* [PATCH 1/1] efi_loader: add Linux magic to RISC-V crt0
@ 2021-08-14 6:47 Heinrich Schuchardt
0 siblings, 0 replies; only message in thread
From: Heinrich Schuchardt @ 2021-08-14 6:47 UTC (permalink / raw)
To: u-boot; +Cc: Rick Chen, Leo, Atish Patra, Bin Meng, Heinrich Schuchardt
Add the Linux magic to the EFI file header to allow running our test
programs with GRUB's linux command.
MajorImageVersion = 1 indicates a kernel that can consume the
EFI_LOAD_FILE2_PROTOCOL. This allows to dump the GRUB provided intird with
our initrddump.efi tool.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
---
arch/riscv/lib/crt0_riscv_efi.S | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/arch/riscv/lib/crt0_riscv_efi.S b/arch/riscv/lib/crt0_riscv_efi.S
index e7c4d99c21..b0a7a39a72 100644
--- a/arch/riscv/lib/crt0_riscv_efi.S
+++ b/arch/riscv/lib/crt0_riscv_efi.S
@@ -33,7 +33,10 @@
.globl ImageBase
ImageBase:
.short IMAGE_DOS_SIGNATURE /* 'MZ' */
- .skip 58 /* 'MZ' + pad + offset == 64 */
+ .skip 46 /* 'MZ' + pad + offset == 64 */
+ .long 0x43534952 /* Linux magic "RISCV */
+ .long 0x00000056
+ .long 0x05435352 /* Linux magic2 "RSC\x05*/
.long pe_header - ImageBase /* Offset to the PE header */
pe_header:
.long IMAGE_NT_SIGNATURE /* 'PE' */
@@ -72,7 +75,7 @@ extra_header_fields:
.long 0x8 /* FileAlignment */
.short 0 /* MajorOperatingSystemVersion */
.short 0 /* MinorOperatingSystemVersion */
- .short 0 /* MajorImageVersion */
+ .short 1 /* MajorImageVersion */
.short 0 /* MinorImageVersion */
.short 0 /* MajorSubsystemVersion */
.short 0 /* MinorSubsystemVersion */
--
2.30.2
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2021-08-14 6:47 [PATCH 1/1] efi_loader: add Linux magic to RISC-V crt0 Heinrich Schuchardt
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