forked from OSchip/llvm-project
33 lines
1.2 KiB
ArmAsm
33 lines
1.2 KiB
ArmAsm
// REQUIRES: x86
|
|
// RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o
|
|
// RUN: ld.lld %t.o -shared -o %t.so
|
|
// RUN: llvm-readelf -s %t.so | FileCheck %s -check-prefix=SECTION
|
|
// RUN: llvm-objdump -d %t.so | FileCheck %s
|
|
|
|
// SECTION: .dynamic DYNAMIC 0000000000003000
|
|
// SECTION: .got PROGBITS 0000000000003070 003070 000000
|
|
|
|
// All the _GLOBAL_OFFSET_TABLE_ occurrences below refer to the address
|
|
// of GOT base, not the address of the symbol _GLOBAL_OFFSET_TABLE_. These
|
|
// instructions are special and produce GOT base relative relocations. We
|
|
// currently use .got end as the GOT base, which is not equal to
|
|
// the address of the special symbol _GLOBAL_OFFSET_TABLE_.
|
|
|
|
// The assembly is generated by
|
|
// gcc -O2 -S -mcmodel=medium -fPIC a.c
|
|
// This computes the pc-relative address (runtime address) of _DYNAMIC.
|
|
//
|
|
// extern long _DYNAMIC[] __attribute__((visibility("hidden")));
|
|
// long* dynamic() { return _DYNAMIC; }
|
|
|
|
// 0x3070 (.got end) - 0x1007 = 8297
|
|
// 0x3000 (_DYNAMIC) - 0x3070 (.got end) = -112
|
|
// CHECK: 1000: {{.*}} leaq 8297(%rip), %rdx
|
|
// CHECK-NEXT: 1007: {{.*}} movabsq $-112, %rax
|
|
.global dynamic
|
|
dynamic:
|
|
leaq _GLOBAL_OFFSET_TABLE_(%rip), %rdx
|
|
movabsq $_DYNAMIC@GOTOFF, %rax
|
|
addq %rdx, %rax
|
|
ret
|