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Update.
[pintos-anon]
/
grading
/
userprog
/
sc-boundary.c
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#include <inttypes.h>
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#include <stdio.h>
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#include <string.h>
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#include <syscall-nr.h>
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static void *
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mk_boundary_array (void)
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{
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static char dst[8192];
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return dst + (4096 - (uintptr_t) dst % 4096);
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}
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int
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main (void)
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{
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int *p;
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printf ("(sc-boundary) begin\n");
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p = mk_boundary_array ();
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p--;
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p[0] = SYS_exit;
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p[1] = 42;
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asm volatile ("mov %0, %%esp; int $0x30"
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:
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: "g" (p));
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printf ("(sc-boundary) failed\n");
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return 1;
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}