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| author | Aleksandar Beserminji <abeserminji@wavecomp.com> | 2018-10-16 08:27:28 +0000 |
|---|---|---|
| committer | Aleksandar Beserminji <abeserminji@wavecomp.com> | 2018-10-16 08:27:28 +0000 |
| commit | a5949439ca6adbb3b19dbd599880ff5b239f964e (patch) | |
| tree | 4be20376f56b291b1647ab57a8e16915b42beb28 /llvm/test/CodeGen/Mips | |
| parent | 8d56be707038f99cf4e387c2a9390d39bea287cc (diff) | |
| download | bcm5719-llvm-a5949439ca6adbb3b19dbd599880ff5b239f964e.tar.gz bcm5719-llvm-a5949439ca6adbb3b19dbd599880ff5b239f964e.zip | |
[mips][micromips] Fix how values in .gcc_except_table are calculated
When a landing pad is calculated in a program that is compiled
for micromips, it will point to an even address. Such an error will
cause a segmentation fault, as the instructions in micromips are
aligned on odd addresses. This patch sets the last bit of the offset
where a landing pad is, to 1, which will effectively be
an odd address and point to the instruction exactly.
Differential Revision: https://reviews.llvm.org/D52985
llvm-svn: 344591
Diffstat (limited to 'llvm/test/CodeGen/Mips')
| -rw-r--r-- | llvm/test/CodeGen/Mips/micromips-gcc-except-table.ll | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/Mips/micromips-gcc-except-table.ll b/llvm/test/CodeGen/Mips/micromips-gcc-except-table.ll new file mode 100644 index 00000000000..38a76927e2a --- /dev/null +++ b/llvm/test/CodeGen/Mips/micromips-gcc-except-table.ll @@ -0,0 +1,37 @@ +; RUN: llc -mtriple=mips-linux-gnu -mcpu=mips32r2 -mattr=+micromips -O3 -filetype=obj < %s | llvm-objdump -s -j .gcc_except_table - | FileCheck %s + +; CHECK: Contents of section .gcc_except_table: +; CHECK-NEXT: 0000 ff9b1501 0c011100 00110e1f 011f1800 +; CHECK-NEXT: 0010 00010000 00000000 + +@_ZTIi = external constant i8* + +define dso_local i32 @main() local_unnamed_addr norecurse personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) { +entry: + %exception.i = tail call i8* @__cxa_allocate_exception(i32 4) nounwind + %0 = bitcast i8* %exception.i to i32* + store i32 5, i32* %0, align 16 + invoke void @__cxa_throw(i8* %exception.i, i8* bitcast (i8** @_ZTIi to i8*), i8* null) noreturn + to label %.noexc unwind label %return + +.noexc: + unreachable + +return: + %1 = landingpad { i8*, i32 } + catch i8* null + %2 = extractvalue { i8*, i32 } %1, 0 + %3 = tail call i8* @__cxa_begin_catch(i8* %2) nounwind + tail call void @__cxa_end_catch() + ret i32 0 +} + +declare i32 @__gxx_personality_v0(...) + +declare i8* @__cxa_begin_catch(i8*) local_unnamed_addr + +declare void @__cxa_end_catch() local_unnamed_addr + +declare i8* @__cxa_allocate_exception(i32) local_unnamed_addr + +declare void @__cxa_throw(i8*, i8*, i8*) local_unnamed_addr |
