diff options
| author | Ard Biesheuvel <ardb@kernel.org> | 2019-12-24 16:10:17 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2019-12-25 10:49:22 +0100 |
| commit | c3710de5065d63f8b16d160a118cc50ae09050b4 (patch) | |
| tree | 023f9c6679ccc77a2ff56948b3319aaf0f3fbba2 /arch/x86/boot/compressed/head_32.S | |
| parent | dc29da14ed94a005ed2a590ec86aa8a572fea4a9 (diff) | |
| download | lwn-c3710de5065d63f8b16d160a118cc50ae09050b4.tar.gz lwn-c3710de5065d63f8b16d160a118cc50ae09050b4.zip | |
efi/libstub/x86: Drop __efi_early() export and efi_config struct
The various pointers we stash in the efi_config struct which we
retrieve using __efi_early() are simply copies of the ones in
the EFI system table, which we have started accessing directly
in the previous patch. So drop all the __efi_early() related
plumbing, as well as all the assembly code dealing with efi_config,
which allows us to move the PE/COFF entry point to C code as well.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Cc: Arvind Sankar <nivedita@alum.mit.edu>
Cc: Borislav Petkov <bp@alien8.de>
Cc: James Morse <james.morse@arm.com>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-efi@vger.kernel.org
Link: https://lkml.kernel.org/r/20191224151025.32482-18-ardb@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/boot/compressed/head_32.S')
| -rw-r--r-- | arch/x86/boot/compressed/head_32.S | 58 |
1 files changed, 2 insertions, 56 deletions
diff --git a/arch/x86/boot/compressed/head_32.S b/arch/x86/boot/compressed/head_32.S index 0b03dc7bba12..e43ac17cb9fb 100644 --- a/arch/x86/boot/compressed/head_32.S +++ b/arch/x86/boot/compressed/head_32.S @@ -145,63 +145,16 @@ SYM_FUNC_START(startup_32) SYM_FUNC_END(startup_32) #ifdef CONFIG_EFI_STUB -/* - * We don't need the return address, so set up the stack so efi_main() can find - * its arguments. - */ -SYM_FUNC_START(efi_pe_entry) - add $0x4, %esp - - call 1f -1: popl %esi - subl $1b, %esi - - popl %ecx - movl %ecx, efi32_config(%esi) /* Handle */ - popl %ecx - movl %ecx, efi32_config+8(%esi) /* EFI System table pointer */ - - leal efi32_config(%esi), %eax - pushl %eax - - call make_boot_params - cmpl $0, %eax - je fail - movl %esi, BP_code32_start(%eax) - popl %ecx - pushl %eax - pushl %ecx - jmp 2f /* Skip efi_config initialization */ -SYM_FUNC_END(efi_pe_entry) - SYM_FUNC_START(efi32_stub_entry) +SYM_FUNC_START_ALIAS(efi_stub_entry) add $0x4, %esp - popl %ecx - popl %edx - - call 1f -1: popl %esi - subl $1b, %esi - - movl %ecx, efi32_config(%esi) /* Handle */ - movl %edx, efi32_config+8(%esi) /* EFI System table pointer */ - - leal efi32_config(%esi), %eax - pushl %eax -2: call efi_main - cmpl $0, %eax movl %eax, %esi - jne 2f -fail: - /* EFI init failed, so hang. */ - hlt - jmp fail -2: movl BP_code32_start(%esi), %eax leal startup_32(%eax), %eax jmp *%eax SYM_FUNC_END(efi32_stub_entry) +SYM_FUNC_END_ALIAS(efi_stub_entry) #endif .text @@ -258,13 +211,6 @@ SYM_FUNC_START_LOCAL_NOALIGN(.Lrelocated) jmp *%eax SYM_FUNC_END(.Lrelocated) -#ifdef CONFIG_EFI_STUB - .data -efi32_config: - .fill 5,8,0 - .byte 0 -#endif - /* * Stack and heap for uncompression */ |