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efi_loader: add Linux magic to RISC-V crt0

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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>
This commit is contained in:
Heinrich Schuchardt 2021-05-28 22:24:37 +02:00
parent 148ce20520
commit 17a50bd689
1 changed files with 5 additions and 2 deletions
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7
arch/riscv/lib/crt0_riscv_efi.S
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@ -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 */