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| author | Andreas Krebbel <krebbel@linux.ibm.com> | 2021-03-24 19:51:28 +0100 |
|---|---|---|
| committer | Laurent Vivier <laurent@vivier.eu> | 2021-03-25 20:55:07 +0100 |
| commit | 23fff7a17f47420797ac6480147941612152a9ad (patch) | |
| tree | 7680122bb4901ffb6ea9efab43562970290bb5bf /linux-user/s390x | |
| parent | 9e2e9fe3df9f539f8b6941ceb96d25355fdae47e (diff) | |
| download | qemu-23fff7a17f47420797ac6480147941612152a9ad.zip qemu-23fff7a17f47420797ac6480147941612152a9ad.tar.gz qemu-23fff7a17f47420797ac6480147941612152a9ad.tar.bz2 | |
linux-user/s390x: Use the guest pointer for the sigreturn stub
When setting up the pointer for the sigreturn stub in the return
address register (r14) we currently use the host frame address instead
of the guest frame address.
Note: This only caused problems if Qemu has been built with
--disable-pie (as it is in distros nowadays). Otherwise guest_base
defaults to 0 hiding the actual problem.
Signed-off-by: Andreas Krebbel <krebbel@linux.ibm.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20210324185128.63971-1-krebbel@linux.ibm.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Diffstat (limited to 'linux-user/s390x')
| -rw-r--r-- | linux-user/s390x/signal.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/linux-user/s390x/signal.c b/linux-user/s390x/signal.c index ecfa2a1..7107c5f 100644 --- a/linux-user/s390x/signal.c +++ b/linux-user/s390x/signal.c @@ -211,9 +211,10 @@ void setup_rt_frame(int sig, struct target_sigaction *ka, /* Set up to return from userspace. If provided, use a stub already in userspace. */ if (ka->sa_flags & TARGET_SA_RESTORER) { - env->regs[14] = (unsigned long) ka->sa_restorer | PSW_ADDR_AMODE; + env->regs[14] = ka->sa_restorer | PSW_ADDR_AMODE; } else { - env->regs[14] = (unsigned long) frame->retcode | PSW_ADDR_AMODE; + env->regs[14] = (frame_addr + offsetof(typeof(*frame), retcode)) + | PSW_ADDR_AMODE; __put_user(S390_SYSCALL_OPCODE | TARGET_NR_rt_sigreturn, (uint16_t *)(frame->retcode)); } |