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2004-04-02 Andrew Cagney <cagney@redhat.com>

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* frame.c (safe_frame_unwind_memory): New function.
	* frame.h (safe_frame_unwind_memory): Declare.  Update description
	of /safe_/ methods.
	* tramp-frame.c (tramp_frame_start): Re-order parmeters, add
	"next_frame".  Use safe_frame_unwind_memory.
	(tramp_frame_sniffer): Update call to tramp_frame_start.
This commit is contained in:
Andrew Cagney 2004-04-02 19:44:25 +00:00
parent c5edf76a75
commit 304396fba9
4 changed files with 30 additions and 6 deletions
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9
gdb/ChangeLog
View File

@ -1,3 +1,12 @@
2004-04-02 Andrew Cagney <cagney@redhat.com>
* frame.c (safe_frame_unwind_memory): New function.
* frame.h (safe_frame_unwind_memory): Declare. Update description
of /safe_/ methods.
* tramp-frame.c (tramp_frame_start): Re-order parmeters, add
"next_frame". Use safe_frame_unwind_memory.
(tramp_frame_sniffer): Update call to tramp_frame_start.
2004-04-01 Daniel Jacobowitz <drow@mvista.com>
* dwarf2read.c (dwarf2_objfile_data_key): New.

8
gdb/frame.c
View File

@ -2270,6 +2270,14 @@ get_frame_memory_unsigned (struct frame_info *this_frame, CORE_ADDR addr,
return read_memory_unsigned_integer (addr, len);
}
int
safe_frame_unwind_memory (struct frame_info *this_frame,
CORE_ADDR addr, void *buf, int len)
{
/* NOTE: read_memory_nobpt returns zero on success! */
return !read_memory_nobpt (addr, buf, len);
}
/* Architecture method. */
struct gdbarch *

9
gdb/frame.h
View File

@ -40,8 +40,8 @@
strongly hinting at its unsafeness)
safe_....(): Safer version of various functions, doesn't throw an
error (leave this for later?). Returns non-zero if the fetch
succeeds. Return a freshly allocated error message?
error (leave this for later?). Returns non-zero / non-NULL if the
request succeeds, zero / NULL otherwize.
Suffixes:
@ -461,6 +461,11 @@ extern LONGEST get_frame_memory_signed (struct frame_info *this_frame,
extern ULONGEST get_frame_memory_unsigned (struct frame_info *this_frame,
CORE_ADDR memaddr, int len);
/* Same as above, but return non-zero when the entire memory read
succeeds, zero otherwize. */
extern int safe_frame_unwind_memory (struct frame_info *this_frame,
CORE_ADDR addr, void *buf, int len);
/* Return this frame's architecture. */
extern struct gdbarch *get_frame_arch (struct frame_info *this_frame);

10
gdb/tramp-frame.c
View File

@ -85,7 +85,8 @@ tramp_frame_prev_register (struct frame_info *next_frame,
}
static CORE_ADDR
tramp_frame_start (CORE_ADDR pc, const struct tramp_frame *tramp)
tramp_frame_start (const struct tramp_frame *tramp,
struct frame_info *next_frame, CORE_ADDR pc)
{
int ti;
/* Search through the trampoline for one that matches the
@ -100,8 +101,9 @@ tramp_frame_start (CORE_ADDR pc, const struct tramp_frame *tramp)
ULONGEST insn;
if (tramp->insn[i] == TRAMP_SENTINEL_INSN)
return func;
if (target_read_memory (func + i * tramp->insn_size, buf,
tramp->insn_size) != 0)
if (!safe_frame_unwind_memory (next_frame,
func + i * tramp->insn_size,
buf, tramp->insn_size))
break;
insn = extract_unsigned_integer (buf, tramp->insn_size);
if (tramp->insn[i] != insn)
@ -133,7 +135,7 @@ tramp_frame_sniffer (const struct frame_unwind *self,
if (find_pc_section (pc) != NULL)
return 0;
/* Finally, check that the trampoline matches at PC. */
func = tramp_frame_start (pc, tramp);
func = tramp_frame_start (tramp, next_frame, pc);
if (func == 0)
return 0;
tramp_cache = FRAME_OBSTACK_ZALLOC (struct tramp_frame_cache);