# 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-pac1.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-pac.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 PAC 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=+v8.3a --no-show-raw-insn %tno.so | FileCheck --check-prefix=NOPAC %s # RUN: llvm-readelf -x .got.plt %tno.so | FileCheck --check-prefix SOGOTPLT %s # RUN: llvm-readelf --dynamic-table %tno.so | FileCheck --check-prefix NOPACDYN %s # NOPAC: 00000000000102b8 func2: # NOPAC-NEXT: 102b8: bl #56 # NOPAC-NEXT: 102bc: ret # NOPAC: Disassembly of section .plt: # NOPAC: 00000000000102d0 .plt: # NOPAC-NEXT: 102d0: stp x16, x30, [sp, #-16]! # NOPAC-NEXT: 102d4: adrp x16, #131072 # NOPAC-NEXT: 102d8: ldr x17, [x16, #960] # NOPAC-NEXT: 102dc: add x16, x16, #960 # NOPAC-NEXT: 102e0: br x17 # NOPAC-NEXT: 102e4: nop # NOPAC-NEXT: 102e8: nop # NOPAC-NEXT: 102ec: nop # NOPAC: 00000000000102f0 func3@plt: # NOPAC-NEXT: 102f0: adrp x16, #131072 # NOPAC-NEXT: 102f4: ldr x17, [x16, #968] # NOPAC-NEXT: 102f8: add x16, x16, #968 # NOPAC-NEXT: 102fc: br x17 # NOPACDYN-NOT: 0x0000000070000001 (AARCH64_BTI_PLT) # NOPACDYN-NOT: 0x0000000070000003 (AARCH64_PAC_PLT) # RUN: ld.lld %t1.o %t3.o --shared --soname=t.so -o %t.so # RUN: llvm-readelf -n %t.so | FileCheck --check-prefix PACPROP %s # RUN: llvm-objdump -d -mattr=+v8.3a --no-show-raw-insn %t.so | FileCheck --check-prefix PACSO %s # RUN: llvm-readelf -x .got.plt %t.so | FileCheck --check-prefix SOGOTPLT2 %s # RUN: llvm-readelf --dynamic-table %t.so | FileCheck --check-prefix PACDYN %s ## PAC has no effect on PLT[0], for PLT[N] autia1716 is used to authenticate ## the address in x17 (context in x16) before branching to it. The dynamic ## loader is responsible for calling pacia1716 on the entry. # PACSO: 0000000000010310 func2: # PACSO-NEXT: 10310: bl #48 # PACSO-NEXT: 10314: ret # PACSO: Disassembly of section .plt: # PACSO: 0000000000010320 .plt: # PACSO-NEXT: 10320: stp x16, x30, [sp, #-16]! # PACSO-NEXT: 10324: adrp x16, #131072 # PACSO-NEXT: 10328: ldr x17, [x16, #1080] # PACSO-NEXT: 1032c: add x16, x16, #1080 # PACSO-NEXT: 10330: br x17 # PACSO-NEXT: 10334: nop # PACSO-NEXT: 10338: nop # PACSO-NEXT: 1033c: nop # PACSO: 0000000000010340 func3@plt: # PACSO-NEXT: 10340: adrp x16, #131072 # PACSO-NEXT: 10344: ldr x17, [x16, #1088] # PACSO-NEXT: 10348: add x16, x16, #1088 # PACSO-NEXT: 1034c: autia1716 # PACSO-NEXT: 10350: br x17 # PACSO-NEXT: 10354: nop # SOGOTPLT: Hex dump of section '.got.plt': # SOGOTPLT-NEXT: 0x000303b0 00000000 00000000 00000000 00000000 # SOGOTPLT-NEXT: 0x000303c0 00000000 00000000 d0020100 00000000 # SOGOTPLT2: Hex dump of section '.got.plt': # SOGOTPLT2-NEXT: 0x00030428 00000000 00000000 00000000 00000000 # SOGOTPLT2-NEXT: 0x00030438 00000000 00000000 20030100 00000000 # PACPROP: Properties: aarch64 feature: PAC # PACDYN-NOT: 0x0000000070000001 (AARCH64_BTI_PLT) # PACDYN: 0x0000000070000003 (AARCH64_PAC_PLT) ## Turn on PAC entries with the --pac-plt command line option. There are no ## warnings in this case as the choice to use PAC in PLT entries is orthogonal ## to the choice of using PAC in relocatable objects. The presence of the PAC ## .note.gnu.property is an indication of preference by the relocatable object. # RUN: ld.lld %t.o %t2.o --pac-plt %t.so -o %tpacplt.exe # RUN: llvm-readelf -n %tpacplt.exe | FileCheck --check-prefix=PACPROP %s # RUN: llvm-readelf --dynamic-table %tpacplt.exe | FileCheck --check-prefix PACDYN %s # RUN: llvm-objdump -d -mattr=+v8.3a --no-show-raw-insn %tpacplt.exe | FileCheck --check-prefix PACPLT %s # PACPLT: Disassembly of section .text: # PACPLT: 0000000000210338 func1: # PACPLT-NEXT: 210338: bl #56 # PACPLT-NEXT: 21033c: ret # PACPLT: 0000000000210340 func3: # PACPLT-NEXT: 210340: ret # PACPLT: Disassembly of section .plt: # PACPLT: 0000000000210350 .plt: # PACPLT-NEXT: 210350: stp x16, x30, [sp, #-16]! # PACPLT-NEXT: 210354: adrp x16, #131072 # PACPLT-NEXT: 210358: ldr x17, [x16, #1144] # PACPLT-NEXT: 21035c: add x16, x16, #1144 # PACPLT-NEXT: 210360: br x17 # PACPLT-NEXT: 210364: nop # PACPLT-NEXT: 210368: nop # PACPLT-NEXT: 21036c: nop # PACPLT: 0000000000210370 func2@plt: # PACPLT-NEXT: 210370: adrp x16, #131072 # PACPLT-NEXT: 210374: ldr x17, [x16, #1152] # PACPLT-NEXT: 210378: add x16, x16, #1152 # PACPLT-NEXT: 21037c: autia1716 # PACPLT-NEXT: 210380: br x17 # PACPLT-NEXT: 210384: 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 2 // GNU_PROPERTY_AARCH64_FEATURE_1_PAC .long 0 .text .globl _start .type func1,%function func1: bl func2 ret