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llvm-project/lld/test/ELF/arm-exidx-synthetic-link.s

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[ELF][ARM] Recommit Redesign of .ARM.exidx handling to use a SyntheticSection Recommit r356666 with fixes for buildbot failure, as well as handling for --emit-relocs, which we decide not to emit any relocation sections as the table is already position independent and an offline tool can deduce the relocations. Instead of creating extra Synthetic .ARM.exidx sections to account for gaps in the table, create a single .ARM.exidx SyntheticSection that can derive the contents of the gaps from a sorted list of the executable InputSections. This has the benefit of moving the ARM specific code for SyntheticSections in SHF_LINK_ORDER processing and the table merging code into the ARM specific SyntheticSection. This also makes it easier to create EXIDX_CANTUNWIND table entries for executable InputSections that don't have an associated .ARM.exidx section. Fixes pr40277 Differential Revision: https://reviews.llvm.org/D59216 llvm-svn: 357160
2019-03-28 19:10:20 +08:00
// REQUIRES: arm
// RUN: llvm-mc -filetype=obj -arm-add-build-attributes -triple=armv7a-none-linux-gnueabi %s -o %t.o
// RUN: ld.lld %t.o -o %t.so -shared
[test] Change llvm-readobj -long-option to --long-option or well-known short options. NFC Also change some options that have different semantics (cause confusion) in llvm-readelf mode: -s => -S -t => --symbols -sd => --section-data llvm-svn: 359651
2019-05-01 13:49:01 +08:00
// RUN: llvm-readobj -S %t.so | FileCheck %s
[ELF][ARM] Recommit Redesign of .ARM.exidx handling to use a SyntheticSection Recommit r356666 with fixes for buildbot failure, as well as handling for --emit-relocs, which we decide not to emit any relocation sections as the table is already position independent and an offline tool can deduce the relocations. Instead of creating extra Synthetic .ARM.exidx sections to account for gaps in the table, create a single .ARM.exidx SyntheticSection that can derive the contents of the gaps from a sorted list of the executable InputSections. This has the benefit of moving the ARM specific code for SyntheticSections in SHF_LINK_ORDER processing and the table merging code into the ARM specific SyntheticSection. This also makes it easier to create EXIDX_CANTUNWIND table entries for executable InputSections that don't have an associated .ARM.exidx section. Fixes pr40277 Differential Revision: https://reviews.llvm.org/D59216 llvm-svn: 357160
2019-03-28 19:10:20 +08:00
// Test that when all the .ARM.exidx sections are merged into a single
// synthetic EXIDX_CANTUNWIND entry we can still set the SHF_LINK_ORDER
// link.
.syntax unified
.section .text.1, "ax", %progbits
.globl f1
.type f1, %function
f1:
bx lr
.section .text.2, "ax", %progbits
.globl f2
.type f2, %function
f2:
.fnstart
bx lr
.cantunwind
.fnend
// CHECK: Name: .ARM.exidx
// CHECK-NEXT: Type: SHT_ARM_EXIDX
// CHECK-NEXT: Flags [
// CHECK-NEXT: SHF_ALLOC
// CHECK-NEXT: SHF_LINK_ORDER
// CHECK-NEXT: ]
// CHECK-NEXT: Address:
// CHECK-NEXT: Offset:
// CHECK-NEXT: Size:
// CHECK-NEXT: Link: [[INDEX:.*]]
// CHECK: Index: [[INDEX]]
// CHECK-NEXT: Name: .text