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Differentiate between interrupt frames, trap interrupt frames and timer

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frame in the kgdb, to allow it to properly backtrace over the interrupt
stacks.

Noted and reviewed by:	tegge
Tested by:	pho
MFC after:	1 week
This commit is contained in:
Konstantin Belousov 2008-09-27 15:58:37 +00:00
parent d558cef9e6
commit 42003afced
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=183414
1 changed files with 33 additions and 3 deletions
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36
gnu/usr.bin/gdb/kgdb/trgt_i386.c
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@ -242,10 +242,14 @@ static const struct frame_unwind kgdb_trgt_dblfault_unwind = {
};
struct kgdb_frame_cache {
int intrframe;
int frame_type;
CORE_ADDR pc;
CORE_ADDR sp;
};
#define FT_NORMAL 1
#define FT_INTRFRAME 2
#define FT_INTRTRAPFRAME 3
#define FT_TIMERFRAME 4
static int kgdb_trgt_frame_offset[15] = {
offsetof(struct trapframe, tf_eax),
@ -278,7 +282,17 @@ kgdb_trgt_frame_cache(struct frame_info *next_frame, void **this_cache)
*this_cache = cache;
cache->pc = frame_func_unwind(next_frame);
find_pc_partial_function(cache->pc, &pname, NULL, NULL);
cache->intrframe = (pname[0] == 'X') ? 1 : 0;
if (pname[0] != 'X')
cache->frame_type = FT_NORMAL;
else if (strcmp(pname, "Xtimerint") == 0)
cache->frame_type = FT_TIMERFRAME;
else if (strcmp(pname, "Xcpustop") == 0 ||
strcmp(pname, "Xrendezvous") == 0 ||
strcmp(pname, "Xipi_intr_bitmap_handler") == 0 ||
strcmp(pname, "Xlazypmap") == 0)
cache->frame_type = FT_INTRTRAPFRAME;
else
cache->frame_type = FT_INTRFRAME;
frame_unwind_register(next_frame, SP_REGNUM, buf);
cache->sp = extract_unsigned_integer(buf,
register_size(current_gdbarch, SP_REGNUM));
@ -321,7 +335,23 @@ kgdb_trgt_trapframe_prev_register(struct frame_info *next_frame,
return;
cache = kgdb_trgt_frame_cache(next_frame, this_cache);
*addrp = cache->sp + ofs + (cache->intrframe ? 4 : 0);
switch (cache->frame_type) {
case FT_NORMAL:
break;
case FT_INTRFRAME:
ofs += 4;
break;
case FT_TIMERFRAME:
break;
case FT_INTRTRAPFRAME:
ofs -= ofs_fix;
break;
default:
fprintf_unfiltered(gdb_stderr, "Correct FT_XXX frame offsets "
"for %d\n", cache->frame_type);
break;
}
*addrp = cache->sp + ofs;
*lvalp = lval_memory;
target_read_memory(*addrp, valuep, regsz);
}