Add a simple tool that prints out a register offset table to map
from the gdb(1) register number to offsets within struct reg and struct fpreg. The tool is useful only on selected platforms. On ia64 the registers are all over the place to simplify handling of them in various situations, but which makes creating or maintaining such an offset table error prone to do by hand. Since remote kernel debugging operates on the same register numbers, it would be a natural choice to use an identical offset table in the kernel. However, since the kernel does not operate on struct reg nor struct fpreg in the remote gdb(1) case, such would not make sense. Whether we want to use this tool to create offsets for use in the kernel or duplicate the knowledge of which register number maps to what register is something that will become clear soon. Note: in order to build cross debuggers, one cannot use target headers and/or target definitions. That's why offsets need to be hardcoded in the first place. Unpleasant, but necessary.
This commit is contained in:
Marcel Moolenaar
parent
56dc72c3b6
commit
1d559da4d1
@ -19,6 +19,10 @@ diffburst OBSOLETE: equivalent functionality is available via split -p.
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editing Editor modes and the like to help editing FreeBSD code.
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epfe Extract printing filter examples from printing.sgml.
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find-sb Scan a disk for possible filesystem superblocks.
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gdb_regofs A simple tool that prints out a register offset table
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for mapping gdb(1) register numbers to struct reg and
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struct fpreg offsets. The tool is useful on selected
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platforms only.
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hcomp Compress header files by removing comments and whitespace.
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html-mv Rename HTML generated filenames to human readable filenames.
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ifinfo Uses the interface MIB to print out all the information
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5
tools/tools/gdb_regofs/Makefile
Normal file
5
tools/tools/gdb_regofs/Makefile
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@ -0,0 +1,5 @@
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# $FreeBSD$
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PROG=gdb_regofs
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SRCS=${MACHINE_ARCH}.c
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NOMAN=yes
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.include <bsd.prog.mk>
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213
tools/tools/gdb_regofs/ia64.c
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213
tools/tools/gdb_regofs/ia64.c
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@ -0,0 +1,213 @@
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/*
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* Copyright (c) 2004 Marcel Moolenaar
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <stddef.h>
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#include <machine/reg.h>
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#define PRESERVED(x) offsetof(struct reg, r_preserved) \
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+ offsetof(struct _callee_saved, x)
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#define SCRATCH(x) offsetof(struct reg, r_scratch) \
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+ offsetof(struct _caller_saved, x)
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#define SPECIAL(x) offsetof(struct reg, r_special) \
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+ offsetof(struct _special, x)
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#define HIGH_FP(x) offsetof(struct fpreg, fpr_high) \
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+ offsetof(struct _high_fp, x)
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#define PRESERVED_FP(x) offsetof(struct fpreg, fpr_preserved) \
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+ offsetof(struct _callee_saved_fp, x)
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#define SCRATCH_FP(x) offsetof(struct fpreg, fpr_scratch) \
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+ offsetof(struct _caller_saved_fp, x)
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static int regofs[] = {
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/*
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* General registers (0-127)
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*/
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-1, /* gr0 */
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SPECIAL(gp),
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SCRATCH(gr2), SCRATCH(gr3),
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PRESERVED(gr4), PRESERVED(gr5), PRESERVED(gr6), PRESERVED(gr7),
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SCRATCH(gr8), SCRATCH(gr9), SCRATCH(gr10), SCRATCH(gr11),
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SPECIAL(sp), SPECIAL(tp),
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SCRATCH(gr14), SCRATCH(gr15), SCRATCH(gr16), SCRATCH(gr17),
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SCRATCH(gr18), SCRATCH(gr19), SCRATCH(gr20), SCRATCH(gr21),
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SCRATCH(gr22), SCRATCH(gr23), SCRATCH(gr24), SCRATCH(gr25),
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SCRATCH(gr26), SCRATCH(gr27), SCRATCH(gr28), SCRATCH(gr29),
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SCRATCH(gr30), SCRATCH(gr31),
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/*
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* gr32 through gr127 are not directly available as they are
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* stacked registers.
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*/
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-1, -1, -1, -1, -1, -1, -1, -1, /* gr32-gr39 */
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-1, -1, -1, -1, -1, -1, -1, -1, /* gr40-gr47 */
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-1, -1, -1, -1, -1, -1, -1, -1, /* gr48-gr55 */
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-1, -1, -1, -1, -1, -1, -1, -1, /* gr56-gr63 */
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-1, -1, -1, -1, -1, -1, -1, -1, /* gr64-gr71 */
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-1, -1, -1, -1, -1, -1, -1, -1, /* gr72-gr79 */
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-1, -1, -1, -1, -1, -1, -1, -1, /* gr80-gr87 */
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-1, -1, -1, -1, -1, -1, -1, -1, /* gr88-gr95 */
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-1, -1, -1, -1, -1, -1, -1, -1, /* gr96-gr103 */
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-1, -1, -1, -1, -1, -1, -1, -1, /* gr104-gr111 */
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-1, -1, -1, -1, -1, -1, -1, -1, /* gr112-gr119 */
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-1, -1, -1, -1, -1, -1, -1, -1, /* gr120-gr127 */
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/*
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* Floating-point registers (128-255)
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*/
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-1, /* fr0: constant 0.0 */
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-1, /* fr1: constant 1.0 */
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PRESERVED_FP(fr2), PRESERVED_FP(fr3),
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PRESERVED_FP(fr4), PRESERVED_FP(fr5),
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SCRATCH_FP(fr6), SCRATCH_FP(fr7),
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SCRATCH_FP(fr8), SCRATCH_FP(fr9),
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SCRATCH_FP(fr10), SCRATCH_FP(fr11),
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SCRATCH_FP(fr12), SCRATCH_FP(fr13),
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SCRATCH_FP(fr14), SCRATCH_FP(fr15),
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PRESERVED_FP(fr16), PRESERVED_FP(fr17),
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PRESERVED_FP(fr18), PRESERVED_FP(fr19),
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PRESERVED_FP(fr20), PRESERVED_FP(fr21),
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PRESERVED_FP(fr22), PRESERVED_FP(fr23),
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PRESERVED_FP(fr24), PRESERVED_FP(fr25),
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PRESERVED_FP(fr26), PRESERVED_FP(fr27),
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PRESERVED_FP(fr28), PRESERVED_FP(fr29),
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PRESERVED_FP(fr30), PRESERVED_FP(fr31),
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HIGH_FP(fr32), HIGH_FP(fr33), HIGH_FP(fr34), HIGH_FP(fr35),
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HIGH_FP(fr36), HIGH_FP(fr37), HIGH_FP(fr38), HIGH_FP(fr39),
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HIGH_FP(fr40), HIGH_FP(fr41), HIGH_FP(fr42), HIGH_FP(fr43),
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HIGH_FP(fr44), HIGH_FP(fr45), HIGH_FP(fr46), HIGH_FP(fr47),
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HIGH_FP(fr48), HIGH_FP(fr49), HIGH_FP(fr50), HIGH_FP(fr51),
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HIGH_FP(fr52), HIGH_FP(fr53), HIGH_FP(fr54), HIGH_FP(fr55),
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HIGH_FP(fr56), HIGH_FP(fr57), HIGH_FP(fr58), HIGH_FP(fr59),
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HIGH_FP(fr60), HIGH_FP(fr61), HIGH_FP(fr62), HIGH_FP(fr63),
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HIGH_FP(fr64), HIGH_FP(fr65), HIGH_FP(fr66), HIGH_FP(fr67),
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HIGH_FP(fr68), HIGH_FP(fr69), HIGH_FP(fr70), HIGH_FP(fr71),
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HIGH_FP(fr72), HIGH_FP(fr73), HIGH_FP(fr74), HIGH_FP(fr75),
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HIGH_FP(fr76), HIGH_FP(fr77), HIGH_FP(fr78), HIGH_FP(fr79),
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HIGH_FP(fr80), HIGH_FP(fr81), HIGH_FP(fr82), HIGH_FP(fr83),
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HIGH_FP(fr84), HIGH_FP(fr85), HIGH_FP(fr86), HIGH_FP(fr87),
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HIGH_FP(fr88), HIGH_FP(fr89), HIGH_FP(fr90), HIGH_FP(fr91),
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HIGH_FP(fr92), HIGH_FP(fr93), HIGH_FP(fr94), HIGH_FP(fr95),
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HIGH_FP(fr96), HIGH_FP(fr97), HIGH_FP(fr98), HIGH_FP(fr99),
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HIGH_FP(fr100), HIGH_FP(fr101), HIGH_FP(fr102), HIGH_FP(fr103),
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HIGH_FP(fr104), HIGH_FP(fr105), HIGH_FP(fr106), HIGH_FP(fr107),
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HIGH_FP(fr108), HIGH_FP(fr109), HIGH_FP(fr110), HIGH_FP(fr111),
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HIGH_FP(fr112), HIGH_FP(fr113), HIGH_FP(fr114), HIGH_FP(fr115),
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HIGH_FP(fr116), HIGH_FP(fr117), HIGH_FP(fr118), HIGH_FP(fr119),
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HIGH_FP(fr120), HIGH_FP(fr121), HIGH_FP(fr122), HIGH_FP(fr123),
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HIGH_FP(fr124), HIGH_FP(fr125), HIGH_FP(fr126), HIGH_FP(fr127),
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/*
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* Predicate registers (256-319)
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* These are not individually available. Predicates are
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* in the pr register.
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*/
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-1, -1, -1, -1, -1, -1, -1, -1, /* pr0-pr7 */
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-1, -1, -1, -1, -1, -1, -1, -1, /* pr8-pr15 */
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-1, -1, -1, -1, -1, -1, -1, -1, /* pr16-pr23 */
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-1, -1, -1, -1, -1, -1, -1, -1, /* pr24-pr31 */
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-1, -1, -1, -1, -1, -1, -1, -1, /* pr32-pr39 */
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-1, -1, -1, -1, -1, -1, -1, -1, /* pr40-pr47 */
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-1, -1, -1, -1, -1, -1, -1, -1, /* pr48-pr55 */
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-1, -1, -1, -1, -1, -1, -1, -1, /* pr56-pr63 */
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/*
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* Branch registers (320-327)
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*/
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SPECIAL(rp),
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PRESERVED(br1), PRESERVED(br2), PRESERVED(br3), PRESERVED(br4),
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PRESERVED(br5),
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SCRATCH(br6), SCRATCH(br7),
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/*
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* Misc other registers (328-333)
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*/
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-1, -1,
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SPECIAL(pr),
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SPECIAL(iip),
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SPECIAL(psr),
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SPECIAL(cfm),
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/*
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* Application registers (334-461)
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*/
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-1, -1, -1, -1, -1, -1, -1, -1, /* ar.k0-ar.k7 */
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-1, -1, -1, -1, -1, -1, -1, -1, /* ar8-ar15 (reserved) */
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SPECIAL(rsc), /* ar.rsc */
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SPECIAL(ndirty), /* ar.bsp !!YEDI!! */
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SPECIAL(bspstore), /* ar.bspstore */
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SPECIAL(rnat), /* ar.rnat */
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-1, /* ar20 (reserved) */
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-1, /* ar.fcr */
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-1, -1, /* ar22-ar23 (reserved) */
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-1, /* ar.eflag */
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SCRATCH(csd), /* ar.csd */
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SCRATCH(ssd), /* ar.ssd */
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-1, /* ar.cflg */
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-1, /* ar.fsr */
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-1, /* ar.fir */
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-1, /* ar.fdr */
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-1, /* ar31 (reserved) */
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SCRATCH(ccv), /* ar.ccv */
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-1, -1, -1, /* ar33-ar35 (reserved) */
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SPECIAL(unat), /* ar.unat */
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-1, -1, -1, /* ar37-ar39 (reserved) */
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SPECIAL(fpsr), /* ar.fpsr */
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-1, -1, -1, /* ar41-ar43 (reserved) */
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-1, /* ar.itc */
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-1, -1, -1, /* ar45-ar47 (reserved) */
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-1, -1, -1, -1, -1, -1, -1, -1, /* ar48-ar55 (ignored) */
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-1, -1, -1, -1, -1, -1, -1, -1, /* ar56-ar63 (ignored) */
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SPECIAL(pfs), /* ar.pfs */
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PRESERVED(lc), /* ar.lc */
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-1, /* ar.ec */
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-1, -1, -1, -1, -1, -1, -1, -1, /* ar67-ar74 (reserved) */
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-1, -1, -1, -1, -1, -1, -1, -1, /* ar75-ar82 (reserved) */
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-1, -1, -1, -1, -1, -1, -1, -1, /* ar83-ar90 (reserved) */
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-1, -1, -1, -1, -1, -1, -1, -1, /* ar91-ar98 (reserved) */
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-1, -1, -1, -1, -1, -1, -1, -1, /* ar99-ar106 (reserved) */
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-1, -1, -1, -1, -1, /* ar107-ar111 (reserved) */
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-1, -1, -1, -1, -1, -1, -1, -1, /* ar112-ar119 (ignored) */
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-1, -1, -1, -1, -1, -1, -1, -1, /* ar120-ar127 (ignored) */
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};
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int
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main()
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{
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int elem, nelems;
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nelems = sizeof(regofs)/sizeof(regofs[0]);
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printf("static int reg_offset[%d] = {", nelems);
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for (elem = 0; elem < nelems; elem++) {
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if ((elem & 7) == 0)
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printf("\n ");
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printf("%4d", regofs[elem]);
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if (elem < nelems - 1)
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putchar(',');
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if ((elem & 7) != 7)
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putchar(' ');
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else
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printf("\t/* Regs %d-%d. */", elem - 7, elem);
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}
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printf("\n};");
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return (0);
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}
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