syscall overhaul part two - unify public and internal syscall interface
with this patch, the syscallN() functions are no longer needed; a variadic syscall() macro allows syscalls with anywhere from 0 to 6 arguments to be made with a single macro name. also, manually casting each non-integer argument with (long) is no longer necessary; the casts are hidden in the macros. some source files which depended on being able to define the old macro SYSCALL_RETURNS_ERRNO have been modified to directly use __syscall() instead of syscall(). references to SYSCALL_SIGSET_SIZE and SYSCALL_LL have also been changed. x86_64 has not been tested, and may need a follow-up commit to fix any minor bugs/oversights.
This commit is contained in:
Rich Felker
parent
462dbfc207
commit
685e40bb09
26 changed files with 275 additions and 316 deletions
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@ -14,12 +14,15 @@
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#define O_NOFOLLOW 0400000
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#define O_CLOEXEC 02000000
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#ifdef _GNU_SOURCE
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#define O_NDELAY O_NONBLOCK
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/* Extensions, but in the reserved namespace, so OK */
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#define O_ASYNC 020000
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#define O_DIRECT 040000
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#define O_LARGEFILE 0100000
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#define O_NOATIME 01000000
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#define O_NDELAY O_NONBLOCK
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#define F_DUPFD_CLOEXEC 1030
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#ifdef _GNU_SOURCE
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#define FAPPENT O_APPEND
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#define FFSYNC O_FSYNC
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#define FASYNC O_ASYNC
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@ -1,3 +1,130 @@
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#define __SYSCALL_LL(x) \
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((union { long long ll; long l[2]; }){ .ll = x }).l[0], \
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((union { long long ll; long l[2]; }){ .ll = x }).l[1]
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static inline long __syscall0(long n)
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{
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unsigned long ret;
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__asm__ __volatile__ ("int $128" : "=a"(ret) : "a"(n) : "memory");
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return __syscall_ret(ret);
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}
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#ifndef __PIC__
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static inline long __syscall1(long n, long a1)
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{
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unsigned long ret;
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__asm__ __volatile__ ("int $128" : "=a"(ret) : "a"(n), "b"(a1) : "memory");
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return ret;
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}
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static inline long __syscall2(long n, long a1, long a2)
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{
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unsigned long ret;
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__asm__ __volatile__ ("int $128" : "=a"(ret) : "a"(n), "b"(a1), "c"(a2) : "memory");
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return ret;
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}
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static inline long __syscall3(long n, long a1, long a2, long a3)
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{
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unsigned long ret;
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__asm__ __volatile__ ("int $128" : "=a"(ret) : "a"(n), "b"(a1), "c"(a2), "d"(a3) : "memory");
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return ret;
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}
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static inline long __syscall4(long n, long a1, long a2, long a3, long a4)
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{
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unsigned long ret;
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__asm__ __volatile__ ("int $128" : "=a"(ret) : "a"(n), "b"(a1), "c"(a2), "d"(a3), "S"(a4) : "memory");
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return ret;
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}
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static inline long __syscall5(long n, long a1, long a2, long a3, long a4, long a5)
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{
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unsigned long ret;
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__asm__ __volatile__ ("int $128" : "=a"(ret) : "a"(n), "b"(a1), "c"(a2), "d"(a3), "S"(a4), "D"(a5) : "memory");
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return ret;
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}
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static inline long __syscall6(long n, long a1, long a2, long a3, long a4, long a5, long a6)
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{
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unsigned long ret;
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__asm__ __volatile__ ("pushl %7 ; pushl %%ebp ; mov 4(%%esp),%%ebp ; int $128 ; popl %%ebp ; popl %%ecx"
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: "=a"(ret) : "a"(n), "b"(a1), "c"(a2), "d"(a3), "S"(a4), "D"(a5), "g"(a6) : "memory");
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return ret;
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}
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#else
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static inline long __syscall1(long n, long a1)
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{
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unsigned long ret;
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__asm__ __volatile__ ("xchg %2,%%ebx ; int $128 ; xchg %2,%%ebx"
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: "=a"(ret) : "a"(n), "r"(a1) : "memory");
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return ret;
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}
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static inline long __syscall2(long n, long a1, long a2)
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{
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unsigned long ret;
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__asm__ __volatile__ ("xchg %2,%%ebx ; int $128 ; xchg %2,%%ebx"
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: "=a"(ret) : "a"(n), "r"(a1), "c"(a2) : "memory");
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return ret;
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}
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static inline long __syscall3(long n, long a1, long a2, long a3)
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{
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unsigned long ret;
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__asm__ __volatile__ ("xchg %2,%%ebx ; int $128 ; xchg %2,%%ebx"
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: "=a"(ret) : "a"(n), "r"(a1), "c"(a2), "d"(a3) : "memory");
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return ret;
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}
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static inline long __syscall4(long n, long a1, long a2, long a3, long a4)
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{
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unsigned long ret;
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__asm__ __volatile__ ("xchg %2,%%ebx ; int $128 ; xchg %2,%%ebx"
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: "=a"(ret) : "a"(n), "r"(a1), "c"(a2), "d"(a3), "S"(a4) : "memory");
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return ret;
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}
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static inline long __syscall5(long n, long a1, long a2, long a3, long a4, long a5)
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{
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unsigned long ret;
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__asm__ __volatile__ ("pushl %2 ; pushl %%ebx ; mov 4(%%esp),%%ebx ; int $128 ; popl %%ebx ; popl %%ecx"
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: "=a"(ret) : "a"(n), "g"(a1), "c"(a2), "d"(a3), "S"(a4), "D"(a5) : "memory");
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return ret;
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}
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static inline long __syscall6(long n, long a1, long a2, long a3, long a4, long a5, long a6)
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{
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return (__syscall)(n, a1, a2, a3, a4, a5, a6);
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}
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#endif
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#define __SC_socket 1
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#define __SC_bind 2
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#define __SC_connect 3
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#define __SC_listen 4
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#define __SC_accept 5
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#define __SC_getsockname 6
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#define __SC_getpeername 7
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#define __SC_socketpair 8
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#define __SC_send 9
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#define __SC_recv 10
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#define __SC_sendto 11
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#define __SC_recvfrom 12
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#define __SC_shutdown 13
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#define __SC_setsockopt 14
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#define __SC_getsockopt 15
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#define __SC_sendmsg 16
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#define __SC_recvmsg 17
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#define __socketcall(nm, a, b, c, d, e, f) syscall(SYS_socketcall, __SC_##nm, \
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((long [6]){ (long)a, (long)b, (long)c, (long)d, (long)e, (long)f }))
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#define __NR_restart_syscall 0
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#define __NR_exit 1
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#define __NR_fork 2
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@ -376,6 +503,7 @@
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/* fixup legacy 32-bit-vs-lfs64 junk */
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#undef __NR_fcntl
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#undef __NR_getdents
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#undef __NR_ftruncate
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#undef __NR_truncate
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@ -384,6 +512,7 @@
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#undef __NR_lstat
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#undef __NR_statfs
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#undef __NR_fstatfs
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#define __NR_fcntl __NR_fcntl64
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#define __NR_getdents __NR_getdents64
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#define __NR_ftruncate __NR_ftruncate64
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#define __NR_truncate __NR_truncate64
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@ -783,6 +912,7 @@
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/* fixup legacy 32-bit-vs-lfs64 junk */
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#undef SYS_fcntl
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#undef SYS_getdents
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#undef SYS_ftruncate
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#undef SYS_truncate
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@ -791,6 +921,7 @@
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#undef SYS_lstat
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#undef SYS_statfs
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#undef SYS_fstatfs
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#define SYS_fcntl SYS_fcntl64
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#define SYS_getdents SYS_getdents64
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#define SYS_ftruncate SYS_ftruncate64
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#define SYS_truncate SYS_truncate64
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@ -1,167 +0,0 @@
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#ifndef _SYSCALL_H
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#define _SYSCALL_H
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#include <sys/syscall.h>
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#define SYSCALL_LL(x) \
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((union { long long ll; long l[2]; }){ .ll = x }).l[0], \
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((union { long long ll; long l[2]; }){ .ll = x }).l[1]
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#define SYSCALL_SIGSET_SIZE 8
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#if defined(SYSCALL_NORETURN)
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static inline long __syscall_ret(unsigned long r)
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{
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for(;;);
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return 0;
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}
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#elif defined(SYSCALL_RETURN_ERRNO)
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static inline long __syscall_ret(unsigned long r)
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{
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return -r;
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}
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#else
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extern long __syscall_ret(unsigned long);
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#endif
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static inline long syscall0(long n)
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{
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unsigned long ret;
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__asm__ __volatile__ ("int $128" : "=a"(ret) : "a"(n) : "memory");
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return __syscall_ret(ret);
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}
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#ifndef __PIC__
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static inline long syscall1(long n, long a1)
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{
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unsigned long ret;
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__asm__ __volatile__ ("int $128" : "=a"(ret) : "a"(n), "b"(a1) : "memory");
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return __syscall_ret(ret);
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}
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static inline long syscall2(long n, long a1, long a2)
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{
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unsigned long ret;
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__asm__ __volatile__ ("int $128" : "=a"(ret) : "a"(n), "b"(a1), "c"(a2) : "memory");
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return __syscall_ret(ret);
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}
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static inline long syscall3(long n, long a1, long a2, long a3)
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{
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unsigned long ret;
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__asm__ __volatile__ ("int $128" : "=a"(ret) : "a"(n), "b"(a1), "c"(a2), "d"(a3) : "memory");
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return __syscall_ret(ret);
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}
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static inline long syscall4(long n, long a1, long a2, long a3, long a4)
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{
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unsigned long ret;
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__asm__ __volatile__ ("int $128" : "=a"(ret) : "a"(n), "b"(a1), "c"(a2), "d"(a3), "S"(a4) : "memory");
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return __syscall_ret(ret);
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}
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static inline long syscall5(long n, long a1, long a2, long a3, long a4, long a5)
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{
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unsigned long ret;
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__asm__ __volatile__ ("int $128" : "=a"(ret) : "a"(n), "b"(a1), "c"(a2), "d"(a3), "S"(a4), "D"(a5) : "memory");
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return __syscall_ret(ret);
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}
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static inline long syscall6(long n, long a1, long a2, long a3, long a4, long a5, long a6)
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{
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unsigned long ret;
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__asm__ __volatile__ ("pushl %%ebp ; mov %%eax,%%ebp ; movl %1,%%eax ; int $128 ; popl %%ebp"
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: "=a"(ret) : "i"(n), "b"(a1), "c"(a2), "d"(a3), "S"(a4), "D"(a5), "a"(a6) : "memory");
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return __syscall_ret(ret);
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}
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#else
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static inline long syscall1(long n, long a1)
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{
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unsigned long ret;
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__asm__ __volatile__ ("xchg %2,%%ebx ; int $128 ; xchg %2,%%ebx"
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: "=a"(ret) : "a"(n), "r"(a1) : "memory");
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return __syscall_ret(ret);
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}
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static inline long syscall2(long n, long a1, long a2)
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{
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unsigned long ret;
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__asm__ __volatile__ ("xchg %2,%%ebx ; int $128 ; xchg %2,%%ebx"
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: "=a"(ret) : "a"(n), "r"(a1), "c"(a2) : "memory");
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return __syscall_ret(ret);
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}
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static inline long syscall3(long n, long a1, long a2, long a3)
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{
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unsigned long ret;
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__asm__ __volatile__ ("xchg %2,%%ebx ; int $128 ; xchg %2,%%ebx"
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: "=a"(ret) : "a"(n), "r"(a1), "c"(a2), "d"(a3) : "memory");
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return __syscall_ret(ret);
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}
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static inline long syscall4(long n, long a1, long a2, long a3, long a4)
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{
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unsigned long ret;
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__asm__ __volatile__ ("xchg %2,%%ebx ; int $128 ; xchg %2,%%ebx"
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: "=a"(ret) : "a"(n), "r"(a1), "c"(a2), "d"(a3), "S"(a4) : "memory");
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return __syscall_ret(ret);
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}
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static inline long syscall5(long n, long a1, long a2, long a3, long a4, long a5)
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{
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unsigned long ret;
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__asm__ __volatile__ ("pushl %%ebx ; mov %%eax,%%ebx ; movl %1,%%eax ; int $128 ; popl %%ebx"
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: "=a"(ret) : "i"(n), "a"(a1), "c"(a2), "d"(a3), "S"(a4), "D"(a5) : "memory");
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return __syscall_ret(ret);
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}
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#define syscall6(n,a1,a2,a3,a4,a5,a6) __syscall((n),(a1),(a2),(a3),(a4),(a5),(a6))
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#endif
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#define __SC_socket 1
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#define __SC_bind 2
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#define __SC_connect 3
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#define __SC_listen 4
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#define __SC_accept 5
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#define __SC_getsockname 6
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#define __SC_getpeername 7
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#define __SC_socketpair 8
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#define __SC_send 9
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#define __SC_recv 10
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#define __SC_sendto 11
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#define __SC_recvfrom 12
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#define __SC_shutdown 13
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#define __SC_setsockopt 14
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#define __SC_getsockopt 15
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#define __SC_sendmsg 16
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#define __SC_recvmsg 17
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#define socketcall(nm, a, b, c, d, e, f) syscall2(__NR_socketcall, __SC_##nm, \
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(long)(long [6]){ (long)a, (long)b, (long)c, (long)d, (long)e, (long)f })
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#undef O_LARGEFILE
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#define O_LARGEFILE 0100000
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/* the following are needed for iso c functions to use */
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#define __syscall_open(filename, flags, mode) syscall3(__NR_open, (long)(filename), (flags)|O_LARGEFILE, (mode))
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#define __syscall_read(fd, buf, len) syscall3(__NR_read, (fd), (long)(buf), (len))
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#define __syscall_write(fd, buf, len) syscall3(__NR_write, (fd), (long)(buf), (len))
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#define __syscall_close(fd) syscall1(__NR_close, (fd))
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#define __syscall_fcntl(fd, cmd, arg) syscall3(__NR_fcntl64, (fd), (cmd), (long)(arg))
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#define __syscall_dup2(old, new) syscall2(__NR_dup2, (old), (new))
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#define __syscall_unlink(path) syscall1(__NR_unlink, (long)(path))
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#define __syscall_getpid() syscall0(__NR_getpid)
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#define __syscall_kill(pid,sig) syscall2(__NR_kill, (pid), (sig))
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#define __syscall_sigaction(sig,new,old) syscall4(__NR_rt_sigaction, (sig), (long)(new), (long)(old), SYSCALL_SIGSET_SIZE)
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#define __syscall_ioctl(fd,ioc,arg) syscall3(__NR_ioctl, (fd), (ioc), (long)(arg))
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#define __syscall_exit(code) syscall1(__NR_exit, code)
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long __syscall(long, ...);
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#endif
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@ -14,12 +14,15 @@
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#define O_NOFOLLOW 0400000
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#define O_CLOEXEC 02000000
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#ifdef _GNU_SOURCE
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#define O_NDELAY O_NONBLOCK
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/* Extensions, but in the reserved namespace, so OK */
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#define O_ASYNC 020000
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#define O_DIRECT 040000
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#define O_LARGEFILE 0
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#define O_NOATIME 01000000
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#define O_NDELAY O_NONBLOCK
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#define F_DUPFD_CLOEXEC 1030
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#ifdef _GNU_SOURCE
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#define FAPPENT O_APPEND
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#define FFSYNC O_FSYNC
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#define FASYNC O_ASYNC
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@ -1,3 +1,67 @@
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#define __SYSCALL_LL(x) (x)
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static inline long __syscall0(long __n)
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{
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unsigned long __ret;
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__asm__ __volatile__ ("syscall" : "=a"(__ret) : "a"(__n) : "rcx", "r11", "memory");
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return __ret;
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}
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static inline long __syscall1(long __n, long __a1)
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{
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unsigned long __ret;
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__asm__ __volatile__ ("syscall" : "=a"(__ret) : "a"(__n), "D"(__a1) : "rcx", "r11", "memory");
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return __ret;
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}
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static inline long __syscall2(long __n, long __a1, long __a2)
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{
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unsigned long __ret;
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__asm__ __volatile__ ("syscall" : "=a"(__ret) : "a"(__n), "D"(__a1), "S"(__a2)
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: "rcx", "r11", "memory");
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return __ret;
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}
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static inline long __syscall3(long __n, long __a1, long __a2, long __a3)
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{
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unsigned long __ret;
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__asm__ __volatile__ ("syscall" : "=a"(__ret) : "a"(__n), "D"(__a1), "S"(__a2),
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"d"(__a3) : "rcx", "r11", "memory");
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return __ret;
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}
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static inline long __syscall4(long __n, long __a1, long __a2, long __a3, long __a4)
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{
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unsigned long __ret;
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register long __r10 __asm__("r10") = __a4;
|
||||
__asm__ __volatile__ ("syscall" : "=a"(__ret) : "a"(__n), "D"(__a1), "S"(__a2),
|
||||
"d"(__a3), "r"(__r10): "rcx", "r11", "memory");
|
||||
return __ret;
|
||||
}
|
||||
|
||||
static inline long __syscall5(long __n, long __a1, long __a2, long __a3, long __a4, long __a5)
|
||||
{
|
||||
unsigned long __ret;
|
||||
register long __r10 __asm__("r10") = __a4;
|
||||
register long__ r8 __asm__("r8") = __a5;
|
||||
__asm__ __volatile__ ("syscall" : "=a"(__ret) : "a"(__n), "D"(__a1), "S"(__a2),
|
||||
"d"(__a3), "r"(__r10), "r"(__r8) : "rcx", "r11", "memory");
|
||||
return __ret;
|
||||
}
|
||||
|
||||
static inline long __syscall6(long __n, long __a1, long __a2, long __a3, long __a4, long __a5, long __a6)
|
||||
{
|
||||
unsigned long __ret;
|
||||
register long __r10 __asm__("r10") = __a4;
|
||||
register long __r8 __asm__("r8") = __a5;
|
||||
register long __r9 __asm__("r9") = __a6;
|
||||
__asm__ __volatile__ ("syscall" : "=a"(__ret) : "a"(__n), "D"(__a1), "S"(__a2),
|
||||
"d"(__a3), "r"(__r10), "r"(__r8), "r"(__r9) : "rcx", "r11", "memory");
|
||||
return __ret;
|
||||
}
|
||||
|
||||
#define __socketcall(nm, a, b, c, d, e, f) syscall(__NR_##nm, a, b, c, d, e, f)
|
||||
|
||||
#define __NR_read 0
|
||||
#define __NR_write 1
|
||||
#define __NR_open 2
|
||||
|
|
|
|||
|
|
@ -1,113 +0,0 @@
|
|||
#ifndef _SYSCALL_H
|
||||
#define _SYSCALL_H
|
||||
|
||||
#include <sys/syscall.h>
|
||||
|
||||
#define SYSCALL_LL(x) x, 0
|
||||
#define SYSCALL_SIGSET_SIZE 8
|
||||
|
||||
#if defined(SYSCALL_NORETURN)
|
||||
static inline long __syscall_ret(unsigned long r)
|
||||
{
|
||||
for(;;);
|
||||
return 0;
|
||||
}
|
||||
#elif defined(SYSCALL_RETURN_ERRNO)
|
||||
static inline long __syscall_ret(unsigned long r)
|
||||
{
|
||||
return -r;
|
||||
}
|
||||
#else
|
||||
extern long __syscall_ret(unsigned long);
|
||||
#endif
|
||||
|
||||
// 64: di, si, dx, r10, r8, r9
|
||||
// 32: ebx, ecx, edx, esi, edi, ebp
|
||||
|
||||
#define SYSCALL "syscall"
|
||||
|
||||
static inline long syscall0(long n)
|
||||
{
|
||||
unsigned long ret;
|
||||
__asm__ __volatile__ (SYSCALL : "=a"(ret) : "a"(n) : "rcx", "r11", "memory");
|
||||
return __syscall_ret(ret);
|
||||
}
|
||||
|
||||
static inline long syscall1(long n, long a1)
|
||||
{
|
||||
unsigned long ret;
|
||||
__asm__ __volatile__ (SYSCALL : "=a"(ret) : "a"(n), "D"(a1) : "rcx", "r11", "memory");
|
||||
return __syscall_ret(ret);
|
||||
}
|
||||
|
||||
static inline long syscall2(long n, long a1, long a2)
|
||||
{
|
||||
unsigned long ret;
|
||||
__asm__ __volatile__ (SYSCALL : "=a"(ret) : "a"(n), "D"(a1), "S"(a2)
|
||||
: "rcx", "r11", "memory");
|
||||
return __syscall_ret(ret);
|
||||
}
|
||||
|
||||
static inline long syscall3(long n, long a1, long a2, long a3)
|
||||
{
|
||||
unsigned long ret;
|
||||
__asm__ __volatile__ (SYSCALL : "=a"(ret) : "a"(n), "D"(a1), "S"(a2),
|
||||
"d"(a3) : "rcx", "r11", "memory");
|
||||
return __syscall_ret(ret);
|
||||
}
|
||||
|
||||
static inline long syscall4(long n, long a1, long a2, long a3, long a4)
|
||||
{
|
||||
unsigned long ret;
|
||||
register long r10 __asm__("r10") = a4;
|
||||
__asm__ __volatile__ (SYSCALL : "=a"(ret) : "a"(n), "D"(a1), "S"(a2),
|
||||
"d"(a3), "r"(r10): "rcx", "r11", "memory");
|
||||
return __syscall_ret(ret);
|
||||
}
|
||||
|
||||
static inline long syscall5(long n, long a1, long a2, long a3, long a4,
|
||||
long a5)
|
||||
{
|
||||
unsigned long ret;
|
||||
register long r10 __asm__("r10") = a4;
|
||||
register long r8 __asm__("r8") = a5;
|
||||
__asm__ __volatile__ (SYSCALL : "=a"(ret) : "a"(n), "D"(a1), "S"(a2),
|
||||
"d"(a3), "r"(r10), "r"(r8) : "rcx", "r11", "memory");
|
||||
return __syscall_ret(ret);
|
||||
}
|
||||
|
||||
static inline long syscall6(long n, long a1, long a2, long a3, long a4,
|
||||
long a5, long a6)
|
||||
{
|
||||
unsigned long ret;
|
||||
register long r10 __asm__("r10") = a4;
|
||||
register long r8 __asm__("r8") = a5;
|
||||
register long r9 __asm__("r9") = a6;
|
||||
__asm__ __volatile__ (SYSCALL : "=a"(ret) : "a"(n), "D"(a1), "S"(a2),
|
||||
"d"(a3), "r"(r10), "r"(r8), "r"(r9) : "rcx", "r11", "memory");
|
||||
return __syscall_ret(ret);
|
||||
}
|
||||
|
||||
#undef O_LARGEFILE
|
||||
#define O_LARGEFILE 0100000
|
||||
|
||||
#define socketcall(nm, a, b, c, d, e, f) syscall6(__NR_##nm, \
|
||||
(long)a, (long)b, (long)c, (long)d, (long)e, (long)f)
|
||||
|
||||
/* the following are needed for iso c functions to use */
|
||||
#define __syscall_open(filename, flags, mode) syscall3(__NR_open, (long)(filename), (flags)|O_LARGEFILE, (mode))
|
||||
#define __syscall_read(fd, buf, len) syscall3(__NR_read, (fd), (long)(buf), (len))
|
||||
#define __syscall_write(fd, buf, len) syscall3(__NR_write, (fd), (long)(buf), (len))
|
||||
#define __syscall_close(fd) syscall1(__NR_close, (fd))
|
||||
#define __syscall_fcntl(fd, cmd, arg) syscall3(__NR_fcntl, (fd), (cmd), (long)(arg))
|
||||
#define __syscall_dup2(old, new) syscall2(__NR_dup2, (old), (new))
|
||||
#define __syscall_unlink(path) syscall1(__NR_unlink, (long)(path))
|
||||
#define __syscall_getpid() syscall0(__NR_getpid)
|
||||
#define __syscall_kill(pid,sig) syscall2(__NR_kill, (pid), (sig))
|
||||
#define __syscall_sigaction(sig,new,old) syscall4(__NR_rt_sigaction, (sig), (long)(new), (long)(old), SYSCALL_SIGSET_SIZE)
|
||||
#define __syscall_ioctl(fd,ioc,arg) syscall3(__NR_ioctl, (fd), (ioc), (long)(arg))
|
||||
#define __syscall_exit(code) syscall1(__NR_exit, code)
|
||||
|
||||
long __syscall(long, ...);
|
||||
|
||||
#endif
|
||||
Loading…
Add table
Add a link
Reference in a new issue