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| author | H. Peter Anvin <hpa@zytor.com> | 2008-02-25 14:55:45 -0800 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2008-02-25 14:55:45 -0800 |
| commit | 65b3053a5e868708e5a746b3e120902d71a45d4b (patch) | |
| tree | 9713825315a5d662b9b3dfd72021e699de37be36 /mbr | |
| parent | 35807ac60f87416d0a82341860f37071ebdd2577 (diff) | |
| download | syslinux-65b3053a5e868708e5a746b3e120902d71a45d4b.tar.gz | |
gptmbr: shuffle slightly to reduce register pressure
Shuffle some code slightly to reduce register pressure; no size change
but this might make the code easier to follow and/or change.
Diffstat (limited to 'mbr')
| -rw-r--r-- | mbr/gptmbr.S | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/mbr/gptmbr.S b/mbr/gptmbr.S index 138ac51e..80b26ed0 100644 --- a/mbr/gptmbr.S +++ b/mbr/gptmbr.S @@ -178,8 +178,6 @@ found_part: stosl movl 40(%si),%eax movl 48(%si),%edx - pushl %eax - pushl %edx call saturate_stosl /* Partition start */ subl 32(%si),%eax @@ -188,16 +186,15 @@ found_part: call saturate_stosl /* Partition length */ rep; movsb /* GPT entry follows MBR entry */ - popl %edx - popl %eax popw %si /* * boot: invoke the actual bootstrap. %ds:%si points to the - * partition information in memory, and %edx:%eax to the boot sector - * on disk. + * partition information in memory. */ boot: + movl (40+16)(%si),%eax + movl (48+16)(%si),%edx call read_sector cmpw $0xaa55, (bootsec+510) jne missing_os /* Not a valid boot sector */ |