mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-02 23:27:06 +00:00
LoongArch: Fix entry point in kernel image header
[ Upstream commit beb2800074
]
Currently kernel entry in head.S is in DMW address range, firmware is
instructed to jump to this address after loading the kernel image.
However kernel should not make any assumption on firmware's DMW
setting, thus the entry point should be a physical address falls into
direct translation region.
Fix by converting entry address to physical and amend entry calculation
logic in libstub accordingly.
BTW, use ABSOLUTE() to calculate variables to make Clang/LLVM happy.
Cc: stable@vger.kernel.org
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
parent
eae6e7dbd1
commit
988a03e31e
3 changed files with 8 additions and 6 deletions
|
@ -22,7 +22,7 @@
|
|||
_head:
|
||||
.word MZ_MAGIC /* "MZ", MS-DOS header */
|
||||
.org 0x8
|
||||
.dword kernel_entry /* Kernel entry point */
|
||||
.dword _kernel_entry /* Kernel entry point (physical address) */
|
||||
.dword _kernel_asize /* Kernel image effective size */
|
||||
.quad PHYS_LINK_KADDR /* Kernel image load offset from start of RAM */
|
||||
.org 0x38 /* 0x20 ~ 0x37 reserved */
|
||||
|
|
|
@ -5,6 +5,7 @@
|
|||
|
||||
#define PAGE_SIZE _PAGE_SIZE
|
||||
#define RO_EXCEPTION_TABLE_ALIGN 4
|
||||
#define PHYSADDR_MASK 0xffffffffffff /* 48-bit */
|
||||
|
||||
/*
|
||||
* Put .bss..swapper_pg_dir as the first thing in .bss. This will
|
||||
|
@ -139,10 +140,11 @@ SECTIONS
|
|||
|
||||
#ifdef CONFIG_EFI_STUB
|
||||
/* header symbols */
|
||||
_kernel_asize = _end - _text;
|
||||
_kernel_fsize = _edata - _text;
|
||||
_kernel_vsize = _end - __initdata_begin;
|
||||
_kernel_rsize = _edata - __initdata_begin;
|
||||
_kernel_entry = ABSOLUTE(kernel_entry & PHYSADDR_MASK);
|
||||
_kernel_asize = ABSOLUTE(_end - _text);
|
||||
_kernel_fsize = ABSOLUTE(_edata - _text);
|
||||
_kernel_vsize = ABSOLUTE(_end - __initdata_begin);
|
||||
_kernel_rsize = ABSOLUTE(_edata - __initdata_begin);
|
||||
#endif
|
||||
|
||||
.gptab.sdata : {
|
||||
|
|
|
@ -41,7 +41,7 @@ static efi_status_t exit_boot_func(struct efi_boot_memmap *map, void *priv)
|
|||
unsigned long __weak kernel_entry_address(unsigned long kernel_addr,
|
||||
efi_loaded_image_t *image)
|
||||
{
|
||||
return *(unsigned long *)(kernel_addr + 8) - VMLINUX_LOAD_ADDRESS + kernel_addr;
|
||||
return *(unsigned long *)(kernel_addr + 8) - PHYSADDR(VMLINUX_LOAD_ADDRESS) + kernel_addr;
|
||||
}
|
||||
|
||||
efi_status_t efi_boot_kernel(void *handle, efi_loaded_image_t *image,
|
||||
|
|
Loading…
Reference in a new issue