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https://github.com/hsoft/collapseos.git
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46 lines
1.2 KiB
C
46 lines
1.2 KiB
C
#include <stdlib.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include "common.h"
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/* Read specified number of bytes at specified memory address through a BASIC
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* remote shell and dump it to stdout.
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*/
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int main(int argc, char **argv)
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{
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if (argc != 4) {
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fprintf(stderr, "Usage: ./memdump device memptr bytecount\n");
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return 1;
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}
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unsigned int memptr = strtol(argv[2], NULL, 16);
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unsigned int bytecount = strtol(argv[3], NULL, 16);
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fprintf(stderr, "memptr: 0x%04x bytecount: 0x%04x.\n", memptr, bytecount);
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if (memptr+bytecount > 0xffff) {
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fprintf(stderr, "memptr+bytecount out of range.\n");
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return 1;
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}
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if (!bytecount) {
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// nothing to spit
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return 0;
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}
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int fd = open(argv[1], O_RDWR|O_NOCTTY);
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char s[0x30];
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sprintf(s, "m=0x%04x", memptr);
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sendcmdp(fd, s);
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sprintf(s, "while m<0x%04x peek m:puth a:m=m+1", memptr+bytecount);
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sendcmd(fd, s);
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for (int i=0; i<bytecount; i++) {
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read(fd, s, 2); // read hex pair
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s[2] = 0; // null terminate
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unsigned char c = strtol(s, NULL, 16);
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putchar(c);
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}
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read(fd, s, 2); // read prompt
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return 0;
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}
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