ppc64-long-branch-pi.s 3.19 KB
# REQUIRES: ppc
# RUN: llvm-mc -filetype=obj -triple=ppc64le %s -o %t.o
# RUN: echo 'SECTIONS { \
# RUN:       .text_low 0x2000: { *(.text_low) } \
# RUN:       .text_high 0x2002000 : { *(.text_high) } \
# RUN:       }' > %t.script
# RUN: ld.lld -pie -T %t.script %t.o -o %t
# RUN: llvm-readelf -S %t | FileCheck --check-prefix=SEC-PIE %s
# RUN: llvm-readobj -r %t | FileCheck --check-prefix=RELOC %s
# RUN: llvm-objdump -d --no-show-raw-insn %t | FileCheck %s

# RUN: ld.lld -shared -T %t.script %t.o -o %t.so
# RUN: llvm-readelf -S %t.so | FileCheck --check-prefix=SEC-SHARED %s
# RUN: llvm-objdump -d --no-show-raw-insn %t.so | FileCheck %s

# SEC-PIE:    Name       Type     Address          Off     Size   ES Flg Lk Inf Al
# SEC-PIE:    .got       PROGBITS 00000000020020e0 20120e0 000008 00  WA  0   0  8
# SEC-PIE:    .branch_lt NOBITS   00000000020020f0 20120f0 000020 00  WA  0   0  8

# SEC-SHARED: Name       Type     Address          Off     Size   ES Flg Lk Inf Al
# SEC-SHARED: .got       PROGBITS 00000000020020d0 20120d0 000008 00  WA  0   0  8
# SEC-SHARED: .branch_lt NOBITS   00000000020020e0 20120e0 000020 00  WA  0   0  8

# RELOC:      .rela.dyn {
# RELOC-NEXT:   0x20020E8 R_PPC64_RELATIVE - 0x8000
# RELOC-NEXT:   0x20020F0 R_PPC64_RELATIVE - 0x2002000
# RELOC-NEXT:   0x20020F8 R_PPC64_RELATIVE - 0x2002008
# RELOC-NEXT:   0x2002100 R_PPC64_RELATIVE - 0x200200C
# RELOC-NEXT:   0x2002108 R_PPC64_RELATIVE - 0x2000
# RELOC-NEXT: }

# CHECK:      _start:
# CHECK-NEXT:     2000:       bl .+16
# CHECK-NEXT:                 bl .+33554428
# CHECK-NEXT:                 bl .+24
# CHECK-NEXT:                 bl .+36

## &.branch_lt[0] - .TOC. = .branch_lt - (.got+0x8000) = -32752
# CHECK:      __long_branch_:
# CHECK-NEXT:     2010:       addis 12, 2, 0
# CHECK-NEXT:                 ld 12, -32752(12)
# CHECK-NEXT:                 mtctr 12
# CHECK-NEXT:                 bctr

## &.branch_lt[1] - .TOC. = .branch_lt - (.got+0x8000) = -32744
# CHECK:      __long_branch_:
# CHECK-NEXT:     2020:       addis 12, 2, 0
# CHECK-NEXT:                 ld 12, -32744(12)
# CHECK-NEXT:                 mtctr 12
# CHECK-NEXT:                 bctr

## &.branch_lt[2] - .TOC. = .branch_lt - (.got+0x8000) = -32736
# CHECK:      __long_branch_:
# CHECK-NEXT:     2030:       addis 12, 2, 0
# CHECK-NEXT:                 ld 12, -32736(12)
# CHECK-NEXT:                 mtctr 12
# CHECK-NEXT:                 bctr

.section .text_low, "ax", %progbits
.globl _start
_start:
bl .text_high     # Need a thunk
bl .text_high
bl .text_high+8   # Need a thunk
bl .text_high+0xc # Need a thunk

# CHECK:      high_target:
# CHECK-NEXT:  2002000:   bl .-33554428
# CHECK-NEXT:             bl .-33554432
# CHECK-NEXT:             bl .+8

## &.branch_lt[3] - .TOC. = .branch_lt - (.got+0x8000) = -32728
# CHECK:      __long_branch_:
# CHECK-NEXT:  2002010:       addis 12, 2, 0
# CHECK-NEXT:                 ld 12, -32728(12)
# CHECK-NEXT:                 mtctr 12
# CHECK-NEXT:                 bctr

.section .text_high, "ax", %progbits
high_target:
bl .text_low+4
bl .text_low+4
bl .text_low      # Need a thunk
blr

## Force creation of .got
## The R_PPC64_RELATIVE makes sure .rela.dyn survives removeUnusedSyntheticSections.
.section .data
.quad .TOC.@tocbase