vbatts/grub
1
0
Fork 0
Code Issues Pull requests Releases Wiki Activity

2009-05-17 Vladimir Serbinenko <phcoder@gmail.com>

Browse source 
trampoline for linux on 64-bit platform

	* conf/x86_64-efi.rmk (linux_mod_SOURCES): added 
	loader/i386/efi/linux_trampoline.S 
	* include/grub/x86_64/efi/loader.h (grub_linux_real_boot): removed 
	declration
	* kern/x86_64/efi/startup.S (grub_linux_real_boot): moved from here
	* loader/i386/linux_trampoline.S: moved here
	* loader/i386/efi/linux.c (allocate_pages): reserve space for trampoline
	(jumpvector): removed
	(grub_linux_trampoline_start): new declaration
	(grub_linux_trampoline_end): likewise
	(grub_linux_boot): use trampoline when on 64-bit platform
	* loader/i386/linux.c: likewise
This commit is contained in:
phcoder 2009-05-17 11:27:08 +00:00
parent cb5a0f40a3
commit 22f53a96fd
7 changed files with 157 additions and 60 deletions
Download patch file Download diff file Expand all files Collapse all files

29
loader/i386/linux.c
View file

@ -433,11 +433,8 @@ grub_linux_setup_video (struct linux_kernel_params *params)
}
#ifdef __x86_64__
struct
{
grub_uint32_t kernel_entry;
grub_uint32_t kernel_cs;
} jumpvector;
extern grub_uint8_t grub_linux_trampoline_start[];
extern grub_uint8_t grub_linux_trampoline_end[];
#endif
static grub_err_t
@ -549,6 +546,16 @@ grub_linux_boot (void)
grub_mmap_iterate (hook);
params->mmap_size = e820_num;
#ifdef __x86_64__
grub_memcpy ((char *) prot_mode_mem + (prot_mode_pages << 12),
grub_linux_trampoline_start,
grub_linux_trampoline_end - grub_linux_trampoline_start);
((void (*) (unsigned long, void *)) ((char *) prot_mode_mem
+ (prot_mode_pages << 12)))
(params->code32_start, real_mode_mem);
#else
/* Hardware interrupts are not safe any longer. */
asm volatile ("cli" : : );
@ -557,18 +564,6 @@ grub_linux_boot (void)
asm volatile ("lidt %0" : : "m" (idt_desc));
asm volatile ("lgdt %0" : : "m" (gdt_desc));
#ifdef __x86_64__
jumpvector.kernel_entry = (grub_uint64_t) grub_linux_real_boot;
jumpvector.kernel_cs = 0x10;
asm volatile ( "mov %0, %%rbx" : : "m" (params->code32_start));
asm volatile ( "mov %0, %%rsi" : : "m" (real_mode_mem));
asm volatile ( "ljmp *%0" : : "m" (jumpvector));
#else
/* Pass parameters. */
asm volatile ("movl %0, %%ecx" : : "m" (params->code32_start));
asm volatile ("movl %0, %%esi" : : "m" (real_mode_mem));