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PR13013: ELF Type identification fails for MSB type ELF files.

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Fix 'sys::IdentifyFileType' to work with big and little endian byte orderings
when reading the ELF object file type.

Initial patch by Stefan Hepp.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159138 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Meador Inge 2012-06-25 14:48:43 +00:00
parent a0706a9ff4
commit b935cd1514
2 changed files with 16 additions and 2 deletions
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7
lib/Support/Path.cpp
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@ -60,8 +60,11 @@ sys::IdentifyFileType(const char *magic, unsigned length) {
case '\177':
if (magic[1] == 'E' && magic[2] == 'L' && magic[3] == 'F') {
if (length >= 18 && magic[17] == 0)
switch (magic[16]) {
bool Data2MSB = magic[5] == 2;
unsigned high = Data2MSB ? 16 : 17;
unsigned low = Data2MSB ? 17 : 16;
if (length >= 18 && magic[high] == 0)
switch (magic[low]) {
default: break;
case 1: return ELF_Relocatable_FileType;
case 2: return ELF_Executable_FileType;

11
test/MC/Mips/elf-objdump.s Normal file
View File

@ -0,0 +1,11 @@
// 32 bit big endian
// RUN: llvm-mc -filetype=obj -triple mips-unknown-linux %s -o - | llvm-objdump -d -triple mips-unknown-linux - | FileCheck %s
// 32 bit little endian
// RUN: llvm-mc -filetype=obj -triple mipsel-unknown-linux %s -o - | llvm-objdump -d -triple mips-unknown-linux - | FileCheck %s
// 64 bit big endian
// RUN: llvm-mc -filetype=obj -arch=mips64 -triple mips64-unknown-linux %s -o - | llvm-objdump -d -triple mips-unknown-linux - | FileCheck %s
// 64 bit little endian
// RUN: llvm-mc -filetype=obj -arch=mips64el -triple mips64el-unknown-linux %s -o - | llvm-objdump -d -triple mips-unknown-linux - | FileCheck %s
// We just want to see if llvm-objdump works at all.
// CHECK: .text