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* dwarf2-frame.c (execute_cfa_program): Call dwarf2_restore_rule

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function to handle required actions for the DW_CFA_restore and
	DW_CFA_restore_extended instructions.
	(dwarf2_restore_rule): New function.
This commit is contained in:
Luis Machado
2007-12-26 10:57:50 +00:00
parent 5588bc95a7
commit a6a5a94583
2 changed files with 39 additions and 20 deletions
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52
gdb/dwarf2-frame.c
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@@ -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);
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: