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105 lines
2.7 KiB
105 lines
2.7 KiB
# REQUIRES: x86
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# RUN: llvm-mc -triple x86_64-windows-msvc %s -filetype=obj -o %t.obj
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# RUN: lld-link %t.obj -guard:cf -out:%t.exe -entry:main
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# RUN: llvm-readobj --file-headers --coff-load-config %t.exe | FileCheck %s
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# CHECK: ImageBase: 0x140000000
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# CHECK: LoadConfig [
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# CHECK: SEHandlerTable: 0x0
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# CHECK: SEHandlerCount: 0
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# CHECK: GuardCFCheckFunction: 0x0
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# CHECK: GuardCFCheckDispatch: 0x0
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# CHECK: GuardCFFunctionTable: 0x14000{{.*}}
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# CHECK: GuardCFFunctionCount: 1
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# CHECK: GuardFlags: 0x10500
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# CHECK: GuardAddressTakenIatEntryTable: 0x0
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# CHECK: GuardAddressTakenIatEntryCount: 0
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# CHECK: GuardLongJumpTargetTable: 0x14000{{.*}}
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# CHECK: GuardLongJumpTargetCount: 1
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# CHECK: ]
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# CHECK: GuardLJmpTable [
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# CHECK-NEXT: 0x14000{{.*}}
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# CHECK-NEXT: ]
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# This assembly is reduced from C code like:
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# #include <setjmp.h>
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# jmp_buf buf;
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# void g() { longjmp(buf, 1); }
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# void f() {
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# if (setjmp(buf))
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# return;
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# g();
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# }
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# int main() { f(); }
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# We need @feat.00 to have 0x800 to indicate /guard:cf.
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.def @feat.00;
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.scl 3;
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.type 0;
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.endef
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.globl @feat.00
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@feat.00 = 0x801
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.def f; .scl 2; .type 32; .endef
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.globl f
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f:
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pushq %rbp
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subq $32, %rsp
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leaq 32(%rsp), %rbp
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leaq buf(%rip), %rcx
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leaq -32(%rbp), %rdx
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callq _setjmp
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.Lljmp1:
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testl %eax, %eax
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je .LBB1_1
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addq $32, %rsp
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popq %rbp
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retq
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.LBB1_1: # %if.end
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leaq buf(%rip), %rcx
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movl $1, %edx
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callq longjmp
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ud2
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# Record the longjmp target.
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.section .gljmp$y,"dr"
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.symidx .Lljmp1
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.text
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# Provide setjmp/longjmp stubs.
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.def _setjmp; .scl 2; .type 32; .endef
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.globl _setjmp
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_setjmp:
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retq
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.def longjmp; .scl 2; .type 32; .endef
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.globl longjmp
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longjmp:
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retq
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.def main; .scl 2; .type 32; .endef
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.globl main # -- Begin function main
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main: # @main
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subq $40, %rsp
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callq f
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xorl %eax, %eax
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addq $40, %rsp
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retq
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.comm buf,256,4 # @buf
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.section .rdata,"dr"
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.globl _load_config_used
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_load_config_used:
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.long 256
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.fill 124, 1, 0
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.quad __guard_fids_table
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.quad __guard_fids_count
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.long __guard_flags
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.fill 12, 1, 0
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.quad __guard_iat_table
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.quad __guard_iat_count
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.quad __guard_longjmp_table
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.quad __guard_fids_count
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.fill 84, 1, 0
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