diff options
author | H.J. Lu <hjl.tools@gmail.com> | 2015-10-13 11:58:53 -0700 |
---|---|---|
committer | H.J. Lu <hjl.tools@gmail.com> | 2015-10-13 11:59:15 -0700 |
commit | fb1cf108115f7e2e4510859693431b3473657d77 (patch) | |
tree | 5c1579a854a37ac677b5647273ce5fccba600e4a /sysdeps/unix | |
parent | 0a5768fe9c2e2870269c3a0920f88d9c22d73e33 (diff) | |
download | glibc-fb1cf108115f7e2e4510859693431b3473657d77.zip glibc-fb1cf108115f7e2e4510859693431b3473657d77.tar.gz glibc-fb1cf108115f7e2e4510859693431b3473657d77.tar.bz2 |
Add INLINE_SYSCALL_ERROR_RETURN_VALUE
For ia32 PIC, the first thing of many syscalls does is to call
__x86.get_pc_thunk.reg to load PC into reg in case there is an error,
which is required for setting errno. In most cases, there are no
errors. But we still call __x86.get_pc_thunk.reg. This patch adds
INLINE_SYSCALL_ERROR_RETURN_VALUE so that i386 can optimize setting
errno by branching to the internal __syscall_error without PLT.
With i386 INLINE_SYSCALL_ERROR_RETURN_VALUE and i386 syscall inlining
optimization for GCC 5, for sysdeps/unix/sysv/linux/fchmodat.c with
-O2 -march=i686 -mtune=generic, GCC 5.2 now generates:
<fchmodat>:
0: push %ebx
1: mov 0x14(%esp),%eax
5: mov 0x8(%esp),%ebx
9: mov 0xc(%esp),%ecx
d: mov 0x10(%esp),%edx
11: test $0xfffffeff,%eax
16: jne 38 <fchmodat+0x38>
18: test $0x1,%ah
1b: jne 48 <fchmodat+0x48>
1d: mov $0x132,%eax
22: call *%gs:0x10
29: cmp $0xfffff000,%eax
2e: ja 58 <fchmodat+0x58>
30: pop %ebx
31: ret
32: lea 0x0(%esi),%esi
38: pop %ebx
39: mov $0xffffffea,%eax
3e: jmp 3f <fchmodat+0x3f> 3f: R_386_PC32 __syscall_error
43: nop
44: lea 0x0(%esi,%eiz,1),%esi
48: pop %ebx
49: mov $0xffffffa1,%eax
4e: jmp 4f <fchmodat+0x4f> 4f: R_386_PC32 __syscall_error
53: nop
54: lea 0x0(%esi,%eiz,1),%esi
58: pop %ebx
59: jmp 5a <fchmodat+0x5a> 5a: R_386_PC32 __syscall_error
instead of
<fchmodat>:
0: sub $0x8,%esp
3: mov 0x18(%esp),%eax
7: mov %ebx,(%esp)
a: call b <fchmodat+0xb> b: R_386_PC32 __x86.get_pc_thunk.bx
f: add $0x2,%ebx 11: R_386_GOTPC _GLOBAL_OFFSET_TABLE_
15: mov %edi,0x4(%esp)
19: test $0xfffffeff,%eax
1e: jne 70 <fchmodat+0x70>
20: test $0x1,%ah
23: jne 88 <fchmodat+0x88>
25: mov 0x14(%esp),%edx
29: mov 0x10(%esp),%ecx
2d: mov 0xc(%esp),%edi
31: xchg %ebx,%edi
33: mov $0x132,%eax
38: call *%gs:0x10
3f: xchg %edi,%ebx
41: cmp $0xfffff000,%eax
46: ja 58 <fchmodat+0x58>
48: mov (%esp),%ebx
4b: mov 0x4(%esp),%edi
4f: add $0x8,%esp
52: ret
53: nop
54: lea 0x0(%esi,%eiz,1),%esi
58: mov 0x0(%ebx),%edx 5a: R_386_TLS_GOTIE __libc_errno
5e: neg %eax
60: mov %eax,%gs:(%edx)
63: mov $0xffffffff,%eax
68: jmp 48 <fchmodat+0x48>
6a: lea 0x0(%esi),%esi
70: mov 0x0(%ebx),%eax 72: R_386_TLS_GOTIE __libc_errno
76: movl $0x16,%gs:(%eax)
7d: mov $0xffffffff,%eax
82: jmp 48 <fchmodat+0x48>
84: lea 0x0(%esi,%eiz,1),%esi
88: mov 0x0(%ebx),%eax 8a: R_386_TLS_GOTIE __libc_errno
8e: movl $0x5f,%gs:(%eax)
95: mov $0xffffffff,%eax
9a: jmp 48 <fchmodat+0x48>
* sysdeps/unix/sysv/linux/sysdep.h: New file.
* sysdeps/unix/sysv/linux/i386/sysdep.c: Likewise.
* sysdeps/unix/sysv/linux/alpha/sysdep.h: Include
<sysdeps/unix/sysv/linux/sysdep.h>.
* sysdeps/unix/sysv/linux/arm/sysdep.h: Likewise.
* sysdeps/unix/sysv/linux/generic/sysdep.h: Likewise.
* sysdeps/unix/sysv/linux/hppa/sysdep.h: Likewise.
* sysdeps/unix/sysv/linux/ia64/sysdep.h: Likewise.
* sysdeps/unix/sysv/linux/m68k/sysdep.h: Likewise.
* sysdeps/unix/sysv/linux/microblaze/sysdep.h: Likewise.
* sysdeps/unix/sysv/linux/mips/mips32/sysdep.h: Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/n32/sysdep.h: Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/n64/sysdep.h: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h: Likewise.
* sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h: Likewise.
* sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h: Likewise.
* sysdeps/unix/sysv/linux/sh/sysdep.h: Likewise.
* sysdeps/unix/sysv/linux/sparc/sysdep.h: Likewise.
* sysdeps/unix/sysv/linux/x86_64/sysdep.h: Likewise.
* sysdeps/unix/sysv/linux/i386/Makefile [$(subdir) == csu]
(sysdep-dl-routines): Add sysdep.
[$(subdir) == nptl] (libpthread-routines): Likewise.
[$(subdir) == rt] (librt-routines): Likewise.
* sysdeps/unix/sysv/linux/i386/clone.S (__clone): Don't check
PIC when branching to SYSCALL_ERROR_LABEL.
* sysdeps/unix/sysv/linux/i386/sysdep.S: Removed.
* sysdeps/unix/sysv/linux/i386/sysdep.h: Include
<sysdeps/unix/sysv/linux/sysdep.h>.
(SYSCALL_ERROR_LABEL): Changed to __syscall_error.
(SYSCALL_ERROR_ERRNO): Removed.
(SYSCALL_ERROR_HANDLER): Changed to empty.
(SYSCALL_ERROR_HANDLER_TLS_STORE): Likewise.
(__syscall_error): New prototype.
[IS_IN (libc)] (INLINE_SYSCALL): New macro.
(INLINE_SYSCALL_ERROR_RETURN_VALUE): Likewise.
Diffstat (limited to 'sysdeps/unix')
22 files changed, 91 insertions, 85 deletions
diff --git a/sysdeps/unix/sysv/linux/alpha/sysdep.h b/sysdeps/unix/sysv/linux/alpha/sysdep.h index a95b113..aea77b4 100644 --- a/sysdeps/unix/sysv/linux/alpha/sysdep.h +++ b/sysdeps/unix/sysv/linux/alpha/sysdep.h @@ -25,6 +25,7 @@ #endif /* There is some commonality. */ +#include <sysdeps/unix/sysv/linux/sysdep.h> #include <sysdeps/unix/alpha/sysdep.h> #include <tls.h> diff --git a/sysdeps/unix/sysv/linux/arm/sysdep.h b/sysdeps/unix/sysv/linux/arm/sysdep.h index 200f77a..c8715f7 100644 --- a/sysdeps/unix/sysv/linux/arm/sysdep.h +++ b/sysdeps/unix/sysv/linux/arm/sysdep.h @@ -21,6 +21,7 @@ #define _LINUX_ARM_SYSDEP_H 1 /* There is some commonality. */ +#include <sysdeps/unix/sysv/linux/sysdep.h> #include <sysdeps/unix/arm/sysdep.h> /* Defines RTLD_PRIVATE_ERRNO and USE_DL_SYSINFO. */ diff --git a/sysdeps/unix/sysv/linux/generic/sysdep.h b/sysdeps/unix/sysv/linux/generic/sysdep.h index 11da9d2..70e7158 100644 --- a/sysdeps/unix/sysv/linux/generic/sysdep.h +++ b/sysdeps/unix/sysv/linux/generic/sysdep.h @@ -19,6 +19,7 @@ #include <bits/wordsize.h> #include <kernel-features.h> #include <sysdeps/unix/sysdep.h> +#include <sysdeps/unix/sysv/linux/sysdep.h> /* Provide the common name to allow more code reuse. */ #define __NR__llseek __NR_llseek diff --git a/sysdeps/unix/sysv/linux/hppa/sysdep.h b/sysdeps/unix/sysv/linux/hppa/sysdep.h index cb1f163..2cae70f 100644 --- a/sysdeps/unix/sysv/linux/hppa/sysdep.h +++ b/sysdeps/unix/sysv/linux/hppa/sysdep.h @@ -22,6 +22,7 @@ #define _LINUX_HPPA_SYSDEP_H 1 #include <sysdeps/unix/sysdep.h> +#include <sysdeps/unix/sysv/linux/sysdep.h> #include <sysdeps/hppa/sysdep.h> /* Defines RTLD_PRIVATE_ERRNO. */ diff --git a/sysdeps/unix/sysv/linux/i386/Makefile b/sysdeps/unix/sysv/linux/i386/Makefile index 80da593..e10d133 100644 --- a/sysdeps/unix/sysv/linux/i386/Makefile +++ b/sysdeps/unix/sysv/linux/i386/Makefile @@ -27,3 +27,17 @@ endif ifeq ($(subdir),stdlib) gen-as-const-headers += ucontext_i.sym endif + +ifeq ($(subdir),csu) +sysdep-dl-routines += sysdep +endif + +ifeq ($(subdir),nptl) +# pull in __syscall_error routine +libpthread-routines += sysdep +endif + +ifeq ($(subdir),rt) +# pull in __syscall_error routine +librt-routines += sysdep +endif diff --git a/sysdeps/unix/sysv/linux/i386/clone.S b/sysdeps/unix/sysv/linux/i386/clone.S index 243dbfe..2aafb3a 100644 --- a/sysdeps/unix/sysv/linux/i386/clone.S +++ b/sysdeps/unix/sysv/linux/i386/clone.S @@ -47,19 +47,11 @@ ENTRY (__clone) /* Sanity check arguments. */ movl $-EINVAL,%eax movl FUNC(%esp),%ecx /* no NULL function pointers */ -#ifdef PIC - jecxz SYSCALL_ERROR_LABEL -#else testl %ecx,%ecx jz SYSCALL_ERROR_LABEL -#endif movl STACK(%esp),%ecx /* no NULL stack pointers */ -#ifdef PIC - jecxz SYSCALL_ERROR_LABEL -#else testl %ecx,%ecx jz SYSCALL_ERROR_LABEL -#endif /* Insert the argument onto the new stack. Make sure the new thread is started with an alignment of (mod 16). */ diff --git a/sysdeps/unix/sysv/linux/i386/sysdep.S b/sysdeps/unix/sysv/linux/i386/sysdep.c index 4e6c262..141105e 100644 --- a/sysdeps/unix/sysv/linux/i386/sysdep.S +++ b/sysdeps/unix/sysv/linux/i386/sysdep.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1995-2015 Free Software Foundation, Inc. +/* Copyright (C) 2015 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 @@ -15,26 +15,16 @@ License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ +#include <errno.h> #include <sysdep.h> -/* The following code is only used in the shared library when we - compile the reentrant version. Otherwise each system call defines - each own version. */ - -#ifndef PIC - -/* The syscall stubs jump here when they detect an error. - The code for Linux is almost identical to the canonical Unix/i386 - code, except that the error number in %eax is negated. */ - -#undef CALL_MCOUNT -#define CALL_MCOUNT /* Don't insert the profiling call, it clobbers %eax. */ - - .text -ENTRY (__syscall_error) - negl %eax - -#define __syscall_error __syscall_error_1 -#include <sysdeps/unix/i386/sysdep.S> - -#endif /* !PIC */ +/* This routine is jumped to by all the syscall handlers, to stash + an error number into errno. ERROR is the negative error number + returned from the x86 kernel. */ +int +__attribute__ ((__regparm__ (1))) +__syscall_error (int error) +{ + __set_errno (-error); + return -1; +} diff --git a/sysdeps/unix/sysv/linux/i386/sysdep.h b/sysdeps/unix/sysv/linux/i386/sysdep.h index d76aca5..3cf927a 100644 --- a/sysdeps/unix/sysv/linux/i386/sysdep.h +++ b/sysdeps/unix/sysv/linux/i386/sysdep.h @@ -20,6 +20,7 @@ #define _LINUX_I386_SYSDEP_H 1 /* There is some commonality. */ +#include <sysdeps/unix/sysv/linux/sysdep.h> #include <sysdeps/unix/i386/sysdep.h> /* Defines RTLD_PRIVATE_ERRNO and USE_DL_SYSINFO. */ #include <dl-sysdep.h> @@ -55,11 +56,7 @@ /* We don't want the label for the error handle to be global when we define it here. */ -#ifdef PIC -# define SYSCALL_ERROR_LABEL 0f -#else -# define SYSCALL_ERROR_LABEL syscall_error -#endif +#define SYSCALL_ERROR_LABEL __syscall_error #undef PSEUDO #define PSEUDO(name, syscall_name, args) \ @@ -100,55 +97,7 @@ #define ret_ERRVAL ret -#ifndef PIC -# define SYSCALL_ERROR_HANDLER /* Nothing here; code in sysdep.S is used. */ -#else - -# if RTLD_PRIVATE_ERRNO -# define SYSCALL_ERROR_HANDLER \ -0:SETUP_PIC_REG(cx); \ - addl $_GLOBAL_OFFSET_TABLE_, %ecx; \ - negl %eax; \ - movl %eax, rtld_errno@GOTOFF(%ecx); \ - orl $-1, %eax; \ - ret; - -# elif defined _LIBC_REENTRANT - -# if IS_IN (libc) -# define SYSCALL_ERROR_ERRNO __libc_errno -# else -# define SYSCALL_ERROR_ERRNO errno -# endif -# define SYSCALL_ERROR_HANDLER \ -0:SETUP_PIC_REG (cx); \ - addl $_GLOBAL_OFFSET_TABLE_, %ecx; \ - movl SYSCALL_ERROR_ERRNO@GOTNTPOFF(%ecx), %ecx; \ - negl %eax; \ - SYSCALL_ERROR_HANDLER_TLS_STORE (%eax, %ecx); \ - orl $-1, %eax; \ - ret; -# ifndef NO_TLS_DIRECT_SEG_REFS -# define SYSCALL_ERROR_HANDLER_TLS_STORE(src, destoff) \ - movl src, %gs:(destoff) -# else -# define SYSCALL_ERROR_HANDLER_TLS_STORE(src, destoff) \ - addl %gs:0, destoff; \ - movl src, (destoff) -# endif -# else -/* Store (- %eax) into errno through the GOT. */ -# define SYSCALL_ERROR_HANDLER \ -0:SETUP_PIC_REG(cx); \ - addl $_GLOBAL_OFFSET_TABLE_, %ecx; \ - negl %eax; \ - movl errno@GOT(%ecx), %ecx; \ - movl %eax, (%ecx); \ - orl $-1, %eax; \ - ret; -# endif /* _LIBC_REENTRANT */ -#endif /* PIC */ - +#define SYSCALL_ERROR_HANDLER /* Nothing here; code in sysdep.c is used. */ /* The original calling convention for system calls on Linux/i386 is to use int $0x80. */ @@ -275,6 +224,9 @@ #else /* !__ASSEMBLER__ */ +extern int __syscall_error (int) + attribute_hidden __attribute__ ((__regparm__ (1))); + /* 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" @@ -318,7 +270,15 @@ struct libc_do_syscall_args /* Define a macro which expands inline into the wrapper code for a system call. */ #undef INLINE_SYSCALL -#define INLINE_SYSCALL(name, nr, args...) \ +#if IS_IN (libc) +# define INLINE_SYSCALL(name, nr, args...) \ + ({ \ + unsigned int resultvar = INTERNAL_SYSCALL (name, , nr, args); \ + __glibc_unlikely (INTERNAL_SYSCALL_ERROR_P (resultvar, )) \ + ? __syscall_error (-INTERNAL_SYSCALL_ERRNO (resultvar, )) \ + : (int) resultvar; }) +#else +# define INLINE_SYSCALL(name, nr, args...) \ ({ \ unsigned int resultvar = INTERNAL_SYSCALL (name, , nr, args); \ if (__glibc_unlikely (INTERNAL_SYSCALL_ERROR_P (resultvar, ))) \ @@ -327,6 +287,14 @@ struct libc_do_syscall_args resultvar = 0xffffffff; \ } \ (int) resultvar; }) +#endif + +/* Set error number and return -1. Return the internal function, + __syscall_error, which sets errno from the negative error number + and returns -1, to avoid PIC. */ +#undef INLINE_SYSCALL_ERROR_RETURN_VALUE +#define INLINE_SYSCALL_ERROR_RETURN_VALUE(resultvar) \ + __syscall_error (-(resultvar)) /* List of system calls which are supported as vsyscalls. */ # define HAVE_CLOCK_GETTIME_VSYSCALL 1 diff --git a/sysdeps/unix/sysv/linux/ia64/sysdep.h b/sysdeps/unix/sysv/linux/ia64/sysdep.h index 03efae9..eafcc7a 100644 --- a/sysdeps/unix/sysv/linux/ia64/sysdep.h +++ b/sysdeps/unix/sysv/linux/ia64/sysdep.h @@ -21,6 +21,7 @@ #define _LINUX_IA64_SYSDEP_H 1 #include <sysdeps/unix/sysdep.h> +#include <sysdeps/unix/sysv/linux/sysdep.h> #include <sysdeps/ia64/sysdep.h> #include <dl-sysdep.h> #include <tls.h> diff --git a/sysdeps/unix/sysv/linux/m68k/sysdep.h b/sysdeps/unix/sysv/linux/m68k/sysdep.h index 2b88add..e55446c 100644 --- a/sysdeps/unix/sysv/linux/m68k/sysdep.h +++ b/sysdeps/unix/sysv/linux/m68k/sysdep.h @@ -17,6 +17,7 @@ License along with the GNU C Library. If not, see <http://www.gnu.org/licenses/>. */ +#include <sysdeps/unix/sysv/linux/sysdep.h> #include <tls.h> /* Defines RTLD_PRIVATE_ERRNO. */ diff --git a/sysdeps/unix/sysv/linux/microblaze/sysdep.h b/sysdeps/unix/sysv/linux/microblaze/sysdep.h index 9d5c542..75dd11f 100644 --- a/sysdeps/unix/sysv/linux/microblaze/sysdep.h +++ b/sysdeps/unix/sysv/linux/microblaze/sysdep.h @@ -20,6 +20,7 @@ #define _LINUX_MICROBLAZE_SYSDEP_H 1 #include <sysdeps/unix/sysdep.h> +#include <sysdeps/unix/sysv/linux/sysdep.h> #include <sysdeps/microblaze/sysdep.h> /* Defines RTLD_PRIVATE_ERRNO. */ diff --git a/sysdeps/unix/sysv/linux/mips/mips32/sysdep.h b/sysdeps/unix/sysv/linux/mips/mips32/sysdep.h index a2aa38d..cb8f4a8 100644 --- a/sysdeps/unix/sysv/linux/mips/mips32/sysdep.h +++ b/sysdeps/unix/sysv/linux/mips/mips32/sysdep.h @@ -19,6 +19,7 @@ #define _LINUX_MIPS_MIPS32_SYSDEP_H 1 /* There is some commonality. */ +#include <sysdeps/unix/sysv/linux/sysdep.h> #include <sysdeps/unix/mips/mips32/sysdep.h> #include <tls.h> diff --git a/sysdeps/unix/sysv/linux/mips/mips64/n32/sysdep.h b/sysdeps/unix/sysv/linux/mips/mips64/n32/sysdep.h index 4c28af6..b97bf0b 100644 --- a/sysdeps/unix/sysv/linux/mips/mips64/n32/sysdep.h +++ b/sysdeps/unix/sysv/linux/mips/mips64/n32/sysdep.h @@ -19,6 +19,7 @@ #define _LINUX_MIPS_SYSDEP_H 1 /* There is some commonality. */ +#include <sysdeps/unix/sysv/linux/sysdep.h> #include <sysdeps/unix/mips/mips64/n32/sysdep.h> #include <tls.h> diff --git a/sysdeps/unix/sysv/linux/mips/mips64/n64/sysdep.h b/sysdeps/unix/sysv/linux/mips/mips64/n64/sysdep.h index 1fc038c..6bbeeb0 100644 --- a/sysdeps/unix/sysv/linux/mips/mips64/n64/sysdep.h +++ b/sysdeps/unix/sysv/linux/mips/mips64/n64/sysdep.h @@ -19,6 +19,7 @@ #define _LINUX_MIPS_SYSDEP_H 1 /* There is some commonality. */ +#include <sysdeps/unix/sysv/linux/sysdep.h> #include <sysdeps/unix/mips/mips64/n64/sysdep.h> #include <tls.h> diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h b/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h index dc56bea..7f389e4 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h @@ -18,6 +18,7 @@ #ifndef _LINUX_POWERPC_SYSDEP_H #define _LINUX_POWERPC_SYSDEP_H 1 +#include <sysdeps/unix/sysv/linux/sysdep.h> #include <sysdeps/unix/powerpc/sysdep.h> #include <tls.h> diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h b/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h index e2014cc..6803cce 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h @@ -20,6 +20,7 @@ #ifndef _LINUX_POWERPC_SYSDEP_H #define _LINUX_POWERPC_SYSDEP_H 1 +#include <sysdeps/unix/sysv/linux/sysdep.h> #include <sysdeps/unix/powerpc/sysdep.h> #include <tls.h> diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h b/sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h index c768df1..d29b685 100644 --- a/sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h +++ b/sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h @@ -21,6 +21,7 @@ #include <sysdeps/s390/s390-32/sysdep.h> #include <sysdeps/unix/sysdep.h> +#include <sysdeps/unix/sysv/linux/sysdep.h> #include <dl-sysdep.h> /* For RTLD_PRIVATE_ERRNO. */ #include <tls.h> diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h b/sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h index c041153..a373207 100644 --- a/sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h +++ b/sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h @@ -22,6 +22,7 @@ #include <sysdeps/s390/s390-64/sysdep.h> #include <sysdeps/unix/sysdep.h> +#include <sysdeps/unix/sysv/linux/sysdep.h> #include <dl-sysdep.h> /* For RTLD_PRIVATE_ERRNO. */ #include <tls.h> diff --git a/sysdeps/unix/sysv/linux/sh/sysdep.h b/sysdeps/unix/sysv/linux/sh/sysdep.h index 5226ff6..ab5b2c3 100644 --- a/sysdeps/unix/sysv/linux/sh/sysdep.h +++ b/sysdeps/unix/sysv/linux/sh/sysdep.h @@ -21,6 +21,7 @@ #define _LINUX_SH_SYSDEP_H 1 /* There is some commonality. */ +#include <sysdeps/unix/sysv/linux/sysdep.h> #include <sysdeps/unix/sh/sysdep.h> #include <tls.h> diff --git a/sysdeps/unix/sysv/linux/sparc/sysdep.h b/sysdeps/unix/sysv/linux/sparc/sysdep.h index e215dbb..c9843de 100644 --- a/sysdeps/unix/sysv/linux/sparc/sysdep.h +++ b/sysdeps/unix/sysv/linux/sparc/sysdep.h @@ -20,6 +20,7 @@ #define _LINUX_SPARC_SYSDEP_H 1 #include <sysdeps/unix/sysdep.h> +#include <sysdeps/unix/sysv/linux/sysdep.h> #include <sysdeps/sparc/sysdep.h> #ifdef __ASSEMBLER__ diff --git a/sysdeps/unix/sysv/linux/sysdep.h b/sysdeps/unix/sysv/linux/sysdep.h new file mode 100644 index 0000000..a7dd887 --- /dev/null +++ b/sysdeps/unix/sysv/linux/sysdep.h @@ -0,0 +1,25 @@ +/* Copyright (C) 2015 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/>. */ + +/* Set error number and return -1. A target may choose to return the + internal function, __syscall_error, which sets errno and returns -1. + We use -1l, instead of -1, so that it can be casted to (void *). */ +#define INLINE_SYSCALL_ERROR_RETURN_VALUE(err) \ + ({ \ + __set_errno (err); \ + -1l; \ + }) diff --git a/sysdeps/unix/sysv/linux/x86_64/sysdep.h b/sysdeps/unix/sysv/linux/x86_64/sysdep.h index 5a62cce..fc132f6 100644 --- a/sysdeps/unix/sysv/linux/x86_64/sysdep.h +++ b/sysdeps/unix/sysv/linux/x86_64/sysdep.h @@ -19,6 +19,7 @@ #define _LINUX_X86_64_SYSDEP_H 1 /* There is some commonality. */ +#include <sysdeps/unix/sysv/linux/sysdep.h> #include <sysdeps/unix/x86_64/sysdep.h> #include <tls.h> |