68 lines
1.3 KiB
C
68 lines
1.3 KiB
C
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#include <stdio.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <sys/mman.h>
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int
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main(int argc, char *argv[])
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{
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#define CHUNKSIZE 8192
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#define CHUNKS1 3
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#define CHUNKS2 2
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#define CHUNKS (CHUNKS1+CHUNKS2)
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int i, fd;
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char *v[CHUNKS];
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#define STARTV 0x90000000
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char *vaddr = (char *) STARTV;
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ssize_t l;
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printf("Test 44 ");
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fflush(stdout);
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for(i = 0; i < CHUNKS; i++) {
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v[i] = mmap(vaddr, CHUNKSIZE, PROT_READ|PROT_WRITE, 0, -1, 0);
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if(v[i] == MAP_FAILED) {
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perror("mmap");
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fprintf(stderr, "mmap failed\n");
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exit(1);
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}
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if(v[i] != vaddr) {
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fprintf(stderr, "mmap said 0x%p but i wanted 0x%p\n",
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v[i], vaddr);
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exit(1);
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}
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vaddr += CHUNKSIZE;
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}
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#define DEV_ZERO "/dev/zero"
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if((fd=open(DEV_ZERO, O_RDONLY)) < 0) {
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perror("open");
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fprintf(stderr, "open failed for %s\n", DEV_ZERO);
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exit(1);
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}
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#define TOTAL1 (CHUNKS1*CHUNKSIZE)
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/* Make single read cross region boundary. */
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if((l=read(fd, v[0], TOTAL1)) != TOTAL1) {
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fprintf(stderr, "read %d but expected %d\n", l, TOTAL1);
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exit(1);
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}
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/* Force single copy to cross region boundary. */
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{
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char *t;
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t = v[CHUNKS1]+CHUNKSIZE-2;
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if((l=read(fd, t, CHUNKSIZE)) != CHUNKSIZE) {
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fprintf(stderr, "read %d but expected %d\n", l, CHUNKSIZE);
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exit(1);
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}
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}
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printf("ok\n");
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exit(0);
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}
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