gwj / at91sam9263 · Commits

Commit 64f0ce4c0d2c45ff69bfc09092649ee3674f6592

Authored by ths
1 parent 722183f6

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


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3223 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 @64f0ce4
... ... @@ -143,6 +143,7 @@ type name (type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5,type6 arg6) \
143 143 #define __NR_sys_getcwd1 __NR_getcwd
144 144 #define __NR_sys_getdents __NR_getdents
145 145 #define __NR_sys_getdents64 __NR_getdents64
  146 +#define __NR_sys_linkat __NR_linkat
146 147 #define __NR_sys_mkdirat __NR_mkdirat
147 148 #define __NR_sys_mknodat __NR_mknodat
148 149 #define __NR_sys_openat __NR_openat
... ... @@ -176,6 +177,10 @@ _syscall3(int, sys_getdents64, uint, fd, struct dirent64 *, dirp, uint, count);
176 177 #endif
177 178 _syscall5(int, _llseek, uint, fd, ulong, hi, ulong, lo,
178 179 loff_t *, res, uint, wh);
  180 +#if defined(TARGET_NR_linkat) && defined(__NR_linkat)
  181 +_syscall5(int,sys_linkat,int,olddirfd,const char *,oldpath,
  182 + int,newdirfd,const char *,newpath,int,flags)
  183 +#endif
179 184 #if defined(TARGET_NR_mkdirat) && defined(__NR_mkdirat)
180 185 _syscall3(int,sys_mkdirat,int,dirfd,const char *,pathname,mode_t,mode)
181 186 #endif
... ... @@ -2581,6 +2586,28 @@ long do_syscall(void *cpu_env, int num, long arg1, long arg2, long arg3,
2581 2586 unlock_user(p, arg1, 0);
2582 2587 }
2583 2588 break;
  2589 +#if defined(TARGET_NR_linkat) && defined(__NR_linkat)
  2590 + case TARGET_NR_linkat:
  2591 + if (!arg2 || !arg4) {
  2592 + ret = -EFAULT;
  2593 + goto fail;
  2594 + }
  2595 + {
  2596 + void * p2 = NULL;
  2597 + p = lock_user_string(arg2);
  2598 + p2 = lock_user_string(arg4);
  2599 + if (!access_ok(VERIFY_READ, p, 1)
  2600 + || !access_ok(VERIFY_READ, p2, 1))
  2601 + ret = -EFAULT;
  2602 + else
  2603 + ret = get_errno(sys_linkat(arg1, p, arg3, p2, arg5));
  2604 + if (p2)
  2605 + unlock_user(p, arg2, 0);
  2606 + if (p)
  2607 + unlock_user(p2, arg4, 0);
  2608 + }
  2609 + break;
  2610 +#endif
2584 2611 case TARGET_NR_unlink:
2585 2612 p = lock_user_string(arg1);
2586 2613 ret = get_errno(unlink(p));
... ...