/* Copyright (c) 2005-2007, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* ---
* Author: Markus Gutschke
*/
/* This file includes Linux-specific support functions common to the
* coredumper and the thread lister; primarily, this is a collection
* of direct system calls, and a couple of symbols missing from
* standard header files.
* There are a few options that the including file can set to control
* the behavior of this file:
*
* SYS_CPLUSPLUS:
* The entire header file will normally be wrapped in 'extern "C" { }",
* making it suitable for compilation as both C and C++ source. If you
* do not want to do this, you can set the SYS_CPLUSPLUS macro to inhibit
* the wrapping. N.B. doing so will suppress inclusion of all prerequisite
* system header files, too. It is the caller's responsibility to provide
* the necessary definitions.
*
* SYS_ERRNO:
* All system calls will update "errno" unless overriden by setting the
* SYS_ERRNO macro prior to including this file. SYS_ERRNO should be
* an l-value.
*
* SYS_INLINE:
* New symbols will be defined "static inline", unless overridden by
* the SYS_INLINE macro.
*
* SYS_LINUX_SYSCALL_SUPPORT_H
* This macro is used to avoid multiple inclusions of this header file.
* If you need to include this file more than once, make sure to
* unset SYS_LINUX_SYSCALL_SUPPORT_H before each inclusion.
*
* SYS_PREFIX:
* New system calls will have a prefix of "sys_" unless overridden by
* the SYS_PREFIX macro. Valid values for this macro are [0..9] which
* results in prefixes "sys[0..9]_". It is also possible to set this
* macro to -1, which avoids all prefixes.
*
* This file defines a few internal symbols that all start with "LSS_".
* Do not access these symbols from outside this file. They are not part
* of the supported API.
*/
#ifndef SYS_LINUX_SYSCALL_SUPPORT_H
#define SYS_LINUX_SYSCALL_SUPPORT_H
/* We currently only support x86-32, x86-64, ARM, and MIPS on Linux.
* Porting to other related platforms should not be difficult.
*/
#if (defined(__i386__) || defined(__x86_64__) || defined(__ARM_ARCH_3__) || \
defined(mips)) && defined(__linux)
#ifndef SYS_CPLUSPLUS
#ifdef __cplusplus
/* Some system header files in older versions of gcc neglect to properly
* handle being included from C++. As it appears to be harmless to have
* multiple nested 'extern "C"' blocks, just add another one here.
*/
extern "C" {
#endif
#include <errno.h>
#include <signal.h>
#include <stdarg.h>
#include <sys/ptrace.h>
#include <sys/resource.h>
#include <sys/time.h>
#include <sys/types.h>
#include <syscall.h>
#include <unistd.h>
#include <linux/unistd.h>
#include <endian.h>
/* libc defines versions of stat, dirent, dirent64, and statfs64 that are
* incompatible with the structures that the kernel API expects. If you wish
* to use sys_fstat(), sys_stat(), sys_getdents(), sys_getdents64(),
* sys_statfs64(), or sys_statfs() you will need to include the kernel
* headers in your code.
*
* asm/posix_types.h
* asm/stat.h
* asm/statfs.h
* asm/types.h
* linux/dirent.h
*/
struct dirent64;
struct dirent;
struct iovec;
struct msghdr;
struct pollfd;
struct rlimit;
struct sockaddr;
struct stat;
struct stat64;
struct statfs;
struct statfs64;
#endif
/* Definitions missing from the standard header files */
#ifndef O_DIRECTORY
#if defined(__ARM_ARCH_3__)
#define O_DIRECTORY 0040000
#else
#define O_DIRECTORY 0200000
#endif
#endif
#ifndef NT_PRXFPREG
#define NT_PRXFPREG 0x46e62b7f
#endif
#ifndef PTRACE_GETFPXREGS
#define PTRACE_GETFPXREGS ((enum __ptrace_request)18)
#endif
#ifndef PR_GET_DUMPABLE
#define PR_GET_DUMPABLE 3
#endif
#ifndef PR_SET_DUMPABLE
#define PR_SET_DUMPABLE 4
#endif
#ifndef AT_FDCWD
#define AT_FDCWD (-100)
#endif
#ifndef AT_SYMLINK_NOFOLLOW
#define AT_SYMLINK_NOFOLLOW 0x100
#endif
#ifndef AT_REMOVEDIR
#define AT_REMOVEDIR 0x200
#endif
#ifndef MREMAP_FIXED
#define MREMAP_FIXED 2
#endif
#if defined(__i386__)
#ifndef __NR_setresuid
#define __NR_setresuid 164
#define __NR_setresgid 170
#endif
#ifndef __NR_ugetrlimit
#define __NR_ugetrlimit 191
#endif
#ifndef __NR_setresuid32
#define __NR_setresuid32 208
#define __NR_setresgid32 210
#endif
#ifndef __NR_setfsuid32
#define __NR_setfsuid32 215
#define __NR_setfsgid32 216
#endif
#ifndef __NR_getdents64
#define __NR_getdents64 220
#endif
#ifndef __NR_gettid
#define __NR_gettid 224
#endif
#ifndef __NR_readahead
#define __NR_readahead 225
#endif
#ifndef __NR_setxattr
#define __NR_setxattr 226
#endif
#ifndef __NR_lsetxattr
#define __NR_lsetxattr 227
#endif
#ifndef __NR_getxattr
#define __NR_getxattr 229
#endif
#ifndef __NR_lgetxattr
#define __NR_lgetxattr 230
#endif
#ifndef __NR_futex
#define __NR_futex 240
#endif
#ifndef __NR_sched_setaffinity
#define __NR_sched_setaffinity 241
#define __NR_sched_getaffinity 242
#endif
#ifndef __NR_set_tid_address
#define __NR_set_tid_address 258
#endif
#ifndef __NR_statfs64
#define __NR_statfs64 268
#endif
#ifndef __NR_fstatfs64
#define __NR_fstatfs64 269
#endif
#ifndef __NR_fadvise64_64
#define __NR_fadvise64_64 272
#endif
#ifndef __NR_openat
#define __NR_openat 295
#endif
#ifndef __NR_fstatat64
#define __NR_fstatat64 300
#endif
#ifndef __NR_unlinkat
#define __NR_unlinkat 301
#endif
#ifndef __NR_move_pages
#define __NR_move_pages 317
#endif
/* End of i386 definitions */
#elif defined(__ARM_ARCH_3__)
#ifndef __NR_setresuid
#define __NR_setresuid (__NR_SYSCALL_BASE + 164)
#define __NR_setresgid (__NR_SYSCALL_BASE + 170)
#endif
#ifndef __NR_ugetrlimit
#define __NR_ugetrlimit (__NR_SYSCALL_BASE + 191)
#endif
#ifndef __NR_setresuid32
#define __NR_setresuid32 (__NR_SYSCALL_BASE + 208)
#define __NR_setresgid32 (__NR_SYSCALL_BASE + 210)
#endif
#ifndef __NR_setfsuid32
#define __NR_setfsuid32 (__NR_SYSCALL_BASE + 215)
#define __NR_setfsgid32 (__NR_SYSCALL_BASE + 216)
#endif
#ifndef __NR_getdents64
#define __NR_getdents64 (__NR_SYSCALL_BASE + 217)
#endif
#ifndef __NR_gettid
#define __NR_gettid (__NR_SYSCALL_BASE + 224)
#endif
#ifndef __NR_readahead
#define __NR_readahead (__NR_SYSCALL_BASE + 225)
#endif
#ifndef __NR_setxattr
#define __NR_setxattr (__NR_SYSCALL_BASE + 226)
#endif
#ifndef __NR_lsetxattr
#define __NR_lsetxattr (__NR_SYSCALL_BASE + 227)
#endif
#ifndef __NR_getxattr
#define __NR_getxattr (__NR_SYSCALL_BASE + 229)
#endif
#ifndef __NR_lgetxattr
#define __NR_lgetxattr (__NR_SYSCALL_BASE + 230)
#endif
#ifndef __NR_futex
#define __NR_futex (__NR_SYSCALL_BASE + 240)
#endif
#ifndef __NR_sched_setaffinity
#define __NR_sched_setaffinity (__NR_SYSCALL_BASE + 241)
#define __NR_sched_getaffinity (__NR_SYSCALL_BASE + 242)
#endif
#ifndef __NR_set_tid_address
#define __NR_set_tid_address (__NR_SYSCALL_BASE + 256)
#endif
#ifndef __NR_statfs64
#define __NR_statfs64 (__NR_SYSCALL_BASE + 266)
#endif
#ifndef __NR_fstatfs64
#define __NR_fstatfs64 (__NR_SYSCALL_BASE + 267)
#endif
#ifndef __NR_move_pages
#define __NR_move_pages (__NR_SYSCALL_BASE + 344)
#endif
/* End of ARM 3 definitions */
#elif defined(__x86_64__)
#ifndef __NR_setresuid
#define __NR_setresuid 117
#define __NR_setresgid 119
#endif
#ifndef __NR_gettid
#define __NR_gettid 186
#endif
#ifndef __NR_readahead
#define __NR_readahead 187
#endif
#ifndef __NR_setxattr
#define __NR_setxattr 188
#endif
#ifndef __NR_lsetxattr
#define __NR_lsetxattr 189
#endif
#ifndef __NR_getxattr
#define __NR_getxattr 191
#endif
#ifndef __NR_lgetxattr
#define __NR_lgetxattr 192
#endif
#ifndef __NR_futex
#define __NR_futex 202
#endif
#ifndef __NR_sched_setaffinity
#define __NR_sched_setaffinity 203
#define __NR_sched_getaffinity 204
#endif
#ifndef __NR_getdents64
#define __NR_getdents64 217
#endif
#ifndef __NR_set_tid_address
#define __NR_set_tid_address 218
#endif
#ifndef __NR_fadvise64
#define __NR_fadvise64 221
#endif
#ifndef __NR_openat
#define __NR_openat 257
#endif
#ifndef __NR_newfstatat
#define __NR_newfstatat 262
#endif
#ifndef __NR_unlinkat
#define __NR_unlinkat 263
#endif
#ifndef __NR_move_pages
#define __NR_move_pages 279
#endif
/* End of x86-64 definitions */
#elif defined(mips)
#if _MIPS_SIM == _MIPS_SIM_ABI32
#ifndef __NR_setresuid
#define __NR_setresuid (__NR_Linux + 185)
#define __NR_setresgid (__NR_Linux + 190)
#endif
#ifndef __NR_getdents64
#define __NR_getdents64 (__NR_Linux + 219)
#endif
#ifndef __NR_gettid
#define __NR_gettid (__NR_Linux + 222)
#endif
#ifndef __NR_readahead
#define __NR_readahead (__NR_Linux + 223)
#endif
#ifndef __NR_setxattr
#define __NR_setxattr (__NR_Linux + 224)
#endif
#ifndef __NR_lsetxattr
#define __NR_lsetxattr (__NR_Linux + 225)
#endif
#ifndef __NR_getxattr
#define __NR_getxattr (__NR_Linux + 227)
#endif
#ifndef __NR_lgetxattr
#define __NR_lgetxattr (__NR_Linux + 228)
#endif
#ifndef __NR_futex
#define __NR_futex (__NR_Linux + 238)
#endif
#ifndef __NR_sched_setaffinity
#define __NR_sched_setaffinity (__NR_Linux + 239)
#define __NR_sched_getaffinity (__NR_Linux + 240)
#endif
#ifndef __NR_set_tid_address
#define __NR_set_tid_address (__NR_Linux + 252)
#endif
#ifndef __NR_statfs64
#define __NR_statfs64 (__NR_Linux + 255)
#endif
#ifndef __NR_fstatfs64
#define __NR_fstatfs64 (__NR_Linux + 256)
#endif
#ifndef __NR_openat
#define __NR_openat (__NR_Linux + 288)
#endif
#ifndef __NR_fstatat
#define __NR_fstatat (__NR_Linux + 293)
#endif
#ifndef __NR_unlinkat
#define __NR_unlinkat (__NR_Linux + 294)
#endif
#ifndef __NR_move_pages
#define __NR_move_pages (__NR_Linux + 308)
#endif
/* End of MIPS (old 32bit API) definitions */
#elif _MIPS_SIM == _MIPS_SIM_ABI64
#ifndef __NR_setresuid
#define __NR_setresuid (__NR_Linux + 115)
#define __NR_setresgid (__NR_Linux + 117)
#endif
#ifndef __NR_gettid
#define __NR_gettid (__NR_Linux + 178)
#endif
#ifndef __NR_readahead
#define __NR_readahead (__NR_Linux + 179)
#endif
#ifndef __NR_setxattr
#define __NR_setxattr (__NR_Linux + 180)
#endif
#ifndef __NR_lsetxattr
#define __NR_lsetxattr (__NR_Linux + 181)
#endif
#ifndef __NR_getxattr
#define __NR_getxattr (__NR_Linux + 183)
#endif
#ifndef __NR_lgetxattr
#define __NR_lgetxattr (__NR_Linux + 184)
#endif
#ifndef __NR_futex
#define __NR_futex (__NR_Linux + 194)
#endif
#ifndef __NR_sched_setaffinity
#define __NR_sched_setaffinity (__NR_Linux + 195)
#define __NR_sched_getaffinity (__NR_Linux + 196)
#endif
#ifndef __NR_set_tid_address
#define __NR_set_tid_address (__NR_Linux + 212)
#endif
#ifndef __NR_openat
#define __NR_openat (__NR_Linux + 247)
#endif
#ifndef __NR_fstatat
#define __NR_fstatat (__NR_Linux + 252)
#endif
#ifndef __NR_unlinkat
#define __NR_unlinkat (__NR_Linux + 253)
#endif
#ifndef __NR_move_pages
#define __NR_move_pages (__NR_Linux + 267)
#endif
/* End of MIPS (64bit API) definitions */
#else
#ifndef __NR_setresuid
#define __NR_setresuid (__NR_Linux + 115)
#define __NR_setresgid (__NR_Linux + 117)
#endif
#ifndef __NR_gettid
#define __NR_gettid (__NR_Linux + 178)
#endif
#ifndef __NR_readahead
#define __NR_readahead (__NR_Linux + 179)
#endif
#ifndef __NR_setxattr
#define __NR_setxattr (__NR_Linux + 180)
#endif
#ifndef __NR_lsetxattr
#define __NR_lsetxattr (__NR_Linux + 181)
#endif
#ifndef __NR_getxattr
#define __NR_getxattr (__NR_Linux + 183)
#endif
#ifndef __NR_lgetxattr
#define __NR_lgetxattr (__NR_Linux + 184)
#endif
#ifndef __NR_futex
#define __NR_futex (__NR_Linux + 194)
#endif
#ifndef __NR_sched_setaffinity
#define __NR_sched_setaffinity (__NR_Linux + 195)
#define __NR_sched_getaffinity (__NR_Linux + 196)
#endif
#ifndef __NR_set_tid_address
#define __NR_set_tid_address (__NR_Linux + 213)
#endif
#ifndef __NR_statfs64
#define __NR_statfs64 (__NR_Linux + 217)
#endif
#ifndef __NR_fstatfs64
#define __NR_fstatfs64 (__NR_Linux + 218)
#endif
#ifndef __NR_openat
#define __NR_openat (__NR_Linux + 251)
#endif
#ifndef __NR_fstatat
#define __NR_fstatat (__NR_Linux + 256)
#endif
#ifndef __NR_unlinkat
#define __NR_unlinkat (__NR_Linux + 257)
#endif
#ifndef __NR_move_pages
#define __NR_move_pages (__NR_Linux + 271)
#endif
/* End of MIPS (new 32bit API) definitions */
#endif
/* End of MIPS definitions */
#endif
/* After forking, we must make sure to only call system calls. */
#if __BOUNDED_POINTERS__
#error "Need to port invocations of syscalls for bounded ptrs"
#else
/* The core dumper and the thread lister get executed after threads
* have been suspended. As a consequence, we cannot call any functions
* that acquire locks. Unfortunately, libc wraps most system calls
* (e.g. in order to implement pthread_atfork, and to make calls
* cancellable), which means we cannot call these functions. Instead,
* we have to call syscall() directly.
*/
#undef LSS_ERRNO
#ifdef SYS_ERRNO
/* Allow the including file to override the location of errno. This can
* be useful when using clone() with the CLONE_VM option.
*/
#define LSS_ERRNO SYS_ERRNO
#else
#define LSS_ERRNO errno
#endif
#undef LSS_INLINE
#ifdef SYS_INLINE
#define LSS_INLINE SYS_INLINE
#else
#define LSS_INLINE static inline
#endif
/* Allow the including file to override the prefix used for all new
* system calls. By default, it will be set to "sys_".
*/
#undef LSS_NAME
#ifndef SYS_PREFIX
#define LSS_NAME(name) sys_##name
#elif SYS_PREFIX < 0
#define LSS_NAME(name) name
#elif SYS_PREFIX == 0
#define LSS_NAME(name) sys0_##name
#elif SYS_PREFIX == 1
#define LSS_NAME(name) sys1_##name
#elif SYS_PREFIX == 2
#define LSS_NAME(name) sys2_##name
#elif SYS_PREFIX == 3
#define LSS_NAME(name) sys3_##name
#elif SYS_PREFIX == 4
#define LSS_NAME(name) sys4_##name
#elif SYS_PREFIX == 5
#define LSS_NAME(name) sys5_##name
#elif SYS_PREFIX == 6
#define LSS_NAME(name) sys6_##name
#elif SYS_PREFIX == 7
#define LSS_NAME(name) sys7_##name
#elif SYS_PREFIX == 8
#define LSS_NAME(name) sys8_##name
#elif SYS_PREFIX == 9
#define LSS_NAME(name) sys9_##name
#endif
#undef LSS_RETURN
#ifndef mips
/* Failing system calls return a negative result in the range of
* -1..-4095. These are "errno" values with the sign inverted.
*/
#define LSS_RETURN(type, res) \
do { \
if ((unsigned long)(res) >= (unsigned long)(-4095)) { \
LSS_ERRNO = -(res); \
res = -1; \
} \
return (type) (res); \
} while (0)
#else
/* On MIPS, failing system calls return -1, and set errno in a
* separate CPU register.
*/
#define LSS_RETURN(type, res, err) \
do { \
if (err) { \
LSS_ERRNO = (res); \
res = -1; \
} \
return (type) (res); \
} while (0)
#endif
#if defined(__i386__)
/* In PIC mode (e.g. when building shared libraries), gcc for i386
* reserves ebx. Unfortunately, most distribution ship with implementations
* of _syscallX() which clobber ebx.
* Also, most definitions of _syscallX() neglect to mark "memory" as being
* clobbered. This causes problems with compilers, that do a better job
* at optimizing across __asm__ calls.
* So, we just have to redefine all of the _syscallX() macros.
*/
#undef LSS_BODY
#define LSS_BODY(type,args...) \
long __res; \
__asm__ __volatile__("push %%ebx\n" \
"movl %2,%%ebx\n" \
"int $0x80\n" \
"pop %%ebx" \
args \
: "memory"); \
LSS_RETURN(type,__res)
#undef _syscall0
#define _syscall0(type,name) \
type LSS_NAME(name)(void) { \
long __res; \
__asm__ volatile("int $0x80" \
: "=a" (__res) \
: "0" (__NR_##name) \
: "memory"); \
LSS_RETURN(type,__res); \
}
#undef _syscall1
#define _syscall1(type,name,type1,arg1) \
type LSS_NAME(name)(type1 arg1) { \
LSS_BODY(type, \
: "=a" (__res) \
: "0" (__NR_##name), "ri" ((long)(arg1))); \
}
#undef _syscall2
#define _syscall2(type,name,type1,arg1,type2,arg2) \
type LSS_NAME(name)(type1 arg1,type2 arg2) { \
LSS_BODY(type, \
: "=a" (__res) \
: "0" (__NR_##name),"ri" ((long)(arg1)), "c" ((long)(arg2))); \
}
#undef _syscall3
#define _syscall3(type,name,type1,arg1,type2,arg2,type3,arg3) \
type LSS_NAME(name)(type1 arg1,type2 arg2,type3 arg3) { \
LSS_BODY(type, \
: "=a" (__res) \
: "0" (__NR_##name), "ri" ((long)(arg1)), "c" ((long)(arg2)), \
"d" ((long)(arg3))); \
}
#undef _syscall4
#define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4) \
type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3, type4 arg4) { \
LSS_BODY(type, \
: "=a" (__res) \
: "0" (__NR_##name), "ri" ((long)(arg1)), "c" ((long)(arg2)), \
"d" ((long)(arg3)),"S" ((long)(arg4))); \
}
#undef _syscall5
#define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4, \
type5,arg5) \
type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3, type4 arg4, \
type5 arg5) { \
long __res; \
__asm__ __volatile__("push %%ebx\n" \
"movl %2,%%ebx\n" \
"movl %1,%%eax\n" \
"int $0x80\n" \
"pop %%ebx" \
: "=a" (__res) \
: "i" (__NR_##name), "ri" ((long)(arg1)), \
"c" ((long)(arg2)), "d" ((long)(arg3)), \
"S" ((long)(arg4)), "D" ((long)(arg5)) \
: "memory"); \
LSS_RETURN(type,__res); \
}
#undef _syscall6
#define _syscall6(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4, \
type5,arg5,type6,arg6) \
type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3, type4 arg4, \
type5 arg5, type6 arg6) { \
long __res; \
struct { long __a1; long __a6; } __s = { (long)arg1, (long) arg6 }; \
__asm__ __volatile__("push %%ebp\n" \
"push %%ebx\n" \
"movl 4(%2),%%ebp\n" \
"movl 0(%2), %%ebx\n" \
"movl %1,%%eax\n" \
"int $0x80\n" \
"pop %%ebx\n" \
"pop %%ebp" \
: "=a" (__res) \
: "i" (__NR_##name), "0" ((long)(&__s)), \
"c" ((long)(arg2)), "d" ((long)(arg3)), \
"S" ((long)(arg4)), "D" ((long)(arg5)) \
: "memory"); \
LSS_RETURN(type,__res); \
}
LSS_INLINE int LSS_NAME(clone)(int (*fn)(void *), void *child_stack,
int flags, void *arg, int *parent_tidptr,
void *newtls, int *child_tidptr) {
long __res;
__asm__ __volatile__(/* if (fn == NULL)
* return -EINVAL;
*/
"movl %3,%%ecx\n"
"jecxz 1f\n"
/* if (child_stack == NULL)
* return -EINVAL;
*/
"movl %4,%%ecx\n"
"jecxz 1f\n"
/* Set up alignment of the child stack:
* child_stack = (child_stack & ~0xF) - 20;
*/
"andl $-16,%%ecx\n"
"subl $20,%%ecx\n"
/* Push "arg" and "fn" onto the stack that will be
* used by the child.
*/
"movl %6,%%eax\n"
"movl %%eax,4(%%ecx)\n"
"movl %3,%%eax\n"
"movl %%eax,(%%ecx)\n"
/* %eax = syscall(%eax = __NR_clone,
* %ebx = flags,
* %ecx = child_stack,
* %edx = parent_tidptr,
* %esi = newtls,
* %edi = child_tidptr)
* Also, make sure that %ebx gets preserved as it is
* used in PIC mode.
*/
"movl %8,%%esi\n"
"movl %7,%%edx\n"
"movl %5,%%eax\n"
"movl %9,%%edi\n"
"pushl %%ebx\n"
"movl %%eax,%%ebx\n"
"movl %2,%%eax\n"
"int $0x80\n"
/* In the parent: restore %ebx
* In the child: move "fn" into %ebx
*/
"popl %%ebx\n"
/* if (%eax != 0)
* return %eax;
*/
"test %%eax,%%eax\n"
"jnz 1f\n"
/* In the child, now. Terminate frame pointer chain.
*/
"movl $0,%%ebp\n"
/* Call "fn". "arg" is already on the stack.
*/
"call *%%ebx\n"
/* Call _exit(%ebx). Unfortunately older versions
* of gcc restrict the number of arguments that can
* be passed to asm(). So, we need to hard-code the
* system call number.
*/
"movl %%eax,%%ebx\n"
"movl $1,%%eax\n"
"int $0x80\n"
/* Return to parent.
*/
"1:\n"
: "=a" (__res)
: "0"(-EINVAL), "i"(__NR_clone),
"m"(fn), "m"(child_stack), "m"(flags), "m"(arg),
"m"(parent_tidptr), "m"(newtls), "m"(child_tidptr)
: "memory", "ecx", "edx", "esi", "edi");
LSS_RETURN(int, __res);
}
#define __NR__fadvise64_64 __NR_fadvise64_64
LSS_INLINE _syscall6(int, _fadvise64_64, int, fd,
unsigned, offset_lo, unsigned, offset_hi,
unsigned, len_lo, unsigned, len_hi,
int, advice)
LSS_INLINE int LSS_NAME(fadvise64)(int fd, loff_t offset,
loff_t len, int advice) {
return LSS_NAME(_fadvise64_64)(fd,
(unsigned)offset, (unsigned)(offset >> 32),
(unsigned)len, (unsigned)(len >> 32),
advice);
}
#define __NR__readahead32 __NR_readahead
LSS_INLINE _syscall4(int, _readahead32, int, fd, unsigned, offset_lo,
unsigned, offset_hi, unsigned, len);
LSS_INLINE int LSS_NAME(readahead)(int fd, loff_t offset, int len) {
return LSS_NAME(_readahead32)(fd,
(unsigned)offset, (unsigned)(offset >> 32),
(unsigned)len);
}
#elif defined(__x86_64__)
/* There are no known problems with any of the _syscallX() macros
* currently shipping for x86_64, but we still need to be able to define
* our own version so that we can override the location of the errno
* location (e.g. when using the clone() system call with the CLONE_VM
* option).
*/
#undef LSS_BODY
#define LSS_BODY(type,name, ...) \
long __res; \
__asm__ __volatile__("syscall" : "=a" (__res) : "0" (__NR_##name), \
##__VA_ARGS__ : "r11", "rcx", "memory"); \
LSS_RETURN(type, __res)
#undef _syscall0
#define _syscall0(type,name) \
type LSS_NAME(name)() { \
LSS_BODY(type, name); \
}
#undef _syscall1
#define _syscall1(type,name,type1,arg1) \
type LSS_NAME(name)(type1 arg1) { \
LSS_BODY(type, name, "D" ((long)(arg1))); \
}
#undef _syscall2
#define _syscall2(type,name,type1,arg1,type2,arg2) \
type LSS_NAME(name)(type1 arg1, type2 arg2) { \
LSS_BODY(type, name, "D" ((long)(arg1)), "S" ((long)(arg2))); \
}
#undef _syscall3
#define _syscall3(type,name,type1,arg1,type2,arg2,type3,arg3) \
type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3) { \
LSS_BODY(type, name, "D" ((long)(arg1)), "S" ((long)(arg2)), \
"d" ((long)(arg3))); \
}
#undef _syscall4
#define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4) \
type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3, type4 arg4) { \
long __res; \
__asm__ __volatile__("movq %5,%%r10; syscall" : \
"=a" (__res) : "0" (__NR_##name), \
"D" ((long)(arg1)), "S" ((long)(arg2)), "d" ((long)(arg3)), \
"g" ((long)(arg4)) : "r10", "r11", "rcx", "memory"); \
LSS_RETURN(type, __res); \
}
#undef _syscall5
#define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4, \
type5,arg5) \
type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3, type4 arg4, \
type5 arg5) { \
long __res; \
__asm__ __volatile__("movq %5,%%r10; movq %6,%%r8; syscall" : \
"=a" (__res) : "0" (__NR_##name), \
"D" ((long)(arg1)), "S" ((long)(arg2)), "d" ((long)(arg3)), \
"g" ((long)(arg4)), "g" ((long)(arg5)) : \
"r8", "r10", "r11", "rcx", "memory"); \
LSS_RETURN(type, __res); \
}
#undef _syscall6
#define _syscall6(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4, \
type5,arg5,type6,arg6) \
type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3, type4 arg4, \
type5 arg5, type6 arg6) { \
long __res; \
__asm__ __volatile__("movq %5,%%r10; movq %6,%%r8; movq %7,%%r9;" \
"syscall" : \
"=a" (__res) : "0" (__NR_##name), \
"D" ((long)(arg1)), "S" ((long)(arg2)), "d" ((long)(arg3)), \
"g" ((long)(arg4)), "g" ((long)(arg5)), "g" ((long)(arg6)) : \
"r8", "r9", "r10", "r11", "rcx", "memory"); \
LSS_RETURN(type, __res); \
}
LSS_INLINE int LSS_NAME(clone)(int (*fn)(void *), void *child_stack,
int flags, void *arg, int *parent_tidptr,
void *newtls, int *child_tidptr) {
long __res;
{
register void *__tls __asm__("r8") = newtls;
register int *__ctid __asm__("r10") = child_tidptr;
__asm__ __volatile__(/* if (fn == NULL)
* return -EINVAL;
*/
"testq %4,%4\n"
"jz 1f\n"
/* if (child_stack == NULL)
* return -EINVAL;
*/
"testq %5,%5\n"
"jz 1f\n"
/* childstack -= 2*sizeof(void *);
*/
"subq $16,%5\n"
/* Push "arg" and "fn" onto the stack that will be
* used by the child.
*/
"movq %7,8(%5)\n"
"movq %4,0(%5)\n"
/* %rax = syscall(%rax = __NR_clone,
* %rdi = flags,
* %rsi = child_stack,
* %rdx = parent_tidptr,
* %r8 = new_tls,
* %r10 = child_tidptr)
*/
"movq %2,%%rax\n"
"syscall\n"
/* if (%rax != 0)
* return;
*/
"testq %%rax,%%rax\n"
"jnz 1f\n"
/* In the child. Terminate frame pointer chain.
*/
"xorq %%rbp,%%rbp\n"
/* Call "fn(arg)".
*/
"popq %%rax\n"
"popq %%rdi\n"
"call *%%rax\n"
/* Call _exit(%ebx).
*/
"movq %%rax,%%rdi\n"
"movq %3,%%rax\n"
"syscall\n"
/* Return to parent.
*/
"1:\n"
: "=a" (__res)
: "0"(-EINVAL), "i"(__NR_clone), "i"(__NR_exit),
"r"(fn), "S"(child_stack), "D"(flags), "r"(arg),
"d"(parent_tidptr), "r"(__tls), "r"(__ctid)
: "memory", "r11", "rcx");
}
LSS_RETURN(int, __res);
}
LSS_INLINE _syscall4(int, fadvise64, int, fd, loff_t, offset, loff_t, len,
int, advice)
LSS_INLINE _syscall2(int, statfs, const char *, path, struct statfs *, buf)
LSS_INLINE _syscall2(int, fstatfs, int, fd, struct statfs *, buf)
#elif defined(__ARM_ARCH_3__)
/* Most definitions of _syscallX() neglect to mark "memory" as being
* clobbered. This causes problems with compilers, that do a better job
* at optimizing across __asm__ calls.
* So, we just have to redefine all fo the _syscallX() macros.
*/
#undef LSS_REG
#define LSS_REG(r,a) register long __r##r __asm__("r"#r) = (long)a
#undef LSS_BODY
#define LSS_BODY(type,name,args...) \
register long __res_r0 __asm__("r0"); \
long __res; \
__asm__ __volatile__ (__syscall(name) \
: "=r"(__res_r0) : args : "lr", "memory"); \
__res = __res_r0; \
LSS_RETURN(type, __res)
#undef _syscall0
#define _syscall0(type, name) \
type LSS_NAME(name)() { \
LSS_BODY(type, name); \
}
#undef _syscall1
#define _syscall1(type, name, type1, arg1) \
type LSS_NAME(name)(type1 arg1) { \
LSS_REG(0, arg1); LSS_BODY(type, name, "r"(__r0)); \
}
#undef _syscall2
#define _syscall2(type, name, type1, arg1, type2, arg2) \
type LSS_NAME(name)(type1 arg1, type2 arg2) { \
LSS_REG(0, arg1); LSS_REG(1, arg2); \
LSS_BODY(type, name, "r"(__r0), "r"(__r1)); \
}
#undef _syscall3
#define _syscall3(type, name, type1, arg1, type2, arg2, type3, arg3) \
type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3) { \
LSS_REG(0, arg1); LSS_REG(1, arg2); LSS_REG(2, arg3); \
LSS_BODY(type, name, "r"(__r0), "r"(__r1), "r"(__r2)); \
}
#undef _syscall4
#define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4) \
type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3, type4 arg4) { \
LSS_REG(0, arg1); LSS_REG(1, arg2); LSS_REG(2, arg3); \
LSS_REG(3, arg4); \
LSS_BODY(type, name, "r"(__r0), "r"(__r1), "r"(__r2), "r"(__r3)); \
}
#undef _syscall5
#define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4, \
type5,arg5) \
type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3, type4 arg4, \
type5 arg5) { \
LSS_REG(0, arg1); LSS_REG(1, arg2); LSS_REG(2, arg3); \
LSS_REG(3, arg4); LSS_REG(4, arg5); \
LSS_BODY(type, name, "r"(__r0), "r"(__r1), "r"(__r2), "r"(__r3), \
"r"(__r4)); \
}
#undef _syscall6
#define _syscall6(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4, \
type5,arg5,type6,arg6) \
type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3, type4 arg4, \
type5 arg5, type6 arg6) { \
LSS_REG(0, arg1); LSS_REG(1, arg2); LSS_REG(2, arg3); \
LSS_REG(3, arg4); LSS_REG(4, arg5); LSS_REG(5, arg6); \
LSS_BODY(type, name, "r"(__r0), "r"(__r1), "r"(__r2), "r"(__r3), \
"r"(__r4), "r"(__r5)); \
}
LSS_INLINE int LSS_NAME(clone)(int (*fn)(void *), void *child_stack,
int flags, void *arg, int *parent_tidptr,
void *newtls, int *child_tidptr) {
long __res;
{
register int __flags __asm__("r0") = flags;
register void *__stack __asm__("r1") = child_stack;
register void *__ptid __asm__("r2") = parent_tidptr;
register void *__tls __asm__("r3") = newtls;
register int *__ctid __asm__("r4") = child_tidptr;
__asm__ __volatile__(/* if (fn == NULL || child_stack == NULL)
* return -EINVAL;
*/
"cmp %2,#0\n"
"cmpne %3,#0\n"
"moveq %0,%1\n"
"beq 1f\n"
/* Push "arg" and "fn" onto the stack that will be
* used by the child.
*/
"str %5,[%3,#-4]!\n"
"str %2,[%3,#-4]!\n"
/* %r0 = syscall(%r0 = flags,
* %r1 = child_stack,
* %r2 = parent_tidptr,
* %r3 = newtls,
* %r4 = child_tidptr)
*/
__syscall(clone)"\n"
/* if (%r0 != 0)
* return %r0;
*/
"movs %0,r0\n"
"bne 1f\n"
/* In the child, now. Call "fn(arg)".
*/
"ldr r0,[sp, #4]\n"
"mov lr,pc\n"
"ldr pc,[sp]\n"
/* Call _exit(%r0).
*/
__syscall(exit)"\n"
"1:\n"
: "=r" (__res)
: "i"(-EINVAL),
"r"(fn), "r"(__stack), "r"(__flags), "r"(arg),
"r"(__ptid), "r"(__tls), "r"(__ctid)
: "lr", "memory");
}
LSS_RETURN(int, __res);
}
#elif defined(mips)
#undef LSS_REG
#define LSS_REG(r,a) register unsigned long __r##r __asm__("$"#r) = \
(unsigned long)(a)
#undef LSS_BODY
#define LSS_BODY(type,name,r7,...) \
register unsigned long __v0 __asm__("$2") = __NR_##name; \
__asm__ __volatile__ ("syscall\n" \
: "=&r"(__v0), r7 (__r7) \
: "0"(__v0), ##__VA_ARGS__ \
: "$8", "$9", "$10", "$11", "$12", \
"$13", "$14", "$15", "$24", "memory"); \
LSS_RETURN(type, __v0, __r7)
#undef _syscall0
#define _syscall0(type, name) \
type LSS_NAME(name)() { \
register unsigned long __r7 __asm__("$7"); \
LSS_BODY(type, name, "=r"); \
}
#undef _syscall1
#define _syscall1(type, name, type1, arg1) \
type LSS_NAME(name)(type1 arg1) { \
register unsigned long __r7 __asm__("$7"); \
LSS_REG(4, arg1); LSS_BODY(type, name, "=r", "r"(__r4)); \
}
#undef _syscall2
#define _syscall2(type, name, type1, arg1, type2, arg2) \
type LSS_NAME(name)(type1 arg1, type2 arg2) { \
register unsigned long __r7 __asm__("$7"); \
LSS_REG(4, arg1); LSS_REG(5, arg2); \
LSS_BODY(type, name, "=r", "r"(__r4), "r"(__r5)); \
}
#undef _syscall3
#define _syscall3(type, name, type1, arg1, type2, arg2, type3, arg3) \
type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3) { \
register unsigned long __r7 __asm__("$7"); \
LSS_REG(4, arg1); LSS_REG(5, arg2); LSS_REG(6, arg3); \
LSS_BODY(type, name, "=r", "r"(__r4), "r"(__r5), "r"(__r6)); \
}
#undef _syscall4
#define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4) \
type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3, type4 arg4) { \
LSS_REG(4, arg1); LSS_REG(5, arg2); LSS_REG(6, arg3); \
LSS_REG(7, arg4); \
LSS_BODY(type, name, "+r", "r"(__r4), "r"(__r5), "r"(__r6)); \
}
#undef _syscall5
#if _MIPS_SIM == _MIPS_SIM_ABI32
/* The old 32bit MIPS system call API passes the fifth and sixth argument
* on the stack, whereas the new APIs use registers "r8" and "r9".
*/
#define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4, \
type5,arg5) \
type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3, type4 arg4, \
type5 arg5) { \
LSS_REG(4, arg1); LSS_REG(5, arg2); LSS_REG(6, arg3); \
LSS_REG(7, arg4); \
register unsigned long __v0 __asm__("$2"); \
__asm__ __volatile__ (".set noreorder\n" \
"lw $2, %6\n" \
"subu $29, 32\n" \
"sw $2, 16($29)\n" \
"li $2, %2\n" \
"syscall\n" \
"addiu $29, 32\n" \
".set reorder\n" \
: "=&r"(__v0), "+r" (__r7) \
: "i" (__NR_##name), "r"(__r4), "r"(__r5), \
"r"(__r6), "m" ((unsigned long)arg5) \
: "$8", "$9", "$10", "$11", "$12", \
"$13", "$14", "$15", "$24", "memory"); \
LSS_RETURN(type, __v0, __r7); \
}
#else
#define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4, \
type5,arg5) \
type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3, type4 arg4, \
type5 arg5) { \
LSS_REG(4, arg1); LSS_REG(5, arg2); LSS_REG(6, arg3); \
LSS_REG(7, arg4); LSS_REG(8, arg5); \
LSS_BODY(type, name, "+r", "r"(__r4), "r"(__r5), "r"(__r6), \
"r"(__r8)); \
}
#endif
#undef _syscall6
#if _MIPS_SIM == _MIPS_SIM_ABI32
/* The old 32bit MIPS system call API passes the fifth and sixth argument
* on the stack, whereas the new APIs use registers "r8" and "r9".
*/
#define _syscall6(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4, \
type5,arg5,type6,arg6) \
type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3, type4 arg4, \
type5 arg5, type6 arg6) { \
LSS_REG(4, arg1); LSS_REG(5, arg2); LSS_REG(6, arg3); \
LSS_REG(7, arg4); \
register unsigned long __v0 __asm__("$2"); \
__asm__ __volatile__ (".set noreorder\n" \
"lw $2, %6\n" \
"lw $8, %7\n" \
"subu $29, 32\n" \
"sw $2, 16($29)\n" \
"sw $8, 20($29)\n" \
"li $2, %2\n" \
"syscall\n" \
"addiu $29, 32\n" \
".set reorder\n" \
: "=&r"(__v0), "+r" (__r7) \
: "i" (__NR_##name), "r"(__r4), "r"(__r5), \
"r"(__r6), "m" ((unsigned long)arg5), \
"m" ((unsigned long)arg6) \
: "$8", "$9", "$10", "$11", "$12", \
"$13", "$14", "$15", "$24", "memory"); \
LSS_RETURN(type, __v0, __r7); \
}
#else
#define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4, \
type5,arg5,type6,arg6) \
type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3, type4 arg4, \
type5 arg5,type6 arg6) { \
LSS_REG(4, arg1); LSS_REG(5, arg2); LSS_REG(6, arg3); \
LSS_REG(7, arg4); LSS_REG(8, arg5); LSS_REG(9, arg6); \
LSS_BODY(type, name, "+r", "r"(__r4), "r"(__r5), "r"(__r6), \
"r"(__r8), "r"(__r9)); \
}
#endif
LSS_INLINE int LSS_NAME(clone)(int (*fn)(void *), void *child_stack,
int flags, void *arg, int *parent_tidptr,
void *newtls, int *child_tidptr) {
register unsigned long __v0 __asm__("$2");
register unsigned long __r7 __asm__("$7") = (unsigned long)newtls;
{
register int __flags __asm__("$4") = flags;
register void *__stack __asm__("$5") = child_stack;
register void *__ptid __asm__("$6") = parent_tidptr;
register int *__ctid __asm__("$8") = child_tidptr;
__asm__ __volatile__(
#if _MIPS_SIM == _MIPS_SIM_ABI32 && _MIPS_SZPTR == 32
"subu $29,24\n"
#elif _MIPS_SIM == _MIPS_SIM_NABI32
"sub $29,16\n"
#else
"dsubu $29,16\n"
#endif
/* if (fn == NULL || child_stack == NULL)
* return -EINVAL;
*/
"li %0,%2\n"
"beqz %5,1f\n"
"beqz %6,1f\n"
/* Push "arg" and "fn" onto the stack that will be
* used by the child.
*/
#if _MIPS_SIM == _MIPS_SIM_ABI32 && _MIPS_SZPTR == 32
"subu %6,32\n"
"sw %5,0(%6)\n"
"sw %8,4(%6)\n"
#elif _MIPS_SIM == _MIPS_SIM_NABI32
"sub %6,32\n"
"sw %5,0(%6)\n"
"sw %8,8(%6)\n"
#else
"dsubu %6,32\n"
"sd %5,0(%6)\n"
"sd %8,8(%6)\n"
#endif
/* $7 = syscall($4 = flags,
* $5 = child_stack,
* $6 = parent_tidptr,
* $7 = newtls,
* $8 = child_tidptr)
*/
"li $2,%3\n"
"syscall\n"
/* if ($7 != 0)
* return $2;
*/
"bnez $7,1f\n"
"bnez $2,1f\n"
/* In the child, now. Call "fn(arg)".
*/
#if _MIPS_SIM == _MIPS_SIM_ABI32 && _MIPS_SZPTR == 32
"lw $25,0($29)\n"
"lw $4,4($29)\n"
#elif _MIPS_SIM == _MIPS_SIM_NABI32
"lw $25,0($29)\n"
"lw $4,8($29)\n"
#else
"ld $25,0($29)\n"
"ld $4,8($29)\n"
#endif
"jalr $25\n"
/* Call _exit($2)
*/
"move $4,$2\n"
"li $2,%4\n"
"syscall\n"
"1:\n"
#if _MIPS_SIM == _MIPS_SIM_ABI32 && _MIPS_SZPTR == 32
"addu $29, 24\n"
#elif _MIPS_SIM == _MIPS_SIM_NABI32
"add $29, 16\n"
#else
"daddu $29,16\n"
#endif
: "=&r" (__v0), "=r" (__r7)
: "i"(-EINVAL), "i"(__NR_clone), "i"(__NR_exit),
"r"(fn), "r"(__stack), "r"(__flags), "r"(arg),
"r"(__ptid), "r"(__r7), "r"(__ctid)
: "$9", "$10", "$11", "$12", "$13", "$14", "$15",
"$24", "memory");
}
LSS_RETURN(int, __v0, __r7);
}
#endif
#define __NR__exit __NR_exit
#define __NR__gettid __NR_gettid
#define __NR__mremap __NR_mremap
LSS_INLINE _syscall1(int, chdir, const char *,p)
LSS_INLINE _syscall1(int, close, int, f)
LSS_INLINE _syscall1(int, dup, int, f)
LSS_INLINE _syscall2(int, dup2, int, s,
int, d)
LSS_INLINE _syscall3(int, execve, const char*, f,
const char*const*,a,const char*const*, e)
LSS_INLINE _syscall1(int, _exit, int, e)
LSS_INLINE _syscall3(int, fcntl, int, f,
int, c, long, a)
LSS_INLINE _syscall0(pid_t, fork)
LSS_INLINE _syscall2(int, fstat, int, f,
struct stat*, b)
LSS_INLINE _syscall4(int, futex, int*, a,
int, o, int, v, struct timespec *, t)
LSS_INLINE _syscall3(int, getdents, int, f,
struct dirent*, d, int, c)
LSS_INLINE _syscall3(int, getdents64, int, f,
struct dirent64*, d, int, c)
LSS_INLINE _syscall0(gid_t, getegid)
LSS_INLINE _syscall0(uid_t, geteuid)
LSS_INLINE _syscall0(pid_t, getpgrp)
LSS_INLINE _syscall0(pid_t, getpid)
LSS_INLINE _syscall0(pid_t, getppid)
LSS_INLINE _syscall2(int, getpriority, int, a,
int, b)
LSS_INLINE _syscall2(int, getrlimit, int, r,
struct rlimit*, l)
LSS_INLINE _syscall1(pid_t, getsid, pid_t, p)
LSS_INLINE _syscall0(pid_t, _gettid)
LSS_INLINE _syscall5(int, setxattr, const char *,p,
const char *, n, const void *,v,
size_t, s, int, f)
LSS_INLINE _syscall5(int, lsetxattr, const char *,p,
const char *, n, const void *,v,
size_t, s, int, f)
LSS_INLINE _syscall4(ssize_t, getxattr, const char *,p,
const char *, n, void *, v, size_t, s)
LSS_INLINE _syscall4(ssize_t, lgetxattr, const char *,p,
const char *, n, void *, v, size_t, s)
LSS_INLINE _syscall2(int, kill, pid_t, p,
int, s)
LSS_INLINE _syscall3(off_t, lseek, int, f,
off_t, o, int, w)
LSS_INLINE _syscall2(int, munmap, void*, s,
size_t, l)
LSS_INLINE _syscall6(long, move_pages, pid_t, p,
unsigned long, n, void **,g, int *, d,
int *, s, int, f)
LSS_INLINE _syscall5(void*, _mremap, void*, o,
size_t, os, size_t, ns,
unsigned long, f, void *, a)
LSS_INLINE _syscall3(int, open, const char*, p,
int, f, int, m)
LSS_INLINE _syscall3(int, poll, struct pollfd*, u,
unsigned int, n, int, t)
LSS_INLINE _syscall2(int, prctl, int, o,
long, a)
LSS_INLINE _syscall4(long, ptrace, int, r,
pid_t, p, void *, a, void *, d)
LSS_INLINE _syscall3(ssize_t, read, int, f,
void *, b, size_t, c)
LSS_INLINE _syscall3(int, readlink, const char*, p,
char*, b, size_t, s)
LSS_INLINE _syscall3(int, sched_getaffinity,pid_t, p,
unsigned int, l, unsigned long *, m)
LSS_INLINE _syscall3(int, sched_setaffinity,pid_t, p,
unsigned int, l, unsigned long *, m)
LSS_INLINE _syscall0(int, sched_yield)
LSS_INLINE _syscall1(long, set_tid_address, int *, t)
LSS_INLINE _syscall1(int, setfsgid, gid_t, g)
LSS_INLINE _syscall1(int, setfsuid, uid_t, u)
LSS_INLINE _syscall2(int, setpgid, pid_t, p,
pid_t, g)
LSS_INLINE _syscall3(int, setpriority, int, a,
int, b, int, p)
LSS_INLINE _syscall3(int, setresgid, gid_t, r,
gid_t, e, gid_t, s)
LSS_INLINE _syscall3(int, setresuid, uid_t, r,
uid_t, e, uid_t, s)
LSS_INLINE _syscall2(int, setrlimit, int, r,
const struct rlimit*, l)
LSS_INLINE _syscall0(pid_t, setsid)
LSS_INLINE _syscall2(int, sigaltstack, const stack_t*, s,
const stack_t*, o)
LSS_INLINE _syscall2(int, stat, const char*, f,
struct stat*, b)
LSS_INLINE _syscall3(ssize_t, write, int, f,
const void *, b, size_t, c)
LSS_INLINE _syscall3(ssize_t, writev, int, f,
const struct iovec *, v, size_t, c)
#if defined(__x86_64__) || \
(defined(mips) && _MIPS_SIM != _MIPS_SIM_ABI32)
LSS_INLINE _syscall3(int, recvmsg, int, s,
struct msghdr*, m, int, f)
LSS_INLINE _syscall3(int, sendmsg, int, s,
const struct msghdr*, m, int, f)
LSS_INLINE _syscall6(int, sendto, int, s,
const void*, m, size_t, l,
int, f,
const struct sockaddr*, a, int, t)
LSS_INLINE _syscall2(int, shutdown, int, s,
int, h)
LSS_INLINE _syscall3(int, socket, int, d,
int, t, int, p)
LSS_INLINE _syscall4(int, socketpair, int, d,
int, t, int, p, int*, s)
#endif
#if defined(__x86_64__)
LSS_INLINE _syscall6(void*, mmap, void*, s,
size_t, l, int, p,
int, f, int, d,
__off64_t, o)
LSS_INLINE _syscall4(int, newfstatat, int, d,
const char *, p,
struct stat *, b, int, f)
LSS_INLINE _syscall4(int, rt_sigaction, int, s,
const struct sigaction*, a,
struct sigaction*, o, int, c)
LSS_INLINE _syscall2(int, rt_sigpending, sigset_t*, s,
int, c)
LSS_INLINE _syscall4(int, rt_sigprocmask, int, h,
const sigset_t*, s, sigset_t*, o, int, c);
LSS_INLINE int LSS_NAME(setfsgid32)(gid_t gid) {
return LSS_NAME(setfsgid)(gid);
}
LSS_INLINE int LSS_NAME(setfsuid32)(uid_t uid) {
return LSS_NAME(setfsuid)(uid);
}
LSS_INLINE int LSS_NAME(setresgid32)(gid_t rgid, gid_t egid, gid_t sgid) {
return LSS_NAME(setresgid)(rgid, egid, sgid);
}
LSS_INLINE int LSS_NAME(setresuid32)(uid_t ruid, uid_t euid, uid_t suid) {
return LSS_NAME(setresuid)(ruid, euid, suid);
}
LSS_INLINE int LSS_NAME(sigaction)(int signum,
const struct sigaction *act,
struct sigaction *oldact) {
return LSS_NAME(rt_sigaction)(signum, act, oldact, (_NSIG+6)/8);
}
LSS_INLINE int LSS_NAME(sigpending)(sigset_t *set) {
return LSS_NAME(rt_sigpending)(set, (_NSIG+6)/8);
}
LSS_INLINE int LSS_NAME(sigprocmask)(int how, const sigset_t *set,
sigset_t *oldset) {
return LSS_NAME(rt_sigprocmask)(how, set, oldset, (_NSIG+6)/8);
}
#endif
#if defined(__x86_64__) || defined(__ARM_ARCH_3__) || \
(defined(mips) && _MIPS_SIM != _MIPS_SIM_ABI32)
LSS_INLINE _syscall4(pid_t, wait4, pid_t, p,
int*, s, int, o,
struct rusage*, r)
LSS_INLINE pid_t LSS_NAME(waitpid)(pid_t pid, int *status, int options){
return LSS_NAME(wait4)(pid, status, options, 0);
}
#endif
#if defined(__i386__) || defined(__x86_64__)
LSS_INLINE _syscall4(int, openat, int, d, const char *, p, int, f, int, m)
LSS_INLINE _syscall3(int, unlinkat, int, d, const char *, p, int, f)
#endif
#if defined(__i386__) || defined(__ARM_ARCH_3__)
#define __NR__setfsgid32 __NR_setfsgid32
#define __NR__setfsuid32 __NR_setfsuid32
#define __NR__setresgid32 __NR_setresgid32
#define __NR__setresuid32 __NR_setresuid32
LSS_INLINE _syscall2(int, ugetrlimit, int, r,struct rlimit*,l)
LSS_INLINE _syscall1(int, _setfsgid32, gid_t, f)
LSS_INLINE _syscall1(int, _setfsuid32, uid_t, f)
LSS_INLINE _syscall3(int, _setresgid32, gid_t, r,
gid_t, e, gid_t, s)
LSS_INLINE _syscall3(int, _setresuid32, uid_t, r,
uid_t, e, uid_t, s)
LSS_INLINE int LSS_NAME(setfsgid32)(gid_t gid) {
int rc;
if ((rc = LSS_NAME(_setfsgid32)(gid)) < 0 &&
LSS_ERRNO == ENOSYS) {
if ((unsigned int)gid & ~0xFFFFu) {
rc = EINVAL;
} else {
rc = LSS_NAME(setfsgid)(gid);
}
}
return rc;
}
LSS_INLINE int LSS_NAME(setfsuid32)(uid_t uid) {
int rc;
if ((rc = LSS_NAME(_setfsuid32)(uid)) < 0 &&
LSS_ERRNO == ENOSYS) {
if ((unsigned int)uid & ~0xFFFFu) {
rc = EINVAL;
} else {
rc = LSS_NAME(setfsuid)(uid);
}
}
return rc;
}
LSS_INLINE int LSS_NAME(setresgid32)(gid_t rgid, gid_t egid, gid_t sgid) {
int rc;
if ((rc = LSS_NAME(_setresgid32)(rgid, egid, sgid)) < 0 &&
LSS_ERRNO == ENOSYS) {
if ((unsigned int)rgid & ~0xFFFFu ||
(unsigned int)egid & ~0xFFFFu ||
(unsigned int)sgid & ~0xFFFFu) {
rc = EINVAL;
} else {
rc = LSS_NAME(setresgid)(rgid, egid, sgid);
}
}
return rc;
}
LSS_INLINE int LSS_NAME(setresuid32)(uid_t ruid, uid_t euid, uid_t suid) {
int rc;
if ((rc = LSS_NAME(_setresuid32)(ruid, euid, suid)) < 0 &&
LSS_ERRNO == ENOSYS) {
if ((unsigned int)ruid & ~0xFFFFu ||
(unsigned int)euid & ~0xFFFFu ||
(unsigned int)suid & ~0xFFFFu) {
rc = EINVAL;
} else {
rc = LSS_NAME(setresuid)(ruid, euid, suid);
}
}
return rc;
}
#endif
#if defined(__i386__) || defined(__ARM_ARCH_3__) || \
(defined(mips) && _MIPS_SIM == _MIPS_SIM_ABI32)
#define __NR__socketcall __NR_socketcall
LSS_INLINE _syscall5(int, _llseek, uint, fd, ulong, hi, ulong, lo,
loff_t *, res, uint, wh)
LSS_INLINE _syscall1(void*, mmap, void*, a)
LSS_INLINE _syscall6(void*, mmap2, void*, s,
size_t, l, int, p,
int, f, int, d,
__off64_t, o)
LSS_INLINE _syscall3(int, sigaction, int, s,
const struct sigaction*, a, struct sigaction*, o)
LSS_INLINE _syscall1(int, sigpending, sigset_t*, s)
LSS_INLINE _syscall3(int, sigprocmask, int, h,
const sigset_t*, s, sigset_t*, o)
LSS_INLINE _syscall2(int, _socketcall, int, c,
va_list, a)
LSS_INLINE int LSS_NAME(socketcall)(int op, ...) {
int rc;
va_list ap;
va_start(ap, op);
rc = LSS_NAME(_socketcall)(op, ap);
va_end(ap);
return rc;
}
LSS_INLINE ssize_t LSS_NAME(recvmsg)(int s,struct msghdr*msg,int flags){
return (ssize_t)LSS_NAME(socketcall)(17, s, msg, flags);
}
LSS_INLINE ssize_t LSS_NAME(sendmsg)(int s, const struct msghdr *msg,
int flags) {
return (ssize_t)LSS_NAME(socketcall)(16, s, msg, flags);
}
LSS_INLINE ssize_t LSS_NAME(sendto)(int s, const void *buf, size_t len,
int flags, const struct sockaddr*to,
unsigned int tolen) {
return (ssize_t)LSS_NAME(socketcall)(11, s, buf, len, flags, to, tolen);
}
LSS_INLINE int LSS_NAME(shutdown)(int s, int how) {
return LSS_NAME(socketcall)(13, s, how);
}
LSS_INLINE int LSS_NAME(socket)(int domain, int type, int protocol) {
return LSS_NAME(socketcall)(1, domain, type, protocol);
}
LSS_INLINE int LSS_NAME(socketpair)(int d, int type, int protocol,
int sv[2]) {
return LSS_NAME(socketcall)(8, d, type, protocol, sv);
}
#endif
#if defined(__i386__)
LSS_INLINE _syscall4(int, fstatat64, int, d,
const char *, p,
struct stat64 *, b, int, f)
#endif
#if defined(__i386__) || \
(defined(mips) && _MIPS_SIM == _MIPS_SIM_ABI32)
LSS_INLINE _syscall3(pid_t, waitpid, pid_t, p,
int*, s, int, o)
#endif
#if defined(mips)
/* sys_pipe() on MIPS has non-standard calling conventions, as it returns
* both file handles through CPU registers.
*/
LSS_INLINE int LSS_NAME(pipe)(int *p) {
register unsigned long __v0 __asm__("$2") = __NR_pipe;
register unsigned long __v1 __asm__("$3");
register unsigned long __r7 __asm__("$7");
__asm__ __volatile__ ("syscall\n"
: "=&r"(__v0), "=&r"(__v1), "+r" (__r7)
: "0"(__v0)
: "$8", "$9", "$10", "$11", "$12",
"$13", "$14", "$15", "$24", "memory");
if (__r7) {
LSS_ERRNO = __v0;
return -1;
} else {
p[0] = __v0;
p[1] = __v1;
return 0;
}
}
#else
LSS_INLINE _syscall1(int, pipe, int *, p)
#endif
#if defined(__i386__) || defined(__ARM_ARCH_3__) || \
(defined(mips) && _MIPS_SIM != _MIPS_SIM_ABI64)
LSS_INLINE _syscall2(int, statfs64, const char*, p,
struct statfs64 *, b)
LSS_INLINE _syscall2(int, fstatfs64, int, f,
struct statfs64 *, b)
#endif
LSS_INLINE int LSS_NAME(execv)(const char *path, const char * const argv[]) {
extern char **environ;
return LSS_NAME(execve)(path, argv, (const char * const *)environ);
}
LSS_INLINE pid_t LSS_NAME(gettid)() {
pid_t tid = LSS_NAME(_gettid)();
if (tid != -1) {
return tid;
}
return LSS_NAME(getpid)();
}
LSS_INLINE void *LSS_NAME(mremap)(void *old_address, size_t old_size,
size_t new_size, int flags, ...) {
va_list ap;
void *new_address, *rc;
va_start(ap, flags);
new_address = va_arg(ap, void *);
rc = LSS_NAME(_mremap)(old_address, old_size, new_size,
flags, new_address);
va_end(ap);
return rc;
}
LSS_INLINE int LSS_NAME(ptrace_detach)(pid_t pid) {
/* PTRACE_DETACH can sometimes forget to wake up the tracee and it
* then sends job control signals to the real parent, rather than to
* the tracer. We reduce the risk of this happening by starting a
* whole new time slice, and then quickly sending a SIGCONT signal
* right after detaching from the tracee.
*/
int rc, err;
LSS_NAME(sched_yield)();
rc = LSS_NAME(ptrace)(PTRACE_DETACH, pid, (void *)0, (void *)0);
err = LSS_ERRNO;
LSS_NAME(kill)(pid, SIGCONT);
LSS_ERRNO = err;
return rc;
}
LSS_INLINE int LSS_NAME(raise)(int sig) {
return LSS_NAME(kill)(LSS_NAME(getpid)(), sig);
}
LSS_INLINE int LSS_NAME(setpgrp)() {
return LSS_NAME(setpgid)(0, 0);
}
LSS_INLINE int LSS_NAME(sysconf)(int name) {
extern int __getpagesize(void);
switch (name) {
case _SC_OPEN_MAX: {
unsigned long limit[2];
return LSS_NAME(getrlimit)(RLIMIT_NOFILE, (struct rlimit *)limit)<0
? 8192 : limit[0];
}
case _SC_PAGESIZE:
return __getpagesize();
default:
errno = ENOSYS;
return -1;
}
}
#if defined(__x86_64__) || \
(defined(mips) && _MIPS_SIM == _MIPS_SIM_ABI64)
LSS_INLINE _syscall3(int, readahead, int, fd, loff_t, offset,
unsigned, len)
#elif defined(mips) || defined(__ARM_ARCH_3__)
LSS_INLINE _syscall4(int, _readahead32, int, fd, unsigned, offset_lo,
unsigned, offset_hi, unsigned, len);
LSS_INLINE int LSS_NAME(readahead)(int fd, loff_t offset, int len) {
return LSS_NAME(_readahead32)(fd,
#if (defined(__BYTE_ORDER) && (__BYTE_ORDER == __LITTLE_ENDIAN)) || \
(defined(__LITTLE_ENDIAN__))
(unsigned)offset, (unsigned)(offset >> 32),
#elif (defined(__BYTE_ORDER) && (__BYTE_ORDER == __BIG_ENDIAN)) || \
(defined(__BIG_ENDIAN__))
(unsigned)(offset >> 32), (unsigned)offset,
#else
#error "unknown endinness, don't know how to pass syscall arguments"
#endif
(unsigned)len);
}
#endif
#endif
#if defined(__cplusplus) && !defined(SYS_CPLUSPLUS)
}
#endif
#endif
#endif
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