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| author | H. Peter Anvin <hpa@zytor.com> | 2009-05-13 18:35:35 -0700 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2009-05-13 18:35:35 -0700 |
| commit | 577e49042d7266a9676244b4a89caf3bda184e7d (patch) | |
| tree | b7a18bf9fcf486728ddae3809e89803021b7bd9a /core/isolinux.asm | |
| parent | 8d08421d2bd72fe1ca4532405e4282461eb68f30 (diff) | |
| download | syslinux-577e49042d7266a9676244b4a89caf3bda184e7d.tar.gz | |
core: move initial code to a new .init segment; unify .bss+.bss1
Move code used before loading is complete to a new .init segment;
.text is now only the stuff that is used at any time. Move the .bss1
segment down to where .bss and .bss2 already are; it seems to fit
better there now.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'core/isolinux.asm')
| -rw-r--r-- | core/isolinux.asm | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/core/isolinux.asm b/core/isolinux.asm index 8481b4b8..4cb4cb86 100644 --- a/core/isolinux.asm +++ b/core/isolinux.asm @@ -200,7 +200,7 @@ _spec_len equ _spec_end - _spec_start alignb open_file_t_size Files resb MAX_OPEN*open_file_t_size - section .text + section .init ;; ;; Primary entry point. Because BIOSes are buggy, we only load the first ;; CD-ROM sector (2K) of the file, so the number one priority is actually @@ -693,9 +693,7 @@ writemsg: push ax ; writechr: - jmp near writechr_simple ; 3-byte jump - -writechr_simple: +.simple: pushfd pushad mov ah,0Eh @@ -1079,6 +1077,7 @@ rl_checkpt equ $ ; Must be <= 800h ; ---------------------------------------------------------------------------- ; End of code and data that have to be in the first sector ; ---------------------------------------------------------------------------- + section .text all_read: @@ -1093,7 +1092,12 @@ all_read: %include "cpuinit.inc" ; Patch the writechr routine to point to the full code - mov word [writechr+1], writechr_full-(writechr+3) + mov di,writechr + mov al,0e9h + stosb + mov ax,writechr_full-3 + sub ax,bx + stosw ; Tell the user we got this far... %ifndef DEBUG_MESSAGES ; Gets messy with debugging on |