Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
------------------------------------------------------------------------ r344591 | abeserminji | 2018-10-16 01:27:28 -0700 (Tue, 16 Oct 2018) | 11 lines [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: 347028
- Loading branch information
Showing
5 changed files
with
58 additions
and
0 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -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 |