Initial .cfi_offset implementation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122611 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/MC/MCStreamer.cpp b/lib/MC/MCStreamer.cpp
index 9a85707590ca76bc46e180b84259713ad26abd76..f5e0d20e0985a5ebde6cdfcc8a8e95a1a13f924c 100644 (file)
--- a/lib/MC/MCStreamer.cpp
+++ b/lib/MC/MCStreamer.cpp
@@ -191,6 +191,13 @@ bool MCStreamer::EmitCFIDefCfaRegister(int64_t Register) {
 
 bool MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
   EnsureValidFrame();
+  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+  MCSymbol *Label = getContext().CreateTempSymbol();
+  EmitLabel(Label);
+  MachineLocation Dest(Register, Offset);
+  MachineLocation Source(Register, Offset);
+  MCCFIInstruction Instruction(Label, Dest, Source);
+  CurFrame->Instructions.push_back(Instruction);
   return false;
 }
 

diff --git a/test/MC/ELF/cfi-offset.s b/test/MC/ELF/cfi-offset.s
new file mode 100644 (file)
index 0000000..ec26464
--- /dev/null
+++ b/test/MC/ELF/cfi-offset.s
@@ -0,0 +1,42 @@
+// RUN: llvm-mc -filetype=obj -triple x86_64-pc-linux-gnu %s -o - | elf-dump  --dump-section-data | FileCheck %s
+
+f:
+       .cfi_startproc
+        nop
+       .cfi_offset 6, -16
+        nop
+       .cfi_endproc
+
+// CHECK:      (('sh_name', 0x00000012) # '.eh_frame'
+// CHECK-NEXT:  ('sh_type', 0x00000001)
+// CHECK-NEXT:  ('sh_flags', 0x00000002)
+// CHECK-NEXT:  ('sh_addr', 0x00000000)
+// CHECK-NEXT:  ('sh_offset', 0x00000048)
+// CHECK-NEXT:  ('sh_size', 0x00000030)
+// CHECK-NEXT:  ('sh_link', 0x00000000)
+// CHECK-NEXT:  ('sh_info', 0x00000000)
+// CHECK-NEXT:  ('sh_addralign', 0x00000008)
+// CHECK-NEXT:  ('sh_entsize', 0x00000000)
+// CHECK-NEXT:  ('_section_data', '14000000 00000000 017a5200 01781001 1b0c0708 90010000 14000000 1c000000 00000000 02000000 00418602 00000000')
+// CHECK-NEXT: ),
+
+
+// CHECK:      (('sh_name', 0x00000036) # '.rela.eh_frame'
+// CHECK-NEXT:  ('sh_type', 0x00000004)
+// CHECK-NEXT:  ('sh_flags', 0x00000000)
+// CHECK-NEXT:  ('sh_addr', 0x00000000)
+// CHECK-NEXT:  ('sh_offset', 0x00000158)
+// CHECK-NEXT:  ('sh_size', 0x00000018)
+// CHECK-NEXT:  ('sh_link', 0x00000006)
+// CHECK-NEXT:  ('sh_info', 0x00000004)
+// CHECK-NEXT:  ('sh_addralign', 0x00000008)
+// CHECK-NEXT:  ('sh_entsize', 0x00000018)
+// CHECK-NEXT:  ('_relocations', [
+// CHECK-NEXT:   # Relocation 0x00000000
+// CHECK-NEXT:   (('r_offset', 0x00000020)
+// CHECK-NEXT:    ('r_sym', 0x00000002)
+// CHECK-NEXT:    ('r_type', 0x00000002)
+// CHECK-NEXT:    ('r_addend', 0x00000000)
+// CHECK-NEXT:   ),
+// CHECK-NEXT:  ])
+// CHECK-NEXT: ),