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linux-user linkat() syscall, by Thayne Harbaugh.

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3223 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
ths 2007-09-24 09:25:06 +00:00
parent 722183f69b
commit 64f0ce4c0d
1 changed files with 27 additions and 0 deletions
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27
linux-user/syscall.c
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@ -143,6 +143,7 @@ type name (type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5,type6 arg6) \
#define __NR_sys_getcwd1 __NR_getcwd
#define __NR_sys_getdents __NR_getdents
#define __NR_sys_getdents64 __NR_getdents64
#define __NR_sys_linkat __NR_linkat
#define __NR_sys_mkdirat __NR_mkdirat
#define __NR_sys_mknodat __NR_mknodat
#define __NR_sys_openat __NR_openat
@ -176,6 +177,10 @@ _syscall3(int, sys_getdents64, uint, fd, struct dirent64 *, dirp, uint, count);
#endif
_syscall5(int, _llseek, uint, fd, ulong, hi, ulong, lo,
loff_t *, res, uint, wh);
#if defined(TARGET_NR_linkat) && defined(__NR_linkat)
_syscall5(int,sys_linkat,int,olddirfd,const char *,oldpath,
int,newdirfd,const char *,newpath,int,flags)
#endif
#if defined(TARGET_NR_mkdirat) && defined(__NR_mkdirat)
_syscall3(int,sys_mkdirat,int,dirfd,const char *,pathname,mode_t,mode)
#endif
@ -2581,6 +2586,28 @@ long do_syscall(void *cpu_env, int num, long arg1, long arg2, long arg3,
unlock_user(p, arg1, 0);
}
break;
#if defined(TARGET_NR_linkat) && defined(__NR_linkat)
case TARGET_NR_linkat:
if (!arg2 || !arg4) {
ret = -EFAULT;
goto fail;
}
{
void * p2 = NULL;
p = lock_user_string(arg2);
p2 = lock_user_string(arg4);
if (!access_ok(VERIFY_READ, p, 1)
|| !access_ok(VERIFY_READ, p2, 1))
ret = -EFAULT;
else
ret = get_errno(sys_linkat(arg1, p, arg3, p2, arg5));
if (p2)
unlock_user(p, arg2, 0);
if (p)
unlock_user(p2, arg4, 0);
}
break;
#endif
case TARGET_NR_unlink:
p = lock_user_string(arg1);
ret = get_errno(unlink(p));