729d29e167
This patch changes patchELFAllocatableRelaSections from going through old relocations sections and update the relocation offsets to emitting the relocations stored in binary sections. This is needed in case we would like to remove and add dynamic relocations during BOLT work and it is used by golang support pass. Note: Currently we emit relocations in the old sections, so the total number of them should be equal or less of old number. Testing: No special tests are neeeded, since this patch does not fix anything or add new functionality (it only prepares to add). Every PIC-compiled test binary will use this code and thus become a test. But just in case the aarch64 dynamic relocations tests were added. Vladislav Khmelevsky, Advanced Software Technology Lab, Huawei Reviewed By: maksfb Differential Revision: https://reviews.llvm.org/D117612
65 lines
2.3 KiB
C
65 lines
2.3 KiB
C
// This test checks dynamic relocations support for aarch64.
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// RUN: %clang %cflags -pie -fPIC %S/Inputs/runtime_relocs.c \
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// RUN: -shared -fuse-ld=lld -o %t.so -Wl,-q -Wl,-soname=rel.so
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// RUN: %clang %cflags -no-pie %s -fuse-ld=lld \
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// RUN: -o %t.exe -Wl,-q %t.so
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// RUN: llvm-bolt %t.so -o %t.bolt.so -use-old-text=0 -lite=0
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// RUN: llvm-bolt %t.exe -o %t.bolt.exe -use-old-text=0 -lite=0
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// RUN: LD_PRELOAD=%t.bolt.so %t.bolt.exe
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// Check relocations in library:
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//
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// RUN: llvm-readelf -r %t.bolt.so | FileCheck %s -check-prefix=CHECKLIB
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//
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// CHECKLIB: 0000000600000401 R_AARCH64_GLOB_DAT {{.*}} a + 0
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// CHECKLIB: 0000000700000407 R_AARCH64_TLSDESC {{.*}} t1 + 0
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// CHECKLIB: 0000000600000101 R_AARCH64_ABS64 {{.*}} a + 0
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// Check relocations in executable:
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//
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// RUN: llvm-readelf -r %t.bolt.exe | FileCheck %s -check-prefix=CHECKEXE
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//
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// CHECKEXE: 0000000600000406 R_AARCH64_TLS_TPREL64 {{.*}} t1 + 0
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// CHECKEXE: 0000000800000400 R_AARCH64_COPY {{.*}} a + 0
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// CHECKEXE: 0000000700000402 R_AARCH64_JUMP_SLOT {{.*}} inc + 0
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// Check traditional TLS relocations R_AARCH64_TLS_DTPMOD64 and
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// R_AARCH64_TLS_DTPREL64 emitted correctly after bolt. Since these
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// relocations are obsolete and clang and lld does not support them,
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// the initial binary was built with gcc and ld with -mtls-dialect=trad flag.
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//
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// RUN: yaml2obj %p/Inputs/tls_trad.yaml &> %t.trad.so
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// RUN: llvm-bolt %t.trad.so -o %t.trad.bolt.so -use-old-text=0 -lite=0
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// RUN: llvm-readelf -r %t.trad.so | FileCheck %s -check-prefix=CHECKTRAD
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//
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// CHECKTRAD: 0000000100000404 R_AARCH64_TLS_DTPMOD64 {{.*}} t1 + 0
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// CHECKTRAD: 0000000100000405 R_AARCH64_TLS_DTPREL64 {{.*}} t1 + 0
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// The ld linker emits R_AARCH64_TLSDESC to .rela.plt section, check that
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// it is emitted correctly.
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//
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// RUN: yaml2obj %p/Inputs/tls_ld.yaml &> %t.ld.so
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// RUN: llvm-bolt %t.ld.so -o %t.ld.bolt.so -use-old-text=0 -lite=0
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// RUN: llvm-readelf -r %t.ld.bolt.so | FileCheck %s -check-prefix=CHECKLD
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//
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// CHECKLD: 0000000100000407 R_AARCH64_TLSDESC {{.*}} t1 + 0
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extern int a; // R_*_COPY
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extern __thread int t1; // R_*_TLS_TPREL64
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int inc(int a); // R_*_JUMP_SLOT
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int dec(int a) { return a - 1; }
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void *resolver() { return dec; }
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int ifuncDec(int a) __attribute__((ifunc("resolver"))); // R_*_IRELATIVE
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int main() {
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++t1;
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ifuncDec(a);
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inc(a);
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}
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