From: Greg McGary Date: Mon, 17 Jul 2000 22:36:16 +0000 (+0000) Subject: * sysdeps/generic/bp-checks.h: Use unbounded __memchr X-Git-Tag: upstream/2.30~25096 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=abf7063390f46bd484d00c6a2d103a52cf058bd6;p=external%2Fglibc.git * sysdeps/generic/bp-checks.h: Use unbounded __memchr rather than non-existent __ubp_memchr. (CHECK_STRINGopt, CHECK_FCNTL, BOUNDED_N, BOUNDED_1): New macros. (_CHECK_STRING, _CHECK_N): New macros. (CHECK_STRING, CHECK_N, CHECK_Nopt): Rewrite in terms of _CHECK_*. (CHECK_IOCTL): Move inside `#if !__ASSEMBLER__'. * sysdeps/alpha/memchr.S: Change strong name to "__memchr". Add weak alias "memchr". * sysdeps/generic/memchr.c: Likewise. * 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/generic/bp-checks.h: Use unbounded __memchr rather than non-existent __ubp_memchr. (CHECK_STRINGopt, CHECK_FCNTL, BOUNDED_N, BOUNDED_1): New macros. (_CHECK_STRING, _CHECK_N): New macros. (CHECK_STRING, CHECK_N, CHECK_Nopt): Rewrite in terms of _CHECK_*. (CHECK_IOCTL): Move inside `#if !__ASSEMBLER__'. * sysdeps/alpha/memchr.S: Change strong name to "__memchr". Add weak alias "memchr". * sysdeps/generic/memchr.c: Likewise. * 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. --- diff --git a/ChangeLog b/ChangeLog index 86ba936..4c79067 100644 --- a/ChangeLog +++ b/ChangeLog @@ -35,6 +35,22 @@ * string/Makefile (o-objects.ob): Add variable to pull unbounded versions of memcpy, memset and memchr into libc_b. + * sysdeps/generic/bp-checks.h: Use unbounded __memchr + rather than non-existent __ubp_memchr. + (CHECK_STRINGopt, CHECK_FCNTL, BOUNDED_N, BOUNDED_1): New macros. + (_CHECK_STRING, _CHECK_N): New macros. + (CHECK_STRING, CHECK_N, CHECK_Nopt): Rewrite in terms of _CHECK_*. + (CHECK_IOCTL): Move inside `#if !__ASSEMBLER__'. + * sysdeps/alpha/memchr.S: Change strong name to "__memchr". + Add weak alias "memchr". + * sysdeps/generic/memchr.c: Likewise. + * 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. + 2000-07-17 Bruno Haible * iconv/gconv_open.c (__gconv_open): Initialize the __data diff --git a/sysdeps/alpha/memchr.S b/sysdeps/alpha/memchr.S index 0ea4aa1..58899f3 100644 --- a/sysdeps/alpha/memchr.S +++ b/sysdeps/alpha/memchr.S @@ -1,4 +1,4 @@ -/* Copyright (C) 1996 Free Software Foundation, Inc. +/* Copyright (C) 1996, 2000 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by David Mosberger (davidm@cs.arizona.edu). @@ -37,7 +37,7 @@ For correctness consider that: .set noreorder .set noat -ENTRY(memchr) +ENTRY(__memchr) #ifdef PROF ldgp gp, 0(pv) lda AT, _mcount @@ -167,4 +167,6 @@ $not_found: mov zero, v0 #-e0 : ret # .. e1 : - END(memchr) + END(__memchr) + +weak_alias (__stpcpy, stpcpy) diff --git a/sysdeps/generic/bp-checks.h b/sysdeps/generic/bp-checks.h index ea71cf8..349bd81 100644 --- a/sysdeps/generic/bp-checks.h +++ b/sysdeps/generic/bp-checks.h @@ -21,83 +21,101 @@ Boston, MA 02111-1307, USA. */ #ifndef _bp_checks_h_ -# define _bp_checks_h_ 1 +#define _bp_checks_h_ 1 -# if !__ASSEMBLER__ +#if __BOUNDED_POINTERS__ -# if __BOUNDED_POINTERS__ - -/* GKM FIXME: when gcc is ready, add real bounds checks */ -# define BOUNDS_VIOLATED (__builtin_trap (), 0) -extern int __ubp_memchr (const char *__unbounded, int, unsigned); +# define BOUNDS_VIOLATED (__builtin_trap (), 0) +extern int __memchr (const char *__unbounded, int, unsigned); /* Verify that pointer's value >= low. Return pointer value. */ -# define CHECK_BOUNDS_LOW(ARG) \ +# define CHECK_BOUNDS_LOW(ARG) \ (((__ptrvalue (ARG) < __ptrlow (ARG)) && BOUNDS_VIOLATED), \ __ptrvalue (ARG)) /* Verify that pointer's value < high. Return pointer value. */ -# define CHECK_BOUNDS_HIGH(ARG) \ +# define CHECK_BOUNDS_HIGH(ARG) \ (((__ptrvalue (ARG) > __ptrhigh (ARG)) && BOUNDS_VIOLATED), \ __ptrvalue (ARG)) -/* Check bounds of a pointer seated to a single object. */ -# define CHECK_1(ARG) CHECK_N ((ARG), 1) +# define _CHECK_N(ARG, N, COND) \ + (((COND) \ + && (__ptrvalue (ARG) < __ptrlow (ARG) \ + || __ptrvalue (ARG) + (N) > __ptrhigh (ARG)) \ + && BOUNDS_VIOLATED), \ + __ptrvalue (ARG)) -/* Same as CHECK_1, but tolerate ARG == NULL. */ -# define CHECK_1opt(ARG) CHECK_Nopt ((ARG), 1) +# define _CHECK_STRING(ARG, COND) \ + (((COND) \ + && (__ptrvalue (ARG) < __ptrlow (ARG) \ + || !__memchr (__ptrvalue (ARG), '\0', \ + (__ptrhigh (ARG) - __ptrvalue (ARG)))) \ + && BOUNDS_VIOLATED), \ + __ptrvalue (ARG)) /* Check bounds of a pointer seated to an array of N objects. */ -# define CHECK_N(ARG, N) \ - (((__ptrvalue (ARG) < __ptrlow (ARG) \ - || __ptrvalue (ARG) + (N) > __ptrhigh (ARG)) \ - && BOUNDS_VIOLATED), __ptrvalue (ARG)) - +# define CHECK_N(ARG, N) _CHECK_N ((ARG), (N), 1) /* Same as CHECK_N, but tolerate ARG == NULL. */ -# define CHECK_Nopt(ARG, N) \ - (((__ptrvalue (ARG) \ - && (__ptrvalue (ARG) < __ptrlow (ARG) \ - || __ptrvalue (ARG) + (N) > __ptrhigh (ARG))) \ - && BOUNDS_VIOLATED), __ptrvalue (ARG)) - -/* Check for NUL-terminator within string's bounds. */ -# define CHECK_STRING(ARG) \ - (((__ptrvalue (ARG) < __ptrlow (ARG) \ - || !__ubp_memchr (__ptrvalue (ARG), '\0', \ - (__ptrhigh (ARG) - __ptrvalue (ARG)))) \ - && BOUNDS_VIOLATED), \ - __ptrvalue (ARG)) +# define CHECK_Nopt(ARG, N) _CHECK_N ((ARG), (N), __ptrvalue (ARG)) -# define CHECK_SIGSET(SET) CHECK_N ((SET), _NSIG / (8 * sizeof *(SET))) -# define CHECK_SIGSETopt(SET) CHECK_Nopt ((SET), _NSIG / (8 * sizeof *(SET))) +/* Check bounds of a pointer seated to a single object. */ +# define CHECK_1(ARG) CHECK_N ((ARG), 1) +/* Same as CHECK_1, but tolerate ARG == NULL. */ +# define CHECK_1opt(ARG) CHECK_Nopt ((ARG), 1) -# else /* !__BOUNDED_POINTERS__ */ +/* Check for NUL-terminator within string's bounds. */ +# define CHECK_STRING(ARG) _CHECK_STRING ((ARG), 1) +/* Same as CHECK_STRING, but tolerate ARG == NULL. */ +# define CHECK_STRINGopt(ARG) _CHECK_STRING ((ARG), __ptrvalue (ARG)) + +/* Check bounds of signal syscall args with type sigset_t. */ +# define CHECK_SIGSET(SET) CHECK_N ((SET), _NSIG / (8 * sizeof *(SET))) +/* Same as CHECK_SIGSET, but tolerate SET == NULL. */ +# define CHECK_SIGSETopt(SET) CHECK_Nopt ((SET), _NSIG / (8 * sizeof *(SET))) + +# if defined (_IOC_SIZESHIFT) && defined (_IOC_SIZEBITS) +/* Extract the size of the ioctl data and check its bounds. */ +# define CHECK_IOCTL(ARG, CMD) \ + CHECK_N ((const char *) (ARG), \ + (((CMD) >> _IOC_SIZESHIFT) & ((1 << _IOC_SIZEBITS) - 1))) +# else +/* We don't know the size of the ioctl data, so the best we can do + is check that the first byte is within bounds. */ +# define CHECK_IOCTL(ARG, CMD) CHECK_1 ((const char *) ARG) +# endif + +/* Check bounds of `struct flock *' for the locking fcntl commands. */ +# define CHECK_FCNTL(ARG, CMD) \ + (((CMD) == F_GETLK || (CMD) == F_SETLK || (CMD) == F_SETLKW) \ + ? CHECK_1 ((struct flock *) ARG) : (unsigned long) (ARG)) + +/* Return a bounded pointer with value PTR that satisfies CHECK_N (PTR, N). */ +# define BOUNDED_N(PTR, N) \ + ({ __typeof (*(PTR)) *__bounded _p_; \ + __ptrvalue _p_ = __ptrlow _p_ = __ptrvalue (PTR); \ + __ptrhigh _p_ = __ptrvalue _p_ + (N); \ + _p_; }) + +#else /* !__BOUNDED_POINTERS__ */ /* Do nothing if not compiling with -fbounded-pointers. */ -# define BOUNDS_VIOLATED -# define CHECK_BOUNDS_LOW(ARG) (ARG) -# define CHECK_BOUNDS_HIGH(ARG) (ARG) -# define CHECK_1(ARG) (ARG) -# define CHECK_1opt(ARG) (ARG) -# define CHECK_N(ARG, N) (ARG) -# define CHECK_Nopt(ARG, N) (ARG) -# define CHECK_STRING(ARG) (ARG) -# define CHECK_SIGSET(SET) (SET) -# define CHECK_SIGSETopt(SET) (SET) - -# endif /* !__BOUNDED_POINTERS__ */ - -# if defined (_IOC_SIZESHIFT) && defined (_IOC_SIZEBITS) - -/* Extract the size of the ioctl parameter argument and check its bounds. */ -# define CHECK_IOCTL(ARG, CMD) \ - CHECK_N ((ARG), (((CMD) >> _IOC_SIZESHIFT) & ((1 << _IOC_SIZEBITS) - 1))) - -# else -# define CHECK_IOCTL(ARG, CMD) __ptrvalue (ARG) -# endif - -# endif /* !__ASSEMBLER__ */ +# define BOUNDS_VIOLATED +# define CHECK_BOUNDS_LOW(ARG) (ARG) +# define CHECK_BOUNDS_HIGH(ARG) (ARG) +# define CHECK_1(ARG) (ARG) +# define CHECK_1opt(ARG) (ARG) +# define CHECK_N(ARG, N) (ARG) +# define CHECK_Nopt(ARG, N) (ARG) +# define CHECK_STRING(ARG) (ARG) +# define CHECK_SIGSET(SET) (SET) +# define CHECK_SIGSETopt(SET) (SET) +# define CHECK_IOCTL(ARG, CMD) (ARG) +# define CHECK_FCNTL(ARG, CMD) (ARG) +# define BOUNDED_N(PTR, N) (PTR) + +#endif /* !__BOUNDED_POINTERS__ */ + +#define BOUNDED_1(PTR) BOUNDED_N (PTR, 1) #endif /* _bp_checks_h_ */ diff --git a/sysdeps/generic/memchr.c b/sysdeps/generic/memchr.c index 60bd8c6..a616daa 100644 --- a/sysdeps/generic/memchr.c +++ b/sysdeps/generic/memchr.c @@ -50,13 +50,14 @@ #endif #include +#include #undef memchr /* Search no more than N bytes of S for C. */ __ptr_t -memchr (s, c_in, n) +__memchr (s, c_in, n) const __ptr_t s; int c_in; size_t n; @@ -200,3 +201,4 @@ memchr (s, c_in, n) return 0; } +weak_alias (__memrchr, BP_SYM (memrchr)) diff --git a/sysdeps/i386/memchr.S b/sysdeps/i386/memchr.S index 9ff4126..098e413 100644 --- a/sysdeps/i386/memchr.S +++ b/sysdeps/i386/memchr.S @@ -42,7 +42,7 @@ #define LEN CHR+4 .text -ENTRY (BP_SYM (memchr)) +ENTRY (BP_SYM (__memchr)) ENTER /* Save callee-safe registers used in this function. */ @@ -325,4 +325,6 @@ L(pop): popl %edi /* pop saved registers */ LEAVE RET_PTR -END (BP_SYM (memchr)) +END (BP_SYM (__memchr)) + +weak_alias (BP_SYM (__memchr), BP_SYM (memchr)) diff --git a/sysdeps/ia64/memchr.S b/sysdeps/ia64/memchr.S index 600f5c7..40f2bd0 100644 --- a/sysdeps/ia64/memchr.S +++ b/sysdeps/ia64/memchr.S @@ -56,7 +56,7 @@ #define str in0 -ENTRY(memchr) +ENTRY(__memchr) alloc saved_pfs = ar.pfs, 3, 0, 29, 32 #include "softpipe.h" .rotr value[MEMLAT+1], addr[MEMLAT+3], aux[2], poschr[2] @@ -121,4 +121,6 @@ ENTRY(memchr) mov ar.lc = saved_lc br.ret.sptk.many b0 -END(memchr) +END(__memchr) + +weak_alias (__memchr, memchr) diff --git a/sysdeps/m68k/memchr.S b/sysdeps/m68k/memchr.S index a1599f8..968c129 100644 --- a/sysdeps/m68k/memchr.S +++ b/sysdeps/m68k/memchr.S @@ -1,7 +1,7 @@ /* memchr (str, ch, n) -- Return pointer to first occurrence of CH in the first N bytes of STR. For Motorola 68000. - Copyright (C) 1999 Free Software Foundation, Inc. + Copyright (C) 1999, 2000 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Andreas Schwab . @@ -24,7 +24,7 @@ #include "asm-syntax.h" TEXT -ENTRY(memchr) +ENTRY(__memchr) /* Save the callee-saved registers we use. */ moveml R(d2)-R(d4),MEM_PREDEC(sp) @@ -223,6 +223,6 @@ L(L9:) movel R(a0),R(d0) moveml MEM_POSTINC(sp),R(d2)-R(d4) rts -END(strchr) +END(__memchr) -weak_alias (strchr, index) +weak_alias (__memchr, memchr) diff --git a/sysdeps/sparc/sparc32/memchr.S b/sysdeps/sparc/sparc32/memchr.S index 270216e..b770af1 100644 --- a/sysdeps/sparc/sparc32/memchr.S +++ b/sysdeps/sparc/sparc32/memchr.S @@ -1,7 +1,7 @@ /* memchr (str, ch, n) -- Return pointer to first occurrence of CH in STR less than N. For SPARC v7. - Copyright (C) 1996,1999 Free Software Foundation, Inc. + Copyright (C) 1996,1999, 2000 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Jakub Jelinek and David S. Miller . @@ -67,7 +67,7 @@ 1: retl sub %o0, 1, %o0 -ENTRY(memchr) +ENTRY(__memchr) andcc %o1, 0xff, %o1 sll %o1, 8, %g7 andcc %o0, 3, %g0 @@ -140,4 +140,6 @@ ENTRY(memchr) sub %o0, 3, %o0 4: retl sub %o0, 4, %o0 -END(memchr) +END(__memchr) + +weak_alias (__memchr, memchr) diff --git a/sysdeps/sparc/sparc64/memchr.S b/sysdeps/sparc/sparc64/memchr.S index 1662f60..36446b6 100644 --- a/sysdeps/sparc/sparc64/memchr.S +++ b/sysdeps/sparc/sparc64/memchr.S @@ -1,7 +1,7 @@ /* memchr (str, ch, n) -- Return pointer to first occurrence of CH in STR less than N. For SPARC v9. - 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 Jan Vondrak and Jakub Jelinek . @@ -57,7 +57,7 @@ .text .align 32 -ENTRY(memchr) +ENTRY(__memchr) and %o1, 0xff, %o1 /* IEU0 Group */ #ifdef USE_BPR brz,pn %o2, 12f /* CTI+IEU1 */ @@ -256,4 +256,6 @@ ENTRY(memchr) 23: retl /* CTI+IEU1 Group */ add %o0, -1, %o0 /* IEU0 */ -END(memchr) +END(__memchr) + +weak_alias (__memchr, memchr) diff --git a/sysdeps/vax/memchr.s b/sysdeps/vax/memchr.s index 18120b0..22a8c2d 100644 --- a/sysdeps/vax/memchr.s +++ b/sysdeps/vax/memchr.s @@ -45,7 +45,7 @@ #include "DEFS.h" -ENTRY(memchr, 0) +ENTRY(__memchr, 0) movq 4(ap),r1 # r1 = cp; r2 = c movl 12(ap),r0 # r0 = n movzwl $65535,r4 # handy constant @@ -67,3 +67,6 @@ ENTRY(memchr, 0) decw r0 # from 0 to 65535 subl2 r0,r4 # adjust n brb 0b # and loop + +weak_alias (__memchr, memchr) + \ No newline at end of file