mirror of
https://github.com/ioacademy-jikim/debugging
synced 2025-06-08 00:16:11 +00:00
23 lines
541 B
C
23 lines
541 B
C
#include <stdlib.h>
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#include <unistd.h>
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#include <sys/syscall.h>
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int main(void)
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{
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// uninitialised, but we know pi[0] is 0x0
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int* pi = malloc(sizeof(int));
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// uninitialised, but we know pc[0] points to 0x0
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char** pc = malloc(sizeof(char*));
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// Five errors:
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// - the syscall number itself is undefined (but we know it's
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// 0 + __NR_write :)
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// - each of the scalar args are undefined
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// - the 2nd arg points to unaddressable memory.
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syscall(pi[0]+__NR_write, pi[0], pc[0], pi[0]+1);
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return 0;
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}
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