43 lines
836 B
C
43 lines
836 B
C
#include <lib/print.h>
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#include <lib/type.h>
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#include <lib/syscall.h>
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#define PMO_SIZE 0x1000
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#define MAP_VA 0x1000000
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/* virtual memory rights */
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#define VM_READ (1 << 0)
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#define VM_WRITE (1 << 1)
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#define VM_EXEC (1 << 2)
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/* PMO types */
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#define PMO_ANONYM 0
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#define PMO_DATA 1
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/* a thread's own cap_group */
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#define SELF_CAP 0
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int main(int argc, char *argv[], char *envp[])
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{
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int pmo_cap, r;
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unsigned long *ptr;
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pmo_cap = usys_create_pmo(0x1000, PMO_ANONYM);
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if (pmo_cap < 0) {
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printf("usys_create_pmo ret:%d\n", pmo_cap);
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usys_exit(pmo_cap);
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}
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r = usys_map_pmo(SELF_CAP, pmo_cap, MAP_VA, VM_READ | VM_WRITE);
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if (r < 0) {
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printf("usys_map_pmo ret:%d\n", r);
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usys_exit(r);
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}
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ptr = (unsigned long *)MAP_VA;
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*ptr = 0xdeadbeef;
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printf("value is %lx\n", *ptr);
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usys_exit(0);
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return 0;
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}
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