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* dwarf2expr.h (dwarf_value_location): Add more comments describing

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enum values.
	(struct dwarf_stack_value): New struct.
	(struct dwarf_expr_context): Change type of `stack' from CORE_ADDR*
	to struct dwarf_stack_value*.
	(struct dwarf_expr_piece): Move `v.value' into its own struct, v.expr,
	all uses updated.  Add v.expr.in_stack_memory.
	(dwarf_expr_push): Update declaration.
	(dwarf_expr_fetch_in_stack_memory): Declare.
	* dwarf2expr.c (dwarf_expr_grow_stack): Update calculation of
	size of stack value.
	(dwarf_expr_push): New arg in_stack_memory, all callers updated.
	(dwarf_expr_fetch_in_stack_memory): New function.
	(add_piece): Set in_stack_memory for non-literal values.
	(execute_stack_op): Allow ops to specify whether the value is on the
	program's stack.
	(execute_stack_op, case DW_OP_fbreg): Mark value as in stack memory.
	(execute_stack_op, case DW_OP_call_frame_cfa): Ditto.
	(execute_stack_op, case DW_OP_dup): Copy in_stack_memory flag.
	(execute_stack_op, cases DW_OP_pick, DW_OP_over): Ditto.
	(execute_stack_op, cases DW_OP_swap, DW_OP_rot): Update type of
	dwarf stack value.
	* dwarf2loc.c (read_pieced_value): Call read_stack for values known
	to be on the program's stack.
	(dwarf2_evaluate_loc_desc, case DWARF_VALUE_MEMORY): Call
	set_value_stack only for objects known to be in stack memory.
	* dwarf2-frame.c (execute_stack_op): New arg initial_in_stack_memory,
	all callers updated.
This commit is contained in:
Doug Evans
2009-09-15 16:20:53 +00:00
parent 7d4f32d36a
commit 44353522ec
5 changed files with 122 additions and 31 deletions
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11
gdb/dwarf2-frame.c
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@@ -357,7 +357,8 @@ register %s (#%d) at %s"),
static CORE_ADDR
execute_stack_op (gdb_byte *exp, ULONGEST len, int addr_size,
struct frame_info *this_frame, CORE_ADDR initial)
struct frame_info *this_frame, CORE_ADDR initial,
int initial_in_stack_memory)
{
struct dwarf_expr_context *ctx;
CORE_ADDR result;
@@ -375,7 +376,7 @@ execute_stack_op (gdb_byte *exp, ULONGEST len, int addr_size,
ctx->get_frame_cfa = no_get_frame_cfa;
ctx->get_tls_address = no_get_tls_address;
dwarf_expr_push (ctx, initial);
dwarf_expr_push (ctx, initial, initial_in_stack_memory);
dwarf_expr_eval (ctx, exp, len);
result = dwarf_expr_fetch (ctx, 0);
@@ -975,7 +976,7 @@ dwarf2_frame_cache (struct frame_info *this_frame, void **this_cache)
case CFA_EXP:
cache->cfa =
execute_stack_op (fs->regs.cfa_exp, fs->regs.cfa_exp_len,
cache->addr_size, this_frame, 0);
cache->addr_size, this_frame, 0, 0);
break;
default:
@@ -1131,7 +1132,7 @@ dwarf2_frame_prev_register (struct frame_info *this_frame, void **this_cache,
case DWARF2_FRAME_REG_SAVED_EXP:
addr = execute_stack_op (cache->reg[regnum].loc.exp,
cache->reg[regnum].exp_len,
cache->addr_size, this_frame, cache->cfa);
cache->addr_size, this_frame, cache->cfa, 1);
return frame_unwind_got_memory (this_frame, regnum, addr);
case DWARF2_FRAME_REG_SAVED_VAL_OFFSET:
@@ -1141,7 +1142,7 @@ dwarf2_frame_prev_register (struct frame_info *this_frame, void **this_cache,
case DWARF2_FRAME_REG_SAVED_VAL_EXP:
addr = execute_stack_op (cache->reg[regnum].loc.exp,
cache->reg[regnum].exp_len,
cache->addr_size, this_frame, cache->cfa);
cache->addr_size, this_frame, cache->cfa, 1);
return frame_unwind_got_constant (this_frame, regnum, addr);
case DWARF2_FRAME_REG_UNSPECIFIED: