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Add support for applying in-memory relocations to the .debug_line section and, in the case of ELF files, using symbol addresses when available for relocations to the .debug_info section. Also extending the llvm-rtdyld tool to add the ability to dump line number information for testing purposes.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173517 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Kaylor
2013-01-25 22:50:58 +00:00
parent c73b7f7022
commit ee7c0d2f93
13 changed files with 137 additions and 11 deletions
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lib/DebugInfo/DWARFDebugLine.cpp
+12 -3
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@@ -155,7 +155,7 @@ DWARFDebugLine::getOrParseLineTable(DataExtractor debug_line_data,
if (pos.second) {
// Parse and cache the line table for at this offset.
State state;
if (!parseStatementTable(debug_line_data, &offset, state))
if (!parseStatementTable(debug_line_data, RelocMap, &offset, state))
return 0;
pos.first->second = state;
}
@@ -219,7 +219,8 @@ DWARFDebugLine::parsePrologue(DataExtractor debug_line_data,
}
bool
DWARFDebugLine::parseStatementTable(DataExtractor debug_line_data,
DWARFDebugLine::parseStatementTable(DataExtractor debug_line_data,
const RelocAddrMap *RMap,
uint32_t *offset_ptr, State &state) {
const uint32_t debug_line_offset = *offset_ptr;
@@ -268,7 +269,15 @@ DWARFDebugLine::parseStatementTable(DataExtractor debug_line_data,
// relocatable address. All of the other statement program opcodes
// that affect the address register add a delta to it. This instruction
// stores a relocatable value into it instead.
state.Address = debug_line_data.getAddress(offset_ptr);
{
// If this address is in our relocation map, apply the relocation.
RelocAddrMap::const_iterator AI = RMap->find(*offset_ptr);
if (AI != RMap->end()) {
const std::pair<uint8_t, int64_t> &R = AI->second;
state.Address = debug_line_data.getAddress(offset_ptr) + R.second;
} else
state.Address = debug_line_data.getAddress(offset_ptr);
}
break;
case DW_LNE_define_file: