mirror of https://github.com/mpv-player/mpv
56 lines
1.5 KiB
C
56 lines
1.5 KiB
C
/*
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bios2dump.c - Was designed to extract BIOS of your PC and save it to file.
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Usage: as argument requires DOS interrupt number in hexadecimal form.
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as output - will write 64KB file which will named: SSSS_OOOO.intXX
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where: SSSS - segment of BIOS interrupt handler
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OOOO - offset of BIOS interrupt handler
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XX - interrupt number which was passed as argument
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Licence: GNU GPL v2
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Copyright: Nick Kurshev <nickols_k@mail.ru>
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*/
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#include <stdio.h>
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#include <stdlib.h>
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int main( int argc, char *argv[])
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{
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FILE * fd_mem, *fd_out;
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unsigned short int_seg,int_off;
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unsigned long bios_off;
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int int_no;
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size_t i;
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char outname[80];
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unsigned char ch;
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if(argc < 2)
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{
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printf("Usage: %s int_no(in hex)\n",argv[0]);
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return EXIT_FAILURE;
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}
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int_no = strtol(argv[1],NULL,16);
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if(!(fd_mem = fopen("/dev/mem","rb")))
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{
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perror("Can't open file - /dev/mem");
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return EXIT_FAILURE;
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}
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fseek(fd_mem,int_no*4,SEEK_SET);
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fread(&int_off,sizeof(unsigned short),1,fd_mem);
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fread(&int_seg,sizeof(unsigned short),1,fd_mem);
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sprintf(outname,"%04X_%04X.int%02X",int_seg,int_off,int_no);
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if(!(fd_out = fopen(outname,"wb")))
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{
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perror("Can't open output file");
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fclose(fd_mem);
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return EXIT_FAILURE;
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}
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bios_off = (int_seg << 4) + int_off;
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bios_off &= 0xf0000;
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fseek(fd_mem,bios_off,SEEK_SET);
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for(i=0;i<0x10000;i++)
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{
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fread(&ch,1,1,fd_mem);
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fwrite(&ch,1,1,fd_out);
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}
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fclose(fd_out);
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fclose(fd_mem);
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return EXIT_SUCCESS;
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}
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