mirrors/llvm-project
0
0
Fork 0
mirror of https://github.com/llvm/llvm-project.git synced 2025-04-16 19:56:38 +00:00
Code Issues Projects Releases Wiki Activity

[sanitizer] Add the settings of Read and Write flags in SignalContext for LoongArch

Browse Source 
The bit-30 in this `__flags` means the address error is due to memory load, and the
bit-31 means the address error is due to memory store. (see SC_ADDRERR_RD
and SC_ADDRERR_WR in kernel arch/loongarch/include/uapi/asm/sigcontext.h).

`illegal_write_test.cpp` and `illegal_read_test.cpp` have been tested and passed.

Reviewed By: SixWeining, xen0n, XiaodongLoong

Differential Revision: https://reviews.llvm.org/D137231
This commit is contained in:
Youling Tang 2022-11-10 13:34:19 +08:00 committed by Weining Lu
parent eae8d93dc2
commit 14cd113e69
1 changed files with 7 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
compiler-rt/lib/sanitizer_common/sanitizer_linux.cpp
View File

@ -1956,6 +1956,13 @@ SignalContext::WriteFlag SignalContext::GetWriteFlag() const {
u64 esr;
if (!Aarch64GetESR(ucontext, &esr)) return Unknown;
return esr & ESR_ELx_WNR ? Write : Read;
#elif defined(__loongarch__)
u32 flags = ucontext->uc_mcontext.__flags;
if (flags & SC_ADDRERR_RD)
return SignalContext::Read;
if (flags & SC_ADDRERR_WR)
return SignalContext::Write;
return SignalContext::Unknown;
#elif defined(__sparc__)
// Decode the instruction to determine the access type.
// From OpenSolaris $SRC/uts/sun4/os/trap.c (get_accesstype).