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| author | Michael Brown | 2007-06-28 22:50:36 +0200 |
|---|---|---|
| committer | Michael Brown | 2007-06-28 22:50:36 +0200 |
| commit | 00473f09520c762bb89b3a695109cd7b57406c7e (patch) | |
| tree | 4062d1ce1229adca1576954283c9ec59cd4bfac9 /src | |
| parent | Set current working URI based on TFTP server specified by DHCP. (diff) | |
| download | ipxe-00473f09520c762bb89b3a695109cd7b57406c7e.tar.gz ipxe-00473f09520c762bb89b3a695109cd7b57406c7e.tar.xz ipxe-00473f09520c762bb89b3a695109cd7b57406c7e.zip | |
Revert "Move stack to below 0x7c00; leaving it at the default location"
This reverts commit 03ca71c38da9cc6df01ecd9ef16e97a0edb6a4e9.
Diffstat (limited to 'src')
| -rw-r--r-- | src/arch/i386/prefix/dskprefix.S | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/src/arch/i386/prefix/dskprefix.S b/src/arch/i386/prefix/dskprefix.S index 2df00aed8..9b1ebaaf5 100644 --- a/src/arch/i386/prefix/dskprefix.S +++ b/src/arch/i386/prefix/dskprefix.S @@ -31,10 +31,6 @@ jmp $BOOTSEG, $go /* reload cs:ip to match relocation addr */ go: - xorw %ax,%ax /* put stack at 0000:7c00 */ - movw %ax,%ss - movw $0x7c00,%sp - movw $0x2000-12, %di /* 0x2000 is arbitrary value >= length */ /* of bootsect + room for stack + 12 for */ /* saved disk parm block */ @@ -42,6 +38,8 @@ go: movw $BOOTSEG, %ax movw %ax,%ds movw %ax,%es + movw %ax,%ss /* put stack at BOOTSEG:0x4000-12. */ + movw %di,%sp /* Many BIOS's default disk parameter tables will not recognize multi-sector * reads beyond the maximum sector number specified in the default diskette @@ -52,7 +50,7 @@ go: * will set the maximum sector count to 36 - the most we will encounter on an * ED 2.88. High doesn't hurt. Low does. * - * Segments are as follows: ds=es=cs - BOOTSEG + * Segments are as follows: ds=es=ss=cs - BOOTSEG */ xorw %cx,%cx |