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

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3225 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
ths 2007-09-24 09:26:10 +00:00
parent f0b6243d5d
commit 5e0ccb18da
1 changed files with 27 additions and 0 deletions
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27
linux-user/syscall.c
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@ -147,6 +147,7 @@ type name (type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5,type6 arg6) \
#define __NR_sys_mkdirat __NR_mkdirat
#define __NR_sys_mknodat __NR_mknodat
#define __NR_sys_openat __NR_openat
#define __NR_sys_readlinkat __NR_readlinkat
#define __NR_sys_renameat __NR_renameat
#define __NR_sys_rt_sigqueueinfo __NR_rt_sigqueueinfo
#define __NR_sys_symlinkat __NR_symlinkat
@ -192,6 +193,10 @@ _syscall4(int,sys_mknodat,int,dirfd,const char *,pathname,
#if defined(TARGET_NR_openat) && defined(__NR_openat)
_syscall4(int,sys_openat,int,dirfd,const char *,pathname,int,flags,mode_t,mode)
#endif
#if defined(TARGET_NR_readlinkat) && defined(__NR_readlinkat)
_syscall4(int,sys_readlinkat,int,dirfd,const char *,pathname,
char *,buf,size_t,bufsize)
#endif
#if defined(TARGET_NR_renameat) && defined(__NR_renameat)
_syscall4(int,sys_renameat,int,olddirfd,const char *,oldpath,
int,newdirfd,const char *,newpath)
@ -3402,6 +3407,28 @@ long do_syscall(void *cpu_env, int num, long arg1, long arg2, long arg3,
unlock_user(p, arg1, 0);
}
break;
#if defined(TARGET_NR_readlinkat) && defined(__NR_readlinkat)
case TARGET_NR_readlinkat:
if (!arg2 || !arg3) {
ret = -EFAULT;
goto fail;
}
{
void *p2 = NULL;
p = lock_user_string(arg2);
p2 = lock_user(arg3, arg4, 0);
if (!access_ok(VERIFY_READ, p, 1)
|| !access_ok(VERIFY_READ, p2, 1))
ret = -EFAULT;
else
ret = get_errno(sys_readlinkat(arg1, path(p), p2, arg4));
if (p2)
unlock_user(p2, arg3, ret);
if (p)
unlock_user(p, arg2, 0);
}
break;
#endif
#ifdef TARGET_NR_uselib
case TARGET_NR_uselib:
goto unimplemented;