diff options
Diffstat (limited to 'sysdeps/x86_64')
| -rw-r--r-- | sysdeps/x86_64/memchr.S | 7 | ||||
| -rw-r--r-- | sysdeps/x86_64/x32/Makefile | 4 | ||||
| -rw-r--r-- | sysdeps/x86_64/x32/test-size_t.h | 35 | ||||
| -rw-r--r-- | sysdeps/x86_64/x32/tst-size_t-memchr.c | 72 |
4 files changed, 116 insertions, 2 deletions
diff --git a/sysdeps/x86_64/memchr.S b/sysdeps/x86_64/memchr.S index a205a25998..871e75e2da 100644 --- a/sysdeps/x86_64/memchr.S +++ b/sysdeps/x86_64/memchr.S @@ -24,9 +24,12 @@ ENTRY(memchr) movd %rsi, %xmm1 mov %rdi, %rcx - +#ifdef __ILP32__ + /* Clear the upper 32 bits. */ + movl %edx, %edx +#endif punpcklbw %xmm1, %xmm1 - test %rdx, %rdx + test %RDX_LP, %RDX_LP jz L(return_null) punpcklbw %xmm1, %xmm1 diff --git a/sysdeps/x86_64/x32/Makefile b/sysdeps/x86_64/x32/Makefile index f2ebc24fb0..979273b3a8 100644 --- a/sysdeps/x86_64/x32/Makefile +++ b/sysdeps/x86_64/x32/Makefile @@ -4,3 +4,7 @@ ifeq ($(subdir),math) # 64-bit llround. Add -fno-builtin-lround to silence the compiler. CFLAGS-s_llround.c += -fno-builtin-lround endif + +ifeq ($(subdir),string) +tests += tst-size_t-memchr +endif diff --git a/sysdeps/x86_64/x32/test-size_t.h b/sysdeps/x86_64/x32/test-size_t.h new file mode 100644 index 0000000000..78a940863e --- /dev/null +++ b/sysdeps/x86_64/x32/test-size_t.h @@ -0,0 +1,35 @@ +/* Test string/memory functions with size_t in the lower 32 bits of + 64-bit register. + Copyright (C) 2019 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 + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#define TEST_MAIN +#include <string/test-string.h> + +/* On x32, parameter_t may be passed in a 64-bit register with the LEN + field in the lower 32 bits. When the LEN field of 64-bit register + is passed to string/memory function as the size_t parameter, only + the lower 32 bits can be used. */ +typedef struct +{ + union + { + size_t len; + void (*fn) (void); + }; + void *p; +} parameter_t; diff --git a/sysdeps/x86_64/x32/tst-size_t-memchr.c b/sysdeps/x86_64/x32/tst-size_t-memchr.c new file mode 100644 index 0000000000..ac77b86c08 --- /dev/null +++ b/sysdeps/x86_64/x32/tst-size_t-memchr.c @@ -0,0 +1,72 @@ +/* Test memchr with size_t in the lower 32 bits of 64-bit register. + Copyright (C) 2019 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 + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#ifndef WIDE +# define TEST_NAME "memchr" +#else +# define TEST_NAME "wmemchr" +#endif /* WIDE */ +#include "test-size_t.h" + +#ifndef WIDE +# define MEMCHR memchr +# define CHAR char +# define UCHAR unsigned char +#else +# include <wchar.h> +# define MEMCHR wmemchr +# define CHAR wchar_t +# define UCHAR wchar_t +#endif /* WIDE */ + +IMPL (MEMCHR, 1) + +typedef CHAR * (*proto_t) (const CHAR*, int, size_t); + +static CHAR * +__attribute__ ((noinline, noclone)) +do_memchr (parameter_t a, parameter_t b) +{ + return CALL (&b, a.p, (uintptr_t) b.p, a.len); +} + +static int +test_main (void) +{ + test_init (); + + parameter_t src = { { page_size / sizeof (CHAR) }, buf2 }; + parameter_t c = { { 0 }, (void *) (uintptr_t) 0x12 }; + + int ret = 0; + FOR_EACH_IMPL (impl, 0) + { + c.fn = impl->fn; + CHAR *res = do_memchr (src, c); + if (res) + { + error (0, 0, "Wrong result in function %s: %p != NULL", + impl->name, res); + ret = 1; + } + } + + return ret ? EXIT_FAILURE : EXIT_SUCCESS; +} + +#include <test-skeleton.c> |