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Remove special handling for PC == 0. With this, kgdb can now properly

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unwind across a page fault due to a null function pointer.  It does a
better job than ddb now in fact.

Reviewed by:	marcel
MFC after:	3 days
This commit is contained in:
John Baldwin 2006-08-23 19:16:17 +00:00
parent 35a64c9f6f
commit c198287ff3
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=161555
1 changed files with 1 additions and 6 deletions
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7
gnu/usr.bin/gdb/kgdb/trgt_amd64.c
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@ -149,15 +149,12 @@ kgdb_trgt_trapframe_prev_register(struct frame_info *next_frame,
*lvalp = not_lval;
*realnump = -1;
cache = kgdb_trgt_frame_cache(next_frame, this_cache);
if (cache->pc == 0)
return;
ofs = (regnum >= AMD64_RAX_REGNUM && regnum <= AMD64_EFLAGS_REGNUM + 2)
? kgdb_trgt_frame_offset[regnum] : -1;
if (ofs == -1)
return;
cache = kgdb_trgt_frame_cache(next_frame, this_cache);
*addrp = cache->sp + ofs;
*lvalp = lval_memory;
target_read_memory(*addrp, valuep, regsz);
@ -176,8 +173,6 @@ kgdb_trgt_trapframe_sniffer(struct frame_info *next_frame)
CORE_ADDR pc;
pc = frame_pc_unwind(next_frame);
if (pc == 0)
return (&kgdb_trgt_trapframe_unwind);
pname = NULL;
find_pc_partial_function(pc, &pname, NULL, NULL);
if (pname == NULL)