mii/qemu
1
0
Fork 0
mirror of https://github.com/mii443/qemu.git synced 2025-08-31 03:19:27 +00:00
Code Issues Packages Projects Releases Wiki Activity

tcg: Record code_gen_buffer address for user-only memory helpers

Browse Source 
When we handle a signal from a fault within a user-only memory helper,
we cannot cpu_restore_state with the PC found within the signal frame.
Use a TLS variable, helper_retaddr, to record the unwind start point
to find the faulting guest insn.

Tested-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reported-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson
2017-11-14 10:34:20 +01:00
parent 1fa0f627d0
commit ec603b5584
5 changed files with 87 additions and 20 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
include/exec/cpu_ldst.h
View File

@ -76,6 +76,8 @@
#if defined(CONFIG_USER_ONLY)
extern __thread uintptr_t helper_retaddr;
/* In user-only mode we provide only the _code and _data accessors. */
#define MEMSUFFIX _data