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/* ----------------------------------------------------------------------- *
*
* Copyright 2007-2008 H. Peter Anvin - All Rights Reserved
* Copyright 2009 Intel Corporation; author: H. Peter Anvin
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom
* the Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall
* be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* ----------------------------------------------------------------------- */
/*
* mboot.c
*
* Module to load a multiboot kernel
*/
#include "mboot.h"
struct multiboot_info mbinfo;
struct syslinux_pm_regs regs;
struct module_data {
void *data;
size_t len;
const char *cmdline;
};
static int map_modules(struct module_data *modules, int nmodules)
{
struct mod_list *mod_list;
addr_t map_list = 0;
size_t list_size = nmodules * sizeof *mod_list;
int i;
mod_list = malloc(list_size);
if (!mod_list) {
printf("Failed to allocate module list\n");
return -1;
}
map_list = map_data(mod_list, list_size, 16, 0);
if (!map_list) {
printf("Cannot map module list\n");
return -1;
}
for (i = 0; i < nmodules; i++) {
addr_t mod_map = 0;
addr_t cmd_map = 0;
dprintf("Module %d cmdline: \"%s\"\n", i, modules[i].cmdline);
cmd_map = map_string(modules[i].cmdline);
mod_map = map_data(modules[i].data, modules[i].len, 4096, MAP_HIGH);
if (!mod_map) {
printf("Failed to map module (memory fragmentation issue?)\n");
return -1;
}
mod_list[i].mod_start = mod_map;
mod_list[i].mod_end = mod_map + modules[i].len;
mod_list[i].cmdline = cmd_map;
mod_list[i].pad = 0;
}
mbinfo.flags |= MB_INFO_MODS;
mbinfo.mods_count = nmodules;
mbinfo.mods_addr = map_list;
return 0;
}
static int get_modules(char **argv, struct module_data **mdp)
{
char **argp, **argx;
struct module_data *mp;
int rv;
int module_count = 1;
int arglen;
const char module_separator[] = "---";
for (argp = argv; *argp; argp++) {
if (!strcmp(*argp, module_separator))
module_count++;
}
*mdp = mp = malloc(module_count * sizeof(struct module_data));
if (!mp) {
error("Out of memory!\n");
return -1;
}
argp = argv;
while (*argp) {
/* Note: it seems Grub transparently decompresses all compressed files,
not just the primary kernel. */
printf("Loading %s... ", *argp);
rv = zloadfile(*argp, &mp->data, &mp->len);
if (rv) {
printf("failed!\n");
return -1;
}
printf("ok\n");
argp++;
arglen = 0;
for (argx = argp; *argx && strcmp(*argx, module_separator); argx++)
arglen += strlen(*argx)+1;
if (arglen == 0) {
mp->cmdline = strdup("");
} else {
char *p;
mp->cmdline = p = malloc(arglen);
for ( ; *argp && strcmp(*argp, module_separator); argp++) {
p = strpcpy(p, *argp);
*p++ = ' ';
}
*--p = '\0';
}
mp++;
if (*argp)
argp++; /* Advance past module_separator */
}
return module_count;
}
int main(int argc, char *argv[])
{
int nmodules;
struct module_data *modules;
bool keeppxe = false;
openconsole(&dev_null_r, &dev_stdcon_w);
if (argc < 2) {
error("Usage: mboot.c32 mboot_file args... [--- module args...]...\n");
return 1;
}
/* Load the files */
nmodules = get_modules(argv+1, &modules);
if (nmodules < 1) {
error("No modules found!\n");
return 1; /* Failure */
}
/*
* Map the primary image. This should be done before mapping anything
* else, since it will have fixed address requirements.
*/
if (map_image(modules[0].data, modules[0].len))
return 1;
/* Map the mbinfo structure */
regs.ebx = map_data(&mbinfo, sizeof mbinfo, 4, 0);
if (!regs.ebx) {
error("Failed to map Multiboot info structure!\n");
return 1;
}
/* Map the primary command line */
if (modules[0].cmdline) {
mbinfo.cmdline = map_string(modules[0].cmdline);
dprintf("Main cmdline: \"%s\"\n", modules[0].cmdline);
if (mbinfo.cmdline)
mbinfo.flags |= MB_INFO_CMDLINE;
}
/* Map auxilliary images */
if (nmodules > 1) {
if (map_modules(modules+1, nmodules-1))
return 1;
}
/* Add auxilliary information */
mboot_make_memmap();
mboot_apm();
/* Run it */
mboot_run(keeppxe ? 3 : 0);
error("mboot.c32: boot failed\n");
return 1;
}
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