gwj / at91sam9263 · Commits

Commit 5e0ccb18da28cc9fdac725ef41a7c174125b56ac

Authored by ths
1 parent f0b6243d

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


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3225 c046a42c-6fe2-441c-8c8c-71466251a162
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Showing 1 changed file with 27 additions and 0 deletions
linux-user/syscall.c
  View file @5e0ccb1
... ... @@ -147,6 +147,7 @@ type name (type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5,type6 arg6) \
147 147 #define __NR_sys_mkdirat __NR_mkdirat
148 148 #define __NR_sys_mknodat __NR_mknodat
149 149 #define __NR_sys_openat __NR_openat
  150 +#define __NR_sys_readlinkat __NR_readlinkat
150 151 #define __NR_sys_renameat __NR_renameat
151 152 #define __NR_sys_rt_sigqueueinfo __NR_rt_sigqueueinfo
152 153 #define __NR_sys_symlinkat __NR_symlinkat
... ... @@ -192,6 +193,10 @@ _syscall4(int,sys_mknodat,int,dirfd,const char *,pathname,
192 193 #if defined(TARGET_NR_openat) && defined(__NR_openat)
193 194 _syscall4(int,sys_openat,int,dirfd,const char *,pathname,int,flags,mode_t,mode)
194 195 #endif
  196 +#if defined(TARGET_NR_readlinkat) && defined(__NR_readlinkat)
  197 +_syscall4(int,sys_readlinkat,int,dirfd,const char *,pathname,
  198 + char *,buf,size_t,bufsize)
  199 +#endif
195 200 #if defined(TARGET_NR_renameat) && defined(__NR_renameat)
196 201 _syscall4(int,sys_renameat,int,olddirfd,const char *,oldpath,
197 202 int,newdirfd,const char *,newpath)
... ... @@ -3402,6 +3407,28 @@ long do_syscall(void *cpu_env, int num, long arg1, long arg2, long arg3,
3402 3407 unlock_user(p, arg1, 0);
3403 3408 }
3404 3409 break;
  3410 +#if defined(TARGET_NR_readlinkat) && defined(__NR_readlinkat)
  3411 + case TARGET_NR_readlinkat:
  3412 + if (!arg2 || !arg3) {
  3413 + ret = -EFAULT;
  3414 + goto fail;
  3415 + }
  3416 + {
  3417 + void *p2 = NULL;
  3418 + p = lock_user_string(arg2);
  3419 + p2 = lock_user(arg3, arg4, 0);
  3420 + if (!access_ok(VERIFY_READ, p, 1)
  3421 + || !access_ok(VERIFY_READ, p2, 1))
  3422 + ret = -EFAULT;
  3423 + else
  3424 + ret = get_errno(sys_readlinkat(arg1, path(p), p2, arg4));
  3425 + if (p2)
  3426 + unlock_user(p2, arg3, ret);
  3427 + if (p)
  3428 + unlock_user(p, arg2, 0);
  3429 + }
  3430 + break;
  3431 +#endif
3405 3432 #ifdef TARGET_NR_uselib
3406 3433 case TARGET_NR_uselib:
3407 3434 goto unimplemented;
... ...