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68ce205943
This patch is in preparation for software single step support on ARM in
GDBServer. It adds a new shared function regcache_raw_read_unsigned and
regcache_raw_get_unsigned so that GDB and GDBServer can use the same call
to fetch a raw register into an integer.
No regressions, tested on ubuntu 14.04 ARMv7 and x86.
With gdbserver-{native,extended} / { -marm -mthumb }
gdb/ChangeLog:
* Makefile.in (SFILES): Append common/common-regcache.c.
(COMMON_OBS): Append common/common-regcache.o.
(common-regcache.o): New rule.
* common/common-regcache.h (register_status) New enum.
(regcache_raw_read_unsigned): New declaration.
* common/common-regcache.c: New file.
* regcache.h (enum register_status): Move to common-regcache.h.
(regcache_raw_read_unsigned): Likewise.
(regcache_raw_get_unsigned): Likewise.
gdb/gdbserver/ChangeLog:
* Makefile.in (SFILES): Append common/common-regcache.c.
(OBS): Append common-regcache.o.
(common-regcache.o): New rule.
* regcache.c (init_register_cache): Initialize cache to
REG_UNAVAILABLE.
(regcache_raw_read_unsigned): New function.
* regcache.h (REG_UNAVAILABLE, REG_VALID): Replaced by shared
register_status enum.
66 lines
2.4 KiB
C
66 lines
2.4 KiB
C
/* Cache and manage the values of registers
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Copyright (C) 2014-2015 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef COMMON_REGCACHE_H
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#define COMMON_REGCACHE_H
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/* This header is a stopgap until we have an independent regcache. */
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enum register_status
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{
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/* The register value is not in the cache, and we don't know yet
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whether it's available in the target (or traceframe). */
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REG_UNKNOWN = 0,
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/* The register value is valid and cached. */
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REG_VALID = 1,
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/* The register value is unavailable. E.g., we're inspecting a
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traceframe, and this register wasn't collected. Note that this
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is different a different "unavailable" from saying the register
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does not exist in the target's architecture --- in that case,
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the target should have given us a target description that does
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not include the register in the first place. */
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REG_UNAVAILABLE = -1
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};
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/* Return a pointer to the register cache associated with the
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thread specified by PTID. This function must be provided by
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the client. */
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extern struct regcache *get_thread_regcache_for_ptid (ptid_t ptid);
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/* Return the size of register numbered N in REGCACHE. This function
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must be provided by the client. */
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extern int regcache_register_size (const struct regcache *regcache, int n);
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/* Read the PC register. This function must be provided by the
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client. */
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extern CORE_ADDR regcache_read_pc (struct regcache *regcache);
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/* Read a raw register into a unsigned integer. */
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extern enum register_status regcache_raw_read_unsigned
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(struct regcache *regcache, int regnum, ULONGEST *val);
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ULONGEST regcache_raw_get_unsigned (struct regcache *regcache, int regnum);
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#endif /* COMMON_REGCACHE_H */
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