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llvm-objdump: Handle BSS sections larger than the object file

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The size of the uninitialized sections, like BSS, can exceed the size of
the object file.

Do not attempt to grab the contents of such sections.

llvm-svn: 212953
This commit is contained in:
David Majnemer 2014-07-14 16:20:14 +00:00
parent 4ef7afc394
commit fa3efc30b3
3 changed files with 14 additions and 4 deletions
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BIN
test/tools/llvm-objdump/Inputs/large-bss.obj.coff-i386 Normal file
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6
test/tools/llvm-objdump/coff-large-bss.test Normal file
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@ -0,0 +1,6 @@
RUN: llvm-objdump -s %p/Inputs/large-bss.obj.coff-i386 | FileCheck %s
; CHECK: Contents of section .text:
: CHECK-NEXT: Contents of section .data:
: CHECK-NEXT: Contents of section .bss:
: CHECK-NEXT: <skipping contents of bss section at [0000, 010f)>

12
tools/llvm-objdump/llvm-objdump.cpp
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@ -628,8 +628,6 @@ static void PrintSectionContents(const ObjectFile *Obj) {
bool BSS;
if (error(Section.getName(Name)))
continue;
if (error(Section.getContents(Contents)))
continue;
if (error(Section.getAddress(BaseAddr)))
continue;
if (error(Section.isBSS(BSS)))
@ -637,12 +635,18 @@ static void PrintSectionContents(const ObjectFile *Obj) {
outs() << "Contents of section " << Name << ":\n";
if (BSS) {
uint64_t Size;
if (error(Section.getSize(Size)))
continue;
outs() << format("<skipping contents of bss section at [%04" PRIx64
", %04" PRIx64 ")>\n", BaseAddr,
BaseAddr + Contents.size());
", %04" PRIx64 ")>\n",
BaseAddr, BaseAddr + Size);
continue;
}
if (error(Section.getContents(Contents)))
continue;
// Dump out the content as hex and printable ascii characters.
for (std::size_t addr = 0, end = Contents.size(); addr < end; addr += 16) {
outs() << format(" %04" PRIx64 " ", BaseAddr + addr);