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100 Commits (9b01a9fd9cb149a1cee0d16e59e050131aefdabf)

Author SHA1 Message Date
Michael Brown 0015601f0b [gdb] Fix a compiler warning that shows up only when assertions are enabled 
gcc should (I think) be warning about this anyway, but seems to do so
only when assertions are enabled for this object.
 2008-09-29 01:00:14 +01:00
Michael Brown e3c5507178 [i386] Add dump_regs() debug call 
Use as "call dump_regs" from any real-mode code within .text16.
Should preserve all registers and flags.
 2008-09-28 23:06:53 +01:00
Michael Brown ca0b0f0616 [relocate] Guard against systems that report empty memory regions 
If the INT 15,e820 memory map reports a region [0,0), this confuses
the "truncate to even megabytes" logic, which ends up rounding the
region 'down' to [0,fff00000).

Fix by ensuring that the region's end address is at least 1, before we
subtract 1 to obtain the "last byte in region" address.
 2008-09-23 01:13:28 +01:00
Michael Brown 320b072c7a [pcbios] Support arbitrary splits of the e820 memory map 
Allow for an arbitrary number of splits of the system memory map via
INT 15,e820.

Features of the new map-mangling algorithm include:

  Supports random access to e820 map entries.

  Requires only sequential access support from the underlying e820
  map, even if our caller uses random access.

  Empty regions will always be stripped.

  Always terminates with %ebx=0, even if the underlying map terminates
  with CF=1.

  Allows for an arbitrary number of hidden regions, with underlying
  regions split into as many subregions as necessary.

Total size increase to achieve this is 193 bytes.
 2008-08-18 07:17:41 +01:00
Stefan Hajnoczi fe79edfc3d [GDB] Remove unused DR6 debug register variable 2008-06-30 19:19:48 +01:00
Stefan Hajnoczi 3715c8c721 [GDB] Zero-extend 16-bit segment registers 
When the 16-bit segment registers are accessed using 32-bit instructions
the high order bytes are undefined on older CPUs.  We now explicitly
zero the high order bytes when snapshotting the CPU state.  This ensures
that the GDB stub reports consistent values for the segment registers.
 2008-06-30 19:19:48 +01:00
Stefan Hajnoczi 5504fa9047 [GDB] Add copyright header for gdbmach.c 2008-06-30 19:19:48 +01:00
Stefan Hajnoczi 19386ec2c8 [GDB] Add watch and rwatch hardware watchpoints 2008-06-30 19:19:48 +01:00
Stefan Hajnoczi 04bc50f025 [GDB] Add GDB stub for remote debugging 
See http://etherboot.org/wiki/dev/gdbstub for documentation.
 2008-06-05 00:45:50 +01:00
Stefan Hajnoczi 842165ef76 [GDBSYM] Remove unused gdbsym.c 
The GDBSYM config.h option was an attempt at QEMU GDB debugging.  I have
removed the code since it is unused and may confuse people wanting to
use the GDB stub.
 2008-06-05 00:45:32 +01:00
Alexey Zaytsev 4006d229e5 Introduce the new timer subsystem. 
Timer subsystem initialization code in core/timer.c

	Split the BIOS and RTDSC timer drivers from i386_timer.c

	Split arch/i386/firmware/pcbios/bios.c into the RTSDC
	timer driver and arch/i386/core/nap.c

	Split the headers properly:
		include/unistd.h - delay functions to be used by the
					gPXE core and drivers.

		include/gpxe/timer.h - the fimer subsystem interface
					to be used by the timer drivers
					and currticks() to be used by
					the code gPXE subsystems.

		include/latch.h	- removed
		include/timer.h - scheduled for removal. Some driver
					are using currticks, which is
					only for core subsystems.

Signed-off-by: Alexey Zaytsev <alexey.zaytsev@gmail.com>
 2008-03-02 03:15:07 +03:00
Holger Lubitz 7815474495 Revert "malloc attribute changes" 
wasn't meant for my local "master" branch ;)
This reverts commit 373022108b.
 2007-08-06 03:36:35 +02:00
Holger Lubitz 373022108b malloc attribute changes 2007-08-02 22:42:45 +02:00
Michael Brown 4ce8d61a5c Import various libgcc functions from syslinux. 
Experimentation reveals that gcc ignores -mrtd for the implicit
arithmetic functions (e.g. __udivdi3), but not for the implicit
memcpy() and memset() functions.  Mark the implicit arithmetic
functions with __attribute__((cdecl)) to compensate for this.

(Note: we cannot mark with with __cdecl, because we define __cdecl to
incorporate regparm(0) as well.)
 2007-07-30 02:43:43 +01:00
Michael Brown f62d6486d8 GCC's optimiser seems to screw up if this is left static... 2007-07-30 02:42:32 +01:00
Michael Brown a6a1052096 Applied a modified version of holger's regparm patches. 2007-07-29 00:17:25 +01:00
Michael Brown dc52db4920 Removed dead code identified by symcheck 2007-07-17 01:43:19 +01:00
Michael Brown 6d2e4e719c Move uninitialised .data16 variables to .bss16; saves around 2000 
bytes of useless zeroes in the final image.
 2007-07-16 13:22:12 +01:00
Michael Brown adf192f566 Shrink cpu.c and render it useful for our purposes. 2007-07-14 19:12:13 +01:00
Michael Brown e330db3c74 Dead code removal. 
Kill off use of etherboot.h outside drivers/net.
 2007-07-14 15:42:26 +01:00
Michael Brown 4e14b020a5 Master IRQ should be EOIed first, I think. 2007-07-10 04:33:59 +01:00
Michael Brown fbda4837b0 Allocate heap at first usage, rather than assuming we can fit it in 
below _text.  This should help with the gPXE-on-gPXE-via-PXE case.
 2007-07-05 22:30:34 +01:00
Michael Brown 89349d7fad Separated out initialisation functions from startup/shutdown functions. 2007-07-03 23:09:56 +01:00
Michael Brown cbd4542dc0 Merge branch 'master' of rom.etherboot.org:/pub/scm/gpxe 2007-07-03 21:09:26 +01:00
Marty Connor 9b3c4e4d79 Warnings purge: src/arch/i386, src/core/disk.c, ramdisk, autoboot 2007-07-03 16:02:15 -04:00
Michael Brown fae10a7ca1 We don't actually use the reset functions anywhere, and nothing really 
provides them.
 2007-07-03 20:34:51 +01:00
Michael Brown e42eba4af4 Use a common base-memory packet buffer for DHCP construction (as used 
by PXE and NBI) and UNDI packets (as used by undinet and UNDI).
 2007-07-02 18:33:41 +01:00
Michael Brown d5451d210c Add ability to resolve relative symbols as well as locate absolute ones. 2007-06-30 22:59:15 +01:00
Michael Brown 8f6a4e8140 Add gdbsym.c object to help with running gdb-to-qemu 2007-06-30 22:43:31 +01:00
Michael Brown 045fb24557 Use internal real-mode stack from non-returnable prefixes 2007-06-28 21:56:14 +01:00
Michael Brown ff7d0af585 Provide a buffer in base memory for code to fill with generated DHCP data. 2007-03-22 16:18:07 +00:00
Michael Brown f06059ab97 More assertions 2007-02-01 02:18:22 +00:00
Michael Brown c650c8c84a Also print out stack pointer (with optional stack dump) 2007-02-01 02:17:59 +00:00
Michael Brown 406b20a64d Assert that division result is correct 2007-01-31 23:58:52 +00:00
Michael Brown c789e8640b Added __umoddi3 2007-01-31 22:26:14 +00:00
Michael Brown b3b6b25aeb Handle (64-bit) / (32-bit) = (64-bit), i.e. one step beyond that 
provided by the divl instruction.
 2007-01-28 19:34:17 +00:00
Michael Brown 73b09ecba6 Use stdio.h instead of vsprintf.h 2007-01-19 01:13:12 +00:00
Michael Brown bd95927386 Accelerate memcpy() by around 32% on large, dword-aligned copies. 2007-01-18 15:18:02 +00:00
Michael Brown 544fa25928 Rename e{malloc,realloc,free} to u{malloc,realloc,free}, to more obviously 
reflect the fact that they allocate and deallocate user memory (i.e.
things reached through a userptr_t).
 2007-01-16 08:36:42 +00:00
Michael Brown 77d280968a Obsoleted by arch/i386/image/multiboot.c 2007-01-14 11:45:28 +00:00
Michael Brown 644f3674e6 Obsolete for some time 2007-01-14 02:24:41 +00:00
Michael Brown ece4ff929e Use _text, rather than assuming _text==0. 2007-01-14 00:03:07 +00:00
Michael Brown 77b7640af4 Fix the only bug (which was to use DBGC() in place of DBG()!) and add 4kB 
alignment.
 2007-01-12 03:28:03 +00:00
Michael Brown 45ec9c907e First version of an external memory allocator (not tested) 2007-01-12 03:15:29 +00:00
Michael Brown 39a8ed827c Long since obsoleted by arch/i386/scripts/i386.lds 2007-01-12 02:43:10 +00:00
Michael Brown 2e088d9afc Obsoleted by arch/i386/interface/pxe/pxe_call.c 2007-01-12 02:42:14 +00:00
Michael Brown 7ad1c2eaa8 Removed the Etherboot-specific ELF-image code and replaced it with a 
generic ELF loader, to be used by the multiboot code.
 2007-01-11 14:44:03 +00:00
Michael Brown c980cdd0aa Move memmap.h out of arch/i386; it no longer contains anything 
architecture-dependent and is needed by the ELF code.
 2007-01-11 14:08:44 +00:00
Michael Brown e2dcd05b67 Update buffer-handling code to enable expandable buffers. 2007-01-11 03:50:47 +00:00
Michael Brown fdc97499bf Add device description fields to struct device. 2007-01-10 15:27:48 +00:00