diff --git a/ChangeLog b/ChangeLog index c097af2f7..9922f2a2b 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,10 @@ +2011-06-27 Vladimir Serbinenko + + Chainloading on coreboot support. + + * grub-core/Makefile.core.def (chain): Add coreboot. + * grub-core/loader/i386/coreboot/chainloader.c: New file. + 2011-06-27 Vladimir Serbinenko * grub-core/loader/i386/bsd.c (grub_bsd_load): Handle relocator failure diff --git a/grub-core/Makefile.core.def b/grub-core/Makefile.core.def index b10c16d55..faed6cc85 100644 --- a/grub-core/Makefile.core.def +++ b/grub-core/Makefile.core.def @@ -1298,7 +1298,9 @@ module = { name = chain; efi = loader/efi/chainloader.c; i386_pc = loader/i386/pc/chainloader.c; + i386_coreboot = loader/i386/corepayload.c; enable = i386_pc; + enable = i386_coreboot; enable = efi; }; diff --git a/grub-core/loader/i386/coreboot/chainloader.c b/grub-core/loader/i386/coreboot/chainloader.c new file mode 100644 index 000000000..3f85aa3a9 --- /dev/null +++ b/grub-core/loader/i386/coreboot/chainloader.c @@ -0,0 +1,145 @@ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2011 Free Software Foundation, Inc. + * + * GRUB 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, either version 3 of the License, or + * (at your option) any later version. + * + * GRUB is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GRUB. If not, see . + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +GRUB_MOD_LICENSE ("GPLv3+"); + +static grub_addr_t entry; +static struct grub_relocator *relocator = NULL; + +static grub_err_t +grub_chain_boot (void) +{ + struct grub_relocator32_state state; + + grub_video_set_mode ("text", 0, 0); + + state.eip = entry; + return grub_relocator32_boot (relocator, state); +} + +static grub_err_t +grub_chain_unload (void) +{ + grub_relocator_unload (relocator); + relocator = NULL; + + return GRUB_ERR_NONE; +} + +static grub_err_t +grub_chain_elf32_hook (Elf32_Phdr * phdr, grub_addr_t * addr, int *do_load) +{ + grub_err_t err; + grub_relocator_chunk_t ch; + + if (phdr->p_type != PT_LOAD) + { + *do_load = 0; + return 0; + } + + *do_load = 1; + err = grub_relocator_alloc_chunk_addr (relocator, &ch, + phdr->p_paddr, phdr->p_memsz); + if (err) + return err; + + *addr = (grub_addr_t) get_virtual_current_address (ch); + + return GRUB_ERR_NONE; +} + + +static grub_err_t +grub_cmd_chain (grub_command_t cmd __attribute__ ((unused)), + int argc, char *argv[]) +{ + grub_err_t err; + grub_file_t file; + grub_elf_t elf; + + if (argc != 1) + return grub_error (GRUB_ERR_BAD_ARGUMENT, "filename expected"); + + grub_loader_unset (); + + file = grub_file_open (argv[0]); + if (!file) + return grub_errno; + + relocator = grub_relocator_new (); + if (!relocator) + { + grub_file_close (file); + return grub_errno; + } + + elf = grub_elf_file (file); + if (!elf) + { + grub_relocator_unload (relocator); + relocator = 0; + grub_file_close (file); + } + + if (!grub_elf_is_elf32 (elf)) + { + grub_relocator_unload (relocator); + relocator = 0; + grub_elf_close (elf); + } + + entry = elf->ehdr.ehdr32.e_entry & 0xFFFFFF; + + err = grub_elf32_load (elf, grub_chain_elf32_hook, 0, 0); + + grub_elf_close (elf); + if (err) + return err; + + grub_loader_set (grub_chain_boot, grub_chain_unload, 0); + return GRUB_ERR_NONE; +} + +static grub_command_t cmd_chain; + +GRUB_MOD_INIT (chain) +{ + cmd_chain = grub_register_command ("chainloader", grub_cmd_chain, + N_("FILE"), N_("Load another payload")); +} + +GRUB_MOD_FINI (chain) +{ + grub_unregister_command (cmd_chain); + grub_chain_unload (); +}