forked from OSchip/llvm-project
[ARM] Implement veneers for dynamic executable linking
llvm-svn: 235486
This commit is contained in:
Denis Protivensky
parent
f6c8938edd
commit
4b0abddeea
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@ -873,13 +873,19 @@ public:
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/// \brief Get the veneer for ARM B/BL instructions.
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const VeneerAtom *getVeneer_ARM_B_BL(const DefinedAtom *da,
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StringRef secName) {
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llvm_unreachable("Handle ARM veneer");
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if (_ctx.getOutputELFType() == llvm::ELF::ET_EXEC) {
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return getVeneer_ARM_B_BL_Abs(da, secName);
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}
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llvm_unreachable("Handle ARM veneer for DSOs");
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}
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/// \brief Get the veneer for Thumb B/BL instructions.
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const VeneerAtom *getVeneer_THM_B_BL(const DefinedAtom *da,
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StringRef secName) {
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llvm_unreachable("Handle Thumb veneer");
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if (_ctx.getOutputELFType() == llvm::ELF::ET_EXEC) {
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return getVeneer_THM_B_BL_Abs(da, secName);
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}
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llvm_unreachable("Handle Thumb veneer for DSOs");
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}
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/// \brief Create a GOT entry for R_ARM_TLS_TPOFF32 reloc.
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@ -4,28 +4,51 @@
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# RUN: yaml2obj -format=elf -docnum 2 %s > %t-thm.o
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# RUN: lld -flavor gnu -target arm -m armelf_linux_eabi -Bstatic \
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# RUN: --noinhibit-exec %t-arm.o %t-thm.o -o %t
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# RUN: llvm-objdump -s -t %t | FileCheck -check-prefix=STATIC %s
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# RUN: llvm-objdump -s -t %t | FileCheck -check-prefix=B-VENEER %s
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# RUN: llvm-objdump -s -t %t | FileCheck -check-prefix=B-ADDR %s
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# B-VENEER: Contents of section .text:
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# B-VENEER: 400074 010000ea
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# STATIC: Contents of section .text:
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# STATIC: 400074 010000ea
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# Call from main:
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# offset = 0x4 ^^
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# offset = 0x4 ^^
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# call site offset PC(arm) ___Z1fv_from_arm addr
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# 0x400074 + 0x4 + 0x8 = 0x400080
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#
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# Code of the veneer:
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# B-VENEER: {{[0-9a-f]+}} {{[0-9a-f]+}} 04f01fe5
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# B-VENEER: 400084 79004000
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# call addr = 0x400079 ^^
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# STATIC: {{[0-9a-f]+}} {{[0-9a-f]+}} 04f01fe5
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# STATIC: 400084 79004000
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# ^^ call addr = 0x400079
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# call addr _Z1fv addr Thumb mode
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# 0x400079 = 0x400078 | 0x1
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#
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# B-ADDR: SYMBOL TABLE:
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# B-ADDR: 00400080 l F .text {{[0-9a-f]+}} ___Z1fv_from_arm
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# B-ADDR: 00400074 g F .text {{[0-9a-f]+}} main
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# B-ADDR: 00400078 g F .text {{[0-9a-f]+}} _Z1fv
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# STATIC: SYMBOL TABLE:
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# STATIC: 00400080 l F .text {{[0-9a-f]+}} ___Z1fv_from_arm
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# STATIC: 00400074 g F .text {{[0-9a-f]+}} main
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# STATIC: 00400078 g F .text {{[0-9a-f]+}} _Z1fv
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# RUN: yaml2obj -format=elf -docnum 1 %s > %t-arm.o
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# RUN: yaml2obj -format=elf -docnum 2 %s > %t-thm.o
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# RUN: lld -flavor gnu -target arm -m armelf_linux_eabi \
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# RUN: --noinhibit-exec %t-arm.o %t-thm.o -o %t
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# RUN: llvm-objdump -s -t %t | FileCheck -check-prefix=EXEC-DYN %s
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# EXEC-DYN: Contents of section .text:
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# EXEC-DYN: 400114 010000ea
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# Call from main:
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# offset = 0x4 ^^
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# call site offset PC(arm) ___Z1fv_from_arm addr
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# 0x400114 + 0x4 + 0x8 = 0x400120
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#
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# Code of the veneer:
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# EXEC-DYN: {{[0-9a-f]+}} {{[0-9a-f]+}} 04f01fe5
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# EXEC-DYN: 400124 19014000
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# call addr = 0x400119 ^^
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# call addr _Z1fv addr Thumb mode
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# 0x400119 = 0x400118 | 0x1
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#
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# EXEC-DYN: SYMBOL TABLE:
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# EXEC-DYN: 00400120 l F .text {{[0-9a-f]+}} ___Z1fv_from_arm
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# EXEC-DYN: 00400114 g F .text {{[0-9a-f]+}} main
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# EXEC-DYN: 00400118 g F .text {{[0-9a-f]+}} _Z1fv
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# arm.o
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---
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@ -4,27 +4,49 @@
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# RUN: yaml2obj -format=elf -docnum 2 %s > %t-thm.o
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# RUN: lld -flavor gnu -target arm -m armelf_linux_eabi -Bstatic \
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# RUN: --noinhibit-exec %t-arm.o %t-thm.o -o %t
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# RUN: llvm-objdump -s -t %t | FileCheck -check-prefix=STATIC %s
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# RUN: llvm-objdump -s -t %t | FileCheck -check-prefix=BL-VENEER %s
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# RUN: llvm-objdump -s -t %t | FileCheck -check-prefix=BL-ADDR %s
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# BL-VENEER: Contents of section .text:
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# BL-VENEER: 400084 0400000b
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# STATIC: Contents of section .text:
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# STATIC: 400084 0400000b
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# Call from main:
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# offset = 0x10 ^^
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# offset = 0x10 ^^
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# call site offset PC(arm) ___Z1fv_from_arm addr
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# 0x400084 + 0x10 + 0x8 = 0x40009c
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#
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# Code of the veneer:
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# BL-VENEER: 400094 {{[0-9a-f]+}} {{[0-9a-f]+}} {{[0-9a-f]+}} 95004000
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# call addr = 0x400095 ^^
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# STATIC: 400094 {{[0-9a-f]+}} {{[0-9a-f]+}} {{[0-9a-f]+}} 95004000
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# call addr = 0x400095 ^^
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# call addr _Z1fv addr Thumb mode
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# 0x400095 = 0x400094 | 0x1
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#
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# BL-ADDR: SYMBOL TABLE:
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# BL-ADDR: 0040009c l F .text {{[0-9a-f]+}} ___Z1fv_from_arm
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# BL-ADDR: 00400074 g F .text {{[0-9a-f]+}} main
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# BL-ADDR: 00400094 g F .text {{[0-9a-f]+}} _Z1fv
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# STATIC: SYMBOL TABLE:
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# STATIC: 0040009c l F .text {{[0-9a-f]+}} ___Z1fv_from_arm
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# STATIC: 00400074 g F .text {{[0-9a-f]+}} main
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# STATIC: 00400094 g F .text {{[0-9a-f]+}} _Z1fv
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# RUN: yaml2obj -format=elf -docnum 1 %s > %t-arm.o
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# RUN: yaml2obj -format=elf -docnum 2 %s > %t-thm.o
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# RUN: lld -flavor gnu -target arm -m armelf_linux_eabi \
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# RUN: --noinhibit-exec %t-arm.o %t-thm.o -o %t
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# RUN: llvm-objdump -s -t %t | FileCheck -check-prefix=EXEC-DYN %s
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# EXEC-DYN: Contents of section .text:
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# EXEC-DYN: 400124 0400000b
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# Call from main:
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# offset = 0x10 ^^
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# call site offset PC(arm) ___Z1fv_from_arm addr
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# 0x400124 + 0x10 + 0x8 = 0x40013c
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#
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# Code of the veneer:
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# EXEC-DYN: 400134 {{[0-9a-f]+}} {{[0-9a-f]+}} {{[0-9a-f]+}} 35014000
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# call addr = 0x400135 ^^
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# call addr _Z1fv addr Thumb mode
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# 0x400135 = 0x400134 | 0x1
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#
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# EXEC-DYN: SYMBOL TABLE:
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# EXEC-DYN: 0040013c l F .text {{[0-9a-f]+}} ___Z1fv_from_arm
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# EXEC-DYN: 00400114 g F .text {{[0-9a-f]+}} main
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# EXEC-DYN: 00400134 g F .text {{[0-9a-f]+}} _Z1fv
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# arm.o
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---
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@ -4,27 +4,49 @@
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# RUN: yaml2obj -format=elf -docnum 2 %s > %t-thm.o
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# RUN: lld -flavor gnu -target arm -m armelf_linux_eabi -Bstatic \
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# RUN: --noinhibit-exec %t-arm.o %t-thm.o -o %t
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# RUN: llvm-objdump -s -t %t | FileCheck -check-prefix=STATIC %s
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# RUN: llvm-objdump -s -t %t | FileCheck -check-prefix=B-VENEER %s
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# RUN: llvm-objdump -s -t %t | FileCheck -check-prefix=B-ADDR %s
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# B-VENEER: Contents of section .text:
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# B-VENEER: 400074 {{[0-9a-f]+}} {{[0-9a-f]+}} {{[0-9a-f]+}} 00f000b8
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# STATIC: Contents of section .text:
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# STATIC: 400074 {{[0-9a-f]+}} {{[0-9a-f]+}} {{[0-9a-f]+}} 00f000b8
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# Call from main:
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# offset = 0x0 ^^
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# offset = 0x0 ^^
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# call site offset PC(thm) ___Z1fv_from_thumb addr
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# 0x400080 + 0x0 + 0x4 = 0x400084
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#
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# Code of the veneer:
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# B-VENEER: 400084 78470000 f9ffffea
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# offset = -0x1C ^^
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# STATIC: 400084 78470000 f9ffffea
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# offset = -0x1C ^^
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# call site offset PC(arm) _Z1fv
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# 0x400088 + (-0x1C) + 0x8 = 0x400074
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#
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# B-ADDR: SYMBOL TABLE:
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# B-ADDR: 00400084 l F .text {{[0-9a-f]+}} ___Z1fv_from_thumb
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# B-ADDR: 00400074 g F .text {{[0-9a-f]+}} _Z1fv
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# B-ADDR: 00400080 g F .text {{[0-9a-f]+}} main
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# STATIC: SYMBOL TABLE:
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# STATIC: 00400084 l F .text {{[0-9a-f]+}} ___Z1fv_from_thumb
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# STATIC: 00400074 g F .text {{[0-9a-f]+}} _Z1fv
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# STATIC: 00400080 g F .text {{[0-9a-f]+}} main
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# RUN: yaml2obj -format=elf -docnum 1 %s > %t-arm.o
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# RUN: yaml2obj -format=elf -docnum 2 %s > %t-thm.o
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# RUN: lld -flavor gnu -target arm -m armelf_linux_eabi \
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# RUN: --noinhibit-exec %t-arm.o %t-thm.o -o %t
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# RUN: llvm-objdump -s -t %t | FileCheck -check-prefix=EXEC-DYN %s
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# EXEC-DYN: Contents of section .text:
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# EXEC-DYN: 400114 {{[0-9a-f]+}} {{[0-9a-f]+}} {{[0-9a-f]+}} 00f000b8
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# Call from main:
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# offset = 0x0 ^^
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# call site offset PC(thm) ___Z1fv_from_thumb addr
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# 0x400120 + 0x0 + 0x4 = 0x400124
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#
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# Code of the veneer:
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# EXEC-DYN: 400124 78470000 f9ffffea
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# offset = -0x1C ^^
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# call site offset PC(arm) _Z1fv
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# 0x400128 + (-0x1C) + 0x8 = 0x400114
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#
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# EXEC-DYN: SYMBOL TABLE:
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# EXEC-DYN: 00400124 l F .text {{[0-9a-f]+}} ___Z1fv_from_thumb
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# EXEC-DYN: 00400114 g F .text {{[0-9a-f]+}} _Z1fv
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# EXEC-DYN: 00400120 g F .text {{[0-9a-f]+}} main
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# arm.o
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---
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