diff options
Diffstat (limited to 'contrib/syslinux/syslinux-4.03/com32/modules/ifplop.c')
| -rw-r--r-- | contrib/syslinux/syslinux-4.03/com32/modules/ifplop.c | 170 |
1 files changed, 0 insertions, 170 deletions
diff --git a/contrib/syslinux/syslinux-4.03/com32/modules/ifplop.c b/contrib/syslinux/syslinux-4.03/com32/modules/ifplop.c deleted file mode 100644 index a846df8..0000000 --- a/contrib/syslinux/syslinux-4.03/com32/modules/ifplop.c +++ /dev/null @@ -1,170 +0,0 @@ -/* ----------------------------------------------------------------------- * - * - * Copyright 2010 Gert Hulselmans - All Rights Reserved - * - * 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., 51 Franklin St, Fifth Floor, - * Boston MA 02110-1301, USA; either version 2 of the License, or - * (at your option) any later version; incorporated herein by reference. - * - * ----------------------------------------------------------------------- */ - -/* - * ifplop.c - * - * This COM32 module detects if the PLoP Boot Manager was used to boot a CDROM - * drive or USB drive, by checking for the presence of the PLoP INT13h hook. - * - * Usage: ifplop.c32 [<plop_detected>] -- [<plop_not_detected>] - * Examples: ifplop.c32 menu.c32 another.cfg -- plpbt hiddenusb usb1=2 - * You need to remove the ".bin" extension of the plpbt.bin file - * if you use it this way. - * ifplop.c32 plop_detected -- plop_not_detected - * - * A possible config file could be: - * - * =========================================================================== - * DEFAULT plopcheck - * - * # Check for the presence of PLoP (run by default) - * # When PLoP INT13h hook is found, run the first command (plop_detected) - * # When PLoP INT13h hook isn't found, run the second command (plop_not_detected) - * LABEL plopcheck - * COM32 ifplop.c32 - * APPEND plop_detected -- plop_not_detected - * - * # When PLoP INT13h hook was found, boot the menu system. - * # PLoP can have added USB 2.0 speed, so the entries we want to boot - * # will be read from disk much faster (supposing that we have a BIOS - * # that only supports USB 1.1 speed, but a mobo with USB 2.0 controllers). - * LABEL plop_detected - * COM32 menu.c32 - * APPEND another.cfg - * - * # PLoP INT13h hook wasn't found, so we boot PLoP, so it can add USB 2.0 support - * # When using "LINUX plpbt.bin", you don't need to remove the .bin extension. - * LABEL plop_not_detected - * LINUX plpbt.bin - * APPEND hiddenusb usb1=2 - * - * =========================================================================== - * - * Why is/can this module be useful? - * - * You may want to boot PLoP by default from Syslinux when you boot from your - * USB stick/drive: - * 1. PLoP can upgrade USB 1.1 speed offered by the BIOS to USB 2.0 speed - * if you have USB 2.0 controllers on your mobo. - * 2. Some BIOSes only can access the first 128GiB (137GB) on USB drives, while - * internal hard drives don't necessarily suffer from this 128GiB problem. - * Using PLoPs USB capabilities, you can access the whole drive. - * - * When you select the "USB" entry in PLoP, it will boot your USB stick/drive - * again and it will boot PLoP again when you have set booting PLoP as DEFAULT - * boot option in your Syslinux configuration file. - * - * By using ifplop.c32 you can specify which action you want to do the second - * time your USB stick/drive is booted. So you can load another config file or - * boot a large hard disk image or whatever you want. - * - * PLoP Boot Manager website: http://www.plop.at/en/bootmanager.html - */ - -#include <com32.h> -#include <stdlib.h> -#include <stdio.h> -#include <string.h> -#include <alloca.h> -#include <console.h> -#include <syslinux/boot.h> - -static bool plop_INT13h_check(void) -{ - com32sys_t inregs, outregs; - - /* Prepare the register set */ - memset(&inregs, 0, sizeof inregs); - - /* - * Check if PLoP already has booted a CDROM or USB drive by checking - * for the presence of the PLoP INT13h hook. - * - * The following assembly code (NASM) can detect the PLoP INT13h hook: - * - * mov eax,'PoLP' ; Reverse of 'PLoP' - * mov ebp,'DKHC' ; Reverse of 'CHKD' - * int 13h - * cmp eax,' sey' ; Reverse of 'yes ' - * jz plop_INT13h_active - */ - - inregs.eax.l = 0x504c6f50; /* "PLoP" */ - inregs.ebp.l = 0x43484b44; /* "CHKD" */ - - __intcall(0x13, &inregs, &outregs); - - /* eax will contain "yes " if PLoP INT13h hook is available */ - if (outregs.eax.l == 0x79657320) - return true; - - return false; -} - -/* XXX: this really should be librarized */ -static void boot_args(char **args) -{ - int len = 0, a = 0; - char **pp; - const char *p; - char c, *q, *str; - - for (pp = args; *pp; pp++) - len += strlen(*pp) + 1; - - q = str = alloca(len); - for (pp = args; *pp; pp++) { - p = *pp; - while ((c = *p++)) - *q++ = c; - *q++ = ' '; - a = 1; - } - q -= a; - *q = '\0'; - - if (!str[0]) - syslinux_run_default(); - else - syslinux_run_command(str); -} - -int main(int argc, char *argv[]) -{ - char **args[2]; - int arg = 0; - - openconsole(&dev_null_r, &dev_stdcon_w); - - if (argc) - arg++; - args[0] = &argv[arg]; - args[1] = NULL; - while (arg < argc) { - if (!strcmp(argv[arg], "--")) { - argv[arg] = NULL; - args[1] = &argv[arg + 1]; - break; - } - arg++; - } - if (args[1] != NULL) { - boot_args(plop_INT13h_check()? args[0] : args[1]); - } else { - fprintf(stderr, - "Usage: ifplop.c32 [<plop_detected>] -- [<plop_not_detected>]\n" - "Example: ifplop.c32 menu.c32 another.cfg -- plpbt hiddenusb usb1=2\n"); - } - - return 0; -} |