| # REQUIRES: aarch64 |
| # RUN: llvm-mc -filetype=obj -triple=aarch64-linux-gnu %s -o %t.o |
| # RUN: llvm-mc -filetype=obj -triple=aarch64-linux-gnu %p/Inputs/aarch64-bti1.s -o %t1.o |
| # RUN: llvm-mc -filetype=obj -triple=aarch64-linux-gnu %p/Inputs/aarch64-func3.s -o %t2.o |
| # RUN: llvm-mc -filetype=obj -triple=aarch64-linux-gnu %p/Inputs/aarch64-func3-bti.s -o %t3.o |
| # RUN: llvm-mc -filetype=obj -triple=aarch64-linux-gnu %p/Inputs/aarch64-func2.s -o %tno.o |
| |
| ## We do not add BTI support when the inputs don't have the .note.gnu.property |
| ## field. |
| |
| # RUN: ld.lld %tno.o %t3.o --shared -o %tno.so |
| # RUN: llvm-objdump -d -mattr=+bti --no-show-raw-insn %tno.so | FileCheck --check-prefix=NOBTI %s |
| # RUN: llvm-readelf -x .got.plt %tno.so | FileCheck --check-prefix SOGOTPLT %s |
| # RUN: llvm-readelf --dynamic-table %tno.so | FileCheck --check-prefix NOBTIDYN %s |
| |
| # NOBTIDYN-NOT: 0x0000000070000001 (AARCH64_BTI_PLT) |
| # NOBTIDYN-NOT: 0x0000000070000003 (AARCH64_PAC_PLT) |
| |
| # NOBTI: 0000000000010000 func2: |
| # NOBTI-NEXT: 10000: bl #48 <func3@plt> |
| # NOBTI-NEXT: 10004: ret |
| # NOBTI: Disassembly of section .plt: |
| # NOBTI: 0000000000010010 .plt: |
| # NOBTI-NEXT: 10010: stp x16, x30, [sp, #-16]! |
| # NOBTI-NEXT: 10014: adrp x16, #131072 |
| # NOBTI-NEXT: 10018: ldr x17, [x16, #16] |
| # NOBTI-NEXT: 1001c: add x16, x16, #16 |
| # NOBTI-NEXT: 10020: br x17 |
| # NOBTI-NEXT: 10024: nop |
| # NOBTI-NEXT: 10028: nop |
| # NOBTI-NEXT: 1002c: nop |
| # NOBTI: 0000000000010030 func3@plt: |
| # NOBTI-NEXT: 10030: adrp x16, #131072 |
| # NOBTI-NEXT: 10034: ldr x17, [x16, #24] |
| # NOBTI-NEXT: 10038: add x16, x16, #24 |
| # NOBTI-NEXT: 1003c: br x17 |
| |
| ## Expect a bti c at the start of plt[0], the plt entries do not need bti c as |
| ## their address doesn't escape the shared object, so they can't be indirectly |
| ## called. Expect no other difference. |
| |
| # RUN: ld.lld %t1.o %t3.o --shared -o %t.so |
| # RUN: llvm-readelf -n %t.so | FileCheck --check-prefix BTIPROP %s |
| # RUN: llvm-objdump -d -mattr=+bti --no-show-raw-insn %t.so | FileCheck --check-prefix BTISO %s |
| # RUN: llvm-readelf -x .got.plt %t.so | FileCheck --check-prefix SOGOTPLT %s |
| # RUN: llvm-readelf --dynamic-table %t.so | FileCheck --check-prefix BTIDYN %s |
| |
| # BTIPROP: Properties: aarch64 feature: BTI |
| |
| # BTIDYN: 0x0000000070000001 (AARCH64_BTI_PLT) |
| # BTIDYN-NOT: 0x0000000070000003 (AARCH64_PAC_PLT) |
| |
| # BTISO: 0000000000010000 func2: |
| # BTISO-NEXT: 10000: bl #48 <func3@plt> |
| # BTISO-NEXT: 10004: ret |
| # BTISO: Disassembly of section .plt: |
| # BTISO: 0000000000010010 .plt: |
| # BTISO-NEXT: 10010: bti c |
| # BTISO-NEXT: 10014: stp x16, x30, [sp, #-16]! |
| # BTISO-NEXT: 10018: adrp x16, #131072 |
| # BTISO-NEXT: 1001c: ldr x17, [x16, #16] |
| # BTISO-NEXT: 10020: add x16, x16, #16 |
| # BTISO-NEXT: 10024: br x17 |
| # BTISO-NEXT: 10028: nop |
| # BTISO-NEXT: 1002c: nop |
| # BTISO: 0000000000010030 func3@plt: |
| # BTISO-NEXT: 10030: adrp x16, #131072 |
| # BTISO-NEXT: 10034: ldr x17, [x16, #24] |
| # BTISO-NEXT: 10038: add x16, x16, #24 |
| # BTISO-NEXT: 1003c: br x17 |
| |
| ## The .got.plt should be identical between the BTI and no BTI DSO PLT. |
| # SOGOTPLT: Hex dump of section '.got.plt' |
| # SOGOTPLT-NEXT: 0x00030000 00000000 00000000 00000000 00000000 |
| # SOGOTPLT-NEXT: 0x00030010 00000000 00000000 10000100 00000000 |
| |
| ## Build an executable with all relocatable inputs having the BTI |
| ## .note.gnu.property. We expect a bti c in front of all PLT entries as the |
| ## address of a PLT entry can escape an executable. |
| |
| # RUN: ld.lld %t2.o --shared -o %t2.so |
| |
| # RUN: ld.lld %t.o %t.so %t2.so -o %t.exe |
| # RUN: llvm-readelf --dynamic-table -n %t.exe | FileCheck --check-prefix=BTIPROP %s |
| # RUN: llvm-objdump -d -mattr=+bti --no-show-raw-insn %t.exe | FileCheck --check-prefix=EXECBTI %s |
| |
| # EXECBTI: Disassembly of section .text: |
| # EXECBTI: 0000000000210000 func1: |
| # EXECBTI-NEXT: 210000: bl #48 <func2@plt> |
| # EXECBTI-NEXT: 210004: ret |
| # EXECBTI: Disassembly of section .plt: |
| # EXECBTI: 0000000000210010 .plt: |
| # EXECBTI-NEXT: 210010: bti c |
| # EXECBTI-NEXT: 210014: stp x16, x30, [sp, #-16]! |
| # EXECBTI-NEXT: 210018: adrp x16, #131072 |
| # EXECBTI-NEXT: 21001c: ldr x17, [x16, #16] |
| # EXECBTI-NEXT: 210020: add x16, x16, #16 |
| # EXECBTI-NEXT: 210024: br x17 |
| # EXECBTI-NEXT: 210028: nop |
| # EXECBTI-NEXT: 21002c: nop |
| # EXECBTI: 0000000000210030 func2@plt: |
| # EXECBTI-NEXT: 210030: bti c |
| # EXECBTI-NEXT: 210034: adrp x16, #131072 |
| # EXECBTI-NEXT: 210038: ldr x17, [x16, #24] |
| # EXECBTI-NEXT: 21003c: add x16, x16, #24 |
| # EXECBTI-NEXT: 210040: br x17 |
| # EXECBTI-NEXT: 210044: nop |
| |
| ## We expect the same for PIE, as the address of an ifunc can escape |
| # RUN: ld.lld --pie %t.o %t.so %t2.so -o %tpie.exe |
| # RUN: llvm-readelf -n %tpie.exe | FileCheck --check-prefix=BTIPROP %s |
| # RUN: llvm-readelf --dynamic-table -n %tpie.exe | FileCheck --check-prefix=BTIPROP %s |
| # RUN: llvm-objdump -d -mattr=+bti --no-show-raw-insn %tpie.exe | FileCheck --check-prefix=PIE %s |
| |
| # PIE: Disassembly of section .text: |
| # PIE: 0000000000010000 func1: |
| # PIE-NEXT: 10000: bl #48 <func2@plt> |
| # PIE-NEXT: 10004: ret |
| # PIE: Disassembly of section .plt: |
| # PIE: 0000000000010010 .plt: |
| # PIE-NEXT: 10010: bti c |
| # PIE-NEXT: 10014: stp x16, x30, [sp, #-16]! |
| # PIE-NEXT: 10018: adrp x16, #131072 |
| # PIE-NEXT: 1001c: ldr x17, [x16, #16] |
| # PIE-NEXT: 10020: add x16, x16, #16 |
| # PIE-NEXT: 10024: br x17 |
| # PIE-NEXT: 10028: nop |
| # PIE-NEXT: 1002c: nop |
| # PIE: 0000000000010030 func2@plt: |
| # PIE-NEXT: 10030: bti c |
| # PIE-NEXT: 10034: adrp x16, #131072 |
| # PIE-NEXT: 10038: ldr x17, [x16, #24] |
| # PIE-NEXT: 1003c: add x16, x16, #24 |
| # PIE-NEXT: 10040: br x17 |
| # PIE-NEXT: 10044: nop |
| |
| ## Build and executable with not all relocatable inputs having the BTI |
| ## .note.property, expect no bti c and no .note.gnu.property entry |
| |
| # RUN: ld.lld %t.o %t2.o %t.so -o %tnobti.exe |
| # RUN: llvm-readelf --dynamic-table %tnobti.exe | FileCheck --check-prefix NOBTIDYN %s |
| # RUN: llvm-objdump -d -mattr=+bti --no-show-raw-insn %tnobti.exe | FileCheck --check-prefix=NOEX %s |
| |
| # NOEX: Disassembly of section .text: |
| # NOEX: 0000000000210000 func1: |
| # NOEX-NEXT: 210000: bl #48 <func2@plt> |
| # NOEX-NEXT: 210004: ret |
| # NOEX: 0000000000210008 func3: |
| # NOEX-NEXT: 210008: ret |
| # NOEX: Disassembly of section .plt: |
| # NOEX: 0000000000210010 .plt: |
| # NOEX-NEXT: 210010: stp x16, x30, [sp, #-16]! |
| # NOEX-NEXT: 210014: adrp x16, #131072 |
| # NOEX-NEXT: 210018: ldr x17, [x16, #16] |
| # NOEX-NEXT: 21001c: add x16, x16, #16 |
| # NOEX-NEXT: 210020: br x17 |
| # NOEX-NEXT: 210024: nop |
| # NOEX-NEXT: 210028: nop |
| # NOEX-NEXT: 21002c: nop |
| # NOEX: 0000000000210030 func2@plt: |
| # NOEX-NEXT: 210030: adrp x16, #131072 |
| # NOEX-NEXT: 210034: ldr x17, [x16, #24] |
| # NOEX-NEXT: 210038: add x16, x16, #24 |
| # NOEX-NEXT: 21003c: br x17 |
| |
| ## Force BTI entries with the --force-bti command line option. Expect a warning |
| ## from the file without the .note.gnu.property. |
| |
| # RUN: ld.lld %t.o %t2.o --force-bti %t.so -o %tforcebti.exe 2>&1 | FileCheck --check-prefix=FORCE-WARN %s |
| |
| # FORCE-WARN: aarch64-feature-bti.s.tmp2.o: --force-bti: file does not have BTI property |
| |
| |
| # RUN: llvm-readelf -n %tforcebti.exe | FileCheck --check-prefix=BTIPROP %s |
| # RUN: llvm-readelf --dynamic-table %tforcebti.exe | FileCheck --check-prefix BTIDYN %s |
| # RUN: llvm-objdump -d -mattr=+bti --no-show-raw-insn %tforcebti.exe | FileCheck --check-prefix=FORCE %s |
| |
| # FORCE: Disassembly of section .text: |
| # FORCE: 0000000000210000 func1: |
| # FORCE-NEXT: 210000: bl #48 <func2@plt> |
| # FORCE-NEXT: 210004: ret |
| # FORCE: 0000000000210008 func3: |
| # FORCE-NEXT: 210008: ret |
| # FORCE: Disassembly of section .plt: |
| # FORCE: 0000000000210010 .plt: |
| # FORCE-NEXT: 210010: bti c |
| # FORCE-NEXT: 210014: stp x16, x30, [sp, #-16]! |
| # FORCE-NEXT: 210018: adrp x16, #131072 |
| # FORCE-NEXT: 21001c: ldr x17, [x16, #16] |
| # FORCE-NEXT: 210020: add x16, x16, #16 |
| # FORCE-NEXT: 210024: br x17 |
| # FORCE-NEXT: 210028: nop |
| # FORCE-NEXT: 21002c: nop |
| # FORCE: 0000000000210030 func2@plt: |
| # FORCE-NEXT: 210030: bti c |
| # FORCE-NEXT: 210034: adrp x16, #131072 |
| # FORCE-NEXT: 210038: ldr x17, [x16, #24] |
| # FORCE-NEXT: 21003c: add x16, x16, #24 |
| # FORCE-NEXT: 210040: br x17 |
| # FORCE-NEXT: 210044: nop |
| |
| .section ".note.gnu.property", "a" |
| .long 4 |
| .long 0x10 |
| .long 0x5 |
| .asciz "GNU" |
| |
| .long 0xc0000000 // GNU_PROPERTY_AARCH64_FEATURE_1_AND |
| .long 4 |
| .long 1 // GNU_PROPERTY_AARCH64_FEATURE_1_BTI |
| .long 0 |
| |
| .text |
| .globl _start |
| .type func1,%function |
| func1: |
| bl func2 |
| ret |