Ported xnu to relocator framework
This commit is contained in:
Vladimir 'phcoder' Serbinenko
parent
bbd46b0966
commit
159194989d
9 changed files with 53 additions and 284 deletions
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@ -30,6 +30,8 @@
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#include <grub/term.h>
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char grub_xnu_cmdline[1024];
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grub_uint32_t grub_xnu_heap_will_be_at;
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grub_uint32_t grub_xnu_entry_point, grub_xnu_arg1, grub_xnu_stack;
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/* Aliases set for some tables. */
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struct tbl_alias
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@ -44,21 +46,6 @@ struct tbl_alias table_aliases[] =
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{GRUB_EFI_ACPI_TABLE_GUID, "ACPI"},
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};
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/* The following function is used to be able to debug xnu loader
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with grub-emu. */
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#ifdef GRUB_UTIL
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static grub_err_t
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grub_xnu_launch (void)
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{
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grub_printf ("Fake launch %x:%p:%p", grub_xnu_entry_point, grub_xnu_arg1,
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grub_xnu_stack);
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grub_getkey ();
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return 0;
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}
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#else
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static void (*grub_xnu_launch) (void) = 0;
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#endif
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static int
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utf16_strlen (grub_uint16_t *in)
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{
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@ -417,6 +404,19 @@ grub_cpu_xnu_fill_devicetree (void)
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return GRUB_ERR_NONE;
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}
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grub_err_t
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grub_xnu_boot_resume (void)
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{
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struct grub_relocator32_state state;
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state.esp = grub_xnu_stack;
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state.eip = grub_xnu_entry_point;
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state.eax = grub_xnu_arg1;
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return grub_relocator32_boot (grub_xnu_heap_start, grub_xnu_heap_will_be_at,
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state);
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}
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/* Boot xnu. */
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grub_err_t
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grub_xnu_boot (void)
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@ -434,6 +434,7 @@ grub_xnu_boot (void)
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void *devtree;
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grub_size_t devtreelen;
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int i;
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struct grub_relocator32_state state;
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/* Page-align to avoid following parts to be inadvertently freed. */
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err = grub_xnu_align_heap (GRUB_XNU_PAGESIZE);
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@ -501,7 +502,8 @@ grub_xnu_boot (void)
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grub_memcpy (bootparams_relloc->cmdline, grub_xnu_cmdline,
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sizeof (bootparams_relloc->cmdline));
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bootparams_relloc->devtree = ((char *) devtree - grub_xnu_heap_start)
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bootparams_relloc->devtree
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= ((grub_uint8_t *) devtree - (grub_uint8_t *) grub_xnu_heap_start)
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+ grub_xnu_heap_will_be_at;
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bootparams_relloc->devtreelen = devtreelen;
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@ -529,12 +531,7 @@ grub_xnu_boot (void)
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grub_xnu_stack = bootparams_relloc->heap_start
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+ bootparams_relloc->heap_size + GRUB_XNU_PAGESIZE;
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grub_xnu_arg1 = bootparams_relloc_off + grub_xnu_heap_will_be_at;
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#ifndef GRUB_UTIL
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grub_xnu_launch = (void (*) (void))
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(grub_xnu_heap_start + grub_xnu_heap_size);
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#endif
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grub_dprintf ("xnu", "eip=%x\n", grub_xnu_entry_point);
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grub_dprintf ("xnu", "launch=%p\n", grub_xnu_launch);
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const char *debug = grub_env_get ("debug");
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@ -560,16 +557,12 @@ grub_xnu_boot (void)
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bootparams_relloc->lfb_base = 0;
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}
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grub_memcpy (grub_xnu_heap_start + grub_xnu_heap_size,
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grub_xnu_launcher_start,
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grub_xnu_launcher_end - grub_xnu_launcher_start);
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if (! grub_autoefi_finish_boot_services ())
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return grub_error (GRUB_ERR_IO, "can't exit boot services");
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grub_xnu_launch ();
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/* Never reaches here. */
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return 0;
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state.eip = grub_xnu_entry_point;
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state.eax = grub_xnu_arg1;
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state.esp = grub_xnu_stack;
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return grub_relocator32_boot (grub_xnu_heap_start, grub_xnu_heap_will_be_at,
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state);
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}
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@ -1,211 +0,0 @@
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2009 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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#include <grub/symbol.h>
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.p2align 4 /* force 16-byte alignment */
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VARIABLE(grub_xnu_launcher_start)
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base:
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cli
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#ifndef __x86_64__
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/* mov imm32, %eax */
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.byte 0xb8
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VARIABLE(grub_xnu_heap_will_be_at)
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.long 0
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mov %eax, %edi
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/* mov imm32, %eax */
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.byte 0xb8
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VARIABLE(grub_xnu_heap_start)
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.long 0
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mov %eax, %esi
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/* mov imm32, %ecx */
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.byte 0xb9
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VARIABLE(grub_xnu_heap_size)
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.long 0
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mov %edi, %eax
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add %ecx, %eax
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/* %rax now contains our starting position after relocation. */
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/* One more page to copy: ourselves. */
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add $0x403, %ecx
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shr $2, %ecx
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/* Forward copy. */
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cld
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rep
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movsl
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mov %eax, %esi
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add $(cont0-base), %eax
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jmp *%eax
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cont0:
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#else
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xorq %rax, %rax
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/* mov imm32, %eax */
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.byte 0xb8
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VARIABLE(grub_xnu_heap_will_be_at)
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.long 0
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mov %rax, %rdi
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/* mov imm32, %rax */
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.byte 0x48
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.byte 0xb8
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VARIABLE(grub_xnu_heap_start)
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.long 0
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.long 0
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mov %rax, %rsi
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/* mov imm32, %rcx */
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.byte 0x48
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.byte 0xb9
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VARIABLE(grub_xnu_heap_size)
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.long 0
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.long 0
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mov %rdi, %rax
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add %rcx, %rax
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/* %rax now contains our starting position after relocation. */
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/* One more page to copy: ourselves. */
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add $0x403, %rcx
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shr $2, %rcx
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/* Forward copy. */
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cld
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rep
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movsl
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mov %rax, %rsi
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#ifdef APPLE_CC
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add $(cont0-base), %eax
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#else
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add $(cont0-base), %rax
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#endif
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jmp *%rax
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cont0:
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#ifdef APPLE_CC
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lea (cont1 - base) (%esi, 1), %eax
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mov %eax, (jump_vector - base) (%esi, 1)
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lea (gdt - base) (%esi, 1), %eax
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mov %eax, (gdt_addr - base) (%esi, 1)
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/* Switch to compatibility mode. */
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lgdt (gdtdesc - base) (%esi, 1)
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/* Update %cs. Thanks to David Miller for pointing this mistake out. */
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ljmp *(jump_vector - base) (%esi,1)
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#else
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lea (cont1 - base) (%rsi, 1), %rax
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mov %eax, (jump_vector - base) (%rsi, 1)
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lea (gdt - base) (%rsi, 1), %rax
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mov %rax, (gdt_addr - base) (%rsi, 1)
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/* Switch to compatibility mode. */
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lgdt (gdtdesc - base) (%rsi, 1)
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/* Update %cs. Thanks to David Miller for pointing this mistake out. */
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ljmp *(jump_vector - base) (%rsi, 1)
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#endif
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cont1:
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.code32
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/* Update other registers. */
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mov $0x18, %eax
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mov %eax, %ds
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mov %eax, %es
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mov %eax, %fs
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mov %eax, %gs
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mov %eax, %ss
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/* Disable paging. */
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mov %cr0, %eax
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and $0x7fffffff, %eax
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mov %eax, %cr0
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/* Disable amd64. */
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mov $0xc0000080, %ecx
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rdmsr
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and $0xfffffeff, %eax
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wrmsr
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/* Turn off PAE. */
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movl %cr4, %eax
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and $0xffffffcf, %eax
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mov %eax, %cr4
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jmp cont2
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cont2:
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#endif
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.code32
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/* Registers on XNU boot: eip, esp and eax. */
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/* mov imm32, %ecx */
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.byte 0xb9
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VARIABLE (grub_xnu_entry_point)
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.long 0
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/* mov imm32, %eax */
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.byte 0xb8
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VARIABLE (grub_xnu_arg1)
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.long 0
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/* mov imm32, %ebx */
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.byte 0xbb
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VARIABLE (grub_xnu_stack)
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.long 0
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movl %ebx, %esp
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jmp *%ecx
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#ifdef __x86_64__
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/* GDT. Copied from loader/i386/linux.c. */
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.p2align 4
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gdt:
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/* NULL. */
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.byte 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
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/* Reserved. */
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.byte 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
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/* Code segment. */
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.byte 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x9A, 0xCF, 0x00
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/* Data segment. */
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.byte 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x92, 0xCF, 0x00
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gdtdesc:
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.word 31
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gdt_addr:
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/* Filled by the code. */
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.quad 0
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.p2align 4
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jump_vector:
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/* Jump location. Is filled by the code */
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.long 0
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.long 0x10
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#endif
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VARIABLE(grub_xnu_launcher_end)
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