mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-26 15:00:06 +00:00
2ed5fd9a2a
2000-07-26 Greg McGary <greg@mcgary.org> * Makeconfig (+link-bounded, link-libc-bounded, link-extra-libs-bounded): New variables. (built-program-cmd): Omit $(run-program-prefix) for static BP tests. * Makerules (do-tests-clean, common-mostlyclean): Remove BP test files. * Rules (tests-bp.out): New variable. (tests): Conditionally add BP tests. (binaries-bounded): Add variable and associated rule. * csu/Makefile [build-bounded] (extra-objs, install-lib): Move conditional stuff after place where condition is defined. * malloc/malloc.c (bp-checks.h): Add #include. (mem2chunk, chunk_at_offset, bin_at): Wrap BOUNDED_1 around expression. (_bin_at): Add unbounded version of bin_at. (IAV, chunk_alloc): Use unbounded _bin_at. (mALLOc, rEALLOc, chunk_realloc, mEMALIGn, cALLOc, chunk2mem_check, realloc_check, malloc_starter, malloc_atfork): Wrap BOUNDED_N around return value. (chunk_realloc): Adjust oldsize once. * sysdeps/generic/bp-checks.h (__memchr): Remove incorrect decl. (__ubp_memchr): Add correct decl. (_CHECK_STRING): Use __ubp_memchr. * sysdeps/alpha/memchr.S [!__BOUNDED_POINTERS__] (__ubp_memchr): New alias for unbounded-pointer __memchr. * sysdeps/i386/memchr.S: Likewise. * sysdeps/ia64/memchr.S: Likewise. * sysdeps/m68k/memchr.S: Likewise. * sysdeps/sparc/sparc32/memchr.S: Likewise. * sysdeps/sparc/sparc64/memchr.S: Likewise. * sysdeps/vax/memchr.s: Likewise. * sysdeps/i386/strtok.S: Fix bounds checks to pass tests. (SAVE_PTR): New macro. (save_ptr): Expand size as BP. (strtok): Don't bother to write into SAVE_PTR when returning NULL. * sysdeps/i386/i686/strtok.S: Likewise. * sysdeps/i386/bp-asm.h (RETURN_BOUNDED_POINTER, RETURN_NULL_BOUNDED_POINTER): Use %ecx as the scratch register. * sysdeps/i386/bits/string.h [!__BOUNDED_POINTERS__]: Disable inlines. * sysdeps/i386/i486/bits/string.h [!__BOUNDED_POINTERS__]: Likewise. * sysdeps/unix/sysv/linux/getsysstats.c (get_proc_path): Copy bounds of copy_result to mount_proc.
149 lines
3.3 KiB
ArmAsm
149 lines
3.3 KiB
ArmAsm
/* memchr (str, ch, n) -- Return pointer to first occurrence of CH in STR less
|
|
than N.
|
|
For SPARC v7.
|
|
Copyright (C) 1996,1999, 2000 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Jakub Jelinek <jj@ultra.linux.cz> and
|
|
David S. Miller <davem@caip.rutgers.edu>.
|
|
|
|
This version is developed using the same algorithm as the fast C
|
|
version which carries the following introduction:
|
|
|
|
Based on strlen implementation by Torbjorn Granlund (tege@sics.se),
|
|
with help from Dan Sahlin (dan@sics.se) and
|
|
commentary by Jim Blandy (jimb@ai.mit.edu);
|
|
adaptation to memchr suggested by Dick Karpinski (dick@cca.ucsf.edu),
|
|
and implemented by Roland McGrath (roland@ai.mit.edu).
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public License as
|
|
published by the Free Software Foundation; either version 2 of the
|
|
License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#include <sysdep.h>
|
|
|
|
.text
|
|
.align 4
|
|
0: cmp %o2, 0
|
|
be 9f
|
|
sethi %hi(0x80808080), %o4
|
|
ldub [%o0], %g4
|
|
cmp %g4, %o1
|
|
be 1f
|
|
add %o0, 1, %o0
|
|
subcc %o2, 1, %o2
|
|
be 9f
|
|
andcc %o0, 3, %g0
|
|
be 4f
|
|
or %o4, %lo(0x80808080), %o3
|
|
ldub [%o0], %g4
|
|
cmp %g4, %o1
|
|
be 1f
|
|
add %o0, 1, %o0
|
|
subcc %o2, 1, %o2
|
|
be 9f
|
|
andcc %o0, 3, %g0
|
|
be 5f
|
|
sethi %hi(0x01010101), %o5
|
|
ldub [%o0], %g4
|
|
cmp %g4, %o1
|
|
be 1f
|
|
add %o0, 1, %o0
|
|
subcc %o2, 1, %o2
|
|
bne,a 7f
|
|
and %o2, 3, %g1
|
|
retl
|
|
clr %o0
|
|
1: retl
|
|
sub %o0, 1, %o0
|
|
|
|
ENTRY(__memchr)
|
|
andcc %o1, 0xff, %o1
|
|
sll %o1, 8, %g7
|
|
andcc %o0, 3, %g0
|
|
or %o1, %g7, %g7
|
|
sll %g7, 16, %o3
|
|
bne 0b
|
|
or %o3, %g7, %g2
|
|
sethi %hi(0x80808080), %o4
|
|
or %o4, %lo(0x80808080), %o3
|
|
4: sethi %hi(0x01010101), %o5
|
|
5: and %o2, 3, %g1
|
|
7: andcc %o2, 0xfffffffc, %o2
|
|
be 0f
|
|
or %o5, %lo(0x01010101), %g7
|
|
ld [%o0], %g4
|
|
6: xor %g4, %g2, %g5
|
|
add %o0, 4, %o0
|
|
sub %g5, %g7, %g5
|
|
andcc %g5, %o3, %g0
|
|
bne 8f
|
|
subcc %o2, 4, %o2
|
|
bne,a 6b
|
|
ld [%o0], %g4
|
|
0: cmp %g1, 0
|
|
1: be 9f
|
|
add %o0, 4, %o0
|
|
ldub [%o0 - 4], %g4
|
|
cmp %g4, %o1
|
|
be 4f
|
|
cmp %g1, 1
|
|
be 9f
|
|
ldub [%o0 - 3], %g4
|
|
cmp %g4, %o1
|
|
be 3f
|
|
cmp %g1, 2
|
|
be 9f
|
|
ldub [%o0 - 2], %g4
|
|
cmp %g4, %o1
|
|
be 2f
|
|
nop
|
|
9: retl
|
|
clr %o0
|
|
|
|
/* Check every byte. */
|
|
8: srl %g4, 24, %g5
|
|
and %g5, 0xff, %g5
|
|
cmp %g5, %o1
|
|
be 4f
|
|
srl %g4, 16, %g5
|
|
and %g5, 0xff, %g5
|
|
cmp %g5, %o1
|
|
be 3f
|
|
srl %g4, 8, %g5
|
|
and %g5, 0xff, %g5
|
|
cmp %g5, %o1
|
|
be 2f
|
|
and %g4, 0xff, %g5
|
|
cmp %g5, %o1
|
|
be 1f
|
|
cmp %o2, 0
|
|
bne,a 6b
|
|
ld [%o0], %g4
|
|
b 1b
|
|
cmp %g1, 0
|
|
1: retl
|
|
sub %o0, 1, %o0
|
|
2: retl
|
|
sub %o0, 2, %o0
|
|
3: retl
|
|
sub %o0, 3, %o0
|
|
4: retl
|
|
sub %o0, 4, %o0
|
|
END(__memchr)
|
|
|
|
weak_alias (__memchr, memchr)
|
|
#if !__BOUNDED_POINTERS__
|
|
weak_alias (__memchr, __ubp_memchr)
|
|
#endif
|