ShuriZma
/
xemu
mirror of https://github.com/xemu-project/xemu.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Fix file offset for preadv/pwritev linux-user syscalls. 

-----BEGIN PGP SIGNATURE-----
 
 iQJHBAABCAAxFiEEK2eFS5jlMn3N6xfYUfnMkfg/oEQFAlrMG6gTHGpjbXZia2Jj
 QGdtYWlsLmNvbQAKCRBR+cyR+D+gRJe7D/9S8cCUW1kDWE9AkFgXgLljaQ/RbnAn
 wNwFbpe1w/EmrUXTHUZwEuky3IYdjkmhUUR4sRcE0z3RJY2B+4JAz8vB4BpG25dJ
 0e8SyC1HDWI8G3qLATs1S4sVN6ZBUdUjm2R9rDGAUc6tqVkJ0exn4dUD6Xdm2K6P
 vYhdGkI9WuXTPdnq3ZEEaEq1fEfWXff84hNVEr/QOP4vqm/Ycx2CMFWf543Ayog6
 5TKB5S3ucF1qt/HXRE1SgklDzTwo+FqUQTSjtdk1uGnIEo/3gydTntFdmRyWQg1+
 QKE5CPE0MT3gwgQc3PoEBKj0TmClv9qJHgSYgpM3PxfA52Q5+ccDv31U2kENUBgs
 PRqoB9Enrg7gvGhnhgbT7BcM/2eXcDOiANO4nniyneJb7Ua0JAGWS5q/B1QuZM/K
 hqFAiO/r3Fgq/lSX2hXyRq5sE8vBbqTUafA1ZVGcpmJJHfnguuCM19wSsEIA9l85
 pIEoZ5xDHSkFuZgY/r0JqilUtJKayUn4tScvMEQ8csXO1sryNO1nNrKprIXPXvgr
 ZclCHu2nE3L476oAqJfZNXca3e2WBXe51i4nwBsBGPl1CD2kEMXYU/BNfRAi08ae
 +Cv8UwUWIaCRhFE6ZT/oh46PszW16YpxUyPLJ8bZWhmPFWN0ofI1E6tBJeksav5e
 WwIeC/ygYG6njg==
 =rvKH
 -----END PGP SIGNATURE-----

Merge remote-tracking branch 'remotes/xtensa/tags/20180409-xtensa' into staging

Fix file offset for preadv/pwritev linux-user syscalls.

# gpg: Signature made Tue 10 Apr 2018 03:04:24 BST
# gpg:                using RSA key 51F9CC91F83FA044
# gpg: Good signature from "Max Filippov <filippov@cadence.com>"
# gpg:                 aka "Max Filippov <max.filippov@cogentembedded.com>"
# gpg:                 aka "Max Filippov <jcmvbkbc@gmail.com>"
# Primary key fingerprint: 2B67 854B 98E5 327D CDEB  17D8 51F9 CC91 F83F A044

* remotes/xtensa/tags/20180409-xtensa:
  linux-user: fix preadv/pwritev offsets

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2018-04-10 10:22:45 +01:00
parent 1e7e92e2ef 9ac225171c
commit fb4fe32d5b
1 changed files with 25 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
linux-user/syscall.c
View File

@ -3386,6 +3386,23 @@ static abi_long do_getsockopt(int sockfd, int level, int optname,
return ret;
}
/* Convert target low/high pair representing file offset into the host
* low/high pair. This function doesn't handle offsets bigger than 64 bits
* as the kernel doesn't handle them either.
*/
static void target_to_host_low_high(abi_ulong tlow,
abi_ulong thigh,
unsigned long *hlow,
unsigned long *hhigh)
{
uint64_t off = tlow |
((unsigned long long)thigh << TARGET_LONG_BITS / 2) <<
TARGET_LONG_BITS / 2;
*hlow = off;
*hhigh = (off >> HOST_LONG_BITS / 2) >> HOST_LONG_BITS / 2;
}
static struct iovec *lock_iovec(int type, abi_ulong target_addr,
abi_ulong count, int copy)
{
@ -10452,7 +10469,10 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
{
struct iovec *vec = lock_iovec(VERIFY_WRITE, arg2, arg3, 0);
if (vec != NULL) {
ret = get_errno(safe_preadv(arg1, vec, arg3, arg4, arg5));
unsigned long low, high;
target_to_host_low_high(arg4, arg5, &low, &high);
ret = get_errno(safe_preadv(arg1, vec, arg3, low, high));
unlock_iovec(vec, arg2, arg3, 1);
} else {
ret = -host_to_target_errno(errno);
@ -10465,7 +10485,10 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
{
struct iovec *vec = lock_iovec(VERIFY_READ, arg2, arg3, 1);
if (vec != NULL) {
ret = get_errno(safe_pwritev(arg1, vec, arg3, arg4, arg5));
unsigned long low, high;
target_to_host_low_high(arg4, arg5, &low, &high);
ret = get_errno(safe_pwritev(arg1, vec, arg3, low, high));
unlock_iovec(vec, arg2, arg3, 0);
} else {
ret = -host_to_target_errno(errno);