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LoongArch: Calculate various sizes in the linker script

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Taking the address delta between symbols in different sections is not
supported by the LLVM IAS. Instead, do this in the linker script, so
the same data can be properly referenced in assembly.

Signed-off-by: WANG Rui <wangrui@loongson.cn>
Signed-off-by: WANG Xuerui <git@xen0n.name>
[chenhuacai: Fix build with !CONFIG_EFI_STUB]
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
This commit is contained in:
WANG Rui 2023-06-29 20:58:42 +08:00 committed by Huacai Chen
parent 0d03e9dce5
commit 414cefc798
3 changed files with 16 additions and 7 deletions
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6
arch/loongarch/kernel/efi-header.S
View File

@ -24,7 +24,7 @@
.byte 0x02 /* MajorLinkerVersion */
.byte 0x14 /* MinorLinkerVersion */
.long __inittext_end - .Lefi_header_end /* SizeOfCode */
.long _end - __initdata_begin /* SizeOfInitializedData */
.long _kernel_vsize /* SizeOfInitializedData */
.long 0 /* SizeOfUninitializedData */
.long __efistub_efi_pe_entry - _head /* AddressOfEntryPoint */
.long .Lefi_header_end - _head /* BaseOfCode */
@ -79,9 +79,9 @@
IMAGE_SCN_MEM_EXECUTE /* Characteristics */
.ascii ".data\0\0\0"
.long _end - __initdata_begin /* VirtualSize */
.long _kernel_vsize /* VirtualSize */
.long __initdata_begin - _head /* VirtualAddress */
.long _edata - __initdata_begin /* SizeOfRawData */
.long _kernel_rsize /* SizeOfRawData */
.long __initdata_begin - _head /* PointerToRawData */
.long 0 /* PointerToRelocations */

8
arch/loongarch/kernel/head.S
View File

@ -23,7 +23,7 @@ _head:
.word MZ_MAGIC /* "MZ", MS-DOS header */
.org 0x8
.dword kernel_entry /* Kernel entry point */
.dword _end - _text /* Kernel image effective size */
.dword _kernel_asize /* Kernel image effective size */
.quad PHYS_LINK_KADDR /* Kernel image load offset from start of RAM */
.org 0x38 /* 0x20 ~ 0x37 reserved */
.long LINUX_PE_MAGIC
@ -32,9 +32,9 @@ _head:
pe_header:
__EFI_PE_HEADER
SYM_DATA(kernel_asize, .long _end - _text);
SYM_DATA(kernel_fsize, .long _edata - _text);
SYM_DATA(kernel_offset, .long kernel_offset - _text);
SYM_DATA(kernel_asize, .long _kernel_asize);
SYM_DATA(kernel_fsize, .long _kernel_fsize);
SYM_DATA(kernel_offset, .long _kernel_offset);
#endif

9
arch/loongarch/kernel/vmlinux.lds.S
View File

@ -136,6 +136,15 @@ SECTIONS
DWARF_DEBUG
ELF_DETAILS
#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_offset = kernel_offset - _text;
#endif
.gptab.sdata : {
*(.gptab.data)
*(.gptab.sdata)