159 lines
4.8 KiB
LLVM
159 lines
4.8 KiB
LLVM
; RUN: llc -mtriple=i386-pc-windows-msvc < %s -o - | FileCheck -check-prefix=MSVC-X86 %s
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; RUN: llc -mtriple=x86_64-pc-windows-msvc < %s -o - | FileCheck -check-prefix=MSVC-X64 %s
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; Make sure fastisel falls back and does something secure.
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; RUN: llc -mtriple=i686-pc-windows-msvc -O0 < %s -o - | FileCheck -check-prefix=MSVC-X86-O0 %s
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; RUN: llc -mtriple=x86_64-pc-windows-msvc -O0 < %s -o - | FileCheck -check-prefix=MSVC-X64-O0 %s
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@"\01LC" = internal constant [11 x i8] c"buf == %s\0A\00" ; <ptr> [#uses=1]
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define void @test(ptr %a) nounwind ssp {
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entry:
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%a_addr = alloca ptr ; <ptr> [#uses=2]
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%buf = alloca [8 x i8] ; <ptr> [#uses=2]
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store ptr %a, ptr %a_addr
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%0 = load ptr, ptr %a_addr, align 4 ; <ptr> [#uses=1]
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%1 = call ptr @strcpy(ptr %buf, ptr %0) nounwind ; <ptr> [#uses=0]
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%2 = call i32 (ptr, ...) @printf(ptr @"\01LC", ptr %buf) nounwind ; <i32> [#uses=0]
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br label %return
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return: ; preds = %entry
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ret void
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}
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; MSVC-X86-LABEL: _test:
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; MSVC-X86: movl ___security_cookie, %[[REG1:[^ ]*]]
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; MSVC-X86: xorl %esp, %[[REG1]]
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; MSVC-X86: movl %[[REG1]], [[SLOT:[0-9]*]](%esp)
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; MSVC-X86: calll _strcpy
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; MSVC-X86: movl [[SLOT]](%esp), %ecx
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; MSVC-X86: xorl %esp, %ecx
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; MSVC-X86: calll @__security_check_cookie@4
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; MSVC-X86: retl
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; MSVC-X64-LABEL: test:
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; MSVC-X64: movq __security_cookie(%rip), %[[REG1:[^ ]*]]
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; MSVC-X64: xorq %rsp, %[[REG1]]
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; MSVC-X64: movq %[[REG1]], [[SLOT:[0-9]*]](%rsp)
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; MSVC-X64: callq strcpy
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; MSVC-X64: movq [[SLOT]](%rsp), %rcx
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; MSVC-X64: xorq %rsp, %rcx
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; MSVC-X64: callq __security_check_cookie
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; MSVC-X64: retq
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; MSVC-X86-O0-LABEL: _test:
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; MSVC-X86-O0: movl ___security_cookie, %[[REG1:[^ ]*]]
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; MSVC-X86-O0: xorl %esp, %[[REG1]]
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; MSVC-X86-O0: movl %[[REG1]], [[SLOT:[0-9]*]](%esp)
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; MSVC-X86-O0: calll _strcpy
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; MSVC-X86-O0: movl [[SLOT]](%esp), %ecx
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; MSVC-X86-O0: xorl %esp, %ecx
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; MSVC-X86-O0: calll @__security_check_cookie@4
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; MSVC-X86-O0: retl
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; MSVC-X64-O0-LABEL: test:
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; MSVC-X64-O0: movq __security_cookie(%rip), %[[REG1:[^ ]*]]
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; MSVC-X64-O0: xorq %rsp, %[[REG1]]
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; MSVC-X64-O0: movq %[[REG1]], [[SLOT:[0-9]*]](%rsp)
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; MSVC-X64-O0: callq strcpy
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; MSVC-X64-O0: movq [[SLOT]](%rsp), %rcx
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; MSVC-X64-O0: xorq %rsp, %rcx
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; MSVC-X64-O0: callq __security_check_cookie
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; MSVC-X64-O0: retq
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declare void @escape(ptr)
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define void @test_vla(i32 %n) nounwind ssp {
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%vla = alloca i32, i32 %n
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call void @escape(ptr %vla)
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ret void
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}
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; MSVC-X86-LABEL: _test_vla:
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; MSVC-X86: pushl %ebp
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; MSVC-X86: movl %esp, %ebp
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; MSVC-X86: movl ___security_cookie, %[[REG1:[^ ]*]]
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; MSVC-X86: xorl %ebp, %[[REG1]]
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; MSVC-X86: movl %[[REG1]], [[SLOT:-[0-9]*]](%ebp)
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; MSVC-X86: calll __chkstk
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; MSVC-X86: pushl
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; MSVC-X86: calll _escape
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; MSVC-X86: movl [[SLOT]](%ebp), %ecx
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; MSVC-X86: xorl %ebp, %ecx
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; MSVC-X86: calll @__security_check_cookie@4
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; MSVC-X86: movl %ebp, %esp
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; MSVC-X86: popl %ebp
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; MSVC-X86: retl
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; MSVC-X64-LABEL: test_vla:
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; MSVC-X64: pushq %rbp
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; MSVC-X64: subq $16, %rsp
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; MSVC-X64: leaq 16(%rsp), %rbp
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; MSVC-X64: movq __security_cookie(%rip), %[[REG1:[^ ]*]]
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; MSVC-X64: xorq %rbp, %[[REG1]]
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; MSVC-X64: movq %[[REG1]], [[SLOT:-[0-9]*]](%rbp)
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; MSVC-X64: callq __chkstk
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; MSVC-X64: callq escape
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; MSVC-X64: movq [[SLOT]](%rbp), %rcx
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; MSVC-X64: xorq %rbp, %rcx
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; MSVC-X64: callq __security_check_cookie
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; MSVC-X64: retq
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; This case is interesting because we address local variables with RBX but XOR
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; the guard value with RBP. That's fine, either value will do, as long as they
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; are the same across the life of the frame.
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define void @test_vla_realign(i32 %n) nounwind ssp {
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%realign = alloca i32, align 32
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%vla = alloca i32, i32 %n
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call void @escape(ptr %realign)
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call void @escape(ptr %vla)
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ret void
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}
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; MSVC-X86-LABEL: _test_vla_realign:
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; MSVC-X86: pushl %ebp
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; MSVC-X86: movl %esp, %ebp
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; MSVC-X86: pushl %esi
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; MSVC-X86: andl $-32, %esp
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; MSVC-X86: subl $32, %esp
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; MSVC-X86: movl %esp, %esi
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; MSVC-X86: movl ___security_cookie, %[[REG1:[^ ]*]]
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; MSVC-X86: xorl %ebp, %[[REG1]]
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; MSVC-X86: movl %[[REG1]], [[SLOT:[0-9]*]](%esi)
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; MSVC-X86: calll __chkstk
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; MSVC-X86: pushl
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; MSVC-X86: calll _escape
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; MSVC-X86: movl [[SLOT]](%esi), %ecx
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; MSVC-X86: xorl %ebp, %ecx
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; MSVC-X86: calll @__security_check_cookie@4
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; MSVC-X86: leal -8(%ebp), %esp
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; MSVC-X86: popl %esi
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; MSVC-X86: popl %ebp
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; MSVC-X86: retl
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; MSVC-X64-LABEL: test_vla_realign:
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; MSVC-X64: pushq %rbp
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; MSVC-X64: pushq %rbx
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; MSVC-X64: subq $32, %rsp
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; MSVC-X64: leaq 32(%rsp), %rbp
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; MSVC-X64: andq $-32, %rsp
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; MSVC-X64: movq %rsp, %rbx
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; MSVC-X64: movq __security_cookie(%rip), %[[REG1:[^ ]*]]
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; MSVC-X64: xorq %rbp, %[[REG1]]
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; MSVC-X64: movq %[[REG1]], [[SLOT:[0-9]*]](%rbx)
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; MSVC-X64: callq __chkstk
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; MSVC-X64: callq escape
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; MSVC-X64: movq [[SLOT]](%rbx), %rcx
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; MSVC-X64: xorq %rbp, %rcx
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; MSVC-X64: callq __security_check_cookie
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; MSVC-X64: retq
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declare ptr @strcpy(ptr, ptr) nounwind
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declare i32 @printf(ptr, ...) nounwind
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