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ARMEB: Fix byte order of EH frame unwinding instructions

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208689 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Christian Pirker
2014-05-13 11:41:49 +00:00
parent fc2427bcf8
commit 34b9ca5e14
2 changed files with 87 additions and 4 deletions
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18
lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp
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@@ -1137,8 +1137,11 @@ void ARMELFStreamer::emitFnEnd() {
"Compact model must use __aeabi_cpp_unwind_pr0 as personality"); "Compact model must use __aeabi_cpp_unwind_pr0 as personality");
assert(Opcodes.size() == 4u && assert(Opcodes.size() == 4u &&
"Unwind opcode size for __aeabi_cpp_unwind_pr0 must be equal to 4"); "Unwind opcode size for __aeabi_cpp_unwind_pr0 must be equal to 4");
EmitBytes(StringRef(reinterpret_cast<const char*>(Opcodes.data()), uint64_t Intval = Opcodes[0] |
Opcodes.size())); Opcodes[1] << 8 |
Opcodes[2] << 16 |
Opcodes[3] << 24;
EmitIntValue(Intval, Opcodes.size());
} }
// Switch to the section containing FnStart // Switch to the section containing FnStart
@@ -1210,8 +1213,15 @@ void ARMELFStreamer::FlushUnwindOpcodes(bool NoHandlerData) {
} }
// Emit unwind opcodes // Emit unwind opcodes
EmitBytes(StringRef(reinterpret_cast<const char *>(Opcodes.data()), assert((Opcodes.size() % 4) == 0 &&
Opcodes.size())); "Unwind opcode size for __aeabi_cpp_unwind_pr0 must be multiple of 4");
for (unsigned I = 0; I != Opcodes.size(); I += 4) {
uint64_t Intval = Opcodes[I] |
Opcodes[I + 1] << 8 |
Opcodes[I + 2] << 16 |
Opcodes[I + 3] << 24;
EmitIntValue(Intval, 4);
}
// According to ARM EHABI section 9.2, if the __aeabi_unwind_cpp_pr1() or // According to ARM EHABI section 9.2, if the __aeabi_unwind_cpp_pr1() or
// __aeabi_unwind_cpp_pr2() is used, then the handler data must be emitted // __aeabi_unwind_cpp_pr2() is used, then the handler data must be emitted

73
test/CodeGen/ARM/big-endian-eh-unwind.ll Normal file
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@@ -0,0 +1,73 @@
; RUN: llc -march armeb -mattr v7 -filetype obj -o - %s | llvm-objdump -s - | FileCheck %s
; ARM EHABI for big endian
; This test case checks whether frame unwinding instructions are laid out in big endian format.
;
; This is the LLVM assembly generated from following C++ code:
;
; extern void foo(int);
; void test(int a, int b) {
; try {
; foo(a);
; } catch (...) {
; foo(b);
; }
;}
define void @_Z4testii(i32 %a, i32 %b) #0 {
entry:
invoke void @_Z3fooi(i32 %a)
to label %try.cont unwind label %lpad
lpad: ; preds = %entry
%0 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
catch i8* null
%1 = extractvalue { i8*, i32 } %0, 0
%2 = tail call i8* @__cxa_begin_catch(i8* %1) #2
invoke void @_Z3fooi(i32 %b)
to label %invoke.cont2 unwind label %lpad1
invoke.cont2: ; preds = %lpad
tail call void @__cxa_end_catch()
br label %try.cont
try.cont: ; preds = %entry, %invoke.cont2
ret void
lpad1: ; preds = %lpad
%3 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
cleanup
invoke void @__cxa_end_catch()
to label %eh.resume unwind label %terminate.lpad
eh.resume: ; preds = %lpad1
resume { i8*, i32 } %3
terminate.lpad: ; preds = %lpad1
%4 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
catch i8* null
%5 = extractvalue { i8*, i32 } %4, 0
tail call void @__clang_call_terminate(i8* %5) #3
unreachable
}
declare void @_Z3fooi(i32) #0
declare i32 @__gxx_personality_v0(...)
declare i8* @__cxa_begin_catch(i8*)
declare void @__cxa_end_catch()
; Function Attrs: noinline noreturn nounwind
define linkonce_odr hidden void @__clang_call_terminate(i8*) #1 {
%2 = tail call i8* @__cxa_begin_catch(i8* %0) #2
tail call void @_ZSt9terminatev() #3
unreachable
}
declare void @_ZSt9terminatev()
; CHECK-LABEL: Contents of section .ARM.extab:
; CHECK-NEXT: 0000 00000000 00b0b0b0