// 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