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linux-user: fix emulation of getdents

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In case when TARGET_ABI_BITS == 32 && HOST_LONG_BITS == 64, the last
byte of the target dirent structure (aka d_type byte) was never copied
from the host dirent structure, thus breaking everything that relies
on valid d_type value, e.g. glob(3).

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
This commit is contained in:
Dmitry V. Levin 2012-08-21 02:13:12 +04:00 committed by Riku Voipio
parent 42644cee08
commit 333858b77c
2 changed files with 9 additions and 10 deletions
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11
linux-user/syscall.c
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@ -7025,15 +7025,14 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
tde = target_dirp;
while (len > 0) {
reclen = de->d_reclen;
treclen = reclen - (2 * (sizeof(long) - sizeof(abi_long)));
tnamelen = reclen - offsetof(struct linux_dirent, d_name);
assert(tnamelen >= 0);
treclen = tnamelen + offsetof(struct target_dirent, d_name);
assert(count1 + treclen <= count);
tde->d_reclen = tswap16(treclen);
tde->d_ino = tswapal(de->d_ino);
tde->d_off = tswapal(de->d_off);
tnamelen = treclen - (2 * sizeof(abi_long) + 2);
if (tnamelen > 256)
tnamelen = 256;
/* XXX: may not be correct */
pstrcpy(tde->d_name, tnamelen, de->d_name);
memcpy(tde->d_name, de->d_name, tnamelen);
de = (struct linux_dirent *)((char *)de + reclen);
len -= reclen;
tde = (struct target_dirent *)((char *)tde + treclen);

8
linux-user/syscall_defs.h
View File

@ -255,10 +255,10 @@ struct kernel_statfs {
};
struct target_dirent {
abi_long d_ino;
abi_long d_off;
unsigned short d_reclen;
char d_name[256]; /* We must not include limits.h! */
abi_long d_ino;
abi_long d_off;
unsigned short d_reclen;
char d_name[];
};
struct target_dirent64 {