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2000-07-29  Greg McGary  <greg@mcgary.org>

	* Rules (test-bp-inputs, make-test-out): New variables.
	($(objpfx)%-bp.out): New rule.
	($(objpfx)%.out): Rewrite in terms of new variables.

	* libio/iovswscanf.c (vswscanf): Pass _IO_FILE_plus pointer to
	internal function that uses vtable.
	* libio/vsnprintf.c (_IO_vsnprintf): Likewise.
	* libio/vswprintf.c (_IO_vswprintf): Likewise.

	* malloc/malloc.c (mem2chunk): Define in terms of chunk_at_offset.
	(malloc_extend_top): Convert brk to chunk using chunk_at_offset.
	(chunk_align): Likewise.

	* time/asctime.c (ab_day_name, ab_month_name): Rewrite expression
	in a way that conforms to decl, and avoids spurious bounds violation.

	* sysdeps/arm/frame.h (struct layout): Make pointers __unbounded.
	* sysdeps/generic/frame.h: Likewise.
	* sysdeps/generic/backtrace.c (ADVANCE_STACK_FRAME): Wrap bounds
	around return value.
	(__backtrace): Qualify frame-pointer chain and return address
	pointers as __unbounded.  Wrap bounds around variable `current'.
	* sysdeps/generic/segfault.c (ADVANCE_STACK_FRAME): Wrap bounds
	around return value.
	(catch_segfault): Qualify frame-pointer chain and return address
	pointers as __unbounded.  Wrap bounds around variable `current'.
	* sysdeps/i386/backtrace.c (struct layout): Make pointers __unbounded.
	(ADVANCE_STACK_FRAME): Wrap bounds around return value.
	* sysdeps/powerpc/backtrace.c (struct layout): Make pointers __unbounded.
	(__backtrace): Qualify frame-pointer chain and return address
	pointers as __unbounded.  Wrap bounds around variable `current'.

	* sysdeps/i386/addmul_1.S: s2_limb is scalar so remove bounds check.
	* sysdeps/i386/mul_1.S: Likewise.
	* sysdeps/i386/submul_1.S: Likewise.
	* sysdeps/i386/i586/addmul_1.S: Likewise.
	* sysdeps/i386/i586/mul_1.S: Add bounds checks.
	* sysdeps/i386/i586/submul_1.S: Likewise.
This commit is contained in:
Greg McGary 2000-07-29 08:11:47 +00:00
parent f2897624e2
commit 41d998a683
13 changed files with 92 additions and 41 deletions
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41
ChangeLog
View File

@ -1,3 +1,44 @@
2000-07-29 Greg McGary <greg@mcgary.org>
* Rules (test-bp-inputs, make-test-out): New variables.
($(objpfx)%-bp.out): New rule.
($(objpfx)%.out): Rewrite in terms of new variables.
* libio/iovswscanf.c (vswscanf): Pass _IO_FILE_plus pointer to
internal function that uses vtable.
* libio/vsnprintf.c (_IO_vsnprintf): Likewise.
* libio/vswprintf.c (_IO_vswprintf): Likewise.
* malloc/malloc.c (mem2chunk): Define in terms of chunk_at_offset.
(malloc_extend_top): Convert brk to chunk using chunk_at_offset.
(chunk_align): Likewise.
* time/asctime.c (ab_day_name, ab_month_name): Rewrite expression
in a way that conforms to decl, and avoids spurious bounds violation.
* sysdeps/arm/frame.h (struct layout): Make pointers __unbounded.
* sysdeps/generic/frame.h: Likewise.
* sysdeps/generic/backtrace.c (ADVANCE_STACK_FRAME): Wrap bounds
around return value.
(__backtrace): Qualify frame-pointer chain and return address
pointers as __unbounded. Wrap bounds around variable `current'.
* sysdeps/generic/segfault.c (ADVANCE_STACK_FRAME): Wrap bounds
around return value.
(catch_segfault): Qualify frame-pointer chain and return address
pointers as __unbounded. Wrap bounds around variable `current'.
* sysdeps/i386/backtrace.c (struct layout): Make pointers __unbounded.
(ADVANCE_STACK_FRAME): Wrap bounds around return value.
* sysdeps/powerpc/backtrace.c (struct layout): Make pointers __unbounded.
(__backtrace): Qualify frame-pointer chain and return address
pointers as __unbounded. Wrap bounds around variable `current'.
* sysdeps/i386/addmul_1.S: s2_limb is scalar so remove bounds check.
* sysdeps/i386/mul_1.S: Likewise.
* sysdeps/i386/submul_1.S: Likewise.
* sysdeps/i386/i586/addmul_1.S: Likewise.
* sysdeps/i386/i586/mul_1.S: Add bounds checks.
* sysdeps/i386/i586/submul_1.S: Likewise.
2000-07-27 Andreas Jaeger <aj@suse.de>
* libio/Depend: New file, libio needs localedata for tests.

12
Rules
View File

@ -129,12 +129,16 @@ endif
ifneq "$(strip $(tests) $(test-srcs))" ""
# These are the implicit rules for making test outputs
# from the test programs and whatever input files are present.
make-test-out = GCONV_PATH=$(common-objpfx)iconvdata LC_ALL=C \
$($*-ENV) $(built-program-cmd) $($*-ARGS)
$(objpfx)%-bp.out: %.input $(objpfx)%-bp
$(make-test-out) > $@ < $(word 1,$^)
$(objpfx)%.out: %.input $(objpfx)%
GCONV_PATH=$(common-objpfx)iconvdata LC_ALL=C \
$($*-ENV) $(built-program-cmd) $($*-ARGS) < $(word 1,$^) > $@
$(make-test-out) > $@ < $(word 1,$^)
$(objpfx)%.out: /dev/null $(objpfx)% # Make it 2nd arg for canned sequence.
GCONV_PATH=$(common-objpfx)iconvdata LC_ALL=C \
$($*-ENV) $(built-program-cmd) $($*-ARGS) > $@
$(make-test-out) > $@
endif # tests
.PHONY: distclean realclean subdir_distclean subdir_realclean \

4
libio/iovswscanf.c
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@ -1,4 +1,4 @@
/* Copyright (C) 1993, 1997, 1998, 1999 Free Software Foundation, Inc.
/* Copyright (C) 1993, 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
This file is part of the GNU IO Library.
This library is free software; you can redistribute it and/or
@ -43,6 +43,6 @@ vswscanf (string, format, args)
_IO_no_init (&sf._sbf._f, 0, 0, &wd, &_IO_wstr_jumps);
_IO_fwide (&sf._sbf._f, 1);
_IO_wstr_init_static (&sf._sbf._f, (wchar_t *)string, 0, NULL);
ret = _IO_vfwscanf (&sf._sbf._f, format, args, NULL);
ret = _IO_vfwscanf ((_IO_FILE *) &sf._sbf, format, args, NULL);
return ret;
}

2
libio/vsnprintf.c
View File

@ -126,7 +126,7 @@ _IO_vsnprintf (string, maxlen, format, args)
_IO_JUMPS ((struct _IO_FILE_plus *) &sf.f._sbf) = &_IO_strn_jumps;
string[0] = '\0';
_IO_str_init_static (&sf.f, string, maxlen - 1, string);
ret = _IO_vfprintf (&sf.f._sbf._f, format, args);
ret = _IO_vfprintf ((_IO_FILE *) &sf.f._sbf, format, args);
if (sf.f._sbf._f._IO_buf_base != sf.overflow_buf)
*sf.f._sbf._f._IO_write_ptr = '\0';

4
libio/vswprintf.c
View File

@ -1,4 +1,4 @@
/* Copyright (C) 1994, 1997, 1999 Free Software Foundation, Inc.
/* Copyright (C) 1994, 1997, 1999, 2000 Free Software Foundation, Inc.
This file is part of the GNU IO Library.
This library is free software; you can redistribute it and/or
@ -130,7 +130,7 @@ _IO_vswprintf (string, maxlen, format, args)
_IO_fwide (&sf.f._sbf._f, 1);
string[0] = L'\0';
_IO_wstr_init_static (&sf.f._sbf._f, string, maxlen - 1, string);
ret = _IO_vfwprintf (&sf.f._sbf._f, format, args);
ret = _IO_vfwprintf ((_IO_FILE *) &sf.f._sbf, format, args);
if (sf.f._sbf._f._wide_data->_IO_buf_base != sf.overflow_buf)
*sf.f._sbf._f._wide_data->_IO_write_ptr = '\0';

6
malloc/malloc.c
View File

@ -1292,7 +1292,7 @@ static void free_atfork();
/* conversion from malloc headers to user pointers, and back */
#define chunk2mem(p) ((Void_t*)((char*)(p) + 2*SIZE_SZ))
#define mem2chunk(mem) BOUNDED_1((mchunkptr)((char*)(mem) - 2*SIZE_SZ))
#define mem2chunk(mem) chunk_at_offset((mem), -2*SIZE_SZ)
/* pad request bytes into a usable size, return non-zero on overflow */
@ -2513,7 +2513,7 @@ malloc_extend_top(ar_ptr, nb) arena *ar_ptr; INTERNAL_SIZE_T nb;
sbrked_mem += correction;
top(&main_arena) = (mchunkptr)brk;
top(&main_arena) = chunk_at_offset(brk, 0);
top_size = new_brk - brk + correction;
set_head(top(&main_arena), top_size | PREV_INUSE);
@ -3574,7 +3574,7 @@ arena* ar_ptr; INTERNAL_SIZE_T nb; size_t alignment;
brk = (char*)mem2chunk(((m + alignment - 1)) & -(long)alignment);
if ((long)(brk - (char*)(p)) < (long)MINSIZE) brk += alignment;
newp = (mchunkptr)brk;
newp = chunk_at_offset(brk, 0);
leadsize = brk - (char*)(p);
newsize = chunksize(p) - leadsize;

6
sysdeps/arm/frame.h
View File

@ -20,7 +20,7 @@
/* This is the APCS stack backtrace structure. */
struct layout
{
struct layout *next;
void *sp;
void *return_address;
struct layout *__unbounded next;
void *__unbounded sp;
void *__unbounded return_address;
};

11
sysdeps/generic/backtrace.c
View File

@ -1,5 +1,5 @@
/* Return backtrace of current program state. Generic version.
Copyright (C) 1998 Free Software Foundation, Inc.
Copyright (C) 1998, 2000 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
@ -22,6 +22,7 @@
#include <signal.h>
#include <frame.h>
#include <sigcontextinfo.h>
#include <bp-checks.h>
/* This is a global variable set at program start time. It marks the
highest used stack address. */
@ -54,7 +55,7 @@ extern void *__libc_stack_end;
/* By default assume the `next' pointer in struct layout points to the
next struct layout. */
#ifndef ADVANCE_STACK_FRAME
# define ADVANCE_STACK_FRAME(next) ((struct layout *) (next))
# define ADVANCE_STACK_FRAME(next) BOUNDED_1 ((struct layout *) (next))
#endif
int
@ -63,15 +64,15 @@ __backtrace (array, size)
int size;
{
struct layout *current;
void *top_frame;
void *top_stack;
void *__unbounded top_frame;
void *__unbounded top_stack;
int cnt = 0;
top_frame = __builtin_frame_address (0);
top_stack = CURRENT_STACK_FRAME;
/* We skip the call to this function, it makes no sense to record it. */
current = (struct layout *) top_frame;
current = BOUNDED_1 ((struct layout *) top_frame);
while (cnt < size)
{
if ((void *) current INNER_THAN top_stack

4
sysdeps/generic/frame.h
View File

@ -19,6 +19,6 @@
struct layout
{
void *next;
void *return_address;
void *__unbounded next;
void *__unbounded return_address;
};

14
sysdeps/generic/segfault.c
View File

@ -1,5 +1,5 @@
/* Catch segmentation faults and print backtrace.
Copyright (C) 1998, 1999 Free Software Foundation, Inc.
Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
@ -28,6 +28,8 @@
#include <unistd.h>
#include <stdio-common/_itoa.h>
#include <bp-checks.h>
/* Get the definition of "struct layout". */
#include <frame.h>
@ -69,7 +71,7 @@ extern void *__libc_stack_end;
/* By default assume the `next' pointer in struct layout points to the
next struct layout. */
#ifndef ADVANCE_STACK_FRAME
# define ADVANCE_STACK_FRAME(next) ((struct layout *) (next))
# define ADVANCE_STACK_FRAME(next) BOUNDED_1 ((struct layout *) (next))
#endif
/* We'll use tis a lot. */
@ -103,8 +105,8 @@ static void
catch_segfault (int signal, SIGCONTEXT ctx)
{
struct layout *current;
void *top_frame;
void *top_stack;
void *__unbounded top_frame;
void *__unbounded top_stack;
int fd;
void **arr;
size_t cnt;
@ -135,7 +137,7 @@ catch_segfault (int signal, SIGCONTEXT ctx)
/* First count how many entries we'll have. */
cnt = 1;
current = (struct layout *) top_frame;
current = BOUNDED_1 ((struct layout *) top_frame);
while (!((void *) current INNER_THAN top_stack
|| !((void *) current INNER_THAN __libc_stack_end)))
{
@ -149,7 +151,7 @@ catch_segfault (int signal, SIGCONTEXT ctx)
/* First handle the program counter from the structure. */
arr[0] = GET_PC (ctx);
current = (struct layout *) top_frame;
current = BOUNDED_1 ((struct layout *) top_frame);
cnt = 1;
while (!((void *) current INNER_THAN top_stack
|| !((void *) current INNER_THAN __libc_stack_end)))

9
sysdeps/i386/backtrace.c
View File

@ -1,5 +1,5 @@
/* Return backtrace of current program state.
Copyright (C) 1998 Free Software Foundation, Inc.
Copyright (C) 1998, 2000 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
@ -19,6 +19,7 @@
Boston, MA 02111-1307, USA. */
#include <execinfo.h>
#include <bp-checks.h>
/* This is a global variable set at program start time. It marks the
@ -36,8 +37,8 @@ extern void *__libc_stack_end;
*/
struct layout
{
struct layout *next;
void *return_address;
struct layout *__unbounded next;
void *__unbounded return_address;
};
int
@ -52,7 +53,7 @@ __backtrace (array, size)
int cnt = 0;
/* We skip the call to this function, it makes no sense to record it. */
current = (struct layout *) ebp;
current = BOUNDED_1 ((struct layout *) ebp);
while (cnt < size)
{
if ((void *) current < esp || (void *) current > __libc_stack_end)

10
sysdeps/powerpc/backtrace.c
View File

@ -1,5 +1,5 @@
/* Return backtrace of current program state.
Copyright (C) 1998 Free Software Foundation, Inc.
Copyright (C) 1998, 2000 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -19,6 +19,7 @@
#include <execinfo.h>
#include <stddef.h>
#include <bp-checks.h>
/* This is the stack layout we see with every stack frame.
Note that every routine is required by the ABI to lay out the stack
@ -32,8 +33,8 @@
*/
struct layout
{
struct layout *next;
void *return_address;
struct layout *__unbounded next;
void *__unbounded return_address;
};
int
@ -47,10 +48,11 @@ __backtrace (void **array, int size)
/* Get the address on top-of-stack. */
asm volatile ("lwz %0,0(1)" : "=r"(current));
current = BOUNDED_1 (current);
for ( count = 0;
current != NULL && count < size;
current = current->next, count++)
current = BOUNDED_1 (current->next), count++)
array[count] = current->return_address;
/* It's possible the second-last stack frame can't return

10
time/asctime.c
View File

@ -1,4 +1,4 @@
/* Copyright (C) 1991, 1993, 1995, 1996, 1997 Free Software Foundation, Inc.
/* Copyright (C) 1991, 1993, 1995, 1996, 1997, 2000 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -23,8 +23,8 @@
/* This is defined in locale/C-time.c in the GNU libc. */
extern const struct locale_data _nl_C_LC_TIME;
#define ab_day_name (&_nl_C_LC_TIME.values[_NL_ITEM_INDEX (ABDAY_1)].string)
#define ab_month_name (&_nl_C_LC_TIME.values[_NL_ITEM_INDEX (ABMON_1)].string)
#define ab_day_name(DAY) (_nl_C_LC_TIME.values[_NL_ITEM_INDEX (ABDAY_1)+(DAY)].string)
#define ab_month_name(MON) (_nl_C_LC_TIME.values[_NL_ITEM_INDEX (ABMON_1)+(MON)].string)
static const char format[] = "%.3s %.3s%3d %.2d:%.2d:%.2d %d\n";
static char result[ 3+1+ 3+1+20+1+20+1+20+1+20+1+20+1 + 1];
@ -49,9 +49,9 @@ __asctime_r (const struct tm *tp, char *buf)
if (sprintf (buf, format,
(tp->tm_wday < 0 || tp->tm_wday >= 7 ?
"???" : ab_day_name[tp->tm_wday]),
"???" : ab_day_name (tp->tm_wday)),
(tp->tm_mon < 0 || tp->tm_mon >= 12 ?
"???" : ab_month_name[tp->tm_mon]),
"???" : ab_month_name (tp->tm_mon)),
tp->tm_mday, tp->tm_hour, tp->tm_min,
tp->tm_sec, 1900 + tp->tm_year) < 0)
return NULL;