Check for valid stack frame in longjmp.
[glibc.git] / sysdeps / i386 / ____longjmp_chk.S
blob6cd74968a2816af11f9e43d8a48290d047c8973d
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19         .section .rodata.str1.1,"aMS",@progbits,1
20         .type   longjmp_msg,@object
21 longjmp_msg:
22         .string "longjmp causes uninitialized stack frame"
23         .size   longjmp_msg, .-longjmp_msg
26 #define __longjmp ____longjmp_chk
28 #ifdef PIC
29 # define CALL_FAIL      movl    %ebx, %ecx;                                   \
30                         cfi_register(%ebx,%ecx);                              \
31                         LOAD_PIC_REG (bx);                                    \
32                         leal    longjmp_msg@GOTOFF(%ebx), %eax;               \
33                         call    __GI___fortify_fail@PLT
34 #else
35 # define CALL_FAIL      movl    $longjmp_msg, %eax;                           \
36                         call    __fortify_fail
37 #endif
39 #define CHECK_ESP(reg) \
40         cmpl    reg, %esp;                                                    \
41         jbe     .Lok;                                                         \
42         CALL_FAIL;                                                            \
43 .Lok:
45 #include "__longjmp.S"