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| author | H. Peter Anvin <hpa@zytor.com> | 2010-06-26 20:38:04 -0700 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2010-06-26 20:38:04 -0700 |
| commit | 2d3c94d753dc27040c4ea93550429e231a205181 (patch) | |
| tree | 2605b873658abb5e826facbd4feed833797d79cf | |
| parent | 9057b5337c44c08343d403da2a31636dfc1ad741 (diff) | |
| download | syslinux-2d3c94d753dc27040c4ea93550429e231a205181.tar.gz | |
core: move PartInfo back to the top of stack
Move PartInfo back to near the top of the stack. This makes it less
likely that it ends up getting overwritten during the act of copying
itself.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| -rw-r--r-- | core/diskstart.inc | 17 |
1 files changed, 8 insertions, 9 deletions
diff --git a/core/diskstart.inc b/core/diskstart.inc index 7bb47dc6..bd819a9c 100644 --- a/core/diskstart.inc +++ b/core/diskstart.inc @@ -17,21 +17,20 @@ ; Common early-bootstrap code for harddisk-based Syslinux derivatives. ; - section .earlybss - alignb 16 -PartInfo: ; Partition table info -.mbr: resb 16 ; MBR partition info -.gptlen: resd 1 -.gpt: resb 56 ; GPT partition info (minus name) -FloppyTable resb 16 ; Floppy info table (must follow PartInfo) - section .init ; ; Some of the things that have to be saved very early are saved ; "close" to the initial stack pointer offset, in order to ; reduce the code size... ; -StackBuf equ STACK_TOP-44 ; Start the stack here (grow down - 4K) + +StackBuf equ STACK_TOP-44-92 ; Start the stack here (grow down - 4K) +PartInfo equ StackBuf +.mbr equ PartInfo +.gptlen equ PartInfo+16 +.gpt equ PartInfo+20 +FloppyTable equ PartInfo+76 +; Total size of PartInfo + FloppyTable == 76+16 = 92 bytes Hidden equ StackBuf-20 ; Partition offset OrigFDCTabPtr equ StackBuf-12 ; The 2nd high dword on the stack OrigESDI equ StackBuf-8 ; The high dword on the stack |