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tools: add blkdumpb

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This commit is contained in:
Virgil Dupras 2019-12-10 10:33:29 -05:00
parent 9ec71ecfee
commit b40b39f45c
3 changed files with 44 additions and 1 deletions
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1
tools/.gitignore vendored
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@ -1,3 +1,4 @@
*.o
/memdumpb
/blkdumpb
/uploadb

7
tools/Makefile
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@ -1,8 +1,10 @@
MEMDUMP_TGT = memdumpb
MEMDUMP_SRC = memdump.c
BLKDUMP_TGT = blkdumpb
BLKDUMP_SRC = blkdump.c
UPLOAD_TGT = uploadb
UPLOAD_SRC = upload.c
TARGETS = $(MEMDUMP_TGT) $(UPLOAD_TGT)
TARGETS = $(MEMDUMP_TGT) $(BLKDUMP_TGT) $(UPLOAD_TGT)
OBJS = common.o
all: $(TARGETS)
@ -14,6 +16,9 @@ all: $(TARGETS)
$(MEMDUMP_TGT): $(MEMDUMP_SRC) $(OBJS)
$(CC) $(CFLAGS) $(MEMDUMP_SRC) $(OBJS) -o $@
$(BLKDUMP_TGT): $(BLKDUMP_SRC) $(OBJS)
$(CC) $(CFLAGS) $(BLKDUMP_SRC) $(OBJS) -o $@
$(UPLOAD_TGT): $(UPLOAD_SRC) $(OBJS)
$(CC) $(CFLAGS) $(UPLOAD_SRC) $(OBJS) -o $@

37
tools/blkdump.c Normal file
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@ -0,0 +1,37 @@
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include "common.h"
/* Read specified number of bytes in active blkdev at active offset.
*/
int main(int argc, char **argv)
{
if (argc != 3) {
fprintf(stderr, "Usage: ./memdump device bytecount\n");
return 1;
}
unsigned int bytecount = strtol(argv[2], NULL, 16);
if (!bytecount) {
// nothing to spit
return 0;
}
int fd = open(argv[1], O_RDWR|O_NOCTTY);
char s[3];
for (int i=0; i<bytecount; i++) {
sendcmd(fd, "getb");
read(fd, s, 2); // read prompt
sendcmd(fd, "puth a");
read(fd, s, 2); // read hex pair
s[2] = 0; // null terminate
unsigned char c = strtol(s, NULL, 16);
putchar(c);
read(fd, s, 2); // read prompt
}
return 0;
}