+2002-12-18 Ulrich Drepper <drepper@redhat.com>
+
+ * descr.h (struct pthread) [NEED_DL_SYSINFO]: Add sysinfo member.
+ * sysdeps/i386/tls.h (tcbhead_t): Add sysinfo member.
+ Define SYSINFO_OFFSEET if NEED_DL_SYSINFO is defined.
+ (INIT_SYSINFO): New #define.
+ (TLS_TP_INIT): Use INIT_SYSINFO.
+ * sysdeps/unix/sysv/linux/libc_pthread_init.c (__libc_pthread_init):
+ At test to make sure SYSINFO_OFFSET value is correct.
+ * sysdeps/unix/sysv/linux/i386/dl-sysdep.h: New file.
+
2002-12-18 Jakub Jelinek <jakub@redhat.com>
* sysdeps/pthread/flockfile.c (flockfile): Change into weak alias.
struct pthread *self; /* Pointer to this structure */
list_t list;
int multiple_threads;
+#ifdef NEED_DL_SYSINFO
+ uintptr_t sysinfo;
+#endif
} data;
void *__padding[16];
} header;
void *self; /* Pointer to the thread descriptor. */
list_t list;
int multiple_threads;
+ uintptr_t sysinfo;
} tcbhead_t;
#endif
/* Offset of the MULTIPLE_THREADS element in tcbhead_t. */
#define MULTIPLE_THREADS_OFFSET 20
+#ifdef NEED_DL_SYSINFO
+/* Offset of the SYSINFO element in tcbhead_t. */
+# define SYSINFO_OFFSET 24
+#endif
+
#ifndef __ASSEMBLER__
/* Get system call information. */
# define TLS_LOAD_EBX
# endif
+#if defined NEED_DL_SYSINFO && defined SHARED
+# define INIT_SYSINFO \
+ _head->sysinfo = GL(dl_sysinfo)
+#else
+# define INIT_SYSINFO
+#endif
+
/* Code to initially initialize the thread pointer. This might need
special attention since 'errno' is not yet available and if the
operation can cause a failure 'errno' must not be touched. */
_head->tcb = _thrdescr; \
/* For now the thread descriptor is at the same address. */ \
_head->self = _thrdescr; \
+ /* New syscall handling support. */ \
+ INIT_SYSINFO; \
\
/* The 'entry_number' field. Let the kernel pick a value. */ \
if (secondcall) \
--- /dev/null
+/* System-specific settings for dynamic linker code. Generic version.
+ Copyright (C) 2002 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. */
+
+#ifndef _DL_SYSDEP_H
+#define _DL_SYSDEP_H 1
+
+/* This macro must be defined to either 0 or 1.
+
+ If 1, then an errno global variable hidden in ld.so will work right with
+ all the errno-using libc code compiled for ld.so, and there is never a
+ need to share the errno location with libc. This is appropriate only if
+ all the libc functions that ld.so uses are called without PLT and always
+ get the versions linked into ld.so rather than the libc ones. */
+
+#define RTLD_PRIVATE_ERRNO 1
+
+
+/* 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
+
+#if defined NEED_DL_SYSINFO && !defined __ASSEMBLER__
+extern void _dl_sysinfo_int80 (void) attribute_hidden;
+# define DL_SYSINFO_DEFAULT _dl_sysinfo_int80
+# define DL_SYSINFO_IMPLEMENTATION \
+ asm (".type _dl_sysinfo_int80,@function\n\t" \
+ ".hidden _dl_sysinfo_int80\n" \
+ "_dl_sysinfo_int80:\n\t" \
+ "int $0x80;\n\t" \
+ "ret;\n\t" \
+ ".size _dl_sysinfo_int80,.-_dl_sysinfo_int80");
+#endif
+
+#endif /* dl-sysdep.h */
#include <unistd.h>
#include <list.h>
#include "fork.h"
+#include <dl-sysdep.h>
#include <tls.h>
#include <string.h>
#include <pthreadP.h>
str_n_len ("*** MULTIPLE_THREADS_OFFSET out of date\n"));
_exit (1);
}
+#ifdef SYSINFO_OFFSET
+ if (offsetof (struct pthread, header.data.sysinfo) != SYSINFO_OFFSET)
+ {
+ __libc_write (STDERR_FILENO,
+ str_n_len ("*** SYSINFO_OFFSET out of date\n"));
+ _exit (1);
+ }
+#endif
}
int
__brk (void *addr)
{
- void *__unbounded newbrk, *__unbounded scratch;
-
- asm ("movl %%ebx, %1\n\t" /* Save %ebx in scratch register. */
- "movl %3, %%ebx\n\t" /* Put ADDR in %ebx to be syscall arg. */
- ENTER_KERNEL "\n\t" /* Perform the system call. */
- "movl %1, %%ebx" /* Restore %ebx from scratch register. */
- : "=a" (newbrk), "=r" (scratch)
- : "0" (SYS_ify (brk)), "g" (__ptrvalue (addr)));
+ void *__unbounded newbrk;
+
+ newbrk = INLINE_SYSCALL (brk, 1, __ptrvalue (addr));
__curbrk = newbrk;
k_newact.sa_restorer = &restore;
}
- asm volatile ("pushl %%ebx\n\t"
- "movl %2, %%ebx\n\t"
- ENTER_KERNEL_STR "\n\t"
- "popl %%ebx"
- : "=a" (result)
- : "0" (SYS_ify (sigaction)), "mr" (sig),
- "c" (act ? __ptrvalue (&k_newact) : 0),
- "d" (oact ? __ptrvalue (&k_oldact) : 0));
+ result = INTERNAL_SYCALL (sigaction, 3, sig,
+ act ? __ptrvalue (&k_newact) : 0,
+ oact ? __ptrvalue (&k_oldact) : 0);
if (result < 0)
{
projects / thirdparty / glibc.git / commitdiff
