diff options
Diffstat (limited to 'linux-user/syscall.c')
| -rw-r--r-- | linux-user/syscall.c | 61 |
1 files changed, 60 insertions, 1 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c index 0099d64a9c..4151c78622 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -223,8 +223,11 @@ static int gettid(void) { return -ENOSYS; } #endif +#ifdef __NR_getdents _syscall3(int, sys_getdents, uint, fd, struct linux_dirent *, dirp, uint, count); -#if defined(TARGET_NR_getdents64) && defined(__NR_getdents64) +#endif +#if !defined(__NR_getdents) || \ + (defined(TARGET_NR_getdents64) && defined(__NR_getdents64)) _syscall3(int, sys_getdents64, uint, fd, struct linux_dirent64 *, dirp, uint, count); #endif #if defined(TARGET_NR__llseek) && defined(__NR_llseek) @@ -7123,6 +7126,7 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, break; #endif case TARGET_NR_getdents: +#ifdef __NR_getdents #if TARGET_ABI_BITS == 32 && HOST_LONG_BITS == 64 { struct target_dirent *target_dirp; @@ -7195,6 +7199,61 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, unlock_user(dirp, arg2, ret); } #endif +#else + /* Implement getdents in terms of getdents64 */ + { + struct linux_dirent64 *dirp; + abi_long count = arg3; + + dirp = lock_user(VERIFY_WRITE, arg2, count, 0); + if (!dirp) { + goto efault; + } + ret = get_errno(sys_getdents64(arg1, dirp, count)); + if (!is_error(ret)) { + /* Convert the dirent64 structs to target dirent. We do this + * in-place, since we can guarantee that a target_dirent is no + * larger than a dirent64; however this means we have to be + * careful to read everything before writing in the new format. + */ + struct linux_dirent64 *de; + struct target_dirent *tde; + int len = ret; + int tlen = 0; + + de = dirp; + tde = (struct target_dirent *)dirp; + while (len > 0) { + int namelen, treclen; + int reclen = de->d_reclen; + uint64_t ino = de->d_ino; + int64_t off = de->d_off; + uint8_t type = de->d_type; + + namelen = strlen(de->d_name); + treclen = offsetof(struct target_dirent, d_name) + + namelen + 2; + treclen = QEMU_ALIGN_UP(treclen, sizeof(abi_long)); + + memmove(tde->d_name, de->d_name, namelen + 1); + tde->d_ino = tswapal(ino); + tde->d_off = tswapal(off); + tde->d_reclen = tswap16(treclen); + /* The target_dirent type is in what was formerly a padding + * byte at the end of the structure: + */ + *(((char *)tde) + treclen - 1) = type; + + de = (struct linux_dirent64 *)((char *)de + reclen); + tde = (struct target_dirent *)((char *)tde + treclen); + len -= reclen; + tlen += treclen; + } + ret = tlen; + } + unlock_user(dirp, arg2, ret); + } +#endif break; #if defined(TARGET_NR_getdents64) && defined(__NR_getdents64) case TARGET_NR_getdents64: |