diff options
| author | Atish Patra <atish.patra@wdc.com> | 2020-09-18 01:37:13 +0300 |
|---|---|---|
| committer | Palmer Dabbelt <palmerdabbelt@google.com> | 2020-10-03 00:31:16 +0300 |
| commit | cb7d2dd5612a77a2597c00fce770a52c921e2ea5 (patch) | |
| tree | 99d82b1126b5fd909e0253276e827a946a0daefd /arch/riscv/kernel/vmlinux.lds.S | |
| parent | e8dcb61f2ade040a372d66907d220dd3fdee2505 (diff) | |
| download | linux-cb7d2dd5612a77a2597c00fce770a52c921e2ea5.tar.xz | |
RISC-V: Add PE/COFF header for EFI stub
Linux kernel Image can appear as an EFI application With appropriate
PE/COFF header fields in the beginning of the Image header. An EFI
application loader can directly load a Linux kernel Image and an EFI
stub residing in kernel can boot Linux kernel directly.
Add the necessary PE/COFF header.
Signed-off-by: Atish Patra <atish.patra@wdc.com>
Link: https://lore.kernel.org/r/20200421033336.9663-3-atish.patra@wdc.com
[ardb: - use C prefix for c.li to ensure the expected opcode is emitted
- align all image sections according to PE/COFF section alignment ]
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Diffstat (limited to 'arch/riscv/kernel/vmlinux.lds.S')
| -rw-r--r-- | arch/riscv/kernel/vmlinux.lds.S | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/arch/riscv/kernel/vmlinux.lds.S b/arch/riscv/kernel/vmlinux.lds.S index f3586e31ed1e..9795359cb9da 100644 --- a/arch/riscv/kernel/vmlinux.lds.S +++ b/arch/riscv/kernel/vmlinux.lds.S @@ -10,6 +10,7 @@ #include <asm/cache.h> #include <asm/thread_info.h> #include <asm/set_memory.h> +#include "image-vars.h" #include <linux/sizes.h> OUTPUT_ARCH(riscv) @@ -17,6 +18,9 @@ ENTRY(_start) jiffies = jiffies_64; +PECOFF_SECTION_ALIGNMENT = 0x1000; +PECOFF_FILE_ALIGNMENT = 0x200; + SECTIONS { /* Beginning of code and text segment */ @@ -67,6 +71,11 @@ SECTIONS _etext = .; } +#ifdef CONFIG_EFI + . = ALIGN(PECOFF_SECTION_ALIGNMENT); + __pecoff_text_end = .; +#endif + /* Start of data section */ _sdata = .; RO_DATA(SECTION_ALIGN) @@ -83,16 +92,26 @@ SECTIONS .sdata : { __global_pointer$ = . + 0x800; *(.sdata*) - /* End of data section */ - _edata = .; } +#ifdef CONFIG_EFI + .pecoff_edata_padding : { BYTE(0); . = ALIGN(PECOFF_FILE_ALIGNMENT); } + __pecoff_data_raw_size = ABSOLUTE(. - __pecoff_text_end); +#endif + + /* End of data section */ + _edata = .; + BSS_SECTION(PAGE_SIZE, PAGE_SIZE, 0) .rel.dyn : { *(.rel.dyn*) } +#ifdef CONFIG_EFI + . = ALIGN(PECOFF_SECTION_ALIGNMENT); + __pecoff_data_virt_size = ABSOLUTE(. - __pecoff_text_end); +#endif _end = .; STABS_DEBUG |