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a4a5f05266
In gdb/aarch64-linux-tdep.c we find:
...
gdb::byte_vector za_zeroed (za_bytes, 0);
regcache->raw_supply (tdep->sme_za_regnum, za_zeroed);
...
We can't use reg_buffer::raw_supply_zeroed here because only part of the
register is written.
Add raw_supply_part_zeroed, and use it instead.
Likewise elsewhere in AArch64 tdep code.
Tested on aarch64-linux.
Approved-By: Luis Machado <luis.machado@arm.com>
130 lines
4.3 KiB
C
130 lines
4.3 KiB
C
/* Cache and manage the values of registers
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Copyright (C) 2014-2024 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_COMMON_REGCACHE_H
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#define COMMON_COMMON_REGCACHE_H
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struct reg_buffer_common;
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/* This header is a stopgap until we have an independent regcache. */
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enum register_status : signed char
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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 reg_buffer_common *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 reg_buffer_common *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 (reg_buffer_common *regcache);
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/* Read the PC register. If PC cannot be read, return 0.
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This is a wrapper around 'regcache_read_pc'. */
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extern CORE_ADDR regcache_read_pc_protected (reg_buffer_common *regcache);
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/* Read a raw register into a unsigned integer. */
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extern enum register_status
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regcache_raw_read_unsigned (reg_buffer_common *regcache, int regnum,
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ULONGEST *val);
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ULONGEST regcache_raw_get_unsigned (reg_buffer_common *regcache, int regnum);
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struct reg_buffer_common
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{
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virtual ~reg_buffer_common () = default;
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/* Get the availability status of the value of register REGNUM in this
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buffer. */
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virtual register_status get_register_status (int regnum) const = 0;
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/* Supply register REGNUM, whose contents are stored in SRC, to this register
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buffer. */
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virtual void raw_supply (int regnum, gdb::array_view<const gdb_byte> src)
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= 0;
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void raw_supply (int regnum, const uint64_t *src)
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{
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raw_supply (regnum,
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gdb::make_array_view ((const gdb_byte *) src, sizeof (*src)));
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}
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void raw_supply (int regnum, const gdb_byte *src)
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{
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raw_supply (regnum,
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gdb::make_array_view (src,
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regcache_register_size (this, regnum)));
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}
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/* Supply part of register REGNUM with zeroed value. Start at OFFSET in
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the register, with size SIZE. The rest of the register is left
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untouched. */
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virtual void raw_supply_part_zeroed (int regnum, int offset, size_t size)
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= 0;
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/* Collect register REGNUM from this register buffer and store its contents in
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DST. */
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virtual void raw_collect (int regnum, gdb::array_view<gdb_byte> dst) const
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= 0;
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void raw_collect (int regnum, uint64_t *dst) const
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{
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raw_collect (regnum,
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gdb::make_array_view ((gdb_byte *) dst, sizeof (*dst)));
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};
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void raw_collect (int regnum, gdb_byte *dst)
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{
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raw_collect (regnum,
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gdb::make_array_view (dst,
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regcache_register_size (this, regnum)));
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}
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/* Compare the contents of the register stored in the regcache (ignoring the
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first OFFSET bytes) to the contents of BUF (without any offset). Returns
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true if the same. */
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virtual bool raw_compare (int regnum, const void *buf, int offset) const = 0;
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};
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#endif /* COMMON_COMMON_REGCACHE_H */
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