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Make sure we calculate resolver symbol addresses correctly for ARM. The trie entries have bit 0 set for Thumb functions and we need to remove that so we can correctly determine which symbols are resolvers.

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<rdar://problem/21396553>

llvm-svn: 242435
This commit is contained in:
Greg Clayton 2015-07-16 19:50:57 +00:00
parent 78655fcfdc
commit b887da1db3
1 changed files with 14 additions and 8 deletions
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22
lldb/source/Plugins/ObjectFile/Mach-O/ObjectFileMachO.cpp
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@ -54,6 +54,7 @@
#include "Utility/UuidCompatibility.h"
#endif
#define THUMB_ADDRESS_BIT_MASK 0xfffffffffffffffeull
using namespace lldb;
using namespace lldb_private;
using namespace llvm::MachO;
@ -2058,6 +2059,7 @@ struct TrieEntryWithOffset
static void
ParseTrieEntries (DataExtractor &data,
lldb::offset_t offset,
const bool is_arm,
std::vector<llvm::StringRef> &nameSlices,
std::set<lldb::addr_t> &resolver_addresses,
std::vector<TrieEntryWithOffset>& output)
@ -2080,9 +2082,11 @@ ParseTrieEntries (DataExtractor &data,
e.entry.address = data.GetULEB128(&offset);
if ( e.entry.flags & EXPORT_SYMBOL_FLAGS_STUB_AND_RESOLVER )
{
//resolver_addresses.insert(e.entry.address);
e.entry.other = data.GetULEB128(&offset);
resolver_addresses.insert(e.entry.other);
uint64_t resolver_addr = e.entry.other;
if (is_arm)
resolver_addr &= THUMB_ADDRESS_BIT_MASK;
resolver_addresses.insert(resolver_addr);
}
else
e.entry.other = 0;
@ -2118,6 +2122,7 @@ ParseTrieEntries (DataExtractor &data,
{
ParseTrieEntries(data,
childNodeOffset,
is_arm,
nameSlices,
resolver_addresses,
output);
@ -2542,6 +2547,7 @@ ObjectFileMachO::ParseSymtab ()
std::vector<llvm::StringRef> nameSlices;
ParseTrieEntries (dyld_trie_data,
0,
is_arm,
nameSlices,
resolver_addresses,
trie_entries);
@ -3423,7 +3429,7 @@ ObjectFileMachO::ParseSymtab ()
{
if (symbol_file_addr & 1)
symbol_flags = MACHO_NLIST_ARM_SYMBOL_IS_THUMB;
symbol_file_addr &= 0xfffffffffffffffeull;
symbol_file_addr &= THUMB_ADDRESS_BIT_MASK;
}
const FunctionStarts::Entry *next_func_start_entry = function_starts.FindNextEntry (func_start_entry);
@ -3434,7 +3440,7 @@ ObjectFileMachO::ParseSymtab ()
// Be sure the clear the Thumb address bit when we calculate the size
// from the current and next address
if (is_arm)
next_symbol_file_addr &= 0xfffffffffffffffeull;
next_symbol_file_addr &= THUMB_ADDRESS_BIT_MASK;
symbol_byte_size = std::min<lldb::addr_t>(next_symbol_file_addr - symbol_file_addr, section_end_file_addr - symbol_file_addr);
}
else
@ -4275,7 +4281,7 @@ ObjectFileMachO::ParseSymtab ()
addr_t symbol_file_addr = func_start_entry->addr;
if (is_arm)
symbol_file_addr &= 0xfffffffffffffffeull;
symbol_file_addr &= THUMB_ADDRESS_BIT_MASK;
const FunctionStarts::Entry *next_func_start_entry = function_starts.FindNextEntry (func_start_entry);
const addr_t section_end_file_addr = section_file_addr + symbol_section->GetByteSize();
@ -4285,7 +4291,7 @@ ObjectFileMachO::ParseSymtab ()
// Be sure the clear the Thumb address bit when we calculate the size
// from the current and next address
if (is_arm)
next_symbol_file_addr &= 0xfffffffffffffffeull;
next_symbol_file_addr &= THUMB_ADDRESS_BIT_MASK;
symbol_byte_size = std::min<lldb::addr_t>(next_symbol_file_addr - symbol_file_addr, section_end_file_addr - symbol_file_addr);
}
else
@ -4459,7 +4465,7 @@ ObjectFileMachO::ParseSymtab ()
{
if (symbol_file_addr & 1)
symbol_flags = MACHO_NLIST_ARM_SYMBOL_IS_THUMB;
symbol_file_addr &= 0xfffffffffffffffeull;
symbol_file_addr &= THUMB_ADDRESS_BIT_MASK;
}
Address symbol_addr;
if (module_sp->ResolveFileAddress (symbol_file_addr, symbol_addr))
@ -4475,7 +4481,7 @@ ObjectFileMachO::ParseSymtab ()
{
addr_t next_symbol_file_addr = next_func_start_entry->addr;
if (is_arm)
next_symbol_file_addr &= 0xfffffffffffffffeull;
next_symbol_file_addr &= THUMB_ADDRESS_BIT_MASK;
symbol_byte_size = std::min<lldb::addr_t>(next_symbol_file_addr - symbol_file_addr, section_end_file_addr - symbol_file_addr);
}
else