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[asan] Preserve flags in asm instrumentation.

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Patch by Yuri Gorshenin.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208296 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evgeniy Stepanov 2014-05-08 09:55:24 +00:00
parent 01ce4b98ce
commit 89329e902c
4 changed files with 68 additions and 44 deletions
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40
lib/Target/X86/AsmParser/X86AsmInstrumentation.cpp
View File

@ -177,13 +177,26 @@ public:
MCStreamer &Out) override;
};
void X86AddressSanitizer64::InstrumentMemOperandImpl(
X86Operand *Op, unsigned AccessSize, bool IsWrite, MCContext &Ctx,
MCStreamer &Out) {
void X86AddressSanitizer64::InstrumentMemOperandImpl(X86Operand *Op,
unsigned AccessSize,
bool IsWrite,
MCContext &Ctx,
MCStreamer &Out) {
// FIXME: emit .cfi directives for correct stack unwinding.
// Set %rsp below current red zone (128 bytes wide)
EmitInstruction(Out, MCInstBuilder(X86::SUB64ri32).addReg(X86::RSP)
.addReg(X86::RSP).addImm(128));
// Set %rsp below current red zone (128 bytes wide) using LEA instruction to
// preserve flags.
{
MCInst Inst;
Inst.setOpcode(X86::LEA64r);
Inst.addOperand(MCOperand::CreateReg(X86::RSP));
const MCExpr *Disp = MCConstantExpr::Create(-128, Ctx);
X86Operand *Op =
X86Operand::CreateMem(0, Disp, X86::RSP, 0, 1, SMLoc(), SMLoc());
Op->addMemOperands(Inst, 5);
EmitInstruction(Out, Inst);
}
EmitInstruction(Out, MCInstBuilder(X86::PUSH64r).addReg(X86::RDI));
{
MCInst Inst;
@ -200,8 +213,19 @@ void X86AddressSanitizer64::InstrumentMemOperandImpl(
EmitInstruction(Out, MCInstBuilder(X86::CALL64pcrel32).addExpr(FuncExpr));
}
EmitInstruction(Out, MCInstBuilder(X86::POP64r).addReg(X86::RDI));
EmitInstruction(Out, MCInstBuilder(X86::ADD64ri32).addReg(X86::RSP)
.addReg(X86::RSP).addImm(128));
// Restore old %rsp value.
{
MCInst Inst;
Inst.setOpcode(X86::LEA64r);
Inst.addOperand(MCOperand::CreateReg(X86::RSP));
const MCExpr *Disp = MCConstantExpr::Create(128, Ctx);
X86Operand *Op =
X86Operand::CreateMem(0, Disp, X86::RSP, 0, 1, SMLoc(), SMLoc());
Op->addMemOperands(Inst, 5);
EmitInstruction(Out, Inst);
}
}
} // End anonymous namespace

40
test/Instrumentation/AddressSanitizer/X86/asm_mov.ll
View File

@ -4,19 +4,19 @@ target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f3
target triple = "x86_64-unknown-linux-gnu"
; CHECK-LABEL: mov1b
; CHECK: subq $128, %rsp
; CHECK: leaq -128(%rsp), %rsp
; CHECK-NEXT: pushq %rdi
; CHECK-NEXT: leaq {{.*}}, %rdi
; CHECK-NEXT: callq __sanitizer_sanitize_load1@PLT
; CHECK-NEXT: popq %rdi
; CHECK-NEXT: addq $128, %rsp
; CHECK-NEXT: leaq 128(%rsp), %rsp
; CHECK: subq $128, %rsp
; CHECK: leaq -128(%rsp), %rsp
; CHECK-NEXT: pushq %rdi
; CHECK-NEXT: leaq {{.*}}, %rdi
; CHECK-NEXT: callq __sanitizer_sanitize_store1@PLT
; CHECK-NEXT: popq %rdi
; CHECK-NEXT: addq $128, %rsp
; CHECK-NEXT: leaq 128(%rsp), %rsp
; CHECK: movb {{.*}}, {{.*}}
define void @mov1b(i8* %dst, i8* %src) #0 {
@ -26,19 +26,19 @@ entry:
}
; CHECK-LABEL: mov2b
; CHECK: subq $128, %rsp
; CHECK: leaq -128(%rsp), %rsp
; CHECK-NEXT: pushq %rdi
; CHECK-NEXT: leaq {{.*}}, %rdi
; CHECK-NEXT: callq __sanitizer_sanitize_load2@PLT
; CHECK-NEXT: popq %rdi
; CHECK-NEXT: addq $128, %rsp
; CHECK-NEXT: leaq 128(%rsp), %rsp
; CHECK: subq $128, %rsp
; CHECK: leaq -128(%rsp), %rsp
; CHECK-NEXT: pushq %rdi
; CHECK-NEXT: leaq {{.*}}, %rdi
; CHECK-NEXT: callq __sanitizer_sanitize_store2@PLT
; CHECK-NEXT: popq %rdi
; CHECK-NEXT: addq $128, %rsp
; CHECK-NEXT: leaq 128(%rsp), %rsp
; CHECK: movw {{.*}}, {{.*}}
define void @mov2b(i16* %dst, i16* %src) #0 {
@ -48,19 +48,19 @@ entry:
}
; CHECK-LABEL: mov4b
; CHECK: subq $128, %rsp
; CHECK: leaq -128(%rsp), %rsp
; CHECK-NEXT: pushq %rdi
; CHECK-NEXT: leaq {{.*}}, %rdi
; CHECK-NEXT: callq __sanitizer_sanitize_load4@PLT
; CHECK-NEXT: popq %rdi
; CHECK-NEXT: addq $128, %rsp
; CHECK-NEXT: leaq 128(%rsp), %rsp
; CHECK: subq $128, %rsp
; CHECK: leaq -128(%rsp), %rsp
; CHECK-NEXT: pushq %rdi
; CHECK-NEXT: leaq {{.*}}, %rdi
; CHECK-NEXT: callq __sanitizer_sanitize_store4@PLT
; CHECK-NEXT: popq %rdi
; CHECK-NEXT: addq $128, %rsp
; CHECK-NEXT: leaq 128(%rsp), %rsp
; CHECK: movl {{.*}}, {{.*}}
define void @mov4b(i32* %dst, i32* %src) #0 {
@ -70,19 +70,19 @@ entry:
}
; CHECK-LABEL: mov8b
; CHECK: subq $128, %rsp
; CHECK: leaq -128(%rsp), %rsp
; CHECK-NEXT: pushq %rdi
; CHECK-NEXT: leaq {{.*}}, %rdi
; CHECK-NEXT: callq __sanitizer_sanitize_load8@PLT
; CHECK-NEXT: popq %rdi
; CHECK-NEXT: addq $128, %rsp
; CHECK-NEXT: leaq 128(%rsp), %rsp
; CHECK: subq $128, %rsp
; CHECK: leaq -128(%rsp), %rsp
; CHECK-NEXT: pushq %rdi
; CHECK-NEXT: leaq {{.*}}, %rdi
; CHECK-NEXT: callq __sanitizer_sanitize_store8@PLT
; CHECK-NEXT: popq %rdi
; CHECK-NEXT: addq $128, %rsp
; CHECK-NEXT: leaq 128(%rsp), %rsp
; CHECK: movq {{.*}}, {{.*}}
define void @mov8b(i64* %dst, i64* %src) #0 {
@ -92,19 +92,19 @@ entry:
}
; CHECK-LABEL: mov16b
; CHECK: subq $128, %rsp
; CHECK: leaq -128(%rsp), %rsp
; CHECK-NEXT: pushq %rdi
; CHECK-NEXT: leaq {{.*}}, %rdi
; CHECK-NEXT: callq __sanitizer_sanitize_load16@PLT
; CHECK-NEXT: popq %rdi
; CHECK-NEXT: addq $128, %rsp
; CHECK-NEXT: leaq 128(%rsp), %rsp
; CHECK: subq $128, %rsp
; CHECK: leaq -128(%rsp), %rsp
; CHECK-NEXT: pushq %rdi
; CHECK-NEXT: leaq {{.*}}, %rdi
; CHECK-NEXT: callq __sanitizer_sanitize_store16@PLT
; CHECK-NEXT: popq %rdi
; CHECK-NEXT: addq $128, %rsp
; CHECK-NEXT: leaq 128(%rsp), %rsp
; CHECK: movaps {{.*}}, {{.*}}
define void @mov16b(<2 x i64>* %dst, <2 x i64>* %src) #0 {

16
test/Instrumentation/AddressSanitizer/X86/asm_mov.s
View File

@ -6,21 +6,21 @@
.type mov1b,@function
# CHECK-LABEL: mov1b:
#
# CHECK: subq $128, %rsp
# CHECK: leaq -128(%rsp), %rsp
# CHECK-NEXT: pushq %rdi
# CHECK-NEXT: leaq (%rsi), %rdi
# CHECK-NEXT: callq __sanitizer_sanitize_load1@PLT
# CHECK-NEXT: popq %rdi
# CHECK-NEXT: addq $128, %rsp
# CHECK-NEXT: leaq 128(%rsp), %rsp
#
# CHECK-NEXT: movb (%rsi), %al
#
# CHECK-NEXT: subq $128, %rsp
# CHECK-NEXT: leaq -128(%rsp), %rsp
# CHECK-NEXT: pushq %rdi
# CHECK-NEXT: leaq (%rdi), %rdi
# CHECK-NEXT: callq __sanitizer_sanitize_store1@PLT
# CHECK-NEXT: popq %rdi
# CHECK-NEXT: addq $128, %rsp
# CHECK-NEXT: leaq 128(%rsp), %rsp
#
# CHECK-NEXT: movb %al, (%rdi)
mov1b: # @mov1b
@ -41,21 +41,21 @@ mov1b: # @mov1b
.type mov16b,@function
# CHECK-LABEL: mov16b:
#
# CHECK: subq $128, %rsp
# CHECK: leaq -128(%rsp), %rsp
# CHECK-NEXT: pushq %rdi
# CHECK-NEXT: leaq (%rsi), %rdi
# CHECK-NEXT: callq __sanitizer_sanitize_load16@PLT
# CHECK-NEXT: popq %rdi
# CHECK-NEXT: addq $128, %rsp
# CHECK-NEXT: leaq 128(%rsp), %rsp
#
# CHECK-NEXT: movaps (%rsi), %xmm0
#
# CHECK-NEXT: subq $128, %rsp
# CHECK-NEXT: leaq -128(%rsp), %rsp
# CHECK-NEXT: pushq %rdi
# CHECK-NEXT: leaq (%rdi), %rdi
# CHECK-NEXT: callq __sanitizer_sanitize_store16@PLT
# CHECK-NEXT: popq %rdi
# CHECK-NEXT: addq $128, %rsp
# CHECK-NEXT: leaq 128(%rsp), %rsp
#
# CHECK-NEXT: movaps %xmm0, (%rdi)
mov16b: # @mov16b

16
test/Instrumentation/AddressSanitizer/X86/asm_swap_intel.s
View File

@ -6,39 +6,39 @@
.type swap,@function
# CHECK-LABEL: swap:
#
# CHECK: subq $128, %rsp
# CHECK: leaq -128(%rsp), %rsp
# CHECK-NEXT: pushq %rdi
# CHECK-NEXT: leaq (%rcx), %rdi
# CHECK-NEXT: callq __sanitizer_sanitize_load8@PLT
# CHECK-NEXT: popq %rdi
# CHECK-NEXT: addq $128, %rsp
# CHECK-NEXT: leaq 128(%rsp), %rsp
#
# CHECK-NEXT: movq (%rcx), %rax
#
# CHECK-NEXT: subq $128, %rsp
# CHECK-NEXT: leaq -128(%rsp), %rsp
# CHECK-NEXT: pushq %rdi
# CHECK-NEXT: leaq (%rdx), %rdi
# CHECK-NEXT: callq __sanitizer_sanitize_load8@PLT
# CHECK-NEXT: popq %rdi
# CHECK-NEXT: addq $128, %rsp
# CHECK-NEXT: leaq 128(%rsp), %rsp
#
# CHECK-NEXT: movq (%rdx), %rbx
#
# CHECK: subq $128, %rsp
# CHECK: leaq -128(%rsp), %rsp
# CHECK-NEXT: pushq %rdi
# CHECK-NEXT: leaq (%rcx), %rdi
# CHECK-NEXT: callq __sanitizer_sanitize_store8@PLT
# CHECK-NEXT: popq %rdi
# CHECK-NEXT: addq $128, %rsp
# CHECK-NEXT: leaq 128(%rsp), %rsp
#
# CHECK-NEXT: movq %rbx, (%rcx)
#
# CHECK-NEXT: subq $128, %rsp
# CHECK-NEXT: leaq -128(%rsp), %rsp
# CHECK-NEXT: pushq %rdi
# CHECK-NEXT: leaq (%rdx), %rdi
# CHECK-NEXT: callq __sanitizer_sanitize_store8@PLT
# CHECK-NEXT: popq %rdi
# CHECK-NEXT: addq $128, %rsp
# CHECK-NEXT: leaq 128(%rsp), %rsp
#
# CHECK-NEXT: movq %rax, (%rdx)
swap: # @swap