# RUN: rm -rf %t && mkdir -p %t/armv6 && mkdir -p %t/armv7 && mkdir -p %t/thumbv7
# RUN: llvm-mc -triple=armv6-none-linux-gnueabi -arm-add-build-attributes -filetype=obj -o %t/armv6/out.o %s
# RUN: llvm-objdump -r %t/armv6/out.o | FileCheck --check-prefix=CHECK-TYPE %s
# RUN: llvm-jitlink -noexec -slab-address 0x76ff0000 -slab-allocate 10Kb -slab-page-size 4096 \
# RUN: -abs target=0x76bbe88f -check %s %t/armv6/out.o
# RUN: llvm-mc -triple=armv7-none-linux-gnueabi -arm-add-build-attributes -filetype=obj -o %t/armv7/out.o %s
# RUN: llvm-objdump -r %t/armv7/out.o | FileCheck --check-prefix=CHECK-TYPE %s
# RUN: llvm-jitlink -noexec -slab-address 0x76ff0000 -slab-allocate 10Kb -slab-page-size 4096 \
# RUN: -abs target=0x76bbe88f -check %s %t/armv7/out.o
# RUN: llvm-mc -triple=thumbv7-none-linux-gnueabi -arm-add-build-attributes -filetype=obj -o %t/thumbv7/out.o %s
# RUN: llvm-objdump -r %t/thumbv7/out.o | FileCheck --check-prefix=CHECK-TYPE %s
# RUN: llvm-jitlink -noexec -slab-address 0x76ff0000 -slab-allocate 10Kb -slab-page-size 4096 \
# RUN: -abs target=0x76bbe88f -check %s %t/thumbv7/out.o
.data
.global target
.text
.syntax unified
# CHECK-TYPE: {{[0-9a-f]+}} R_ARM_ABS32 target
# jitlink-check: *{4}(abs32) = target
.global abs32
abs32:
.word target
.size abs32, .-abs32
# CHECK-TYPE: {{[0-9a-f]+}} R_ARM_REL32 target
# jitlink-check: (rel32 + *{4}(rel32))[31:0] = target
.global rel32
rel32:
.word target - .
.size rel32, .-rel32
# CHECK-TYPE: {{[0-9a-f]+}} R_ARM_TARGET1 target
# jitlink-check: *{4}(target1_abs32) = target
.global target1_abs32
target1_abs32:
.word target(target1)
.size target1_abs32, .-target1_abs32
# CHECK-TYPE: {{[0-9a-f]+}} R_ARM_GOT_PREL target
#
# The GOT entry contains the absolute address of the external:
# jitlink-check: *{4}(got_addr(out.o, target)) = target
#
# The embedded offset value contains the offset to the GOT entry relative to pc.
# The +12 accounts for the ARM branch offset (8) and the .LPC offset (4), which
# is stored as initial addend inline.
# FIXME: We shouldn't need to substract the 64-bit sign-extension manually.
# jitlink-check: *{4}got_prel_offset = got_addr(out.o, target) - (next_pc(got_prel) + 4) - 0xffffffff00000000
.globl got_prel
.type got_prel,%function
.p2align 2
.code 32
got_prel:
ldr r0, .LCPI
.LPC:
ldr r0, [pc, r0]
ldr r0, [r0]
bx lr
# Actual relocation site is on the embedded offset value:
.globl got_prel_offset
got_prel_offset:
.LCPI:
.long target(GOT_PREL)-((.LPC+8)-.LCPI)
.size got_prel_offset, .-got_prel_offset
.size got_prel, .-got_prel
# EH personality routine in .ARM.exidx
# CHECK-TYPE: {{[0-9a-f]+}} R_ARM_NONE __aeabi_unwind_cpp_pr0
.globl __aeabi_unwind_cpp_pr0
.type __aeabi_unwind_cpp_pr0,%function
.align 2
__aeabi_unwind_cpp_pr0:
bx lr
# CHECK-TYPE: {{[0-9a-f]+}} R_ARM_PREL31 .text
#
# An .ARM.exidx table entry is 8-bytes in size, made up of 2 4-byte entries.
# First word contains offset to function for this entry:
# jitlink-check: (*{4}section_addr(out.o, .ARM.exidx))[31:0] = prel31 - section_addr(out.o, .ARM.exidx)
#
# Most-significant bit in second word denotes inline entry when set (and
# relocation to .ARM.extab otherwise). Inline entry with compact model index 0:
# 0x9b vsp = r11
# 0x84 0x80 pop {r11, r14}
#
# jitlink-check: *{4}(section_addr(out.o, .ARM.exidx) + 4) = 0x809b8480
#
.globl prel31
.type prel31,%function
.align 2
prel31:
.fnstart
.save {r11, lr}
push {r11, lr}
.setfp r11, sp
mov r11, sp
pop {r11, lr}
mov pc, lr
.fnend
.size prel31,.-prel31
# This test is executable with any 4-byte external target:
# > echo "unsigned target = 42;" | clang -target armv7-linux-gnueabihf -o target.o -c -xc -
# > llvm-jitlink target.o armv7/out.o
#
.globl main
.type main, %function
.p2align 2
main:
push {lr}
bl got_prel
bl prel31
pop {pc}
.size main, .-main
Codebase Browser
llvm