From: Ilya Leoshkevich <[email protected]>
The new noexec test fails on s390x with "unexpected SEGV". This test
overwrites code using libc's memcpy(), which uses VSTL instruction.
host_signal_write() does not recognize it, which causes SEGV to be
incorrectly forwarded to the test.
Add all vector instructions that write to memory to
host_signal_write().
Fixes: ab12c95d3f19 ("target/s390x: Make translator stop before the end of a
page")
Reported-by: Thomas Huth <[email protected]>
Signed-off-by: Ilya Leoshkevich <[email protected]>
Message-Id: <[email protected]>
Tested-by: Thomas Huth <[email protected]>
Signed-off-by: Thomas Huth <[email protected]>
---
linux-user/include/host/s390/host-signal.h | 25 ++++++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/linux-user/include/host/s390/host-signal.h
b/linux-user/include/host/s390/host-signal.h
index 25fefa00bd..e6d3ec26dc 100644
--- a/linux-user/include/host/s390/host-signal.h
+++ b/linux-user/include/host/s390/host-signal.h
@@ -87,6 +87,31 @@ static inline bool host_signal_write(siginfo_t *info,
host_sigcontext *uc)
return true;
}
break;
+ case 0xe6:
+ switch (pinsn[2] & 0xff) {
+ case 0x09: /* VSTEBRH */
+ case 0x0a: /* VSTEBRG */
+ case 0x0b: /* VSTEBRF */
+ case 0x0e: /* VSTBR */
+ case 0x0f: /* VSTER */
+ case 0x3f: /* VSTRLR */
+ return true;
+ }
+ break;
+ case 0xe7:
+ switch (pinsn[2] & 0xff) {
+ case 0x08: /* VSTEB */
+ case 0x09: /* VSTEH */
+ case 0x0a: /* VSTEG */
+ case 0x0b: /* VSTEF */
+ case 0x0e: /* VST */
+ case 0x1a: /* VSCEG */
+ case 0x1b: /* VSCEF */
+ case 0x3e: /* VSTM */
+ case 0x3f: /* VSTL */
+ return true;
+ }
+ break;
case 0xeb: /* RSY format insns */
switch (pinsn[2] & 0xff) {
case 0x14: /* CSY */
--
2.31.1
