mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-27 03:54:41 +08:00
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
|
|
|
|
Copyright (C) 2014-2024 Free Software Foundation, Inc.
|
|
|
|
This file is part of GDB.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef COMMON_COMMON_REGCACHE_H
|
|
#define COMMON_COMMON_REGCACHE_H
|
|
|
|
struct reg_buffer_common;
|
|
|
|
/* This header is a stopgap until we have an independent regcache. */
|
|
|
|
enum register_status : signed char
|
|
{
|
|
/* The register value is not in the cache, and we don't know yet
|
|
whether it's available in the target (or traceframe). */
|
|
REG_UNKNOWN = 0,
|
|
|
|
/* The register value is valid and cached. */
|
|
REG_VALID = 1,
|
|
|
|
/* The register value is unavailable. E.g., we're inspecting a
|
|
traceframe, and this register wasn't collected. Note that this
|
|
is different a different "unavailable" from saying the register
|
|
does not exist in the target's architecture --- in that case,
|
|
the target should have given us a target description that does
|
|
not include the register in the first place. */
|
|
REG_UNAVAILABLE = -1
|
|
};
|
|
|
|
/* Return a pointer to the register cache associated with the
|
|
thread specified by PTID. This function must be provided by
|
|
the client. */
|
|
|
|
extern reg_buffer_common *get_thread_regcache_for_ptid (ptid_t ptid);
|
|
|
|
/* Return the size of register numbered N in REGCACHE. This function
|
|
must be provided by the client. */
|
|
|
|
extern int regcache_register_size (const reg_buffer_common *regcache, int n);
|
|
|
|
/* Read the PC register. This function must be provided by the
|
|
client. */
|
|
|
|
extern CORE_ADDR regcache_read_pc (reg_buffer_common *regcache);
|
|
|
|
/* Read the PC register. If PC cannot be read, return 0.
|
|
This is a wrapper around 'regcache_read_pc'. */
|
|
|
|
extern CORE_ADDR regcache_read_pc_protected (reg_buffer_common *regcache);
|
|
|
|
/* Read a raw register into a unsigned integer. */
|
|
extern enum register_status
|
|
regcache_raw_read_unsigned (reg_buffer_common *regcache, int regnum,
|
|
ULONGEST *val);
|
|
|
|
ULONGEST regcache_raw_get_unsigned (reg_buffer_common *regcache, int regnum);
|
|
|
|
struct reg_buffer_common
|
|
{
|
|
virtual ~reg_buffer_common () = default;
|
|
|
|
/* Get the availability status of the value of register REGNUM in this
|
|
buffer. */
|
|
virtual register_status get_register_status (int regnum) const = 0;
|
|
|
|
/* Supply register REGNUM, whose contents are stored in SRC, to this register
|
|
buffer. */
|
|
virtual void raw_supply (int regnum, gdb::array_view<const gdb_byte> src)
|
|
= 0;
|
|
|
|
void raw_supply (int regnum, const uint64_t *src)
|
|
{
|
|
raw_supply (regnum,
|
|
gdb::make_array_view ((const gdb_byte *) src, sizeof (*src)));
|
|
}
|
|
|
|
void raw_supply (int regnum, const gdb_byte *src)
|
|
{
|
|
raw_supply (regnum,
|
|
gdb::make_array_view (src,
|
|
regcache_register_size (this, regnum)));
|
|
}
|
|
|
|
/* Supply part of register REGNUM with zeroed value. Start at OFFSET in
|
|
the register, with size SIZE. The rest of the register is left
|
|
untouched. */
|
|
virtual void raw_supply_part_zeroed (int regnum, int offset, size_t size)
|
|
= 0;
|
|
|
|
/* Collect register REGNUM from this register buffer and store its contents in
|
|
DST. */
|
|
virtual void raw_collect (int regnum, gdb::array_view<gdb_byte> dst) const
|
|
= 0;
|
|
|
|
void raw_collect (int regnum, uint64_t *dst) const
|
|
{
|
|
raw_collect (regnum,
|
|
gdb::make_array_view ((gdb_byte *) dst, sizeof (*dst)));
|
|
};
|
|
|
|
void raw_collect (int regnum, gdb_byte *dst)
|
|
{
|
|
raw_collect (regnum,
|
|
gdb::make_array_view (dst,
|
|
regcache_register_size (this, regnum)));
|
|
}
|
|
|
|
/* Compare the contents of the register stored in the regcache (ignoring the
|
|
first OFFSET bytes) to the contents of BUF (without any offset). Returns
|
|
true if the same. */
|
|
virtual bool raw_compare (int regnum, const void *buf, int offset) const = 0;
|
|
};
|
|
|
|
#endif /* COMMON_COMMON_REGCACHE_H */
|