mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-23 17:53:37 +08:00
Update.
2002-12-19 Ulrich Drepper <drepper@redhat.com> * sysdeps/unix/sysv/linux/i386/sysdep.h: Add support to use AT_SYSINFO information for system calls. * sysdeps/generic/dl-sysdep.h: Define RTLD_PRIVATE_ERRNO to 1 only for ld.so. * elf/rtld.c (_dl_start) [USE___THREAD]: Define initdtv.
This commit is contained in:
Ulrich Drepper
parent
13880b3014
commit
5f5843e30d
10
ChangeLog
10
ChangeLog
@ -1,3 +1,13 @@
|
||||
2002-12-19 Ulrich Drepper <drepper@redhat.com>
|
||||
|
||||
* sysdeps/unix/sysv/linux/i386/sysdep.h: Add support to use AT_SYSINFO
|
||||
information for system calls.
|
||||
|
||||
* sysdeps/generic/dl-sysdep.h: Define RTLD_PRIVATE_ERRNO to 1 only
|
||||
for ld.so.
|
||||
|
||||
* elf/rtld.c (_dl_start) [USE___THREAD]: Define initdtv.
|
||||
|
||||
2002-12-19 Roland McGrath <roland@redhat.com>
|
||||
|
||||
* iconvdata/ibm856.h: Convert GCC extension initializer syntax to C99.
|
||||
|
||||
@ -37,6 +37,7 @@
|
||||
#include <unsecvars.h>
|
||||
#include <dl-cache.h>
|
||||
#include <dl-procinfo.h>
|
||||
#include <tls.h>
|
||||
|
||||
#include <assert.h>
|
||||
|
||||
@ -328,6 +329,7 @@ _dl_start (void *arg)
|
||||
to it. When we have something like GOTOFF relocs, we can use a plain
|
||||
reference to find the runtime address. Without that, we have to rely
|
||||
on the `l_addr' value, which is not the value we want when prelinked. */
|
||||
dtv_t initdtv[3];
|
||||
ElfW(Ehdr) *ehdr
|
||||
# ifdef DONT_USE_BOOTSTRAP_MAP
|
||||
= (ElfW(Ehdr) *) &_begin;
|
||||
|
||||
@ -1,5 +1,12 @@
|
||||
2002-12-19 Ulrich Drepper <drepper@redhat.com>
|
||||
|
||||
* allocatestack.c (allocate_stack) [NEED_DL_SYSINFO]: Set sysinfo
|
||||
in new TCB.
|
||||
* sysdeps/unix/sysv/linux/i386/createthread.c (create_thread): Check
|
||||
that sysinfo is properly initialized.
|
||||
* sysdeps/unix/sysv/linux/i386/dl-sysdep.h: Define RTLD_PRIVATE_ERRNO
|
||||
to 1 only for ld.so.
|
||||
|
||||
* sysdeps/unix/sysv/linux/i386/dl-sysdep.h: Define
|
||||
RTLD_CORRECT_DYNAMIC_WEAK.
|
||||
|
||||
|
||||
@ -108,6 +108,11 @@ create_thread (struct pthread *pd, STACK_VARIABLES_PARMS)
|
||||
}
|
||||
}
|
||||
|
||||
#ifdef NEED_DL_SYSINFO
|
||||
assert (THREAD_GETMEM (THREAD_SELF, header.data.sysinfo)
|
||||
== pd->header.data.sysinfo);
|
||||
#endif
|
||||
|
||||
/* We rely heavily on various flags the CLONE function understands:
|
||||
|
||||
CLONE_VM, CLONE_FS, CLONE_FILES
|
||||
|
||||
@ -28,7 +28,11 @@
|
||||
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
|
||||
#ifdef IS_IN_rtld
|
||||
# define RTLD_PRIVATE_ERRNO 1
|
||||
#else
|
||||
# define RTLD_PRIVATE_ERRNO 0
|
||||
#endif
|
||||
|
||||
/* This configuration has in libc.so cancellable functions and other
|
||||
functions which have to behave differently if the application uses
|
||||
|
||||
@ -25,4 +25,8 @@
|
||||
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
|
||||
#ifdef IS_IN_rtld
|
||||
# define RTLD_PRIVATE_ERRNO 1
|
||||
#else
|
||||
# define RTLD_PRIVATE_ERRNO 0
|
||||
#endif
|
||||
|
||||
@ -24,14 +24,11 @@
|
||||
#include <sysdeps/unix/i386/sysdep.h>
|
||||
#include <bp-sym.h>
|
||||
#include <bp-asm.h>
|
||||
/* Defines RTLD_PRIVATE_ERRNO and NEED_DL_SYSINFO. */
|
||||
#include <dl-sysdep.h>
|
||||
#include <tls.h>
|
||||
|
||||
|
||||
#ifdef IS_IN_rtld
|
||||
# include <dl-sysdep.h> /* Defines RTLD_PRIVATE_ERRNO. */
|
||||
#endif
|
||||
|
||||
|
||||
/* For Linux we can use the system call table in the header file
|
||||
/usr/include/asm/unistd.h
|
||||
of the kernel. But these symbols do not follow the SYS_* syntax
|
||||
@ -39,6 +36,12 @@
|
||||
#undef SYS_ify
|
||||
#define SYS_ify(syscall_name) __NR_##syscall_name
|
||||
|
||||
#if defined NEED_DL_SYSINFO && !defined IS_IN_rtld
|
||||
# define I386_USE_SYSENTER 1
|
||||
#else
|
||||
# undef I386_USE_SYSENTER
|
||||
#endif
|
||||
|
||||
#ifdef __ASSEMBLER__
|
||||
|
||||
/* Linux uses a negative return value to indicate syscall errors,
|
||||
@ -162,7 +165,15 @@ __i686.get_pc_thunk.reg: \
|
||||
|
||||
/* The original calling convention for system calls on Linux/i386 is
|
||||
to use int $0x80. */
|
||||
#define ENTER_KERNEL int $0x80
|
||||
#ifdef I386_USE_SYSENTER
|
||||
# ifdef SHARED
|
||||
# define ENTER_KERNEL call *%gs:SYSINFO_OFFSET
|
||||
# else
|
||||
# define ENTER_KERNEL call *_dl_sysinfo
|
||||
# endif
|
||||
#else
|
||||
# define ENTER_KERNEL int $0x80
|
||||
#endif
|
||||
|
||||
/* Linux takes system call arguments in registers:
|
||||
|
||||
@ -260,10 +271,6 @@ __i686.get_pc_thunk.reg: \
|
||||
|
||||
#else /* !__ASSEMBLER__ */
|
||||
|
||||
/* The original calling convention for system calls on Linux/i386 is
|
||||
to use int $0x80. */
|
||||
#define ENTER_KERNEL "int $0x80"
|
||||
|
||||
/* We need some help from the assembler to generate optimal code. We
|
||||
define some macros here which later will be used. */
|
||||
asm (".L__X'%ebx = 1\n\t"
|
||||
@ -318,17 +325,46 @@ asm (".L__X'%ebx = 1\n\t"
|
||||
normally. It will never touch errno. This returns just what the kernel
|
||||
gave back. */
|
||||
#undef INTERNAL_SYSCALL
|
||||
#define INTERNAL_SYSCALL(name, nr, args...) \
|
||||
#ifdef I386_USE_SYSENTER
|
||||
# ifdef SHARED
|
||||
# define INTERNAL_SYSCALL(name, nr, args...) \
|
||||
({ \
|
||||
unsigned int resultvar; \
|
||||
asm volatile ( \
|
||||
LOADARGS_##nr \
|
||||
"movl %1, %%eax\n\t" \
|
||||
ENTER_KERNEL "\n\t" \
|
||||
"call *%%gs:%P2\n\t" \
|
||||
RESTOREARGS_##nr \
|
||||
: "=a" (resultvar) \
|
||||
: "i" (__NR_##name), "i" (offsetof (tcbhead_t, sysinfo)) \
|
||||
ASMFMT_##nr(args) : "memory", "cc"); \
|
||||
(int) resultvar; })
|
||||
# else
|
||||
# define INTERNAL_SYSCALL(name, nr, args...) \
|
||||
({ \
|
||||
unsigned int resultvar; \
|
||||
asm volatile ( \
|
||||
LOADARGS_##nr \
|
||||
"movl %1, %%eax\n\t" \
|
||||
"call *_dl_sysinfo\n\t" \
|
||||
RESTOREARGS_##nr \
|
||||
: "=a" (resultvar) \
|
||||
: "i" (__NR_##name) ASMFMT_##nr(args) : "memory", "cc"); \
|
||||
(int) resultvar; })
|
||||
# endif
|
||||
#else
|
||||
# define INTERNAL_SYSCALL(name, nr, args...) \
|
||||
({ \
|
||||
unsigned int resultvar; \
|
||||
asm volatile ( \
|
||||
LOADARGS_##nr \
|
||||
"movl %1, %%eax\n\t" \
|
||||
"int $0x80\n\t" \
|
||||
RESTOREARGS_##nr \
|
||||
: "=a" (resultvar) \
|
||||
: "i" (__NR_##name) ASMFMT_##nr(args) : "memory", "cc"); \
|
||||
(int) resultvar; })
|
||||
#endif
|
||||
|
||||
#undef INTERNAL_SYSCALL_ERROR_P
|
||||
#define INTERNAL_SYSCALL_ERROR_P(val) ((unsigned int) (val) >= 0xfffff001u)
|
||||
@ -337,17 +373,28 @@ asm (".L__X'%ebx = 1\n\t"
|
||||
#define INTERNAL_SYSCALL_ERRNO(val) (-(val))
|
||||
|
||||
#define LOADARGS_0
|
||||
#define LOADARGS_1 \
|
||||
#if defined I386_USE_SYSENTER && defined SHARED
|
||||
# define LOADARGS_1 \
|
||||
"bpushl .L__X'%k3, %k3\n\t" \
|
||||
"bmovl .L__X'%k3, %k3\n\t"
|
||||
#else
|
||||
# define LOADARGS_1 \
|
||||
"bpushl .L__X'%k2, %k2\n\t" \
|
||||
"bmovl .L__X'%k2, %k2\n\t"
|
||||
#endif
|
||||
#define LOADARGS_2 LOADARGS_1
|
||||
#define LOADARGS_3 LOADARGS_1
|
||||
#define LOADARGS_4 LOADARGS_1
|
||||
#define LOADARGS_5 LOADARGS_1
|
||||
|
||||
#define RESTOREARGS_0
|
||||
#define RESTOREARGS_1 \
|
||||
#if defined I386_USE_SYSENTER && defined SHARED
|
||||
# define RESTOREARGS_1 \
|
||||
"bpopl .L__X'%k3, %k3\n\t"
|
||||
#else
|
||||
# define RESTOREARGS_1 \
|
||||
"bpopl .L__X'%k2, %k2\n\t"
|
||||
#endif
|
||||
#define RESTOREARGS_2 RESTOREARGS_1
|
||||
#define RESTOREARGS_3 RESTOREARGS_1
|
||||
#define RESTOREARGS_4 RESTOREARGS_1
|
||||
|
||||
Loading…
Reference in New Issue
Block a user