diff options
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/i386/dl-sysdep.h')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/i386/dl-sysdep.h | 31 |
1 files changed, 25 insertions, 6 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/i386/dl-sysdep.h b/nptl/sysdeps/unix/sysv/linux/i386/dl-sysdep.h index 29a77a08fa..a89eb0a62f 100644 --- a/nptl/sysdeps/unix/sysv/linux/i386/dl-sysdep.h +++ b/nptl/sysdeps/unix/sysv/linux/i386/dl-sysdep.h @@ -16,12 +16,31 @@ License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ -#ifndef _DL_SYSDEP_H -# include "i686/dl-sysdep.h" +#ifndef _LINUX_I386_DL_SYSDEP_H -/* sysenter/syscall is not useful on i386 through i586, but the dynamic - linker and dl code in libc.a has to be able to load i686 compiled - libraries. */ -# undef USE_DL_SYSINFO +#include_next <dl-sysdep.h> + +/* Traditionally system calls have been made using int $0x80. A + second method was introduced which, if possible, will use the + sysenter/syscall instructions. To signal the presence and where to + find the code the kernel passes an AT_SYSINFO value in the + auxiliary vector to the application. */ +#define NEED_DL_SYSINFO 1 + +#ifndef __ASSEMBLER__ +extern void _dl_sysinfo_int80 (void) attribute_hidden; +# define DL_SYSINFO_DEFAULT (uintptr_t) _dl_sysinfo_int80 +# define DL_SYSINFO_IMPLEMENTATION \ + asm (".text\n\t" \ + ".type _dl_sysinfo_int80,@function\n\t" \ + ".hidden _dl_sysinfo_int80\n" \ + CFI_STARTPROC "\n" \ + "_dl_sysinfo_int80:\n\t" \ + "int $0x80;\n\t" \ + "ret;\n\t" \ + CFI_ENDPROC "\n" \ + ".size _dl_sysinfo_int80,.-_dl_sysinfo_int80\n\t" \ + ".previous"); +#endif #endif /* dl-sysdep.h */ |