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The address of the callers stack can be inferred from the address of
'regs' - do the math in the dump function.
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Save/restore %ebp on irq entry.
Support saving and restoring %ebp on call16.
Enable display of %ebp in register dumps.
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Wait for the serial port to be ready after every debug function.
This fixes an issue with serial port detection.
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Add port names for serial port registers.
When detecting serial port, ignore top two bits of IIR register.
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Patch from Stefan Reinauer; modified by Kevin O'Connor.
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Change license of contributions from Kevin O'Connor from GPLv3 to
LGPLv3 (or later). Since the work as a whole is based on Kevin's
contributions and the "bochs bios" which has a license of LGPL (v2 or
later), this effectively makes the work as a whole available under
LGPLv3 (or later).
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Encode lineno and return code into one u32 parameter. This reduces
the number of functions arguments to 3 - which gcc does a better
job of scheduling.
Also, consistently place *regs parameter in the first arg.
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When CONFIG_DEBUG_LEVEL the debug message wont be shown, so don't
bother calling bvprintf.
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Minor code cleanups.
Fix parenthesis imbalance in keyboard led test.
The printf() call is only used in 32bit mode - make this explicit to
the compiler - it improves the code generation.
Clear the screen after initializing the vga option rom.
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Return the line number of the debug_fail() / debug_stub() call site on
each call.
Show the return status on set_code_fail() calls.
Also, the floppy_1305() code should not clear AL.
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Apparently, some VGA option roms will enable serial irqs - this could
cause problems with spurious irqs from debug messages.
Also, improve debugging of option roms that fail the checksum check.
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Regular serial writing code uses the system timer to timeout failed
writes - however, serial debugging can't rely on access to the BDA
segment or the hardware timer.
Therefore, implement a simple debug only serial writing function and
separate it from the regular serial output code.
Also include change to dump_regs - don't call __dprintf if debugging
not on.
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Rename BX_INFO() to dprintf() and add a "severity level" parameter.
Add CONFIG_DEBUG_LEVEL compile option to control debug verbosity.
Add more debug info to init steps of post.c.
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Enable by turning on CONFIG_DEBUG_SERIAL option.
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Several minor comment improvements.
Rearrange some definitions to make them more clear.
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Support boot menu during last stage of post.
Improve description of option roms.
Support printf of "%.s" to force printing strings on stack.
Enhance memcpy so that it also works in real-mode.
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Don't cast to a u8 - instead, cast the pointer to a u8*.
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Support '%p' format in bprintf.
Display pointer of register in debug output (useful for calculating
start stack).
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Remove some redundant code from Makefile.
Improve a couple of comments.
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The C code won't clobber these registers, so backing them up isn't needed.
Removing them saves a few bytes on the stack.
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Don't back up all registers on isr handlers - they don't read/modify
them. This saves stack space.
extended_bios_data_area_s must be packed to match ebda spec.
Enable irqs on int 08 - follows old bochs bios code.
Fix bug in int 76 -- should clear disk_interrupt_flag not
floppy_harddisk_info.
Make sure we alert in disk_ret on failure case.
int 18/19 entry points need to setup cld/%ds too.
asm in handle_1587 clobbers flags - note that in clobber list.
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Calling debug_exit at the end of a call doesn't help much - several of
the registers are already clobbered at this point. It also increases
stack usage because it prevents call tail optimization in many places.
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This at least allows the variable to be printed.
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Fix bug in post causing PIC2 to not be initialized properly.
Only run ata_detect if CONFIG_ATA enabled.
Improve debugging aids - introduce debug_isr(); move DEBUGF to each file.
Enable mouse by default.
Fix bug in floppy causing extra test of PORT_FD_STATUS on recalibrate.
Always disable/enable kbd in handle_09 event.
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Support '%c'.
Fix bug causing junk to be printed on unrecognized % code.
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Route BX_INFO to debug port.
Add a new debug_stub() function.
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