102 lines
2.3 KiB
Diff
102 lines
2.3 KiB
Diff
---
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core/isolinux.asm | 33 +++++++++++++++++++++++++++++++++
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core/layout.inc | 7 +++++++
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core/parsecmd.inc | 8 ++++++++
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3 files changed, 48 insertions(+)
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--- a/core/isolinux.asm
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+++ b/core/isolinux.asm
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@@ -20,6 +20,9 @@
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; ****************************************************************************
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%define IS_ISOLINUX 1
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+
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+; %define DEBUG_DISKIO
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+
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%include "head.inc"
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;
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@@ -964,10 +967,40 @@ getlinsec_cdrom:
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; INT 13h with retry
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xint13: mov byte [RetryCount],retry_count
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.try: pushad
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+%ifdef DEBUG_DISKIO
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+ pushad
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+ mov cx,16
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+.zap:
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+ lodsb
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+ call writehex2
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+ mov al,' '
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+ call writechr
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+ loop .zap
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+ mov ah,0
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+ int 16h
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+ popad
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+%endif
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; seen buggy bios that overwrites buffer address on error...
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push dword [dapa + 4]
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call int13
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pop dword [dapa + 4]
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+%ifdef DEBUG_DISKIO
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+ pushad
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+ pushf
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+ push ax
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+ mov al,':'
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+ call writechr
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+ mov al,' '
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+ call writechr
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+ pop ax
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+ sbb al,al
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+ call writehex4
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+ call crlf
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+ mov ah,0
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+ int 16h
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+ popf
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+ popad
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+%endif
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jc .error
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.noerror:
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add sp,byte 8*4 ; Clean up stack
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--- a/core/layout.inc
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+++ b/core/layout.inc
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@@ -56,6 +56,11 @@ RBFG_brainfuck: resb 2048 ; Bigger than
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section .bss2 write nobits align=16
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+%ifdef IS_ISOLINUX
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+ ; Normal bss...
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+ section .bss1 write nobits align=16
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+%endif
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+
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section .text exec write progbits align=16
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section .bcopyxx exec write progbits align=16
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section .data write progbits align=16
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@@ -68,8 +73,10 @@ RBFG_brainfuck: resb 2048 ; Bigger than
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; the spillover from the last fractional sector load.
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section .uibss write nobits align=16
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+%ifndef IS_ISOLINUX
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; Normal bss...
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section .bss1 write nobits align=16
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+%endif
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; Symbols from linker script
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%macro SECINFO 1
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--- a/core/parsecmd.inc
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+++ b/core/parsecmd.inc
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@@ -121,6 +121,14 @@ KbdMap resb 256 ; Keyboard map
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FKeyName resb MAX_FKEYS*FILENAME_MAX ; File names for F-key help
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KernelCNameLen resw 1 ; Length of unmangled kernel name
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InitRDCNameLen resw 1 ; Length of unmangled initrd name
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+
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+%if IS_ISOLINUX
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+%ifdef DEBUG_MESSAGES
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+; we need to rearrange memory a bit to make isolinux-debug.bin fit
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+ section .bss
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+%endif
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+%endif
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+
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%if IS_SYSLINUX
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KernelName resb FILENAME_MAX+1 ; Mangled name for kernel
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KernelCName resb FILENAME_MAX+2 ; Unmangled kernel name
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