ef58ae86ba
GCC's name for this symbol is _mcount, which the Linux kernel expects in
a few different place:
$ echo 'int main(void) { return 0; }' | riscv32-linux-gcc -c -pg -o tmp.o -x c -
$ llvm-objdump -dr tmp.o | grep mcount
0000000c: R_RISCV_CALL _mcount
$ echo 'int main(void) { return 0; }' | riscv64-linux-gcc -c -pg -o tmp.o -x c -
$ llvm-objdump -dr tmp.o | grep mcount
000000000000000c: R_RISCV_CALL _mcount
$ echo 'int main(void) { return 0; }' | clang -c -pg -o tmp.o --target=riscv32-linux-gnu -x c -
$ llvm-objdump -dr tmp.o | grep mcount
0000000a: R_RISCV_CALL_PLT mcount
$ echo 'int main(void) { return 0; }' | clang -c -pg -o tmp.o --target=riscv64-linux-gnu -x c -
$ llvm-objdump -dr tmp.o | grep mcount
000000000000000a: R_RISCV_CALL_PLT mcount
Set MCountName to "_mcount" in RISCVTargetInfo then prevent it from
getting overridden in certain OSTargetInfo constructors.
Reviewed By: MaskRay
Differential Revision: https://reviews.llvm.org/D98881
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
59 lines
4.0 KiB
C
59 lines
4.0 KiB
C
// RUN: %clang_cc1 -pg -triple i386-unknown-unknown -emit-llvm -o - %s | FileCheck %s
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// RUN: %clang_cc1 -pg -triple i386-unknown-unknown -emit-llvm -O2 -o - %s | FileCheck %s
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// RUN: %clang_cc1 -pg -triple powerpc-unknown-gnu-linux -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
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// RUN: %clang_cc1 -pg -triple powerpc64-unknown-gnu-linux -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
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// RUN: %clang_cc1 -pg -triple powerpc64le-unknown-gnu-linux -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
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// RUN: %clang_cc1 -pg -triple i386-netbsd -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-DOUBLE-PREFIXED,NO-MCOUNT1 %s
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// RUN: %clang_cc1 -pg -triple x86_64-netbsd -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-DOUBLE-PREFIXED,NO-MCOUNT1 %s
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// RUN: %clang_cc1 -pg -triple arm-netbsd-eabi -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-DOUBLE-PREFIXED,NO-MCOUNT1 %s
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// RUN: %clang_cc1 -pg -triple aarch64-netbsd -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-DOUBLE-PREFIXED,NO-MCOUNT1 %s
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// RUN: %clang_cc1 -pg -triple mips-netbsd -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-DOUBLE-PREFIXED,NO-MCOUNT1 %s
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// RUN: %clang_cc1 -pg -triple mips-unknown-gnu-linux -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
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// RUN: %clang_cc1 -pg -triple mipsel-unknown-gnu-linux -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
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// RUN: %clang_cc1 -pg -triple mips64-unknown-gnu-linux -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
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// RUN: %clang_cc1 -pg -triple mips64el-unknown-gnu-linux -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
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// RUN: %clang_cc1 -pg -triple riscv32-elf -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
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// RUN: %clang_cc1 -pg -triple riscv64-elf -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
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// RUN: %clang_cc1 -pg -triple riscv32-linux -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
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// RUN: %clang_cc1 -pg -triple riscv64-linux -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
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// RUN: %clang_cc1 -pg -triple riscv64-freebsd -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
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// RUN: %clang_cc1 -pg -triple riscv64-freebsd -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
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// RUN: %clang_cc1 -pg -triple riscv64-openbsd -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-PREFIXED,NO-MCOUNT1 %s
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// RUN: %clang_cc1 -pg -triple powerpc-netbsd -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-DOUBLE-PREFIXED,NO-MCOUNT1 %s
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// RUN: %clang_cc1 -pg -triple powerpc64-netbsd -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-DOUBLE-PREFIXED,NO-MCOUNT1 %s
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// RUN: %clang_cc1 -pg -triple powerpc64le-netbsd -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-DOUBLE-PREFIXED,NO-MCOUNT1 %s
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// RUN: %clang_cc1 -pg -triple sparc-netbsd -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-DOUBLE-PREFIXED,NO-MCOUNT1 %s
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// RUN: %clang_cc1 -pg -triple sparc64-netbsd -emit-llvm -o - %s | FileCheck -check-prefixes=CHECK-DOUBLE-PREFIXED,NO-MCOUNT1 %s
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// RUN: %clang_cc1 -emit-llvm -o - %s | FileCheck %s -check-prefix=NO-MCOUNT
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int bar(void) {
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return 0;
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}
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int foo(void) {
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return bar();
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}
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int __attribute__((no_instrument_function)) no_instrument(void) {
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return foo();
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}
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int main(void) {
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return no_instrument();
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}
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// CHECK: call void @mcount
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// CHECK: call void @mcount
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// CHECK: call void @mcount
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// CHECK-NOT: call void @mcount
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// CHECK-PREFIXED: call void @_mcount
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// CHECK-PREFIXED: call void @_mcount
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// CHECK-PREFIXED: call void @_mcount
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// CHECK-PREFIXED-NOT: call void @_mcount
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// CHECK-DOUBLE-PREFIXED: call void @__mcount
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// CHECK-DOUBLE-PREFIXED: call void @__mcount
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// CHECK-DOUBLE-PREFIXED: call void @__mcount
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// CHECK-DOUBLE-PREFIXED-NOT: call void @__mcount
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// NO-MCOUNT-NOT: call void @{{.*}}mcount
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// NO-MCOUNT1-NOT: call void @{{.*}}mcount
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