364 lines
9.9 KiB
C
364 lines
9.9 KiB
C
/*
|
|
* Debugger stack handling
|
|
*
|
|
* Copyright 1995 Alexandre Julliard
|
|
* Copyright 1996 Eric Youngdale
|
|
* Copyright 1999 Ove Kåven
|
|
*/
|
|
|
|
#include "config.h"
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include "debugger.h"
|
|
#include "stackframe.h"
|
|
|
|
|
|
/*
|
|
* We keep this info for each frame, so that we can
|
|
* find local variable information correctly.
|
|
*/
|
|
struct bt_info
|
|
{
|
|
unsigned int cs;
|
|
unsigned int eip;
|
|
unsigned int ss;
|
|
unsigned int ebp;
|
|
struct symbol_info frame;
|
|
};
|
|
|
|
static int nframe;
|
|
static struct bt_info * frames = NULL;
|
|
int curr_frame;
|
|
|
|
typedef struct
|
|
{
|
|
WORD bp;
|
|
WORD ip;
|
|
WORD cs;
|
|
} FRAME16;
|
|
|
|
typedef struct
|
|
{
|
|
DWORD bp;
|
|
DWORD ip;
|
|
WORD cs;
|
|
} FRAME32;
|
|
|
|
|
|
|
|
/***********************************************************************
|
|
* DEBUG_InfoStack
|
|
*
|
|
* Dump the top of the stack
|
|
*/
|
|
void DEBUG_InfoStack(void)
|
|
{
|
|
DBG_ADDR addr;
|
|
|
|
addr.type = NULL;
|
|
addr.seg = SS_reg(&DEBUG_context);
|
|
addr.off = ESP_reg(&DEBUG_context);
|
|
|
|
fprintf(stderr,"Stack dump:\n");
|
|
if (IS_SELECTOR_32BIT(addr.seg))
|
|
{ /* 32-bit mode */
|
|
DEBUG_ExamineMemory( &addr, 24, 'x' );
|
|
}
|
|
else /* 16-bit mode */
|
|
{
|
|
addr.off &= 0xffff;
|
|
DEBUG_ExamineMemory( &addr, 24, 'w' );
|
|
}
|
|
fprintf(stderr,"\n");
|
|
}
|
|
|
|
|
|
static void DEBUG_ForceFrame(DBG_ADDR *stack, DBG_ADDR *code, int frameno, int bits, int noisy)
|
|
{
|
|
int theframe = nframe++;
|
|
frames = (struct bt_info *)DBG_realloc(frames,
|
|
nframe*sizeof(struct bt_info));
|
|
if (noisy)
|
|
fprintf(stderr,"%s%d ", (theframe == curr_frame ? "=>" : " "),
|
|
frameno);
|
|
frames[theframe].cs = code->seg;
|
|
frames[theframe].eip = code->off;
|
|
if (noisy)
|
|
frames[theframe].frame = DEBUG_PrintAddressAndArgs( code, bits,
|
|
stack->off, TRUE );
|
|
else
|
|
DEBUG_FindNearestSymbol( code, TRUE,
|
|
&frames[theframe].frame.sym, stack->off,
|
|
&frames[theframe].frame.list);
|
|
frames[theframe].ss = stack->seg;
|
|
frames[theframe].ebp = stack->off;
|
|
if (noisy) {
|
|
fprintf( stderr, (bits == 16) ? " (bp=%04lx)\n" : " (ebp=%08lx)\n", stack->off );
|
|
}
|
|
}
|
|
|
|
static BOOL DEBUG_Frame16(DBG_ADDR *addr, unsigned int *cs, int frameno, int noisy)
|
|
{
|
|
unsigned int ss = addr->seg, possible_cs = 0;
|
|
FRAME16 *frame = (FRAME16 *)DBG_ADDR_TO_LIN(addr);
|
|
int theframe = nframe;
|
|
|
|
if (!DBG_CHECK_READ_PTR( addr, sizeof(FRAME16) )) return FALSE;
|
|
if (!frame->bp) return FALSE;
|
|
nframe++;
|
|
frames = (struct bt_info *)DBG_realloc(frames,
|
|
nframe*sizeof(struct bt_info));
|
|
if (noisy)
|
|
fprintf(stderr,"%s%d ", (theframe == curr_frame ? "=>" : " "),
|
|
frameno);
|
|
if (frame->bp & 1) *cs = frame->cs;
|
|
else {
|
|
/* not explicitly marked as far call,
|
|
* but check whether it could be anyway */
|
|
if (((frame->cs&7)==7) && (frame->cs != *cs) && !IS_SELECTOR_FREE(frame->cs)) {
|
|
ldt_entry tcs;
|
|
LDT_GetEntry( SELECTOR_TO_ENTRY(frame->cs), &tcs );
|
|
if ( tcs.type == SEGMENT_CODE ) {
|
|
/* it is very uncommon to push a code segment cs as
|
|
* a parameter, so this should work in most cases */
|
|
*cs = possible_cs = frame->cs;
|
|
}
|
|
}
|
|
}
|
|
frames[theframe].cs = addr->seg = *cs;
|
|
frames[theframe].eip = addr->off = frame->ip;
|
|
if (noisy)
|
|
frames[theframe].frame = DEBUG_PrintAddressAndArgs( addr, 16,
|
|
frame->bp, TRUE );
|
|
else
|
|
DEBUG_FindNearestSymbol( addr, TRUE,
|
|
&frames[theframe].frame.sym, frame->bp,
|
|
&frames[theframe].frame.list);
|
|
frames[theframe].ss = addr->seg = ss;
|
|
frames[theframe].ebp = addr->off = frame->bp & ~1;
|
|
if (noisy) {
|
|
fprintf( stderr, " (bp=%04lx", addr->off );
|
|
if (possible_cs) {
|
|
fprintf( stderr, ", far call assumed" );
|
|
}
|
|
fprintf( stderr, ")\n" );
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
static BOOL DEBUG_Frame32(DBG_ADDR *addr, unsigned int *cs, int frameno, int noisy)
|
|
{
|
|
unsigned int ss = addr->seg;
|
|
FRAME32 *frame = (FRAME32 *)DBG_ADDR_TO_LIN(addr);
|
|
int theframe = nframe;
|
|
|
|
if (!DBG_CHECK_READ_PTR( addr, sizeof(FRAME32) )) return FALSE;
|
|
if (!frame->ip) return FALSE;
|
|
nframe++;
|
|
frames = (struct bt_info *)DBG_realloc(frames,
|
|
nframe*sizeof(struct bt_info));
|
|
if (noisy)
|
|
fprintf(stderr,"%s%d ", (theframe == curr_frame ? "=>" : " "),
|
|
frameno);
|
|
frames[theframe].cs = addr->seg = *cs;
|
|
frames[theframe].eip = addr->off = frame->ip;
|
|
if (noisy)
|
|
frames[theframe].frame = DEBUG_PrintAddressAndArgs( addr, 32,
|
|
frame->bp, TRUE );
|
|
else
|
|
DEBUG_FindNearestSymbol( addr, TRUE,
|
|
&frames[theframe].frame.sym, frame->bp,
|
|
&frames[theframe].frame.list);
|
|
if (noisy) fprintf( stderr, " (ebp=%08lx)\n", frame->bp );
|
|
frames[theframe].ss = addr->seg = ss;
|
|
frames[theframe].ebp = frame->bp;
|
|
if (addr->off == frame->bp) return FALSE;
|
|
addr->off = frame->bp;
|
|
return TRUE;
|
|
}
|
|
|
|
static void DEBUG_DoBackTrace(int noisy)
|
|
{
|
|
DBG_ADDR addr, sw_addr;
|
|
unsigned int ss = SS_reg(&DEBUG_context), cs = CS_reg(&DEBUG_context);
|
|
int frameno = 0, is16, ok;
|
|
DWORD next_switch, cur_switch;
|
|
|
|
if (noisy) fprintf( stderr, "Backtrace:\n" );
|
|
|
|
nframe = 1;
|
|
if (frames) DBG_free( frames );
|
|
frames = (struct bt_info *) DBG_alloc( sizeof(struct bt_info) );
|
|
if (noisy)
|
|
fprintf(stderr,"%s%d ",(curr_frame == 0 ? "=>" : " "), frameno);
|
|
|
|
if (IS_SELECTOR_SYSTEM(ss)) ss = 0;
|
|
if (IS_SELECTOR_SYSTEM(cs)) cs = 0;
|
|
|
|
/* first stack frame from registers */
|
|
if (IS_SELECTOR_32BIT(ss))
|
|
{
|
|
frames[0].cs = addr.seg = cs;
|
|
frames[0].eip = addr.off = EIP_reg(&DEBUG_context);
|
|
if (noisy)
|
|
frames[0].frame = DEBUG_PrintAddress( &addr, 32, TRUE );
|
|
else
|
|
DEBUG_FindNearestSymbol( &addr, TRUE, &frames[0].frame.sym, 0,
|
|
&frames[0].frame.list);
|
|
frames[0].ss = addr.seg = ss;
|
|
frames[0].ebp = addr.off = EBP_reg(&DEBUG_context);
|
|
if (noisy) fprintf( stderr, " (ebp=%08x)\n", frames[0].ebp );
|
|
is16 = FALSE;
|
|
} else {
|
|
frames[0].cs = addr.seg = cs;
|
|
frames[0].eip = addr.off = IP_reg(&DEBUG_context);
|
|
if (noisy)
|
|
frames[0].frame = DEBUG_PrintAddress( &addr, 16, TRUE );
|
|
else
|
|
DEBUG_FindNearestSymbol( &addr, TRUE, &frames[0].frame.sym, 0,
|
|
&frames[0].frame.list);
|
|
frames[0].ss = addr.seg = ss;
|
|
frames[0].ebp = addr.off = BP_reg(&DEBUG_context);
|
|
if (noisy) fprintf( stderr, " (bp=%04x)\n", frames[0].ebp );
|
|
is16 = TRUE;
|
|
}
|
|
|
|
next_switch = THREAD_Current()->cur_stack;
|
|
if (is16) {
|
|
cur_switch = (DWORD)((STACK32FRAME*)next_switch)->frame16;
|
|
sw_addr.seg = SELECTOROF(cur_switch);
|
|
sw_addr.off = OFFSETOF(cur_switch);
|
|
} else {
|
|
cur_switch = (DWORD)((STACK16FRAME*)PTR_SEG_TO_LIN(next_switch))->frame32;
|
|
sw_addr.seg = ss;
|
|
sw_addr.off = cur_switch;
|
|
}
|
|
if (DEBUG_IsBadReadPtr(&sw_addr,1)) {
|
|
sw_addr.seg = (DWORD)-1;
|
|
sw_addr.off = (DWORD)-1;
|
|
}
|
|
|
|
for (ok = TRUE; ok;) {
|
|
if ((frames[frameno].ss == sw_addr.seg) &&
|
|
(frames[frameno].ebp >= sw_addr.off)) {
|
|
/* 16<->32 switch...
|
|
* yes, I know this is confusing, it gave me a headache too */
|
|
if (is16) {
|
|
STACK32FRAME *frame = (STACK32FRAME*)next_switch;
|
|
DBG_ADDR code = { NULL, 0, frame->retaddr };
|
|
|
|
cs = 0;
|
|
addr.seg = 0;
|
|
addr.off = frame->ebp;
|
|
DEBUG_ForceFrame( &addr, &code, ++frameno, 32, noisy );
|
|
|
|
next_switch = cur_switch;
|
|
cur_switch = (DWORD)((STACK16FRAME*)PTR_SEG_TO_LIN(next_switch))->frame32;
|
|
sw_addr.seg = 0;
|
|
sw_addr.off = cur_switch;
|
|
|
|
is16 = FALSE;
|
|
} else {
|
|
STACK16FRAME *frame = (STACK16FRAME*)PTR_SEG_TO_LIN(next_switch);
|
|
DBG_ADDR code = { NULL, frame->cs, frame->ip };
|
|
|
|
cs = frame->cs;
|
|
addr.seg = SELECTOROF(next_switch);
|
|
addr.off = frame->bp;
|
|
DEBUG_ForceFrame( &addr, &code, ++frameno, 16, noisy );
|
|
|
|
next_switch = cur_switch;
|
|
cur_switch = (DWORD)((STACK32FRAME*)next_switch)->frame16;
|
|
sw_addr.seg = SELECTOROF(cur_switch);
|
|
sw_addr.off = OFFSETOF(cur_switch);
|
|
|
|
is16 = TRUE;
|
|
}
|
|
if (DEBUG_IsBadReadPtr(&sw_addr,1)) {
|
|
sw_addr.seg = (DWORD)-1;
|
|
sw_addr.off = (DWORD)-1;
|
|
}
|
|
} else {
|
|
/* ordinary stack frame */
|
|
ok = is16 ? DEBUG_Frame16( &addr, &cs, ++frameno, noisy)
|
|
: DEBUG_Frame32( &addr, &cs, ++frameno, noisy);
|
|
}
|
|
}
|
|
if (noisy) fprintf( stderr, "\n" );
|
|
}
|
|
|
|
/***********************************************************************
|
|
* DEBUG_BackTrace
|
|
*
|
|
* Display a stack back-trace.
|
|
*/
|
|
void DEBUG_BackTrace(void)
|
|
{
|
|
DEBUG_DoBackTrace( TRUE );
|
|
}
|
|
|
|
/***********************************************************************
|
|
* DEBUG_SilentBackTrace
|
|
*
|
|
* Display a stack back-trace.
|
|
*/
|
|
void DEBUG_SilentBackTrace(void)
|
|
{
|
|
DEBUG_DoBackTrace( FALSE );
|
|
}
|
|
|
|
int
|
|
DEBUG_SetFrame(int newframe)
|
|
{
|
|
int rtn = FALSE;
|
|
|
|
curr_frame = newframe;
|
|
|
|
if( curr_frame >= nframe )
|
|
{
|
|
curr_frame = nframe - 1;
|
|
}
|
|
|
|
if( curr_frame < 0 )
|
|
{
|
|
curr_frame = 0;
|
|
}
|
|
|
|
if( frames && frames[curr_frame].frame.list.sourcefile != NULL )
|
|
{
|
|
DEBUG_List(&frames[curr_frame].frame.list, NULL, 0);
|
|
}
|
|
|
|
rtn = TRUE;
|
|
return (rtn);
|
|
}
|
|
|
|
int
|
|
DEBUG_GetCurrentFrame(struct name_hash ** name, unsigned int * eip,
|
|
unsigned int * ebp)
|
|
{
|
|
/*
|
|
* If we don't have a valid backtrace, then just return.
|
|
*/
|
|
if( frames == NULL )
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
/*
|
|
* If we don't know what the current function is, then we also have
|
|
* nothing to report here.
|
|
*/
|
|
if( frames[curr_frame].frame.sym == NULL )
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
*name = frames[curr_frame].frame.sym;
|
|
*eip = frames[curr_frame].eip;
|
|
*ebp = frames[curr_frame].ebp;
|
|
|
|
return TRUE;
|
|
}
|
|
|