llvm.org GIT mirror llvm / b843060
[PowerPC] Support TLS variables in debug info This adds an implementation of getDebugThreadLocalSymbol for (64-bit) PowerPC. This needs to return a generic MCExpr since on ppc64, we need to add a bias of 0x8000 to the value returned by the R_PPC64_DTPREL64 relocation. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185461 91177308-0d34-0410-b5e6-96231b3b80d8 Ulrich Weigand 7 years ago
4 changed file(s) with 53 addition(s) and 3 deletion(s). Raw diff Collapse all Expand all
5454
5555 return DefaultSection;
5656 }
57
58 const MCExpr *PPC64LinuxTargetObjectFile::
59 getDebugThreadLocalSymbol(const MCSymbol *Sym) const {
60 const MCExpr *Expr =
61 MCSymbolRefExpr::Create(Sym, MCSymbolRefExpr::VK_PPC_DTPREL, getContext());
62 return MCBinaryExpr::CreateAdd(Expr,
63 MCConstantExpr::Create(0x8000, getContext()),
64 getContext());
65 }
66
2424 virtual const MCSection *
2525 SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
2626 Mangler *Mang, const TargetMachine &TM) const;
27
28 /// \brief Describe a TLS variable address within debug info.
29 virtual const MCExpr *getDebugThreadLocalSymbol(const MCSymbol *Sym) const;
2730 };
2831
2932 } // end namespace llvm
0 ; RUN: llc -split-dwarf=Enable -mtriple=powerpc64-unknown-linux-gnu -O0 -filetype=asm < %s | FileCheck %s
1
2 ; FIXME: add relocation and DWARF expression support to llvm-dwarfdump & use
3 ; that here instead of raw assembly printing
4
5 ; CHECK: debug_info.dwo
6 ; 3 bytes of data in this DW_FORM_block1 representation of the location of 'tls'
7 ; CHECK: .byte 3{{ *}}# DW_AT_location
8 ; DW_OP_const_index (0xfx == 252) to refer to the debug_addr table
9 ; CHECK-NEXT: .byte 252
10 ; an index of zero into the debug_addr table
11 ; CHECK-NEXT: .byte 0
12 ; DW_OP_GNU_push_tls_address
13 ; CHECK-NEXT: .byte 224
14 ; check that the expected TLS address description is the first thing in the debug_addr section
15 ; CHECK: debug_addr
16 ; CHECK-NEXT: .quad tls@dtprel+32768
17
18 @tls = thread_local global i32 0, align 4
19
20 !llvm.dbg.cu = !{!0}
21 !llvm.module.flags = !{!7}
22
23 !0 = metadata !{i32 786449, metadata !1, i32 4, metadata !"clang version 3.4 ", i1 false, metadata !"", i32 0, metadata !2, metadata !2, metadata !2, metadata !3, metadata !2, metadata !"tls.dwo"} ; [ DW_TAG_compile_unit ] [/tmp/tls.cpp] [DW_LANG_C_plus_plus]
24 !1 = metadata !{metadata !"tls.cpp", metadata !"/tmp"}
25 !2 = metadata !{i32 0}
26 !3 = metadata !{metadata !4}
27 !4 = metadata !{i32 786484, i32 0, null, metadata !"tls", metadata !"tls", metadata !"", metadata !5, i32 1, metadata !6, i32 0, i32 1, i32* @tls, null} ; [ DW_TAG_variable ] [tls] [line 1] [def]
28 !5 = metadata !{i32 786473, metadata !1} ; [ DW_TAG_file_type ] [/tmp/tls.cpp]
29 !6 = metadata !{i32 786468, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
30 !7 = metadata !{i32 2, metadata !"Dwarf Version", i32 3}
None ; RUN: llc -mtriple=powerpc-unknown-unknown -O0 -filetype=asm < %s | FileCheck %s
0 ; RUN: llc -mtriple=powerpc64-unknown-linux-gnu -O0 -filetype=asm < %s | FileCheck %s
11
22 ; FIXME: add relocation and DWARF expression support to llvm-dwarfdump & use
33 ; that here instead of raw assembly printing
44
5 ; CHECK: debug_info
6 ; CHECK-NOT: tls@DTPOFF
5 ; 10 bytes of data in this DW_FORM_block1 representation of the location of 'tls'
6 ; CHECK: .byte 10{{ *}}# DW_AT_location
7 ; DW_OP_const8u
8 ; CHECK: .byte 14
9 ; The debug relocation of the address of the tls variable
10 ; CHECK: .quad tls@dtprel+32768
11 ; DW_OP_GNU_push_tls_address
12 ; CHECK: .byte 224
713
814 @tls = thread_local global i32 7, align 4
915