ae88bca301
* kern/ieee1275/init.c (grub_machine_set_prefix): If `grub_prefix'
is non-empty, use it to set the `prefix' environment variable instead
of the usual approach.
* kern/i386/linuxbios/init.c (make_install_device): Remove function.
(grub_machine_set_prefix): Use `grub_prefix' to set the `prefix'
environment variable instead of dummy make_install_device().
* kern/i386/ieee1275/startup.S: Include `<grub/machine/kernel.h>'.
(start): Insert a data section, with `grub_prefix' variable.
* kern/i386/linuxbios/startup.S: Likewise.
* include/grub/powerpc/ieee1275/kernel.h [!ASM_FILE] (grub_prefix):
New variable reference.
* include/grub/i386/ieee1275/kernel.h (GRUB_KERNEL_MACHINE_PREFIX):
New macro. Defines offset of `grub_prefix' within startup.S (relative
to `start').
(GRUB_KERNEL_MACHINE_DATA_END): New macro. Defines the end of data
section within startup.S (relative to `start').
* include/grub/i386/coreboot/kernel.h: Likewise.
* util/elf/grub-mkimage.c (add_segments): Receive `prefix' parameter.
Overwrite grub_prefix with its contents, at the beginning of the
first segment.
(main): Understand -p|--prefix.
95 lines
2.4 KiB
ArmAsm
95 lines
2.4 KiB
ArmAsm
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 1999,2000,2001,2002,2003,2005,2006,2007 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#define ASM_FILE 1
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#include <grub/symbol.h>
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#include <grub/machine/kernel.h>
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#include <grub/machine/memory.h>
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#include <grub/cpu/linux.h>
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#include <multiboot.h>
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#include <multiboot2.h>
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/*
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* Note: GRUB is compiled with the options -mrtd and -mregparm=3.
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* So the first three arguments are passed in %eax, %edx, and %ecx,
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* respectively, and if a function has a fixed number of arguments
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* and the number if greater than three, the function must return
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* with "ret $N" where N is ((the number of arguments) - 3) * 4.
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*/
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.file "startup.S"
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.text
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.globl start, _start
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start:
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_start:
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jmp codestart
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/*
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* This is a special data area at a fixed offset from the beginning.
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*/
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. = EXT_C(start) + GRUB_KERNEL_MACHINE_PREFIX
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VARIABLE(grub_prefix)
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/* to be filled by grub-mkimage */
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/*
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* Leave some breathing room for the prefix.
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*/
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. = EXT_C(start) + GRUB_KERNEL_MACHINE_DATA_END
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#if 0
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/*
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* Support for booting GRUB from a Multiboot boot loader (e.g. GRUB itself).
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*/
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multiboot_header:
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/* magic */
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.long 0x1BADB002
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/* flags */
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.long 0
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/* checksum */
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.long -0x1BADB002
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#endif
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codestart:
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/* initialize the stack */
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movl $GRUB_MEMORY_MACHINE_PROT_STACK, %esp
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/* jump to the main body of C code */
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jmp EXT_C(grub_main)
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/*
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* This call is special... it never returns... in fact it should simply
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* hang at this point!
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*/
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FUNCTION(grub_stop)
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hlt
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jmp EXT_C(grub_stop)
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/*
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* prot_to_real and associated structures (but NOT real_to_prot, that is
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* only needed for BIOS gates).
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*/
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#include "../realmode.S"
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/*
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* Routines needed by Linux and Multiboot loaders.
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*/
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#include "../loader.S"
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