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x86, tools: Consolidate #ifdef code

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Instead of littering main() with #ifdef CONFIG_EFI_STUB, move the logic
into separate functions that do nothing if the config option isn't set.
This makes main() much easier to read.

Acked-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
This commit is contained in:
Matt Fleming 2013-08-01 14:18:49 +01:00
parent 86134a1b39
commit 993c30a04e
1 changed files with 42 additions and 22 deletions
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64
arch/x86/boot/tools/build.c
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@ -219,6 +219,45 @@ static void update_pecoff_text(unsigned int text_start, unsigned int file_sz)
update_pecoff_section_header(".text", text_start, text_sz);
}
static int reserve_pecoff_reloc_section(int c)
{
/* Reserve 0x20 bytes for .reloc section */
memset(buf+c, 0, PECOFF_RELOC_RESERVE);
return PECOFF_RELOC_RESERVE;
}
static void efi_stub_defaults(void)
{
/* Defaults for old kernel */
#ifdef CONFIG_X86_32
efi_pe_entry = 0x10;
efi_stub_entry = 0x30;
#else
efi_pe_entry = 0x210;
efi_stub_entry = 0x230;
startup_64 = 0x200;
#endif
}
static void efi_stub_entry_update(void)
{
#ifdef CONFIG_X86_64 /* Yes, this is really how we defined it :( */
efi_stub_entry -= 0x200;
#endif
put_unaligned_le32(efi_stub_entry, &buf[0x264]);
}
#else
static inline void update_pecoff_setup_and_reloc(unsigned int) {}
static inline void update_pecoff_text(unsigned int, unsigned int) {}
static inline void efi_stub_defaults(void) {}
static inline void efi_stup_entry_update(void) {}
static inline int reserve_pecoff_reloc_section(int c)
{
return 0;
}
#endif /* CONFIG_EFI_STUB */
@ -271,15 +310,7 @@ int main(int argc, char ** argv)
void *kernel;
u32 crc = 0xffffffffUL;
/* Defaults for old kernel */
#ifdef CONFIG_X86_32
efi_pe_entry = 0x10;
efi_stub_entry = 0x30;
#else
efi_pe_entry = 0x210;
efi_stub_entry = 0x230;
startup_64 = 0x200;
#endif
efi_stub_defaults();
if (argc != 5)
usage();
@ -302,11 +333,7 @@ int main(int argc, char ** argv)
die("Boot block hasn't got boot flag (0xAA55)");
fclose(file);
#ifdef CONFIG_EFI_STUB
/* Reserve 0x20 bytes for .reloc section */
memset(buf+c, 0, PECOFF_RELOC_RESERVE);
c += PECOFF_RELOC_RESERVE;
#endif
c += reserve_pecoff_reloc_section(c);
/* Pad unused space with zeros */
setup_sectors = (c + 511) / 512;
@ -315,9 +342,7 @@ int main(int argc, char ** argv)
i = setup_sectors*512;
memset(buf+c, 0, i-c);
#ifdef CONFIG_EFI_STUB
update_pecoff_setup_and_reloc(i);
#endif
/* Set the default root device */
put_unaligned_le16(DEFAULT_ROOT_DEV, &buf[508]);
@ -342,14 +367,9 @@ int main(int argc, char ** argv)
buf[0x1f1] = setup_sectors-1;
put_unaligned_le32(sys_size, &buf[0x1f4]);
#ifdef CONFIG_EFI_STUB
update_pecoff_text(setup_sectors * 512, sz + i + ((sys_size * 16) - sz));
#ifdef CONFIG_X86_64 /* Yes, this is really how we defined it :( */
efi_stub_entry -= 0x200;
#endif
put_unaligned_le32(efi_stub_entry, &buf[0x264]);
#endif
efi_stub_entry_update();
crc = partial_crc32(buf, i, crc);
if (fwrite(buf, 1, i, dest) != i)