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/*
* zgetdump - Tool for copying and converting System z dumps
*
* Generic output dump format functions (DFO - Dump Format Output)
*
* Copyright IBM Corp. 2001, 2017
*
* s390-tools is free software; you can redistribute it and/or modify
* it under the terms of the MIT license. See LICENSE for details.
*/
#include <string.h>
#include <errno.h>
#include "zg.h"
#include "dfo_mem_chunk.h"
#include "dfo.h"
/*
* DFO vector
*/
static struct dfo *dfo_vec[] = {
&dfo_s390,
&dfo_elf,
NULL,
};
/*
* File local static data
*/
static struct {
u64 off; /* Current file offset in dump */
struct dfo *dfo;
} l;
/*
* Get DFO name
*/
const char *dfo_name(void)
{
return l.dfo->name;
}
/*
* Set DFO by name
*/
int dfo_set(const char *dfo_name)
{
struct dfo *dfo;
int i = 0;
while ((dfo = dfo_vec[i])) {
if (strcmp(dfo->name, dfo_name) == 0) {
l.dfo = dfo;
return 0;
}
i++;
}
return -ENODEV;
}
/*
* Initialize output dump format
*/
void dfo_init(void)
{
if (!l.dfo)
ABORT("DFO not set");
if (dfo_chunk_init())
ABORT("DFO memory chunk init failed");
l.dfo->init();
}
/*
* Seek to output dump offset "off"
*/
void dfo_seek(u64 off)
{
l.off = off;
}
/*
* Read "cnt" bytes of output dump at current offest
*/
u64 dfo_read(void *buf, u64 cnt)
{
struct dfo_chunk *dfo_chunk;
u64 copied = 0, end, size;
u64 off = l.off;
while (copied != cnt) {
dfo_chunk = dfo_chunk_find(off, &end);
if (!dfo_chunk)
goto out;
size = MIN(cnt - copied, end - off + 1);
dfo_chunk->read_fn(dfo_chunk, off - dfo_chunk->start,
buf + copied, size);
copied += size;
off += size;
}
out:
l.off = off;
return copied;
}
/*
* Return output dump size
*/
u64 dfo_size(void)
{
return dfo_chunk_dump_size();
}
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