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author | Jakub Jelinek <jakub@redhat.com> | 2007-07-12 18:26:36 +0000 |
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committer | Jakub Jelinek <jakub@redhat.com> | 2007-07-12 18:26:36 +0000 |
commit | 0ecb606cb6cf65de1d9fc8a919bceb4be476c602 (patch) | |
tree | 2ea1f8305970753e4a657acb2ccc15ca3eec8e2c /sysdeps/unix/sysv/linux/i386/dl-cache.h | |
parent | 7d58530341304d403a6626d7f7a1913165fe2f32 (diff) | |
download | glibc-0ecb606cb6cf65de1d9fc8a919bceb4be476c602.tar.gz glibc-0ecb606cb6cf65de1d9fc8a919bceb4be476c602.tar.xz glibc-0ecb606cb6cf65de1d9fc8a919bceb4be476c602.zip |
2.5-18.1
Diffstat (limited to 'sysdeps/unix/sysv/linux/i386/dl-cache.h')
-rw-r--r-- | sysdeps/unix/sysv/linux/i386/dl-cache.h | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/i386/dl-cache.h b/sysdeps/unix/sysv/linux/i386/dl-cache.h new file mode 100644 index 0000000000..38a1c7dfb4 --- /dev/null +++ b/sysdeps/unix/sysv/linux/i386/dl-cache.h @@ -0,0 +1,59 @@ +/* Support for reading /etc/ld.so.cache files written by Linux ldconfig. + Copyright (C) 2004 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +static inline int +is_ia64 (void) +{ + unsigned int fl1, fl2; + + /* See if we can use cpuid. */ + __asm__ ("pushfl; pushfl; popl %0; movl %0,%1; xorl %2,%0;" + "pushl %0; popfl; pushfl; popl %0; popfl" + : "=&r" (fl1), "=&r" (fl2) + : "i" (0x00200000)); + if (((fl1 ^ fl2) & 0x00200000) == 0) + return 0; + + /* Host supports cpuid. See if cpuid gives capabilities, try + CPUID(0). Preserve %ebx and %ecx; cpuid insn clobbers these, we + don't need their CPUID values here, and %ebx may be the PIC + register. */ + __asm__ ("pushl %%ecx; pushl %%ebx; cpuid; popl %%ebx; popl %%ecx" + : "=a" (fl1) : "0" (0) : "edx", "cc"); + if (fl1 == 0) + return 0; + + /* Invoke CPUID(1), return %edx; caller can examine bits to + determine what's supported. */ + __asm__ ("pushl %%ecx; pushl %%ebx; cpuid; popl %%ebx; popl %%ecx" + : "=d" (fl2), "=a" (fl1) : "1" (1) : "cc"); + return (fl2 & (1 << 30)) != 0; +} + +#define arch_startup(argc, argv) \ + do { \ + /* On IA-64, try to execute 64-bit ldconfig if possible. \ + This is because the badly designed /emul/ia32-linux hack \ + will cause 32-bit ldconfig to do all sorts of weird things. */ \ + if (is_ia64 ()) \ + execv ("/emul/ia32-linux/../../sbin/ldconfig", \ + (char *const *) argv); \ + } while (0) + +#include_next <dl-cache.h> |