43 lines
807 B
C
43 lines
807 B
C
#include <inc/lib.h>
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#define VA ((char *) 0xA0000000)
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const char *msg = "hello, world\n";
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const char *msg2 = "goodbye, world\n";
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void childofspawn(void);
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void
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umain(int argc, char **argv)
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{
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int r;
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if (argc != 0)
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childofspawn();
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if ((r = sys_page_alloc(0, VA, PTE_P|PTE_W|PTE_U|PTE_SHARE)) < 0)
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panic("sys_page_alloc: %e", r);
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// check fork
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if ((r = fork()) < 0)
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panic("fork: %e", r);
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if (r == 0) {
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strcpy(VA, msg);
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exit();
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}
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wait(r);
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cprintf("fork handles PTE_SHARE %s\n", strcmp(VA, msg) == 0 ? "right" : "wrong");
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// check spawn
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if ((r = spawnl("/testptelibrary", "testptelibrary", "arg", 0)) < 0)
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panic("spawn: %e", r);
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wait(r);
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cprintf("spawn handles PTE_SHARE %s\n", strcmp(VA, msg2) == 0 ? "right" : "wrong");
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}
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void
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childofspawn(void)
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{
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strcpy(VA, msg2);
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exit();
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}
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