51 lines
1.2 KiB
C
51 lines
1.2 KiB
C
/*
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* Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
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* Licensed under the GPL
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/mman.h>
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#include "tt.h"
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#include "mem_user.h"
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#include "user_util.h"
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#include "os.h"
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void remap_data(void *segment_start, void *segment_end, int w)
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{
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void *addr;
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unsigned long size;
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int data, prot;
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if(w) prot = PROT_WRITE;
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else prot = 0;
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prot |= PROT_READ | PROT_EXEC;
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size = (unsigned long) segment_end -
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(unsigned long) segment_start;
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data = create_mem_file(size);
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addr = mmap(NULL, size, PROT_WRITE | PROT_READ, MAP_SHARED, data, 0);
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if(addr == MAP_FAILED){
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perror("mapping new data segment");
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exit(1);
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}
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memcpy(addr, segment_start, size);
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if(switcheroo(data, prot, addr, segment_start, size) < 0){
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printf("switcheroo failed\n");
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exit(1);
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}
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}
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/*
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* Overrides for Emacs so that we follow Linus's tabbing style.
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* Emacs will notice this stuff at the end of the file and automatically
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* adjust the settings for this buffer only. This must remain at the end
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* of the file.
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* ---------------------------------------------------------------------------
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* Local variables:
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* c-file-style: "linux"
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* End:
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*/
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