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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
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than N.
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For SPARC v7.
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Copyright (C) 1996,1999, 2000 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Jakub Jelinek <jj@ultra.linux.cz> and
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David S. Miller <davem@caip.rutgers.edu>.
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This version is developed using the same algorithm as the fast C
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version which carries the following introduction:
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Based on strlen implementation by Torbjorn Granlund (tege@sics.se),
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with help from Dan Sahlin (dan@sics.se) and
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commentary by Jim Blandy (jimb@ai.mit.edu);
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adaptation to memchr suggested by Dick Karpinski (dick@cca.ucsf.edu),
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and implemented by Roland McGrath (roland@ai.mit.edu).
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <sysdep.h>
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.text
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.align 4
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0: cmp %o2, 0
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be 9f
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sethi %hi(0x80808080), %o4
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ldub [%o0], %g4
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cmp %g4, %o1
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be 1f
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add %o0, 1, %o0
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subcc %o2, 1, %o2
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be 9f
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andcc %o0, 3, %g0
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be 4f
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or %o4, %lo(0x80808080), %o3
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ldub [%o0], %g4
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cmp %g4, %o1
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be 1f
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add %o0, 1, %o0
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subcc %o2, 1, %o2
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be 9f
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andcc %o0, 3, %g0
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be 5f
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sethi %hi(0x01010101), %o5
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ldub [%o0], %g4
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cmp %g4, %o1
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be 1f
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add %o0, 1, %o0
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subcc %o2, 1, %o2
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bne,a 7f
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and %o2, 3, %g1
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retl
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clr %o0
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1: retl
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sub %o0, 1, %o0
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ENTRY(__memchr)
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andcc %o1, 0xff, %o1
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sll %o1, 8, %g7
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andcc %o0, 3, %g0
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or %o1, %g7, %g7
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sll %g7, 16, %o3
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bne 0b
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or %o3, %g7, %g2
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sethi %hi(0x80808080), %o4
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or %o4, %lo(0x80808080), %o3
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4: sethi %hi(0x01010101), %o5
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5: and %o2, 3, %g1
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7: andcc %o2, 0xfffffffc, %o2
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be 0f
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or %o5, %lo(0x01010101), %g7
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ld [%o0], %g4
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6: xor %g4, %g2, %g5
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add %o0, 4, %o0
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sub %g5, %g7, %g5
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andcc %g5, %o3, %g0
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bne 8f
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subcc %o2, 4, %o2
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bne,a 6b
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ld [%o0], %g4
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0: cmp %g1, 0
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1: be 9f
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add %o0, 4, %o0
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ldub [%o0 - 4], %g4
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cmp %g4, %o1
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be 4f
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cmp %g1, 1
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be 9f
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ldub [%o0 - 3], %g4
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cmp %g4, %o1
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be 3f
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cmp %g1, 2
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be 9f
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ldub [%o0 - 2], %g4
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cmp %g4, %o1
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be 2f
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nop
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9: retl
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clr %o0
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/* Check every byte. */
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8: srl %g4, 24, %g5
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and %g5, 0xff, %g5
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cmp %g5, %o1
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be 4f
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srl %g4, 16, %g5
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and %g5, 0xff, %g5
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cmp %g5, %o1
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be 3f
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srl %g4, 8, %g5
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and %g5, 0xff, %g5
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cmp %g5, %o1
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be 2f
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and %g4, 0xff, %g5
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cmp %g5, %o1
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be 1f
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cmp %o2, 0
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bne,a 6b
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ld [%o0], %g4
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b 1b
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cmp %g1, 0
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1: retl
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sub %o0, 1, %o0
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2: retl
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sub %o0, 2, %o0
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3: retl
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sub %o0, 3, %o0
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4: retl
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sub %o0, 4, %o0
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END(__memchr)
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weak_alias (__memchr, memchr)
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#if !__BOUNDED_POINTERS__
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weak_alias (__memchr, __ubp_memchr)
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#endif
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