| Message ID | 20240329063148.129343-1-jcmvbkbc@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | linux-user/syscall: xtensa: fix target_msqid_ds and ipc_perm conversion | expand |
Hi Max, On 29/3/24 07:31, Max Filippov wrote: > - target_ipc_perm::mode and target_ipc_perm::__seq fields are 32-bit wide > on xtensa and thus need to use tswap32 > - target_msqid_ds::msg_*time field pairs are reversed on big-endian > xtensa Please split in 2 distinct patches. > Both issues result in incorrect conversion results on big-endian xtensa > targets, spotted by the libc-test http://nsz.repo.hu/git/?p=libc-test > > Cc: qemu-stable@nongnu.org > Fixes: a3da8be5126b ("target/xtensa: linux-user: fix sysv IPC structures") > Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> > --- > linux-user/syscall.c | 19 +++++++++++++++---- > 1 file changed, 15 insertions(+), 4 deletions(-) > > diff --git a/linux-user/syscall.c b/linux-user/syscall.c > index e384e1424890..cb334e90d6f0 100644 > --- a/linux-user/syscall.c > +++ b/linux-user/syscall.c > @@ -3758,12 +3758,13 @@ static inline abi_long target_to_host_ipc_perm(struct ipc_perm *host_ip, > host_ip->gid = tswap32(target_ip->gid); > host_ip->cuid = tswap32(target_ip->cuid); > host_ip->cgid = tswap32(target_ip->cgid); > -#if defined(TARGET_ALPHA) || defined(TARGET_MIPS) || defined(TARGET_PPC) > +#if defined(TARGET_ALPHA) || defined(TARGET_MIPS) || defined(TARGET_PPC) || \ > + defined(TARGET_XTENSA) > host_ip->mode = tswap32(target_ip->mode); > #else > host_ip->mode = tswap16(target_ip->mode); > #endif > -#if defined(TARGET_PPC) > +#if defined(TARGET_PPC) || defined(TARGET_XTENSA) > host_ip->__seq = tswap32(target_ip->__seq); > #else > host_ip->__seq = tswap16(target_ip->__seq); > @@ -3786,12 +3787,13 @@ static inline abi_long host_to_target_ipc_perm(abi_ulong target_addr, > target_ip->gid = tswap32(host_ip->gid); > target_ip->cuid = tswap32(host_ip->cuid); > target_ip->cgid = tswap32(host_ip->cgid); > -#if defined(TARGET_ALPHA) || defined(TARGET_MIPS) || defined(TARGET_PPC) > +#if defined(TARGET_ALPHA) || defined(TARGET_MIPS) || defined(TARGET_PPC) || \ > + defined(TARGET_XTENSA) > target_ip->mode = tswap32(host_ip->mode); > #else > target_ip->mode = tswap16(host_ip->mode); > #endif > -#if defined(TARGET_PPC) > +#if defined(TARGET_PPC) || defined(TARGET_XTENSA) > target_ip->__seq = tswap32(host_ip->__seq); > #else > target_ip->__seq = tswap16(host_ip->__seq); > @@ -4111,6 +4113,14 @@ static inline abi_long do_semtimedop(int semid, > struct target_msqid_ds > { > struct target_ipc_perm msg_perm; > +#if defined(TARGET_XTENSA) && TARGET_BIG_ENDIAN Why restrict to only Xtensa here? > + abi_ulong __unused1; > + abi_ulong msg_stime; > + abi_ulong __unused2; > + abi_ulong msg_rtime; > + abi_ulong __unused3; > + abi_ulong msg_ctime; > +#else > abi_ulong msg_stime; > #if TARGET_ABI_BITS == 32 > abi_ulong __unused1; > @@ -4122,6 +4132,7 @@ struct target_msqid_ds > abi_ulong msg_ctime; > #if TARGET_ABI_BITS == 32 > abi_ulong __unused3; > +#endif > #endif > abi_ulong __msg_cbytes; > abi_ulong msg_qnum;
On Fri, Mar 29, 2024 at 5:48 AM Philippe Mathieu-Daudé <philmd@linaro.org> wrote: > > Hi Max, > > On 29/3/24 07:31, Max Filippov wrote: > > - target_ipc_perm::mode and target_ipc_perm::__seq fields are 32-bit wide > > on xtensa and thus need to use tswap32 > > - target_msqid_ds::msg_*time field pairs are reversed on big-endian > > xtensa > > Please split in 2 distinct patches. Ok. > > struct target_msqid_ds > > { > > struct target_ipc_perm msg_perm; > > +#if defined(TARGET_XTENSA) && TARGET_BIG_ENDIAN > > Why restrict to only Xtensa here? I have detected and tested it on xtensa. I see other architectures (mips, parisc, ppc, sparc) that may need that, but AFAICS it's not that it's applicable for all big endians. > > + abi_ulong __unused1; > > + abi_ulong msg_stime; > > + abi_ulong __unused2; > > + abi_ulong msg_rtime; > > + abi_ulong __unused3; > > + abi_ulong msg_ctime; > > +#else
diff --git a/linux-user/syscall.c b/linux-user/syscall.c index e384e1424890..cb334e90d6f0 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -3758,12 +3758,13 @@ static inline abi_long target_to_host_ipc_perm(struct ipc_perm *host_ip, host_ip->gid = tswap32(target_ip->gid); host_ip->cuid = tswap32(target_ip->cuid); host_ip->cgid = tswap32(target_ip->cgid); -#if defined(TARGET_ALPHA) || defined(TARGET_MIPS) || defined(TARGET_PPC) +#if defined(TARGET_ALPHA) || defined(TARGET_MIPS) || defined(TARGET_PPC) || \ + defined(TARGET_XTENSA) host_ip->mode = tswap32(target_ip->mode); #else host_ip->mode = tswap16(target_ip->mode); #endif -#if defined(TARGET_PPC) +#if defined(TARGET_PPC) || defined(TARGET_XTENSA) host_ip->__seq = tswap32(target_ip->__seq); #else host_ip->__seq = tswap16(target_ip->__seq); @@ -3786,12 +3787,13 @@ static inline abi_long host_to_target_ipc_perm(abi_ulong target_addr, target_ip->gid = tswap32(host_ip->gid); target_ip->cuid = tswap32(host_ip->cuid); target_ip->cgid = tswap32(host_ip->cgid); -#if defined(TARGET_ALPHA) || defined(TARGET_MIPS) || defined(TARGET_PPC) +#if defined(TARGET_ALPHA) || defined(TARGET_MIPS) || defined(TARGET_PPC) || \ + defined(TARGET_XTENSA) target_ip->mode = tswap32(host_ip->mode); #else target_ip->mode = tswap16(host_ip->mode); #endif -#if defined(TARGET_PPC) +#if defined(TARGET_PPC) || defined(TARGET_XTENSA) target_ip->__seq = tswap32(host_ip->__seq); #else target_ip->__seq = tswap16(host_ip->__seq); @@ -4111,6 +4113,14 @@ static inline abi_long do_semtimedop(int semid, struct target_msqid_ds { struct target_ipc_perm msg_perm; +#if defined(TARGET_XTENSA) && TARGET_BIG_ENDIAN + abi_ulong __unused1; + abi_ulong msg_stime; + abi_ulong __unused2; + abi_ulong msg_rtime; + abi_ulong __unused3; + abi_ulong msg_ctime; +#else abi_ulong msg_stime; #if TARGET_ABI_BITS == 32 abi_ulong __unused1; @@ -4122,6 +4132,7 @@ struct target_msqid_ds abi_ulong msg_ctime; #if TARGET_ABI_BITS == 32 abi_ulong __unused3; +#endif #endif abi_ulong __msg_cbytes; abi_ulong msg_qnum;
- target_ipc_perm::mode and target_ipc_perm::__seq fields are 32-bit wide on xtensa and thus need to use tswap32 - target_msqid_ds::msg_*time field pairs are reversed on big-endian xtensa Both issues result in incorrect conversion results on big-endian xtensa targets, spotted by the libc-test http://nsz.repo.hu/git/?p=libc-test Cc: qemu-stable@nongnu.org Fixes: a3da8be5126b ("target/xtensa: linux-user: fix sysv IPC structures") Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> --- linux-user/syscall.c | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-)