mirror of
https://github.com/xcat2/xNBA.git
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49 lines
2.0 KiB
C
49 lines
2.0 KiB
C
#include <stdint.h>
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#include <vsprintf.h>
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__attribute__ (( noreturn, section ( ".text.null_trap" ) ))
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void null_function_trap ( void ) {
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/* 128 bytes of NOPs; the idea of this is that if something
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* dereferences a NULL pointer and overwrites us, we at least
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* have some chance of still getting to execute the printf()
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* statement.
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*/
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__asm__ __volatile__ ( "nop ; nop ; nop ; nop" );
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__asm__ __volatile__ ( "nop ; nop ; nop ; nop" );
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__asm__ __volatile__ ( "nop ; nop ; nop ; nop" );
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__asm__ __volatile__ ( "nop ; nop ; nop ; nop" );
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__asm__ __volatile__ ( "nop ; nop ; nop ; nop" );
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__asm__ __volatile__ ( "nop ; nop ; nop ; nop" );
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__asm__ __volatile__ ( "nop ; nop ; nop ; nop" );
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__asm__ __volatile__ ( "nop ; nop ; nop ; nop" );
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__asm__ __volatile__ ( "nop ; nop ; nop ; nop" );
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__asm__ __volatile__ ( "nop ; nop ; nop ; nop" );
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__asm__ __volatile__ ( "nop ; nop ; nop ; nop" );
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__asm__ __volatile__ ( "nop ; nop ; nop ; nop" );
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__asm__ __volatile__ ( "nop ; nop ; nop ; nop" );
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__asm__ __volatile__ ( "nop ; nop ; nop ; nop" );
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__asm__ __volatile__ ( "nop ; nop ; nop ; nop" );
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__asm__ __volatile__ ( "nop ; nop ; nop ; nop" );
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__asm__ __volatile__ ( "nop ; nop ; nop ; nop" );
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__asm__ __volatile__ ( "nop ; nop ; nop ; nop" );
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__asm__ __volatile__ ( "nop ; nop ; nop ; nop" );
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__asm__ __volatile__ ( "nop ; nop ; nop ; nop" );
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__asm__ __volatile__ ( "nop ; nop ; nop ; nop" );
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__asm__ __volatile__ ( "nop ; nop ; nop ; nop" );
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__asm__ __volatile__ ( "nop ; nop ; nop ; nop" );
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__asm__ __volatile__ ( "nop ; nop ; nop ; nop" );
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__asm__ __volatile__ ( "nop ; nop ; nop ; nop" );
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__asm__ __volatile__ ( "nop ; nop ; nop ; nop" );
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__asm__ __volatile__ ( "nop ; nop ; nop ; nop" );
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__asm__ __volatile__ ( "nop ; nop ; nop ; nop" );
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__asm__ __volatile__ ( "nop ; nop ; nop ; nop" );
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__asm__ __volatile__ ( "nop ; nop ; nop ; nop" );
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__asm__ __volatile__ ( "nop ; nop ; nop ; nop" );
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__asm__ __volatile__ ( "nop ; nop ; nop ; nop" );
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printf ( "NULL method called from %p\n",
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__builtin_return_address ( 0 ) );
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while ( 1 ) {}
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}
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