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| author | H. Peter Anvin <hpa@zytor.com> | 2010-02-21 15:42:03 -0800 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2010-02-21 15:42:03 -0800 |
| commit | ced4ec389bd2d915f3e00e41736737279fba89ec (patch) | |
| tree | c8d297c43ade26a3d60ca4bb16d6b0abd0f5d974 /core/layout.inc | |
| parent | 8f652f110068ed20dd84bdc46233d803bc4150be (diff) | |
| download | syslinux-ced4ec389bd2d915f3e00e41736737279fba89ec.tar.gz | |
core: let xfer_buf_seg, real_mode_seg be assigned by the linker
Use the linker to assign xfer_bug_seg and real_mode_seg.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'core/layout.inc')
| -rw-r--r-- | core/layout.inc | 25 |
1 files changed, 17 insertions, 8 deletions
diff --git a/core/layout.inc b/core/layout.inc index baf45b92..b769832f 100644 --- a/core/layout.inc +++ b/core/layout.inc @@ -115,13 +115,6 @@ RBFG_brainfuck: resb 2048 ; Bigger than an Ethernet packet... ; Keep the low-memory footprint as small as possible... overrun is a hard ; failure! ; -; 0000h - main code/data segment (and BIOS segment) -; -; This stuff really should come from the linker... -; - global xfer_buf_seg, core_xfer_buf -xfer_buf_seg equ 2000h -core_xfer_buf equ xfer_buf_seg << 4 serial_buf_size equ 4096 ; Should be a power of 2 @@ -141,8 +134,24 @@ serial_buf_size equ 4096 ; Should be a power of 2 auxseg resb aux_size ; +; Transfer buffer segment: guaranteed to be aligned 64K, used for disk I/O +; One symbol for the segment number, one for the absolute address +; + extern xfer_buf_seg + section .xfer_buf write nobits align=65536 + global core_xfer_buf +core_xfer_buf resb 65536 + +; ; Segment for the real mode code (needed as long as we have a in-kernel ; loader and/or COM16 support. +; One symbol for the segment number, one for the absolute address ; -real_mode_seg equ xfer_buf_seg + 1000h + extern real_mode_seg + section .real_mode write nobits align=65536 + global core_real_mode +core_real_mode resb 65536 + comboot_seg equ real_mode_seg ; COMBOOT image loading zone + + section .text16 |