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22c328969d
When a landing pad is calculated in a program that is compiled for micromips with -fPIC flag, 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. r344591 fixed this issue for -static compilation. Patch by Aleksandar Beserminji. Differential Revision: https://reviews.llvm.org/D57677 llvm-svn: 353480
51 lines
2.2 KiB
LLVM
51 lines
2.2 KiB
LLVM
; RUN: llc -mtriple mips-unknown-linux-gnu -mattr=+micromips -relocation-model=static -O3 -filetype=obj -o - %s | \
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; RUN: llvm-readelf -r | FileCheck %s --check-prefix=CHECK-READELF
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; RUN: llc -mtriple mips-unknown-linux-gnu -mattr=+micromips -relocation-model=pic -O3 -filetype=obj -o - %s | \
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; RUN: llvm-readelf -r | FileCheck %s --check-prefix=CHECK-READELF
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; RUN: llc -mtriple mips-unknown-linux-gnu -mattr=+micromips -relocation-model=static -O3 -filetype=obj -o - %s | \
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; RUN: llvm-objdump -s -j .gcc_except_table - | FileCheck %s --check-prefix=CHECK-EXCEPT-TABLE-STATIC
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; RUN: llc -mtriple mips-unknown-linux-gnu -mattr=+micromips -relocation-model=pic -O3 -filetype=obj -o - %s | \
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; RUN: llvm-objdump -s -j .gcc_except_table - | FileCheck %s --check-prefix=CHECK-EXCEPT-TABLE-PIC
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; CHECK-READELF: .rel.eh_frame
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; CHECK-READELF: DW.ref.__gxx_personality_v0
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; CHECK-READELF-NEXT: .text
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; CHECK-READELF-NEXT: .gcc_except_table
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; CHECK-EXCEPT-TABLE-STATIC: 0000 ff9b1501 0c011500 00150e23 01231e00 ...........#.#..
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; CHECK-EXCEPT-TABLE-STATIC: 0010 00010000 00000000
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; CHECK-EXCEPT-TABLE-PIC: 0000 ff9b1501 0c012d00 002d133f 013f2a00 ......-..-.?.?*.
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; CHECK-EXCEPT-TABLE-PIC: 0010 00010000 00000000 ........
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@_ZTIi = external constant i8*
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define dso_local i32 @main() local_unnamed_addr personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
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entry:
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%exception.i = tail call i8* @__cxa_allocate_exception(i32 4) nounwind
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%0 = bitcast i8* %exception.i to i32*
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store i32 5, i32* %0, align 16
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invoke void @__cxa_throw(i8* %exception.i, i8* bitcast (i8** @_ZTIi to i8*), i8* null) noreturn
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to label %.noexc unwind label %return
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.noexc:
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unreachable
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return:
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%1 = landingpad { i8*, i32 }
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catch i8* null
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%2 = extractvalue { i8*, i32 } %1, 0
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%3 = tail call i8* @__cxa_begin_catch(i8* %2) nounwind
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tail call void @__cxa_end_catch()
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ret i32 0
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}
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declare i32 @__gxx_personality_v0(...)
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declare i8* @__cxa_begin_catch(i8*) local_unnamed_addr
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declare void @__cxa_end_catch() local_unnamed_addr
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declare i8* @__cxa_allocate_exception(i32) local_unnamed_addr
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declare void @__cxa_throw(i8*, i8*, i8*) local_unnamed_addr
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