarch, reg), + paddr (fs->pc)); +} + static CORE_ADDR execute_stack_op (gdb_byte *exp, ULONGEST len, struct frame_info *next_frame, CORE_ADDR initial) @@ -324,23 +354,8 @@ execute_cfa_program (gdb_byte *insn_ptr, gdb_byte *insn_end, } else if ((insn & 0xc0) == DW_CFA_restore) { - gdb_assert (fs->initial.reg); reg = insn & 0x3f; - reg = dwarf2_frame_adjust_regnum (gdbarch, reg, eh_frame_p); - dwarf2_frame_state_alloc_regs (&fs->regs, reg + 1); - if (reg < fs->initial.num_regs) - fs->regs.reg[reg] = fs->initial.reg[reg]; - else - fs->regs.reg[reg].how = DWARF2_FRAME_REG_UNSPECIFIED; - - if (fs->regs.reg[reg].how == DWARF2_FRAME_REG_UNSPECIFIED) - complaint (&symfile_complaints, _("\ -incomplete CFI data; DW_CFA_restore unspecified\n\ -register %s (#%d) at 0x%s"), - gdbarch_register_name - (gdbarch, gdbarch_dwarf2_reg_to_regnum (gdbarch, reg)), - gdbarch_dwarf2_reg_to_regnum (gdbarch, reg), - paddr (fs->pc)); + dwarf2_restore_rule (gdbarch, reg, fs, eh_frame_p); } else { @@ -378,11 +393,8 @@ register %s (#%d) at 0x%s"), break; case DW_CFA_restore_extended: - gdb_assert (fs->initial.reg); insn_ptr = read_uleb128 (insn_ptr, insn_end, ®); - reg = dwarf2_frame_adjust_regnum (gdbarch, reg, eh_frame_p); - dwarf2_frame_state_alloc_regs (&fs->regs, reg + 1); - fs->regs.reg[reg] = fs->initial.reg[reg]; + dwarf2_restore_rule (gdbarch, reg, fs, eh_frame_p); break; case DW_CFA_undefined: |