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[x86_64] Add support for compilation as an x86_64 binary

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Currently the only supported platform for x86_64 is EFI.

Building an EFI64 gPXE requires a version of gcc that supports
__attribute__((ms_abi)).  This currently means a development build of
gcc; the feature should be present when gcc 4.4 is released.

In the meantime; you can grab a suitable gcc tree from

  git://git.etherboot.org/scm/people/mcb30/gcc/.git
This commit is contained in:
Michael Brown
2008-11-18 14:30:37 -08:00
parent b0d2c9a4d5
commit ce0a0ccf5c
34 changed files with 997 additions and 51 deletions
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12
src/util/efilink.c
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@@ -56,6 +56,9 @@ static void generate_pe_reloc ( struct pe_relocs **pe_reltab,
start_rva = ( rva & ~0xfff );
reloc = ( rva & 0xfff );
switch ( size ) {
case 8:
reloc |= 0xa000;
break;
case 4:
reloc |= 0x3000;
break;
@@ -385,13 +388,18 @@ static void process_reloc ( asection *section, arelent *rel,
/* Skip absolute symbols; the symbol value won't
* change when the object is loaded.
*/
} else if ( strcmp ( howto->name, "R_386_32" ) == 0 ) {
} else if ( strcmp ( howto->name, "R_X86_64_64" ) == 0 ) {
/* Generate an 8-byte PE relocation */
generate_pe_reloc ( pe_reltab, offset, 8 );
} else if ( ( strcmp ( howto->name, "R_386_32" ) == 0 ) ||
( strcmp ( howto->name, "R_X86_64_32" ) == 0 ) ) {
/* Generate a 4-byte PE relocation */
generate_pe_reloc ( pe_reltab, offset, 4 );
} else if ( strcmp ( howto->name, "R_386_16" ) == 0 ) {
/* Generate a 2-byte PE relocation */
generate_pe_reloc ( pe_reltab, offset, 2 );
} else if ( strcmp ( howto->name, "R_386_PC32" ) == 0 ) {
} else if ( ( strcmp ( howto->name, "R_386_PC32" ) == 0 ) ||
( strcmp ( howto->name, "R_X86_64_PC32" ) == 0 ) ) {
/* Skip PC-relative relocations; all relative offsets
* remain unaltered when the object is loaded.
*/