23 lines
494 B
C
23 lines
494 B
C
// test user-level fault handler -- alloc pages to fix faults
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#include <inc/lib.h>
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#include <inc/x86.h>
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void
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umain(int argc, char **argv)
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{
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int x, r;
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int nsecs = 1;
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int secno = 0;
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int diskno = 1;
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if (read_eflags() & FL_IOPL_3)
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cprintf("eflags wrong\n");
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// this outb to select disk 1 should result in a general protection
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// fault, because user-level code shouldn't be able to use the io space.
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outb(0x1F6, 0xE0 | (1<<4));
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cprintf("%s: made it here --- bug\n");
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}
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