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[sl] syslinux support (EXPERIMENTAL)

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* MS platforms only (*BREAKS* MinGW)
This commit is contained in:
Pete Batard 2012-01-12 02:52:40 +00:00
parent 130afd8294
commit acf7d072b0
43 changed files with 3063 additions and 57 deletions
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212
src/syslinux.c Normal file
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/* ----------------------------------------------------------------------- *
*
* Copyright 2003 Lars Munch Christensen - All Rights Reserved
* Copyright 1998-2008 H. Peter Anvin - All Rights Reserved
* Copyright 2011 Pete Batard
*
* Based on the Linux installer program for SYSLINUX by H. Peter Anvin
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, Inc., 53 Temple Place Ste 330,
* Boston MA 02111-1307, USA; either version 2 of the License, or
* (at your option) any later version; incorporated herein by reference.
*
* ----------------------------------------------------------------------- */
/* Memory leaks detection - define _CRTDBG_MAP_ALLOC as preprocessor macro */
#ifdef _CRTDBG_MAP_ALLOC
#include <stdlib.h>
#include <crtdbg.h>
#endif
#include <windows.h>
#include <stdio.h>
#include <malloc.h>
#include <ctype.h>
#include "rufus.h"
#include "resource.h"
#include "syslinux.h"
#include "libfat.h"
#include "setadv.h"
unsigned char* syslinux_ldlinux;
unsigned int syslinux_ldlinux_len;
unsigned char* syslinux_bootsect;
unsigned int syslinux_bootsect_len;
/*
* Wrapper for ReadFile suitable for libfat
*/
int libfat_readfile(intptr_t pp, void *buf, size_t secsize,
libfat_sector_t sector)
{
uint64_t offset = (uint64_t) sector * secsize;
LONG loword = (LONG) offset;
LONG hiword = (LONG) (offset >> 32);
LONG hiwordx = hiword;
DWORD bytes_read;
if (SetFilePointer((HANDLE) pp, loword, &hiwordx, FILE_BEGIN) != loword ||
hiword != hiwordx ||
!ReadFile((HANDLE) pp, buf, (DWORD)secsize, &bytes_read, NULL) ||
bytes_read != secsize) {
uprintf("Cannot read sector %u\n", sector);
// TODO -1?
return 0;
}
return (int)secsize;
}
// TODO: set format errors
BOOL InstallSysLinux(DWORD num, const char* drive_name)
{
HANDLE f_handle = INVALID_HANDLE_VALUE;
HANDLE d_handle = INVALID_HANDLE_VALUE;
DWORD bytes_read;
DWORD bytes_written;
BOOL r = FALSE;
HGLOBAL res_handle;
HRSRC res;
static unsigned char sectbuf[SECTOR_SIZE];
static char ldlinux_name[] = "?:\\ldlinux.sys";
struct libfat_filesystem *fs;
libfat_sector_t s, *secp;
libfat_sector_t *sectors;
int ldlinux_sectors;
uint32_t ldlinux_cluster;
int nsectors;
ldlinux_name[0] = drive_name[0];
/* Initialize the ADV -- this should be smarter */
syslinux_reset_adv(syslinux_adv);
/* Access ldlinux.sys resource */
res = FindResource(hMainInstance, MAKEINTRESOURCE(IDR_SL_LDLINUX_SYS), RT_RCDATA);
if (res == NULL) {
uprintf("Unable to locate ldlinux.sys resource: %s\n", WindowsErrorString());
goto out;
}
res_handle = LoadResource(NULL, res);
if (res_handle == NULL) {
uprintf("Unable to load ldlinux.sys resource: %s\n", WindowsErrorString());
goto out;
}
syslinux_ldlinux = (unsigned char*)LockResource(res_handle);
syslinux_ldlinux_len = SizeofResource(NULL, res);
/* Access ldlinux.bss resource */
res = FindResource(hMainInstance, MAKEINTRESOURCE(IDR_SL_LDLINUX_BSS), RT_RCDATA);
if (res == NULL) {
uprintf("Unable to locate ldlinux.bss resource: %s\n", WindowsErrorString());
goto out;
}
res_handle = LoadResource(NULL, res);
if (res_handle == NULL) {
uprintf("Unable to load ldlinux.bss resource: %s\n", WindowsErrorString());
goto out;
}
syslinux_bootsect = (unsigned char*)LockResource(res_handle);
syslinux_bootsect_len = SizeofResource(NULL, res);
/* Create ldlinux.sys file */
f_handle = CreateFileA(ldlinux_name, GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ | FILE_SHARE_WRITE,
NULL, CREATE_ALWAYS,
FILE_ATTRIBUTE_READONLY | FILE_ATTRIBUTE_SYSTEM |
FILE_ATTRIBUTE_HIDDEN, NULL);
if (f_handle == INVALID_HANDLE_VALUE) {
uprintf("Unable to create ldlinux.sys\n");
goto out;
}
/* Write ldlinux.sys file */
if (!WriteFile(f_handle, syslinux_ldlinux, syslinux_ldlinux_len,
&bytes_written, NULL) ||
bytes_written != syslinux_ldlinux_len) {
uprintf("Could not write ldlinux.sys\n");
goto out;
}
if (!WriteFile(f_handle, syslinux_adv, 2 * ADV_SIZE,
&bytes_written, NULL) ||
bytes_written != 2 * ADV_SIZE) {
uprintf("Could not write ADV to ldlinux.sys\n");
goto out;
}
/* Now flush the media */
if (!FlushFileBuffers(f_handle)) {
uprintf("FlushFileBuffers failed\n");
goto out;
}
/* Reopen the volume (we already have a lock) */
d_handle = GetDriveHandle(num, (char*)drive_name, TRUE, FALSE);
if (d_handle == INVALID_HANDLE_VALUE) {
uprintf("Could open volume for syslinux operation\n");
FormatStatus = ERROR_SEVERITY_ERROR|FAC(FACILITY_STORAGE)|ERROR_OPEN_FAILED;
goto out;
}
/* Map the file (is there a better way to do this?) */
ldlinux_sectors = (syslinux_ldlinux_len + 2 * ADV_SIZE + SECTOR_SIZE - 1) >> SECTOR_SHIFT;
sectors = (libfat_sector_t*) calloc(ldlinux_sectors, sizeof *sectors);
fs = libfat_open(libfat_readfile, (intptr_t) d_handle);
ldlinux_cluster = libfat_searchdir(fs, 0, "LDLINUX SYS", NULL);
secp = sectors;
nsectors = 0;
s = libfat_clustertosector(fs, ldlinux_cluster);
while (s && nsectors < ldlinux_sectors) {
*secp++ = s;
nsectors++;
s = libfat_nextsector(fs, s);
}
libfat_close(fs);
/* Patch ldlinux.sys and the boot sector */
syslinux_patch(sectors, nsectors, 0, 0, NULL, NULL);
/* Rewrite the file */
if (SetFilePointer(f_handle, 0, NULL, FILE_BEGIN) != 0 ||
!WriteFile(f_handle, syslinux_ldlinux, syslinux_ldlinux_len,
&bytes_written, NULL)
|| bytes_written != syslinux_ldlinux_len) {
uprintf("Could not write ldlinux.sys: %s\n", WindowsErrorString());
goto out;
}
/* Close file */
safe_closehandle(f_handle);
/* Make the syslinux boot sector */
if (SetFilePointer(d_handle, 0, NULL, FILE_BEGIN) != 0 ||
!ReadFile(d_handle, sectbuf, SECTOR_SIZE,
&bytes_read, NULL)
|| bytes_read != SECTOR_SIZE) {
uprintf("Could not read boot record: %s\n", WindowsErrorString());
goto out;
}
syslinux_make_bootsect(sectbuf);
if (SetFilePointer(d_handle, 0, NULL, FILE_BEGIN) != 0 ||
!WriteFile(d_handle, sectbuf, SECTOR_SIZE,
&bytes_written, NULL)
|| bytes_written != SECTOR_SIZE) {
uprintf("Could not write boot record: %s\n", WindowsErrorString());
goto out;
}
r = TRUE;
out:
safe_closehandle(d_handle);
safe_closehandle(f_handle);
return r;
}