1560 lines
46 KiB
C
1560 lines
46 KiB
C
/* Cache and manage the values of registers for GDB, the GNU debugger.
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Copyright (C) 1986-2016 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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#include "defs.h"
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#include "inferior.h"
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#include "target.h"
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#include "gdbarch.h"
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#include "gdbcmd.h"
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#include "regcache.h"
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#include "reggroups.h"
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#include "observer.h"
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#include "remote.h"
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#include "valprint.h"
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#include "regset.h"
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/*
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* DATA STRUCTURE
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*
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* Here is the actual register cache.
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*/
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/* Per-architecture object describing the layout of a register cache.
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Computed once when the architecture is created. */
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struct gdbarch_data *regcache_descr_handle;
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struct regcache_descr
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{
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/* The architecture this descriptor belongs to. */
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struct gdbarch *gdbarch;
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/* The raw register cache. Each raw (or hard) register is supplied
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by the target interface. The raw cache should not contain
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redundant information - if the PC is constructed from two
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registers then those registers and not the PC lives in the raw
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cache. */
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int nr_raw_registers;
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long sizeof_raw_registers;
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long sizeof_raw_register_status;
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/* The cooked register space. Each cooked register in the range
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[0..NR_RAW_REGISTERS) is direct-mapped onto the corresponding raw
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register. The remaining [NR_RAW_REGISTERS
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.. NR_COOKED_REGISTERS) (a.k.a. pseudo registers) are mapped onto
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both raw registers and memory by the architecture methods
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gdbarch_pseudo_register_read and gdbarch_pseudo_register_write. */
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int nr_cooked_registers;
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long sizeof_cooked_registers;
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long sizeof_cooked_register_status;
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/* Offset and size (in 8 bit bytes), of each register in the
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register cache. All registers (including those in the range
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[NR_RAW_REGISTERS .. NR_COOKED_REGISTERS) are given an
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offset. */
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long *register_offset;
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long *sizeof_register;
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/* Cached table containing the type of each register. */
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struct type **register_type;
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};
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static void *
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init_regcache_descr (struct gdbarch *gdbarch)
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{
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int i;
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struct regcache_descr *descr;
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gdb_assert (gdbarch != NULL);
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/* Create an initial, zero filled, table. */
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descr = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct regcache_descr);
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descr->gdbarch = gdbarch;
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/* Total size of the register space. The raw registers are mapped
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directly onto the raw register cache while the pseudo's are
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either mapped onto raw-registers or memory. */
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descr->nr_cooked_registers = gdbarch_num_regs (gdbarch)
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+ gdbarch_num_pseudo_regs (gdbarch);
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descr->sizeof_cooked_register_status
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= gdbarch_num_regs (gdbarch) + gdbarch_num_pseudo_regs (gdbarch);
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/* Fill in a table of register types. */
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descr->register_type
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= GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers,
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struct type *);
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for (i = 0; i < descr->nr_cooked_registers; i++)
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descr->register_type[i] = gdbarch_register_type (gdbarch, i);
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/* Construct a strictly RAW register cache. Don't allow pseudo's
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into the register cache. */
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descr->nr_raw_registers = gdbarch_num_regs (gdbarch);
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descr->sizeof_raw_register_status = gdbarch_num_regs (gdbarch);
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/* Lay out the register cache.
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NOTE: cagney/2002-05-22: Only register_type() is used when
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constructing the register cache. It is assumed that the
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register's raw size, virtual size and type length are all the
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same. */
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{
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long offset = 0;
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descr->sizeof_register
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= GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, long);
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descr->register_offset
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= GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, long);
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for (i = 0; i < descr->nr_raw_registers; i++)
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{
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descr->sizeof_register[i] = TYPE_LENGTH (descr->register_type[i]);
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descr->register_offset[i] = offset;
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offset += descr->sizeof_register[i];
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gdb_assert (MAX_REGISTER_SIZE >= descr->sizeof_register[i]);
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}
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/* Set the real size of the raw register cache buffer. */
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descr->sizeof_raw_registers = offset;
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for (; i < descr->nr_cooked_registers; i++)
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{
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descr->sizeof_register[i] = TYPE_LENGTH (descr->register_type[i]);
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descr->register_offset[i] = offset;
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offset += descr->sizeof_register[i];
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gdb_assert (MAX_REGISTER_SIZE >= descr->sizeof_register[i]);
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}
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/* Set the real size of the readonly register cache buffer. */
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descr->sizeof_cooked_registers = offset;
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}
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return descr;
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}
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static struct regcache_descr *
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regcache_descr (struct gdbarch *gdbarch)
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{
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return (struct regcache_descr *) gdbarch_data (gdbarch,
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regcache_descr_handle);
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}
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/* Utility functions returning useful register attributes stored in
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the regcache descr. */
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struct type *
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register_type (struct gdbarch *gdbarch, int regnum)
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{
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struct regcache_descr *descr = regcache_descr (gdbarch);
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gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers);
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return descr->register_type[regnum];
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}
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/* Utility functions returning useful register attributes stored in
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the regcache descr. */
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int
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register_size (struct gdbarch *gdbarch, int regnum)
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{
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struct regcache_descr *descr = regcache_descr (gdbarch);
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int size;
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gdb_assert (regnum >= 0
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&& regnum < (gdbarch_num_regs (gdbarch)
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+ gdbarch_num_pseudo_regs (gdbarch)));
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size = descr->sizeof_register[regnum];
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return size;
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}
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/* See common/common-regcache.h. */
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int
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regcache_register_size (const struct regcache *regcache, int n)
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{
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return register_size (get_regcache_arch (regcache), n);
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}
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/* The register cache for storing raw register values. */
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struct regcache
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{
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struct regcache_descr *descr;
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/* The address space of this register cache (for registers where it
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makes sense, like PC or SP). */
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struct address_space *aspace;
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/* The register buffers. A read-only register cache can hold the
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full [0 .. gdbarch_num_regs + gdbarch_num_pseudo_regs) while a read/write
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register cache can only hold [0 .. gdbarch_num_regs). */
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gdb_byte *registers;
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/* Register cache status. */
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signed char *register_status;
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/* Is this a read-only cache? A read-only cache is used for saving
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the target's register state (e.g, across an inferior function
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call or just before forcing a function return). A read-only
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cache can only be updated via the methods regcache_dup() and
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regcache_cpy(). The actual contents are determined by the
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reggroup_save and reggroup_restore methods. */
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int readonly_p;
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/* If this is a read-write cache, which thread's registers is
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it connected to? */
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ptid_t ptid;
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};
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static struct regcache *
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regcache_xmalloc_1 (struct gdbarch *gdbarch, struct address_space *aspace,
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int readonly_p)
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{
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struct regcache_descr *descr;
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struct regcache *regcache;
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gdb_assert (gdbarch != NULL);
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descr = regcache_descr (gdbarch);
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regcache = XNEW (struct regcache);
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regcache->descr = descr;
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regcache->readonly_p = readonly_p;
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if (readonly_p)
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{
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regcache->registers
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= XCNEWVEC (gdb_byte, descr->sizeof_cooked_registers);
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regcache->register_status
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= XCNEWVEC (signed char, descr->sizeof_cooked_register_status);
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}
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else
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{
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regcache->registers
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= XCNEWVEC (gdb_byte, descr->sizeof_raw_registers);
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regcache->register_status
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= XCNEWVEC (signed char, descr->sizeof_raw_register_status);
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}
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regcache->aspace = aspace;
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regcache->ptid = minus_one_ptid;
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return regcache;
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}
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struct regcache *
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regcache_xmalloc (struct gdbarch *gdbarch, struct address_space *aspace)
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{
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return regcache_xmalloc_1 (gdbarch, aspace, 1);
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}
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void
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regcache_xfree (struct regcache *regcache)
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{
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if (regcache == NULL)
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return;
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xfree (regcache->registers);
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xfree (regcache->register_status);
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xfree (regcache);
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}
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static void
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do_regcache_xfree (void *data)
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{
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regcache_xfree ((struct regcache *) data);
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}
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struct cleanup *
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make_cleanup_regcache_xfree (struct regcache *regcache)
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{
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return make_cleanup (do_regcache_xfree, regcache);
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}
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/* Cleanup routines for invalidating a register. */
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struct register_to_invalidate
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{
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struct regcache *regcache;
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int regnum;
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};
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static void
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do_regcache_invalidate (void *data)
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{
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struct register_to_invalidate *reg = (struct register_to_invalidate *) data;
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regcache_invalidate (reg->regcache, reg->regnum);
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}
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static struct cleanup *
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make_cleanup_regcache_invalidate (struct regcache *regcache, int regnum)
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{
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struct register_to_invalidate* reg = XNEW (struct register_to_invalidate);
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reg->regcache = regcache;
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reg->regnum = regnum;
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return make_cleanup_dtor (do_regcache_invalidate, (void *) reg, xfree);
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}
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/* Return REGCACHE's architecture. */
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struct gdbarch *
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get_regcache_arch (const struct regcache *regcache)
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{
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return regcache->descr->gdbarch;
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}
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struct address_space *
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get_regcache_aspace (const struct regcache *regcache)
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{
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return regcache->aspace;
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}
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/* Return a pointer to register REGNUM's buffer cache. */
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static gdb_byte *
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register_buffer (const struct regcache *regcache, int regnum)
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{
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return regcache->registers + regcache->descr->register_offset[regnum];
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}
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void
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regcache_save (struct regcache *dst, regcache_cooked_read_ftype *cooked_read,
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void *src)
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{
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struct gdbarch *gdbarch = dst->descr->gdbarch;
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gdb_byte buf[MAX_REGISTER_SIZE];
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int regnum;
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/* The DST should be `read-only', if it wasn't then the save would
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end up trying to write the register values back out to the
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target. */
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gdb_assert (dst->readonly_p);
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/* Clear the dest. */
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memset (dst->registers, 0, dst->descr->sizeof_cooked_registers);
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memset (dst->register_status, 0,
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dst->descr->sizeof_cooked_register_status);
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/* Copy over any registers (identified by their membership in the
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save_reggroup) and mark them as valid. The full [0 .. gdbarch_num_regs +
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gdbarch_num_pseudo_regs) range is checked since some architectures need
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to save/restore `cooked' registers that live in memory. */
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for (regnum = 0; regnum < dst->descr->nr_cooked_registers; regnum++)
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{
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if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup))
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{
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enum register_status status = cooked_read (src, regnum, buf);
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if (status == REG_VALID)
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memcpy (register_buffer (dst, regnum), buf,
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register_size (gdbarch, regnum));
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else
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{
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gdb_assert (status != REG_UNKNOWN);
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memset (register_buffer (dst, regnum), 0,
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register_size (gdbarch, regnum));
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}
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dst->register_status[regnum] = status;
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}
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}
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}
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static void
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regcache_restore (struct regcache *dst,
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regcache_cooked_read_ftype *cooked_read,
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void *cooked_read_context)
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{
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struct gdbarch *gdbarch = dst->descr->gdbarch;
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gdb_byte buf[MAX_REGISTER_SIZE];
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int regnum;
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/* The dst had better not be read-only. If it is, the `restore'
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doesn't make much sense. */
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gdb_assert (!dst->readonly_p);
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/* Copy over any registers, being careful to only restore those that
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were both saved and need to be restored. The full [0 .. gdbarch_num_regs
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+ gdbarch_num_pseudo_regs) range is checked since some architectures need
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to save/restore `cooked' registers that live in memory. */
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for (regnum = 0; regnum < dst->descr->nr_cooked_registers; regnum++)
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{
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if (gdbarch_register_reggroup_p (gdbarch, regnum, restore_reggroup))
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{
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enum register_status status;
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status = cooked_read (cooked_read_context, regnum, buf);
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if (status == REG_VALID)
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regcache_cooked_write (dst, regnum, buf);
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}
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}
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}
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static enum register_status
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do_cooked_read (void *src, int regnum, gdb_byte *buf)
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{
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struct regcache *regcache = (struct regcache *) src;
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return regcache_cooked_read (regcache, regnum, buf);
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}
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static void regcache_cpy_no_passthrough (struct regcache *dst,
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struct regcache *src);
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void
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regcache_cpy (struct regcache *dst, struct regcache *src)
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{
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gdb_assert (src != NULL && dst != NULL);
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gdb_assert (src->descr->gdbarch == dst->descr->gdbarch);
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gdb_assert (src != dst);
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gdb_assert (src->readonly_p || dst->readonly_p);
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if (!src->readonly_p)
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regcache_save (dst, do_cooked_read, src);
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else if (!dst->readonly_p)
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regcache_restore (dst, do_cooked_read, src);
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else
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regcache_cpy_no_passthrough (dst, src);
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}
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/* Copy/duplicate the contents of a register cache. Unlike regcache_cpy,
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which is pass-through, this does not go through to the target.
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Only values values already in the cache are transferred. The SRC and DST
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buffers must not overlap. */
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static void
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regcache_cpy_no_passthrough (struct regcache *dst, struct regcache *src)
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{
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gdb_assert (src != NULL && dst != NULL);
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gdb_assert (src->descr->gdbarch == dst->descr->gdbarch);
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/* NOTE: cagney/2002-05-17: Don't let the caller do a no-passthrough
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move of data into a thread's regcache. Doing this would be silly
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- it would mean that regcache->register_status would be
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completely invalid. */
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gdb_assert (dst->readonly_p && src->readonly_p);
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memcpy (dst->registers, src->registers,
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dst->descr->sizeof_cooked_registers);
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memcpy (dst->register_status, src->register_status,
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dst->descr->sizeof_cooked_register_status);
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}
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struct regcache *
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regcache_dup (struct regcache *src)
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{
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struct regcache *newbuf;
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newbuf = regcache_xmalloc (src->descr->gdbarch, get_regcache_aspace (src));
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regcache_cpy (newbuf, src);
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return newbuf;
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}
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enum register_status
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regcache_register_status (const struct regcache *regcache, int regnum)
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{
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gdb_assert (regcache != NULL);
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gdb_assert (regnum >= 0);
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if (regcache->readonly_p)
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gdb_assert (regnum < regcache->descr->nr_cooked_registers);
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else
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gdb_assert (regnum < regcache->descr->nr_raw_registers);
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return (enum register_status) regcache->register_status[regnum];
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}
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void
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regcache_invalidate (struct regcache *regcache, int regnum)
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{
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gdb_assert (regcache != NULL);
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gdb_assert (regnum >= 0);
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gdb_assert (!regcache->readonly_p);
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gdb_assert (regnum < regcache->descr->nr_raw_registers);
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regcache->register_status[regnum] = REG_UNKNOWN;
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}
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/* Global structure containing the current regcache. */
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/* NOTE: this is a write-through cache. There is no "dirty" bit for
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recording if the register values have been changed (eg. by the
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user). Therefore all registers must be written back to the
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target when appropriate. */
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struct regcache_list
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{
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struct regcache *regcache;
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struct regcache_list *next;
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};
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static struct regcache_list *current_regcache;
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struct regcache *
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get_thread_arch_aspace_regcache (ptid_t ptid, struct gdbarch *gdbarch,
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struct address_space *aspace)
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{
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struct regcache_list *list;
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struct regcache *new_regcache;
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for (list = current_regcache; list; list = list->next)
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if (ptid_equal (list->regcache->ptid, ptid)
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&& get_regcache_arch (list->regcache) == gdbarch)
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return list->regcache;
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new_regcache = regcache_xmalloc_1 (gdbarch, aspace, 0);
|
|
new_regcache->ptid = ptid;
|
|
|
|
list = XNEW (struct regcache_list);
|
|
list->regcache = new_regcache;
|
|
list->next = current_regcache;
|
|
current_regcache = list;
|
|
|
|
return new_regcache;
|
|
}
|
|
|
|
struct regcache *
|
|
get_thread_arch_regcache (ptid_t ptid, struct gdbarch *gdbarch)
|
|
{
|
|
struct address_space *aspace;
|
|
|
|
/* For the benefit of "maint print registers" & co when debugging an
|
|
executable, allow dumping the regcache even when there is no
|
|
thread selected (target_thread_address_space internal-errors if
|
|
no address space is found). Note that normal user commands will
|
|
fail higher up on the call stack due to no
|
|
target_has_registers. */
|
|
aspace = (ptid_equal (null_ptid, ptid)
|
|
? NULL
|
|
: target_thread_address_space (ptid));
|
|
|
|
return get_thread_arch_aspace_regcache (ptid, gdbarch, aspace);
|
|
}
|
|
|
|
static ptid_t current_thread_ptid;
|
|
static struct gdbarch *current_thread_arch;
|
|
|
|
struct regcache *
|
|
get_thread_regcache (ptid_t ptid)
|
|
{
|
|
if (!current_thread_arch || !ptid_equal (current_thread_ptid, ptid))
|
|
{
|
|
current_thread_ptid = ptid;
|
|
current_thread_arch = target_thread_architecture (ptid);
|
|
}
|
|
|
|
return get_thread_arch_regcache (ptid, current_thread_arch);
|
|
}
|
|
|
|
struct regcache *
|
|
get_current_regcache (void)
|
|
{
|
|
return get_thread_regcache (inferior_ptid);
|
|
}
|
|
|
|
/* See common/common-regcache.h. */
|
|
|
|
struct regcache *
|
|
get_thread_regcache_for_ptid (ptid_t ptid)
|
|
{
|
|
return get_thread_regcache (ptid);
|
|
}
|
|
|
|
/* Observer for the target_changed event. */
|
|
|
|
static void
|
|
regcache_observer_target_changed (struct target_ops *target)
|
|
{
|
|
registers_changed ();
|
|
}
|
|
|
|
/* Update global variables old ptids to hold NEW_PTID if they were
|
|
holding OLD_PTID. */
|
|
static void
|
|
regcache_thread_ptid_changed (ptid_t old_ptid, ptid_t new_ptid)
|
|
{
|
|
struct regcache_list *list;
|
|
|
|
for (list = current_regcache; list; list = list->next)
|
|
if (ptid_equal (list->regcache->ptid, old_ptid))
|
|
list->regcache->ptid = new_ptid;
|
|
}
|
|
|
|
/* Low level examining and depositing of registers.
|
|
|
|
The caller is responsible for making sure that the inferior is
|
|
stopped before calling the fetching routines, or it will get
|
|
garbage. (a change from GDB version 3, in which the caller got the
|
|
value from the last stop). */
|
|
|
|
/* REGISTERS_CHANGED ()
|
|
|
|
Indicate that registers may have changed, so invalidate the cache. */
|
|
|
|
void
|
|
registers_changed_ptid (ptid_t ptid)
|
|
{
|
|
struct regcache_list *list, **list_link;
|
|
|
|
list = current_regcache;
|
|
list_link = ¤t_regcache;
|
|
while (list)
|
|
{
|
|
if (ptid_match (list->regcache->ptid, ptid))
|
|
{
|
|
struct regcache_list *dead = list;
|
|
|
|
*list_link = list->next;
|
|
regcache_xfree (list->regcache);
|
|
list = *list_link;
|
|
xfree (dead);
|
|
continue;
|
|
}
|
|
|
|
list_link = &list->next;
|
|
list = *list_link;
|
|
}
|
|
|
|
if (ptid_match (current_thread_ptid, ptid))
|
|
{
|
|
current_thread_ptid = null_ptid;
|
|
current_thread_arch = NULL;
|
|
}
|
|
|
|
if (ptid_match (inferior_ptid, ptid))
|
|
{
|
|
/* We just deleted the regcache of the current thread. Need to
|
|
forget about any frames we have cached, too. */
|
|
reinit_frame_cache ();
|
|
}
|
|
}
|
|
|
|
void
|
|
registers_changed (void)
|
|
{
|
|
registers_changed_ptid (minus_one_ptid);
|
|
|
|
/* Force cleanup of any alloca areas if using C alloca instead of
|
|
a builtin alloca. This particular call is used to clean up
|
|
areas allocated by low level target code which may build up
|
|
during lengthy interactions between gdb and the target before
|
|
gdb gives control to the user (ie watchpoints). */
|
|
alloca (0);
|
|
}
|
|
|
|
enum register_status
|
|
regcache_raw_read (struct regcache *regcache, int regnum, gdb_byte *buf)
|
|
{
|
|
gdb_assert (regcache != NULL && buf != NULL);
|
|
gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers);
|
|
/* Make certain that the register cache is up-to-date with respect
|
|
to the current thread. This switching shouldn't be necessary
|
|
only there is still only one target side register cache. Sigh!
|
|
On the bright side, at least there is a regcache object. */
|
|
if (!regcache->readonly_p
|
|
&& regcache_register_status (regcache, regnum) == REG_UNKNOWN)
|
|
{
|
|
struct cleanup *old_chain = save_inferior_ptid ();
|
|
|
|
inferior_ptid = regcache->ptid;
|
|
target_fetch_registers (regcache, regnum);
|
|
do_cleanups (old_chain);
|
|
|
|
/* A number of targets can't access the whole set of raw
|
|
registers (because the debug API provides no means to get at
|
|
them). */
|
|
if (regcache->register_status[regnum] == REG_UNKNOWN)
|
|
regcache->register_status[regnum] = REG_UNAVAILABLE;
|
|
}
|
|
|
|
if (regcache->register_status[regnum] != REG_VALID)
|
|
memset (buf, 0, regcache->descr->sizeof_register[regnum]);
|
|
else
|
|
memcpy (buf, register_buffer (regcache, regnum),
|
|
regcache->descr->sizeof_register[regnum]);
|
|
|
|
return (enum register_status) regcache->register_status[regnum];
|
|
}
|
|
|
|
enum register_status
|
|
regcache_raw_read_signed (struct regcache *regcache, int regnum, LONGEST *val)
|
|
{
|
|
gdb_byte *buf;
|
|
enum register_status status;
|
|
|
|
gdb_assert (regcache != NULL);
|
|
gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers);
|
|
buf = (gdb_byte *) alloca (regcache->descr->sizeof_register[regnum]);
|
|
status = regcache_raw_read (regcache, regnum, buf);
|
|
if (status == REG_VALID)
|
|
*val = extract_signed_integer
|
|
(buf, regcache->descr->sizeof_register[regnum],
|
|
gdbarch_byte_order (regcache->descr->gdbarch));
|
|
else
|
|
*val = 0;
|
|
return status;
|
|
}
|
|
|
|
enum register_status
|
|
regcache_raw_read_unsigned (struct regcache *regcache, int regnum,
|
|
ULONGEST *val)
|
|
{
|
|
gdb_byte *buf;
|
|
enum register_status status;
|
|
|
|
gdb_assert (regcache != NULL);
|
|
gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers);
|
|
buf = (gdb_byte *) alloca (regcache->descr->sizeof_register[regnum]);
|
|
status = regcache_raw_read (regcache, regnum, buf);
|
|
if (status == REG_VALID)
|
|
*val = extract_unsigned_integer
|
|
(buf, regcache->descr->sizeof_register[regnum],
|
|
gdbarch_byte_order (regcache->descr->gdbarch));
|
|
else
|
|
*val = 0;
|
|
return status;
|
|
}
|
|
|
|
void
|
|
regcache_raw_write_signed (struct regcache *regcache, int regnum, LONGEST val)
|
|
{
|
|
gdb_byte *buf;
|
|
|
|
gdb_assert (regcache != NULL);
|
|
gdb_assert (regnum >=0 && regnum < regcache->descr->nr_raw_registers);
|
|
buf = (gdb_byte *) alloca (regcache->descr->sizeof_register[regnum]);
|
|
store_signed_integer (buf, regcache->descr->sizeof_register[regnum],
|
|
gdbarch_byte_order (regcache->descr->gdbarch), val);
|
|
regcache_raw_write (regcache, regnum, buf);
|
|
}
|
|
|
|
void
|
|
regcache_raw_write_unsigned (struct regcache *regcache, int regnum,
|
|
ULONGEST val)
|
|
{
|
|
gdb_byte *buf;
|
|
|
|
gdb_assert (regcache != NULL);
|
|
gdb_assert (regnum >=0 && regnum < regcache->descr->nr_raw_registers);
|
|
buf = (gdb_byte *) alloca (regcache->descr->sizeof_register[regnum]);
|
|
store_unsigned_integer (buf, regcache->descr->sizeof_register[regnum],
|
|
gdbarch_byte_order (regcache->descr->gdbarch), val);
|
|
regcache_raw_write (regcache, regnum, buf);
|
|
}
|
|
|
|
enum register_status
|
|
regcache_cooked_read (struct regcache *regcache, int regnum, gdb_byte *buf)
|
|
{
|
|
gdb_assert (regnum >= 0);
|
|
gdb_assert (regnum < regcache->descr->nr_cooked_registers);
|
|
if (regnum < regcache->descr->nr_raw_registers)
|
|
return regcache_raw_read (regcache, regnum, buf);
|
|
else if (regcache->readonly_p
|
|
&& regcache->register_status[regnum] != REG_UNKNOWN)
|
|
{
|
|
/* Read-only register cache, perhaps the cooked value was
|
|
cached? */
|
|
if (regcache->register_status[regnum] == REG_VALID)
|
|
memcpy (buf, register_buffer (regcache, regnum),
|
|
regcache->descr->sizeof_register[regnum]);
|
|
else
|
|
memset (buf, 0, regcache->descr->sizeof_register[regnum]);
|
|
|
|
return (enum register_status) regcache->register_status[regnum];
|
|
}
|
|
else if (gdbarch_pseudo_register_read_value_p (regcache->descr->gdbarch))
|
|
{
|
|
struct value *mark, *computed;
|
|
enum register_status result = REG_VALID;
|
|
|
|
mark = value_mark ();
|
|
|
|
computed = gdbarch_pseudo_register_read_value (regcache->descr->gdbarch,
|
|
regcache, regnum);
|
|
if (value_entirely_available (computed))
|
|
memcpy (buf, value_contents_raw (computed),
|
|
regcache->descr->sizeof_register[regnum]);
|
|
else
|
|
{
|
|
memset (buf, 0, regcache->descr->sizeof_register[regnum]);
|
|
result = REG_UNAVAILABLE;
|
|
}
|
|
|
|
value_free_to_mark (mark);
|
|
|
|
return result;
|
|
}
|
|
else
|
|
return gdbarch_pseudo_register_read (regcache->descr->gdbarch, regcache,
|
|
regnum, buf);
|
|
}
|
|
|
|
struct value *
|
|
regcache_cooked_read_value (struct regcache *regcache, int regnum)
|
|
{
|
|
gdb_assert (regnum >= 0);
|
|
gdb_assert (regnum < regcache->descr->nr_cooked_registers);
|
|
|
|
if (regnum < regcache->descr->nr_raw_registers
|
|
|| (regcache->readonly_p
|
|
&& regcache->register_status[regnum] != REG_UNKNOWN)
|
|
|| !gdbarch_pseudo_register_read_value_p (regcache->descr->gdbarch))
|
|
{
|
|
struct value *result;
|
|
|
|
result = allocate_value (register_type (regcache->descr->gdbarch,
|
|
regnum));
|
|
VALUE_LVAL (result) = lval_register;
|
|
VALUE_REGNUM (result) = regnum;
|
|
|
|
/* It is more efficient in general to do this delegation in this
|
|
direction than in the other one, even though the value-based
|
|
API is preferred. */
|
|
if (regcache_cooked_read (regcache, regnum,
|
|
value_contents_raw (result)) == REG_UNAVAILABLE)
|
|
mark_value_bytes_unavailable (result, 0,
|
|
TYPE_LENGTH (value_type (result)));
|
|
|
|
return result;
|
|
}
|
|
else
|
|
return gdbarch_pseudo_register_read_value (regcache->descr->gdbarch,
|
|
regcache, regnum);
|
|
}
|
|
|
|
enum register_status
|
|
regcache_cooked_read_signed (struct regcache *regcache, int regnum,
|
|
LONGEST *val)
|
|
{
|
|
enum register_status status;
|
|
gdb_byte *buf;
|
|
|
|
gdb_assert (regcache != NULL);
|
|
gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_cooked_registers);
|
|
buf = (gdb_byte *) alloca (regcache->descr->sizeof_register[regnum]);
|
|
status = regcache_cooked_read (regcache, regnum, buf);
|
|
if (status == REG_VALID)
|
|
*val = extract_signed_integer
|
|
(buf, regcache->descr->sizeof_register[regnum],
|
|
gdbarch_byte_order (regcache->descr->gdbarch));
|
|
else
|
|
*val = 0;
|
|
return status;
|
|
}
|
|
|
|
enum register_status
|
|
regcache_cooked_read_unsigned (struct regcache *regcache, int regnum,
|
|
ULONGEST *val)
|
|
{
|
|
enum register_status status;
|
|
gdb_byte *buf;
|
|
|
|
gdb_assert (regcache != NULL);
|
|
gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_cooked_registers);
|
|
buf = (gdb_byte *) alloca (regcache->descr->sizeof_register[regnum]);
|
|
status = regcache_cooked_read (regcache, regnum, buf);
|
|
if (status == REG_VALID)
|
|
*val = extract_unsigned_integer
|
|
(buf, regcache->descr->sizeof_register[regnum],
|
|
gdbarch_byte_order (regcache->descr->gdbarch));
|
|
else
|
|
*val = 0;
|
|
return status;
|
|
}
|
|
|
|
void
|
|
regcache_cooked_write_signed (struct regcache *regcache, int regnum,
|
|
LONGEST val)
|
|
{
|
|
gdb_byte *buf;
|
|
|
|
gdb_assert (regcache != NULL);
|
|
gdb_assert (regnum >=0 && regnum < regcache->descr->nr_cooked_registers);
|
|
buf = (gdb_byte *) alloca (regcache->descr->sizeof_register[regnum]);
|
|
store_signed_integer (buf, regcache->descr->sizeof_register[regnum],
|
|
gdbarch_byte_order (regcache->descr->gdbarch), val);
|
|
regcache_cooked_write (regcache, regnum, buf);
|
|
}
|
|
|
|
void
|
|
regcache_cooked_write_unsigned (struct regcache *regcache, int regnum,
|
|
ULONGEST val)
|
|
{
|
|
gdb_byte *buf;
|
|
|
|
gdb_assert (regcache != NULL);
|
|
gdb_assert (regnum >=0 && regnum < regcache->descr->nr_cooked_registers);
|
|
buf = (gdb_byte *) alloca (regcache->descr->sizeof_register[regnum]);
|
|
store_unsigned_integer (buf, regcache->descr->sizeof_register[regnum],
|
|
gdbarch_byte_order (regcache->descr->gdbarch), val);
|
|
regcache_cooked_write (regcache, regnum, buf);
|
|
}
|
|
|
|
void
|
|
regcache_raw_write (struct regcache *regcache, int regnum,
|
|
const gdb_byte *buf)
|
|
{
|
|
struct cleanup *chain_before_save_inferior;
|
|
struct cleanup *chain_before_invalidate_register;
|
|
|
|
gdb_assert (regcache != NULL && buf != NULL);
|
|
gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers);
|
|
gdb_assert (!regcache->readonly_p);
|
|
|
|
/* On the sparc, writing %g0 is a no-op, so we don't even want to
|
|
change the registers array if something writes to this register. */
|
|
if (gdbarch_cannot_store_register (get_regcache_arch (regcache), regnum))
|
|
return;
|
|
|
|
/* If we have a valid copy of the register, and new value == old
|
|
value, then don't bother doing the actual store. */
|
|
if (regcache_register_status (regcache, regnum) == REG_VALID
|
|
&& (memcmp (register_buffer (regcache, regnum), buf,
|
|
regcache->descr->sizeof_register[regnum]) == 0))
|
|
return;
|
|
|
|
chain_before_save_inferior = save_inferior_ptid ();
|
|
inferior_ptid = regcache->ptid;
|
|
|
|
target_prepare_to_store (regcache);
|
|
memcpy (register_buffer (regcache, regnum), buf,
|
|
regcache->descr->sizeof_register[regnum]);
|
|
regcache->register_status[regnum] = REG_VALID;
|
|
|
|
/* Register a cleanup function for invalidating the register after it is
|
|
written, in case of a failure. */
|
|
chain_before_invalidate_register
|
|
= make_cleanup_regcache_invalidate (regcache, regnum);
|
|
|
|
target_store_registers (regcache, regnum);
|
|
|
|
/* The target did not throw an error so we can discard invalidating the
|
|
register and restore the cleanup chain to what it was. */
|
|
discard_cleanups (chain_before_invalidate_register);
|
|
|
|
do_cleanups (chain_before_save_inferior);
|
|
}
|
|
|
|
void
|
|
regcache_cooked_write (struct regcache *regcache, int regnum,
|
|
const gdb_byte *buf)
|
|
{
|
|
gdb_assert (regnum >= 0);
|
|
gdb_assert (regnum < regcache->descr->nr_cooked_registers);
|
|
if (regnum < regcache->descr->nr_raw_registers)
|
|
regcache_raw_write (regcache, regnum, buf);
|
|
else
|
|
gdbarch_pseudo_register_write (regcache->descr->gdbarch, regcache,
|
|
regnum, buf);
|
|
}
|
|
|
|
/* Perform a partial register transfer using a read, modify, write
|
|
operation. */
|
|
|
|
typedef void (regcache_read_ftype) (struct regcache *regcache, int regnum,
|
|
void *buf);
|
|
typedef void (regcache_write_ftype) (struct regcache *regcache, int regnum,
|
|
const void *buf);
|
|
|
|
static enum register_status
|
|
regcache_xfer_part (struct regcache *regcache, int regnum,
|
|
int offset, int len, void *in, const void *out,
|
|
enum register_status (*read) (struct regcache *regcache,
|
|
int regnum,
|
|
gdb_byte *buf),
|
|
void (*write) (struct regcache *regcache, int regnum,
|
|
const gdb_byte *buf))
|
|
{
|
|
struct regcache_descr *descr = regcache->descr;
|
|
gdb_byte reg[MAX_REGISTER_SIZE];
|
|
|
|
gdb_assert (offset >= 0 && offset <= descr->sizeof_register[regnum]);
|
|
gdb_assert (len >= 0 && offset + len <= descr->sizeof_register[regnum]);
|
|
/* Something to do? */
|
|
if (offset + len == 0)
|
|
return REG_VALID;
|
|
/* Read (when needed) ... */
|
|
if (in != NULL
|
|
|| offset > 0
|
|
|| offset + len < descr->sizeof_register[regnum])
|
|
{
|
|
enum register_status status;
|
|
|
|
gdb_assert (read != NULL);
|
|
status = read (regcache, regnum, reg);
|
|
if (status != REG_VALID)
|
|
return status;
|
|
}
|
|
/* ... modify ... */
|
|
if (in != NULL)
|
|
memcpy (in, reg + offset, len);
|
|
if (out != NULL)
|
|
memcpy (reg + offset, out, len);
|
|
/* ... write (when needed). */
|
|
if (out != NULL)
|
|
{
|
|
gdb_assert (write != NULL);
|
|
write (regcache, regnum, reg);
|
|
}
|
|
|
|
return REG_VALID;
|
|
}
|
|
|
|
enum register_status
|
|
regcache_raw_read_part (struct regcache *regcache, int regnum,
|
|
int offset, int len, gdb_byte *buf)
|
|
{
|
|
struct regcache_descr *descr = regcache->descr;
|
|
|
|
gdb_assert (regnum >= 0 && regnum < descr->nr_raw_registers);
|
|
return regcache_xfer_part (regcache, regnum, offset, len, buf, NULL,
|
|
regcache_raw_read, regcache_raw_write);
|
|
}
|
|
|
|
void
|
|
regcache_raw_write_part (struct regcache *regcache, int regnum,
|
|
int offset, int len, const gdb_byte *buf)
|
|
{
|
|
struct regcache_descr *descr = regcache->descr;
|
|
|
|
gdb_assert (regnum >= 0 && regnum < descr->nr_raw_registers);
|
|
regcache_xfer_part (regcache, regnum, offset, len, NULL, buf,
|
|
regcache_raw_read, regcache_raw_write);
|
|
}
|
|
|
|
enum register_status
|
|
regcache_cooked_read_part (struct regcache *regcache, int regnum,
|
|
int offset, int len, gdb_byte *buf)
|
|
{
|
|
struct regcache_descr *descr = regcache->descr;
|
|
|
|
gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers);
|
|
return regcache_xfer_part (regcache, regnum, offset, len, buf, NULL,
|
|
regcache_cooked_read, regcache_cooked_write);
|
|
}
|
|
|
|
void
|
|
regcache_cooked_write_part (struct regcache *regcache, int regnum,
|
|
int offset, int len, const gdb_byte *buf)
|
|
{
|
|
struct regcache_descr *descr = regcache->descr;
|
|
|
|
gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers);
|
|
regcache_xfer_part (regcache, regnum, offset, len, NULL, buf,
|
|
regcache_cooked_read, regcache_cooked_write);
|
|
}
|
|
|
|
/* Supply register REGNUM, whose contents are stored in BUF, to REGCACHE. */
|
|
|
|
void
|
|
regcache_raw_supply (struct regcache *regcache, int regnum, const void *buf)
|
|
{
|
|
void *regbuf;
|
|
size_t size;
|
|
|
|
gdb_assert (regcache != NULL);
|
|
gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers);
|
|
gdb_assert (!regcache->readonly_p);
|
|
|
|
regbuf = register_buffer (regcache, regnum);
|
|
size = regcache->descr->sizeof_register[regnum];
|
|
|
|
if (buf)
|
|
{
|
|
memcpy (regbuf, buf, size);
|
|
regcache->register_status[regnum] = REG_VALID;
|
|
}
|
|
else
|
|
{
|
|
/* This memset not strictly necessary, but better than garbage
|
|
in case the register value manages to escape somewhere (due
|
|
to a bug, no less). */
|
|
memset (regbuf, 0, size);
|
|
regcache->register_status[regnum] = REG_UNAVAILABLE;
|
|
}
|
|
}
|
|
|
|
/* Collect register REGNUM from REGCACHE and store its contents in BUF. */
|
|
|
|
void
|
|
regcache_raw_collect (const struct regcache *regcache, int regnum, void *buf)
|
|
{
|
|
const void *regbuf;
|
|
size_t size;
|
|
|
|
gdb_assert (regcache != NULL && buf != NULL);
|
|
gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers);
|
|
|
|
regbuf = register_buffer (regcache, regnum);
|
|
size = regcache->descr->sizeof_register[regnum];
|
|
memcpy (buf, regbuf, size);
|
|
}
|
|
|
|
/* Transfer a single or all registers belonging to a certain register
|
|
set to or from a buffer. This is the main worker function for
|
|
regcache_supply_regset and regcache_collect_regset. */
|
|
|
|
static void
|
|
regcache_transfer_regset (const struct regset *regset,
|
|
const struct regcache *regcache,
|
|
struct regcache *out_regcache,
|
|
int regnum, const void *in_buf,
|
|
void *out_buf, size_t size)
|
|
{
|
|
const struct regcache_map_entry *map;
|
|
int offs = 0, count;
|
|
|
|
for (map = (const struct regcache_map_entry *) regset->regmap;
|
|
(count = map->count) != 0;
|
|
map++)
|
|
{
|
|
int regno = map->regno;
|
|
int slot_size = map->size;
|
|
|
|
if (slot_size == 0 && regno != REGCACHE_MAP_SKIP)
|
|
slot_size = regcache->descr->sizeof_register[regno];
|
|
|
|
if (regno == REGCACHE_MAP_SKIP
|
|
|| (regnum != -1
|
|
&& (regnum < regno || regnum >= regno + count)))
|
|
offs += count * slot_size;
|
|
|
|
else if (regnum == -1)
|
|
for (; count--; regno++, offs += slot_size)
|
|
{
|
|
if (offs + slot_size > size)
|
|
break;
|
|
|
|
if (out_buf)
|
|
regcache_raw_collect (regcache, regno,
|
|
(gdb_byte *) out_buf + offs);
|
|
else
|
|
regcache_raw_supply (out_regcache, regno, in_buf
|
|
? (const gdb_byte *) in_buf + offs
|
|
: NULL);
|
|
}
|
|
else
|
|
{
|
|
/* Transfer a single register and return. */
|
|
offs += (regnum - regno) * slot_size;
|
|
if (offs + slot_size > size)
|
|
return;
|
|
|
|
if (out_buf)
|
|
regcache_raw_collect (regcache, regnum,
|
|
(gdb_byte *) out_buf + offs);
|
|
else
|
|
regcache_raw_supply (out_regcache, regnum, in_buf
|
|
? (const gdb_byte *) in_buf + offs
|
|
: NULL);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Supply register REGNUM from BUF to REGCACHE, using the register map
|
|
in REGSET. If REGNUM is -1, do this for all registers in REGSET.
|
|
If BUF is NULL, set the register(s) to "unavailable" status. */
|
|
|
|
void
|
|
regcache_supply_regset (const struct regset *regset,
|
|
struct regcache *regcache,
|
|
int regnum, const void *buf, size_t size)
|
|
{
|
|
regcache_transfer_regset (regset, regcache, regcache, regnum,
|
|
buf, NULL, size);
|
|
}
|
|
|
|
/* Collect register REGNUM from REGCACHE to BUF, using the register
|
|
map in REGSET. If REGNUM is -1, do this for all registers in
|
|
REGSET. */
|
|
|
|
void
|
|
regcache_collect_regset (const struct regset *regset,
|
|
const struct regcache *regcache,
|
|
int regnum, void *buf, size_t size)
|
|
{
|
|
regcache_transfer_regset (regset, regcache, NULL, regnum,
|
|
NULL, buf, size);
|
|
}
|
|
|
|
|
|
/* Special handling for register PC. */
|
|
|
|
CORE_ADDR
|
|
regcache_read_pc (struct regcache *regcache)
|
|
{
|
|
struct gdbarch *gdbarch = get_regcache_arch (regcache);
|
|
|
|
CORE_ADDR pc_val;
|
|
|
|
if (gdbarch_read_pc_p (gdbarch))
|
|
pc_val = gdbarch_read_pc (gdbarch, regcache);
|
|
/* Else use per-frame method on get_current_frame. */
|
|
else if (gdbarch_pc_regnum (gdbarch) >= 0)
|
|
{
|
|
ULONGEST raw_val;
|
|
|
|
if (regcache_cooked_read_unsigned (regcache,
|
|
gdbarch_pc_regnum (gdbarch),
|
|
&raw_val) == REG_UNAVAILABLE)
|
|
throw_error (NOT_AVAILABLE_ERROR, _("PC register is not available"));
|
|
|
|
pc_val = gdbarch_addr_bits_remove (gdbarch, raw_val);
|
|
}
|
|
else
|
|
internal_error (__FILE__, __LINE__,
|
|
_("regcache_read_pc: Unable to find PC"));
|
|
return pc_val;
|
|
}
|
|
|
|
void
|
|
regcache_write_pc (struct regcache *regcache, CORE_ADDR pc)
|
|
{
|
|
struct gdbarch *gdbarch = get_regcache_arch (regcache);
|
|
|
|
if (gdbarch_write_pc_p (gdbarch))
|
|
gdbarch_write_pc (gdbarch, regcache, pc);
|
|
else if (gdbarch_pc_regnum (gdbarch) >= 0)
|
|
regcache_cooked_write_unsigned (regcache,
|
|
gdbarch_pc_regnum (gdbarch), pc);
|
|
else
|
|
internal_error (__FILE__, __LINE__,
|
|
_("regcache_write_pc: Unable to update PC"));
|
|
|
|
/* Writing the PC (for instance, from "load") invalidates the
|
|
current frame. */
|
|
reinit_frame_cache ();
|
|
}
|
|
|
|
|
|
static void
|
|
reg_flush_command (char *command, int from_tty)
|
|
{
|
|
/* Force-flush the register cache. */
|
|
registers_changed ();
|
|
if (from_tty)
|
|
printf_filtered (_("Register cache flushed.\n"));
|
|
}
|
|
|
|
enum regcache_dump_what
|
|
{
|
|
regcache_dump_none, regcache_dump_raw,
|
|
regcache_dump_cooked, regcache_dump_groups,
|
|
regcache_dump_remote
|
|
};
|
|
|
|
static void
|
|
regcache_dump (struct regcache *regcache, struct ui_file *file,
|
|
enum regcache_dump_what what_to_dump)
|
|
{
|
|
struct cleanup *cleanups = make_cleanup (null_cleanup, NULL);
|
|
struct gdbarch *gdbarch = regcache->descr->gdbarch;
|
|
int regnum;
|
|
int footnote_nr = 0;
|
|
int footnote_register_size = 0;
|
|
int footnote_register_offset = 0;
|
|
int footnote_register_type_name_null = 0;
|
|
long register_offset = 0;
|
|
gdb_byte buf[MAX_REGISTER_SIZE];
|
|
|
|
#if 0
|
|
fprintf_unfiltered (file, "nr_raw_registers %d\n",
|
|
regcache->descr->nr_raw_registers);
|
|
fprintf_unfiltered (file, "nr_cooked_registers %d\n",
|
|
regcache->descr->nr_cooked_registers);
|
|
fprintf_unfiltered (file, "sizeof_raw_registers %ld\n",
|
|
regcache->descr->sizeof_raw_registers);
|
|
fprintf_unfiltered (file, "sizeof_raw_register_status %ld\n",
|
|
regcache->descr->sizeof_raw_register_status);
|
|
fprintf_unfiltered (file, "gdbarch_num_regs %d\n",
|
|
gdbarch_num_regs (gdbarch));
|
|
fprintf_unfiltered (file, "gdbarch_num_pseudo_regs %d\n",
|
|
gdbarch_num_pseudo_regs (gdbarch));
|
|
#endif
|
|
|
|
gdb_assert (regcache->descr->nr_cooked_registers
|
|
== (gdbarch_num_regs (gdbarch)
|
|
+ gdbarch_num_pseudo_regs (gdbarch)));
|
|
|
|
for (regnum = -1; regnum < regcache->descr->nr_cooked_registers; regnum++)
|
|
{
|
|
/* Name. */
|
|
if (regnum < 0)
|
|
fprintf_unfiltered (file, " %-10s", "Name");
|
|
else
|
|
{
|
|
const char *p = gdbarch_register_name (gdbarch, regnum);
|
|
|
|
if (p == NULL)
|
|
p = "";
|
|
else if (p[0] == '\0')
|
|
p = "''";
|
|
fprintf_unfiltered (file, " %-10s", p);
|
|
}
|
|
|
|
/* Number. */
|
|
if (regnum < 0)
|
|
fprintf_unfiltered (file, " %4s", "Nr");
|
|
else
|
|
fprintf_unfiltered (file, " %4d", regnum);
|
|
|
|
/* Relative number. */
|
|
if (regnum < 0)
|
|
fprintf_unfiltered (file, " %4s", "Rel");
|
|
else if (regnum < gdbarch_num_regs (gdbarch))
|
|
fprintf_unfiltered (file, " %4d", regnum);
|
|
else
|
|
fprintf_unfiltered (file, " %4d",
|
|
(regnum - gdbarch_num_regs (gdbarch)));
|
|
|
|
/* Offset. */
|
|
if (regnum < 0)
|
|
fprintf_unfiltered (file, " %6s ", "Offset");
|
|
else
|
|
{
|
|
fprintf_unfiltered (file, " %6ld",
|
|
regcache->descr->register_offset[regnum]);
|
|
if (register_offset != regcache->descr->register_offset[regnum]
|
|
|| (regnum > 0
|
|
&& (regcache->descr->register_offset[regnum]
|
|
!= (regcache->descr->register_offset[regnum - 1]
|
|
+ regcache->descr->sizeof_register[regnum - 1])))
|
|
)
|
|
{
|
|
if (!footnote_register_offset)
|
|
footnote_register_offset = ++footnote_nr;
|
|
fprintf_unfiltered (file, "*%d", footnote_register_offset);
|
|
}
|
|
else
|
|
fprintf_unfiltered (file, " ");
|
|
register_offset = (regcache->descr->register_offset[regnum]
|
|
+ regcache->descr->sizeof_register[regnum]);
|
|
}
|
|
|
|
/* Size. */
|
|
if (regnum < 0)
|
|
fprintf_unfiltered (file, " %5s ", "Size");
|
|
else
|
|
fprintf_unfiltered (file, " %5ld",
|
|
regcache->descr->sizeof_register[regnum]);
|
|
|
|
/* Type. */
|
|
{
|
|
const char *t;
|
|
|
|
if (regnum < 0)
|
|
t = "Type";
|
|
else
|
|
{
|
|
static const char blt[] = "builtin_type";
|
|
|
|
t = TYPE_NAME (register_type (regcache->descr->gdbarch, regnum));
|
|
if (t == NULL)
|
|
{
|
|
char *n;
|
|
|
|
if (!footnote_register_type_name_null)
|
|
footnote_register_type_name_null = ++footnote_nr;
|
|
n = xstrprintf ("*%d", footnote_register_type_name_null);
|
|
make_cleanup (xfree, n);
|
|
t = n;
|
|
}
|
|
/* Chop a leading builtin_type. */
|
|
if (startswith (t, blt))
|
|
t += strlen (blt);
|
|
}
|
|
fprintf_unfiltered (file, " %-15s", t);
|
|
}
|
|
|
|
/* Leading space always present. */
|
|
fprintf_unfiltered (file, " ");
|
|
|
|
/* Value, raw. */
|
|
if (what_to_dump == regcache_dump_raw)
|
|
{
|
|
if (regnum < 0)
|
|
fprintf_unfiltered (file, "Raw value");
|
|
else if (regnum >= regcache->descr->nr_raw_registers)
|
|
fprintf_unfiltered (file, "<cooked>");
|
|
else if (regcache_register_status (regcache, regnum) == REG_UNKNOWN)
|
|
fprintf_unfiltered (file, "<invalid>");
|
|
else if (regcache_register_status (regcache, regnum) == REG_UNAVAILABLE)
|
|
fprintf_unfiltered (file, "<unavailable>");
|
|
else
|
|
{
|
|
regcache_raw_read (regcache, regnum, buf);
|
|
print_hex_chars (file, buf,
|
|
regcache->descr->sizeof_register[regnum],
|
|
gdbarch_byte_order (gdbarch));
|
|
}
|
|
}
|
|
|
|
/* Value, cooked. */
|
|
if (what_to_dump == regcache_dump_cooked)
|
|
{
|
|
if (regnum < 0)
|
|
fprintf_unfiltered (file, "Cooked value");
|
|
else
|
|
{
|
|
enum register_status status;
|
|
|
|
status = regcache_cooked_read (regcache, regnum, buf);
|
|
if (status == REG_UNKNOWN)
|
|
fprintf_unfiltered (file, "<invalid>");
|
|
else if (status == REG_UNAVAILABLE)
|
|
fprintf_unfiltered (file, "<unavailable>");
|
|
else
|
|
print_hex_chars (file, buf,
|
|
regcache->descr->sizeof_register[regnum],
|
|
gdbarch_byte_order (gdbarch));
|
|
}
|
|
}
|
|
|
|
/* Group members. */
|
|
if (what_to_dump == regcache_dump_groups)
|
|
{
|
|
if (regnum < 0)
|
|
fprintf_unfiltered (file, "Groups");
|
|
else
|
|
{
|
|
const char *sep = "";
|
|
struct reggroup *group;
|
|
|
|
for (group = reggroup_next (gdbarch, NULL);
|
|
group != NULL;
|
|
group = reggroup_next (gdbarch, group))
|
|
{
|
|
if (gdbarch_register_reggroup_p (gdbarch, regnum, group))
|
|
{
|
|
fprintf_unfiltered (file,
|
|
"%s%s", sep, reggroup_name (group));
|
|
sep = ",";
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Remote packet configuration. */
|
|
if (what_to_dump == regcache_dump_remote)
|
|
{
|
|
if (regnum < 0)
|
|
{
|
|
fprintf_unfiltered (file, "Rmt Nr g/G Offset");
|
|
}
|
|
else if (regnum < regcache->descr->nr_raw_registers)
|
|
{
|
|
int pnum, poffset;
|
|
|
|
if (remote_register_number_and_offset (get_regcache_arch (regcache), regnum,
|
|
&pnum, &poffset))
|
|
fprintf_unfiltered (file, "%7d %11d", pnum, poffset);
|
|
}
|
|
}
|
|
|
|
fprintf_unfiltered (file, "\n");
|
|
}
|
|
|
|
if (footnote_register_size)
|
|
fprintf_unfiltered (file, "*%d: Inconsistent register sizes.\n",
|
|
footnote_register_size);
|
|
if (footnote_register_offset)
|
|
fprintf_unfiltered (file, "*%d: Inconsistent register offsets.\n",
|
|
footnote_register_offset);
|
|
if (footnote_register_type_name_null)
|
|
fprintf_unfiltered (file,
|
|
"*%d: Register type's name NULL.\n",
|
|
footnote_register_type_name_null);
|
|
do_cleanups (cleanups);
|
|
}
|
|
|
|
static void
|
|
regcache_print (char *args, enum regcache_dump_what what_to_dump)
|
|
{
|
|
if (args == NULL)
|
|
regcache_dump (get_current_regcache (), gdb_stdout, what_to_dump);
|
|
else
|
|
{
|
|
struct cleanup *cleanups;
|
|
struct ui_file *file = gdb_fopen (args, "w");
|
|
|
|
if (file == NULL)
|
|
perror_with_name (_("maintenance print architecture"));
|
|
cleanups = make_cleanup_ui_file_delete (file);
|
|
regcache_dump (get_current_regcache (), file, what_to_dump);
|
|
do_cleanups (cleanups);
|
|
}
|
|
}
|
|
|
|
static void
|
|
maintenance_print_registers (char *args, int from_tty)
|
|
{
|
|
regcache_print (args, regcache_dump_none);
|
|
}
|
|
|
|
static void
|
|
maintenance_print_raw_registers (char *args, int from_tty)
|
|
{
|
|
regcache_print (args, regcache_dump_raw);
|
|
}
|
|
|
|
static void
|
|
maintenance_print_cooked_registers (char *args, int from_tty)
|
|
{
|
|
regcache_print (args, regcache_dump_cooked);
|
|
}
|
|
|
|
static void
|
|
maintenance_print_register_groups (char *args, int from_tty)
|
|
{
|
|
regcache_print (args, regcache_dump_groups);
|
|
}
|
|
|
|
static void
|
|
maintenance_print_remote_registers (char *args, int from_tty)
|
|
{
|
|
regcache_print (args, regcache_dump_remote);
|
|
}
|
|
|
|
extern initialize_file_ftype _initialize_regcache; /* -Wmissing-prototype */
|
|
|
|
void
|
|
_initialize_regcache (void)
|
|
{
|
|
regcache_descr_handle
|
|
= gdbarch_data_register_post_init (init_regcache_descr);
|
|
|
|
observer_attach_target_changed (regcache_observer_target_changed);
|
|
observer_attach_thread_ptid_changed (regcache_thread_ptid_changed);
|
|
|
|
add_com ("flushregs", class_maintenance, reg_flush_command,
|
|
_("Force gdb to flush its register cache (maintainer command)"));
|
|
|
|
add_cmd ("registers", class_maintenance, maintenance_print_registers,
|
|
_("Print the internal register configuration.\n"
|
|
"Takes an optional file parameter."), &maintenanceprintlist);
|
|
add_cmd ("raw-registers", class_maintenance,
|
|
maintenance_print_raw_registers,
|
|
_("Print the internal register configuration "
|
|
"including raw values.\n"
|
|
"Takes an optional file parameter."), &maintenanceprintlist);
|
|
add_cmd ("cooked-registers", class_maintenance,
|
|
maintenance_print_cooked_registers,
|
|
_("Print the internal register configuration "
|
|
"including cooked values.\n"
|
|
"Takes an optional file parameter."), &maintenanceprintlist);
|
|
add_cmd ("register-groups", class_maintenance,
|
|
maintenance_print_register_groups,
|
|
_("Print the internal register configuration "
|
|
"including each register's group.\n"
|
|
"Takes an optional file parameter."),
|
|
&maintenanceprintlist);
|
|
add_cmd ("remote-registers", class_maintenance,
|
|
maintenance_print_remote_registers, _("\
|
|
Print the internal register configuration including each register's\n\
|
|
remote register number and buffer offset in the g/G packets.\n\
|
|
Takes an optional file parameter."),
|
|
&maintenanceprintlist);
|
|
|
|
}
|