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[build] Keep gcc 4.4 happy

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gcc 4.4 adds another few warnings, and also seems to complain if we
place %ebp in the clobber list for any inline asm.
This commit is contained in:
Michael Brown
2008-11-18 01:52:40 +00:00
parent 464bf35cc0
commit 54fbd11221
5 changed files with 49 additions and 30 deletions
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14
src/arch/i386/firmware/pcbios/memmap.c
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@@ -158,7 +158,7 @@ static int meme820 ( struct memory_map *memmap ) {
uint32_t smap;
size_t size;
unsigned int flags;
unsigned int discard_d, discard_D;
unsigned int discard_D;
/* Clear the E820 buffer. Do this once before starting,
* rather than on each call; some BIOSes rely on the contents
@@ -171,13 +171,15 @@ static int meme820 ( struct memory_map *memmap ) {
* this by telling gcc that all non-output registers
* may be corrupted.
*/
__asm__ __volatile__ ( REAL_CODE ( "stc\n\t"
__asm__ __volatile__ ( REAL_CODE ( "pushl %%ebp\n\t"
"stc\n\t"
"int $0x15\n\t"
"pushfw\n\t"
"popw %w0\n\t" )
: "=r" ( flags ), "=a" ( smap ),
"=b" ( next ), "=D" ( discard_D ),
"=c" ( size ), "=d" ( discard_d )
"popw %%dx\n\t"
"popl %%ebp\n\t" )
: "=a" ( smap ), "=b" ( next ),
"=c" ( size ), "=d" ( flags ),
"=D" ( discard_D )
: "a" ( 0xe820 ), "b" ( next ),
"D" ( __from_data16 ( &e820buf ) ),
"c" ( sizeof ( e820buf ) ),

6
src/arch/i386/image/multiboot.c
View File

@@ -282,11 +282,13 @@ static int multiboot_exec ( struct image *image ) {
/* Jump to OS with flat physical addressing */
DBGC ( image, "MULTIBOOT %p starting execution at %lx\n",
image, entry );
__asm__ __volatile__ ( PHYS_CODE ( "call *%%edi\n\t" )
__asm__ __volatile__ ( PHYS_CODE ( "pushl %%ebp\n\t"
"call *%%edi\n\t"
"popl %%ebp\n\t" )
: : "a" ( MULTIBOOT_BOOTLOADER_MAGIC ),
"b" ( virt_to_phys ( &mbinfo ) ),
"D" ( entry )
: "ecx", "edx", "esi", "ebp", "memory" );
: "ecx", "edx", "esi", "memory" );
DBGC ( image, "MULTIBOOT %p returned\n", image );