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x86/boot: Grab kernel_info offset from zoffset header directly

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[ Commit 2e765c02dcbfc2a8a4527c621a84b9502f6b9bd2 upstream ]

Instead of parsing zoffset.h and poking the kernel_info offset value
into the header from the build tool, just grab the value directly in the
asm file that describes this header.

This change has no impact on the resulting bzImage binary.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20230915171623.655440-11-ardb@google.com
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ard Biesheuvel
2024-04-19 10:11:15 +02:00
committed by Greg Kroah-Hartman
parent 67b8dc5089
commit e1380c923c
2 changed files with 1 additions and 5 deletions
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2
arch/x86/boot/header.S
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@@ -525,7 +525,7 @@ pref_address: .quad LOAD_PHYSICAL_ADDR # preferred load addr
init_size: .long INIT_SIZE # kernel initialization size
handover_offset: .long 0 # Filled in by build.c
kernel_info_offset: .long 0 # Filled in by build.c
kernel_info_offset: .long ZO_kernel_info
# End of setup header #####################################################

4
arch/x86/boot/tools/build.c
View File

@@ -59,7 +59,6 @@ static unsigned long efi32_stub_entry;
static unsigned long efi64_stub_entry;
static unsigned long efi_pe_entry;
static unsigned long efi32_pe_entry;
static unsigned long kernel_info;
static unsigned long _end;
/*----------------------------------------------------------------------*/
@@ -337,7 +336,6 @@ static void parse_zoffset(char *fname)
PARSE_ZOFS(p, efi64_stub_entry);
PARSE_ZOFS(p, efi_pe_entry);
PARSE_ZOFS(p, efi32_pe_entry);
PARSE_ZOFS(p, kernel_info);
PARSE_ZOFS(p, _end);
p = strchr(p, '\n');
@@ -419,8 +417,6 @@ int main(int argc, char ** argv)
update_pecoff_text(setup_sectors * 512, i + (sys_size * 16));
efi_stub_entry_update();
/* Update kernel_info offset. */
put_unaligned_le32(kernel_info, &buf[0x268]);
crc = partial_crc32(buf, i, crc);
if (fwrite(buf, 1, i, dest) != i)