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MC/Mach-O/ARM: Add enough relocation logic to get BR24 relocations.

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llvm-svn: 122407
This commit is contained in:
Daniel Dunbar 2010-12-22 16:19:24 +00:00
parent 55eff2421b
commit e44a2c1166
2 changed files with 128 additions and 3 deletions
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29
lib/MC/MachObjectWriter.cpp
View File

@ -24,6 +24,7 @@
#include "llvm/Target/TargetAsmBackend.h"
// FIXME: Gross.
#include "../Target/ARM/ARMFixupKinds.h"
#include "../Target/X86/X86FixupKinds.h"
#include <vector>
@ -843,12 +844,33 @@ public:
Relocations[Fragment->getParent()].push_back(MRE);
}
static bool getARMFixupKindMachOInfo(unsigned Kind, bool &Is24BitBranch,
unsigned &Log2Size) {
switch (Kind) {
default:
return false;
// Handle 24-bit branch kinds.
case ARM::fixup_arm_ldst_pcrel_12:
case ARM::fixup_arm_pcrel_10:
case ARM::fixup_arm_adr_pcrel_12:
case ARM::fixup_arm_branch:
Is24BitBranch = true;
// Report as 'long', even though that is not quite accurate.
Log2Size = llvm::Log2_32(4);
return true;
}
}
void RecordARMRelocation(const MCAssembler &Asm, const MCAsmLayout &Layout,
const MCFragment *Fragment, const MCFixup &Fixup,
MCValue Target, uint64_t &FixedValue) {
unsigned IsPCRel = isFixupKindPCRel(Asm, Fixup.getKind());
// FIXME: Eliminate this!
unsigned Log2Size = getFixupKindLog2Size(Fixup.getKind());
unsigned Log2Size;
bool Is24BitBranch;
if (!getARMFixupKindMachOInfo(Fixup.getKind(), Is24BitBranch, Log2Size)) {
report_fatal_error("unknown ARM fixup kind!");
return;
}
// If this is a difference or a defined symbol plus an offset, then we need
// a scattered relocation entry. Differences always require scattered
@ -912,7 +934,8 @@ public:
if (IsPCRel)
FixedValue -= getSectionAddress(Fragment->getParent());
Type = macho::RIT_Vanilla;
// Determine the appropriate type based on the fixup kind.
Type = Is24BitBranch ? macho::RIT_ARM_Branch24Bit : macho::RIT_Vanilla;
}
// struct relocation_info (8 bytes)

102
test/MC/MachO/darwin-ARM-reloc.s Normal file
View File

@ -0,0 +1,102 @@
@ RUN: llvm-mc -n -triple armv7-apple-darwin10 %s -filetype=obj -o %t.obj
@ RUN: macho-dump --dump-section-data < %t.obj > %t.dump
@ RUN: FileCheck < %t.dump %s
.syntax unified
.text
_f0:
bl _printf
@ CHECK: ('cputype', 12)
@ CHECK: ('cpusubtype', 9)
@ CHECK: ('filetype', 1)
@ CHECK: ('num_load_commands', 3)
@ CHECK: ('load_commands_size', 228)
@ CHECK: ('flag', 0)
@ CHECK: ('load_commands', [
@ CHECK: # Load Command 0
@ CHECK: (('command', 1)
@ CHECK: ('size', 124)
@ CHECK: ('segment_name', '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
@ CHECK: ('vm_addr', 0)
@ CHECK: ('vm_size', 4)
@ CHECK: ('file_offset', 256)
@ CHECK: ('file_size', 4)
@ CHECK: ('maxprot', 7)
@ CHECK: ('initprot', 7)
@ CHECK: ('num_sections', 1)
@ CHECK: ('flags', 0)
@ CHECK: ('sections', [
@ CHECK: # Section 0
@ CHECK: (('section_name', '__text\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
@ CHECK: ('segment_name', '__TEXT\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
@ CHECK: ('address', 0)
@ CHECK: ('size', 4)
@ CHECK: ('offset', 256)
@ CHECK: ('alignment', 0)
@ CHECK: ('reloc_offset', 260)
@ CHECK: ('num_reloc', 1)
@ CHECK: ('flags', 0x80000400)
@ CHECK: ('reserved1', 0)
@ CHECK: ('reserved2', 0)
@ CHECK: ),
@ CHECK: ('_relocations', [
@ CHECK: # Relocation 0
@ CHECK: (('word-0', 0x0),
@ CHECK: ('word-1', 0x5d000001)),
@ CHECK: ])
@ CHECK: ('_section_data', 'feffffeb')
@ CHECK: ])
@ CHECK: ),
@ CHECK: # Load Command 1
@ CHECK: (('command', 2)
@ CHECK: ('size', 24)
@ CHECK: ('symoff', 268)
@ CHECK: ('nsyms', 2)
@ CHECK: ('stroff', 292)
@ CHECK: ('strsize', 16)
@ CHECK: ('_string_data', '\x00_printf\x00_f0\x00\x00\x00\x00')
@ CHECK: ('_symbols', [
@ CHECK: # Symbol 0
@ CHECK: (('n_strx', 9)
@ CHECK: ('n_type', 0xe)
@ CHECK: ('n_sect', 1)
@ CHECK: ('n_desc', 0)
@ CHECK: ('n_value', 0)
@ CHECK: ('_string', '_f0')
@ CHECK: ),
@ CHECK: # Symbol 1
@ CHECK: (('n_strx', 1)
@ CHECK: ('n_type', 0x1)
@ CHECK: ('n_sect', 0)
@ CHECK: ('n_desc', 0)
@ CHECK: ('n_value', 0)
@ CHECK: ('_string', '_printf')
@ CHECK: ),
@ CHECK: ])
@ CHECK: ),
@ CHECK: # Load Command 2
@ CHECK: (('command', 11)
@ CHECK: ('size', 80)
@ CHECK: ('ilocalsym', 0)
@ CHECK: ('nlocalsym', 1)
@ CHECK: ('iextdefsym', 1)
@ CHECK: ('nextdefsym', 0)
@ CHECK: ('iundefsym', 1)
@ CHECK: ('nundefsym', 1)
@ CHECK: ('tocoff', 0)
@ CHECK: ('ntoc', 0)
@ CHECK: ('modtaboff', 0)
@ CHECK: ('nmodtab', 0)
@ CHECK: ('extrefsymoff', 0)
@ CHECK: ('nextrefsyms', 0)
@ CHECK: ('indirectsymoff', 0)
@ CHECK: ('nindirectsyms', 0)
@ CHECK: ('extreloff', 0)
@ CHECK: ('nextrel', 0)
@ CHECK: ('locreloff', 0)
@ CHECK: ('nlocrel', 0)
@ CHECK: ('_indirect_symbols', [
@ CHECK: ])
@ CHECK: ),
@ CHECK: ])