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cleaning up syscalls in preparation for x86_64 port

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- hide all the legacy xxxxxx32 name cruft in syscall.h so the actual
source files can be clean and uniform across all archs.

- cleanup llseek/lseek and mmap2/mmap handling for 32/64 bit systems

- alternate implementation for nice if the target lacks nice syscall
This commit is contained in:
Rich Felker
2011-02-13 22:45:42 -05:00
parent 978ca01659
commit 2cdfb7ca26
18 changed files with 79 additions and 37 deletions
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49
src/internal/syscall.h
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@ -439,6 +439,46 @@ static inline long syscall6(long n, long a1, long a2, long a3, long a4, long a5,
#define __NR_preadv 333
#define __NR_pwritev 334
/* fixup legacy 16-bit junk */
#undef __NR_lchown
#undef __NR_getuid
#undef __NR_getgid
#undef __NR_geteuid
#undef __NR_getegid
#undef __NR_setreuid
#undef __NR_setregid
#undef __NR_getgroups
#undef __NR_setgroups
#undef __NR_fchown
#undef __NR_setresuid
#undef __NR_getresuid
#undef __NR_setresgid
#undef __NR_getresgid
#undef __NR_chown
#undef __NR_setuid
#undef __NR_setgid
#undef __NR_setfsuid
#undef __NR_setfsgid
#define __NR_lchown __NR_lchown32
#define __NR_getuid __NR_getuid32
#define __NR_getgid __NR_getgid32
#define __NR_geteuid __NR_geteuid32
#define __NR_getegid __NR_getegid32
#define __NR_setreuid __NR_setreuid32
#define __NR_setregid __NR_setregid32
#define __NR_getgroups __NR_getgroups32
#define __NR_setgroups __NR_setgroups32
#define __NR_fchown __NR_fchown32
#define __NR_setresuid __NR_setresuid32
#define __NR_getresuid __NR_getresuid32
#define __NR_setresgid __NR_setresgid32
#define __NR_getresgid __NR_getresgid32
#define __NR_chown __NR_chown32
#define __NR_setuid __NR_setuid32
#define __NR_setgid __NR_setgid32
#define __NR_setfsuid __NR_setfsuid32
#define __NR_setfsgid __NR_setfsgid32
#undef O_LARGEFILE
#define O_LARGEFILE 0100000
@ -457,13 +497,4 @@ static inline long syscall6(long n, long a1, long a2, long a3, long a4, long a5,
#define __syscall_ioctl(fd,ioc,arg) syscall3(__NR_ioctl, (fd), (ioc), (long)(arg))
#define __syscall_exit(code) syscall1(__NR_exit, code)
#define __NEED_off_t
#include <bits/alltypes.h>
static inline off_t __syscall_lseek(int fd, off_t offset, int whence)
{
off_t result;
return syscall5(__NR__llseek, fd, offset>>32, offset, (long)&result, whence) ? -1 : result;
}
#endif