47 lines
1.2 KiB
C
47 lines
1.2 KiB
C
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdio.h>
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#include <stdint.h>
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#include <unistd.h>
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#include <limits.h>
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#include <sys/mman.h>
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int
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main(void)
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{
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const intmax_t pagesize = sysconf(_SC_PAGESIZE);
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const unsigned long length = pagesize * 3;
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const int fd = -1;
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off_t offset;
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void *addr, *p;
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#if ULONG_MAX > 4294967295UL
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offset = 0xcafedeadbeef000 & -pagesize;
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addr = (void *) (uintmax_t) (0xfacefeed000 & -pagesize);
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#else
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offset = 0xdeadbeef000 & -pagesize;
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addr = (void *) (unsigned int) (0xfaced000 & -pagesize);
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#endif
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p = mmap(addr, length, PROT_READ | PROT_WRITE,
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MAP_PRIVATE | MAP_ANONYMOUS, fd, offset);
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if (p == MAP_FAILED ||
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mprotect(p, length, PROT_NONE) ||
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munmap(p, length))
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return 77;
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if (sizeof(offset) == sizeof(int))
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printf("(mmap2?|old_mmap)\\(%p, %lu, PROT_READ\\|PROT_WRITE, "
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"MAP_PRIVATE\\|MAP_ANONYMOUS, %d, %#x\\) = %p\n",
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addr, length, fd, (unsigned int) offset, p);
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else
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printf("(mmap2?|old_mmap)\\(%p, %lu, PROT_READ\\|PROT_WRITE, "
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"MAP_PRIVATE\\|MAP_ANONYMOUS, %d, %#jx\\) = %p\n",
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addr, length, fd, (uintmax_t) offset, p);
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printf("mprotect\\(%p, %lu, PROT_NONE\\) += 0\n", p, length);
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printf("munmap\\(%p, %lu\\) += 0\n", p, length);
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return 0;
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}
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