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llvm-project/lld/test/ELF/arm-static-defines.s

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[ELF] Move `// REQUIRES:` line to the top llvm-svn: 335676
2018-06-27 06:20:04 +08:00
// REQUIRES: arm
[ELF] Synthetic symbol definitions for ARM static linking When static linking in ARM (like Mips) __tls_get_addr is defined by the library so we should not define it as a synthetic. We also need to add __exidx_start and __exidx_end for the .ARM.exidx section as the static libc library startup code is expecting them to be defined by the default linker script for static linking on ARM. Differential revision: https://reviews.llvm.org/D25978 llvm-svn: 285279
2016-10-27 18:28:53 +08:00
// RUN: llvm-mc -filetype=obj -triple=armv7a-none-linux-gnueabi %s -o %t
[ARM][test] Improve tests Delete trailing 2>&1 that is not piped to another command. Add --no-show-raw-insn to objdump -d commands. llvm-svn: 366676
2019-07-22 19:37:03 +08:00
// RUN: ld.lld --no-merge-exidx-entries %t --static -o %t2
[ELF] Synthetic symbol definitions for ARM static linking When static linking in ARM (like Mips) __tls_get_addr is defined by the library so we should not define it as a synthetic. We also need to add __exidx_start and __exidx_end for the .ARM.exidx section as the static libc library startup code is expecting them to be defined by the default linker script for static linking on ARM. Differential revision: https://reviews.llvm.org/D25978 llvm-svn: 285279
2016-10-27 18:28:53 +08:00
// RUN: llvm-readobj --symbols %t2 | FileCheck %s
// Check that on ARM we don't get a multiply defined symbol for __tls_get_addr
// and undefined symbols for references to __exidx_start and __exidx_end
.syntax unified
.section .text
.global __tls_get_addr
__tls_get_addr:
bx lr
.global _start
.global __exidx_start
.global __exidx_end
_start:
.fnstart
bx lr
.word __exidx_start
.word __exidx_end
.cantunwind
.fnend
// CHECK: Name: __exidx_end
[ELF] Add terminating sentinel .ARM.exidx table entry The .ARM.exidx table has an entry for each function with the first entry giving the start address of the function, the table is sorted in ascending order of function address. Given a PC value, the unwinder will search the table for the entry that contains the PC value. If the table entry happens to be the last, the range of the addresses that the final unwinding table describes will extend to the end of the address space. To prevent an incorrect address outside the address range of the program matching the last entry we follow ld.bfd's example and add a sentinel EXIDX_CANTUNWIND entry at the end of the table. This gives the final real table entry an upper bound. In addition the llvm libunwind unwinder currently depends on the presence of a sentinel entry (PR31091). Differential revision: https://reviews.llvm.org/D26977 llvm-svn: 287869
2016-11-24 19:43:55 +08:00
// CHECK-NEXT: Value: 0x100E4
[ELF] Synthetic symbol definitions for ARM static linking When static linking in ARM (like Mips) __tls_get_addr is defined by the library so we should not define it as a synthetic. We also need to add __exidx_start and __exidx_end for the .ARM.exidx section as the static libc library startup code is expecting them to be defined by the default linker script for static linking on ARM. Differential revision: https://reviews.llvm.org/D25978 llvm-svn: 285279
2016-10-27 18:28:53 +08:00
// CHECK-NEXT: Size: 0
// CHECK-NEXT: Binding: Local
// CHECK-NEXT: Type: None
// CHECK-NEXT: Other [
// CHECK-NEXT: STV_HIDDEN
// CHECK-NEXT: ]
// CHECK-NEXT: Section: .ARM.exidx
// CHECK: Name: __exidx_start
// CHECK-NEXT: Value: 0x100D4
// CHECK-NEXT: Size: 0
// CHECK-NEXT: Binding: Local
// CHECK-NEXT: Type: None
// CHECK-NEXT: Other [
// CHECK-NEXT: STV_HIDDEN
// CHECK-NEXT: ]
// CHECK-NEXT: Section: .ARM.exidx
// CHECK: Symbol {
// CHECK-NEXT: Name: __tls_get_addr