diff options
Diffstat (limited to 'test/mmap/mmap-arm.c')
-rw-r--r-- | test/mmap/mmap-arm.c | 46 |
1 files changed, 0 insertions, 46 deletions
diff --git a/test/mmap/mmap-arm.c b/test/mmap/mmap-arm.c deleted file mode 100644 index 8b94c6199..000000000 --- a/test/mmap/mmap-arm.c +++ /dev/null @@ -1,46 +0,0 @@ -/* When trying to map /dev/mem with offset 0xFFFFF000 on the ARM platform, mmap - * returns -EOVERFLOW. - * - * Since off_t is defined as a long int and the sign bit is set in the address, - * the shift operation shifts in ones instead of zeroes - * from the left. This results the offset sent to the kernel function becomes - * 0xFFFFFFFF instead of 0x000FFFFF with MMAP2_PAGE_SHIFT set to 12. - */ - -#include <unistd.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <errno.h> -#include <fcntl.h> -#include <sys/mman.h> - -#define FATAL do { fprintf(stderr, "Error at line %d, file %s (%d) [%s]\n", \ - __LINE__, __FILE__, errno, strerror(errno)); exit(1); } while(0) - -#define MAP_SIZE 4096UL -#define MAP_MASK (MAP_SIZE - 1) - -int main(int argc, char **argv) { - void* map_base = 0; - int fd; - off_t target = 0xfffff000; - if((fd = open("/dev/mem", O_RDWR | O_SYNC)) == -1) { - /* skip test for non-root users */ - if (errno == EACCES) - return 0; - FATAL; - } - printf("/dev/mem opened.\n"); - fflush(stdout); - - /* Map one page */ - map_base = mmap(0, MAP_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED, - fd, target & ~MAP_MASK); - if(map_base == (void *) -1) FATAL; - printf("Memory mapped at address %p.\n", map_base); - fflush(stdout); - if(munmap(map_base, MAP_SIZE) == -1) FATAL; - close(fd); - return 0; -} |