riscv-gnu-toolchain/gdb.git - Unnamed repository; edit this file 'description' to name the repository.

Age	Commit message (Expand)	Author	Files	Lines
2002-12-20	2002-12-20 Jeff Johnston <jjohnstn@redhat.com>	Jeff Johnston	1	-15/+299
2002-12-13	2002-12-12 Jeff Johnston <jjohnstn@redhat.com>	Jeff Johnston	1	-1/+176
2002-09-10	2002-09-10 Jeff Johnston <jjohnstn@redhat.com>	Jeff Johnston	1	-1/+28
2002-09-09	2002-09-09 Jeff Johnston <jjohnstn@redhat.com>	Jeff Johnston	1	-2/+16
2002-02-05	2002-02-04 Jeff Johnston <jjohnstn@redhat.com>	Jeff Johnston	1	-13/+26
2002-01-07	2002-01-07 Jeff Johnston <jjohnstn@redhat.com>	Jeff Johnston	1	-1/+1
2002-01-07	2002-01-07 Jeff Johnston <jjohnstn@redhat.com>	Jeff Johnston	1	-1/+1
2001-11-18	* COPYING.NEWLIB: Mention preserved notice in specific parts.	Hans-Peter Nilsson	1	-1/+2
2001-11-12	2001-11-12 Hans-Peter Nilsson <hp@bitrange.com>	Jeff Johnston	1	-1/+13
2001-02-22	2001-02-22 Jeff Johnston <jjohnstn@redhat.com>	Jeff Johnston	1	-2/+3
2001-01-15	2001-01-15 Jeff Johnston <jjohnstn@redhat.com>	Jeff Johnston	1	-0/+130

/* Cache and manage the values of registers for GDB, the GNU debugger. Copyright (C) 1986, 1987, 1989, 1991, 1994, 1995, 1996, 1998, 2000, 2001, 2002, 2004, 2007, 2008, 2009, 2010 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/>. */ #include "defs.h" #include "inferior.h" #include "target.h" #include "gdbarch.h" #include "gdbcmd.h" #include "regcache.h" #include "reggroups.h" #include "gdb_assert.h" #include "gdb_string.h" #include "gdbcmd.h" /* For maintenanceprintlist. */ #include "observer.h" /* * DATA STRUCTURE * * Here is the actual register cache. */ /* Per-architecture object describing the layout of a register cache. Computed once when the architecture is created */ struct gdbarch_data *regcache_descr_handle; struct regcache_descr { /* The architecture this descriptor belongs to. */ struct gdbarch *gdbarch; /* The raw register cache. Each raw (or hard) register is supplied by the target interface. The raw cache should not contain redundant information - if the PC is constructed from two registers then those registers and not the PC lives in the raw cache. */ int nr_raw_registers; long sizeof_raw_registers; long sizeof_raw_register_valid_p; /* The cooked register space. Each cooked register in the range [0..NR_RAW_REGISTERS) is direct-mapped onto the corresponding raw register. The remaining [NR_RAW_REGISTERS .. NR_COOKED_REGISTERS) (a.k.a. pseudo registers) are mapped onto both raw registers and memory by the architecture methods gdbarch_pseudo_register_read and gdbarch_pseudo_register_write. */ int nr_cooked_registers; long sizeof_cooked_registers; long sizeof_cooked_register_valid_p; /* Offset and size (in 8 bit bytes), of reach register in the register cache. All registers (including those in the range [NR_RAW_REGISTERS .. NR_COOKED_REGISTERS) are given an offset. Assigning all registers an offset makes it possible to keep legacy code, such as that found in read_register_bytes() and write_register_bytes() working. */ long *register_offset; long *sizeof_register; /* Cached table containing the type of each register. */ struct type **register_type; }; static void * init_regcache_descr (struct gdbarch *gdbarch) { int i; struct regcache_descr *descr; gdb_assert (gdbarch != NULL); /* Create an initial, zero filled, table. */ descr = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct regcache_descr); descr->gdbarch = gdbarch; /* Total size of the register space. The raw registers are mapped directly onto the raw register cache while the pseudo's are either mapped onto raw-registers or memory. */ descr->nr_cooked_registers = gdbarch_num_regs (gdbarch) + gdbarch_num_pseudo_regs (gdbarch); descr->sizeof_cooked_register_valid_p = gdbarch_num_regs (gdbarch) + gdbarch_num_pseudo_regs (gdbarch); /* Fill in a table of register types. */ descr->register_type = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, struct type *); for (i = 0; i < descr->nr_cooked_registers; i++) descr->register_type[i] = gdbarch_register_type (gdbarch, i); /* Construct a strictly RAW register cache. Don't allow pseudo's into the register cache. */ descr->nr_raw_registers = gdbarch_num_regs (gdbarch); /* FIXME: cagney/2002-08-13: Overallocate the register_valid_p array. This pretects GDB from erant code that accesses elements of the global register_valid_p[] array in the range [gdbarch_num_regs .. gdbarch_num_regs + gdbarch_num_pseudo_regs). */ descr->sizeof_raw_register_valid_p = descr->sizeof_cooked_register_valid_p; /* Lay out the register cache. NOTE: cagney/2002-05-22: Only register_type() is used when constructing the register cache. It is assumed that the register's raw size, virtual size and type length are all the same. */ { long offset = 0; descr->sizeof_register = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, long); descr->register_offset = GDBARCH_OBSTACK_CALLOC (gdbarch, descr->nr_cooked_registers, long); for (i = 0; i < descr->nr_cooked_registers; i++) { descr->sizeof_register[i] = TYPE_LENGTH (descr->register_type[i]); descr->register_offset[i] = offset; offset += descr->sizeof_register[i]; gdb_assert (MAX_REGISTER_SIZE >= descr->sizeof_register[i]); } /* Set the real size of the register cache buffer. */ descr->sizeof_cooked_registers = offset; } /* FIXME: cagney/2002-05-22: Should only need to allocate space for the raw registers. Unfortunately some code still accesses the register array directly using the global registers[]. Until that code has been purged, play safe and over allocating the register buffer. Ulgh! */ descr->sizeof_raw_registers = descr->sizeof_cooked_registers; return descr; } static struct regcache_descr * regcache_descr (struct gdbarch *gdbarch) { return gdbarch_data (gdbarch, regcache_descr_handle); } /* Utility functions returning useful register attributes stored in the regcache descr. */ struct type * register_type (struct gdbarch *gdbarch, int regnum) { struct regcache_descr *descr = regcache_descr (gdbarch); gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); return descr->register_type[regnum]; } /* Utility functions returning useful register attributes stored in the regcache descr. */ int register_size (struct gdbarch *gdbarch, int regnum) { struct regcache_descr *descr = regcache_descr (gdbarch); int size; gdb_assert (regnum >= 0 && regnum < (gdbarch_num_regs (gdbarch) + gdbarch_num_pseudo_regs (gdbarch))); size = descr->sizeof_register[regnum]; return size; } /* The register cache for storing raw register values. */ struct regcache { struct regcache_descr *descr; /* The address space of this register cache (for registers where it makes sense, like PC or SP). */ struct address_space *aspace; /* The register buffers. A read-only register cache can hold the full [0 .. gdbarch_num_regs + gdbarch_num_pseudo_regs) while a read/write register cache can only hold [0 .. gdbarch_num_regs). */ gdb_byte *registers; /* Register cache status: register_valid_p[REG] == 0 if REG value is not in the cache > 0 if REG value is in the cache < 0 if REG value is permanently unavailable */ signed char *register_valid_p; /* Is this a read-only cache? A read-only cache is used for saving the target's register state (e.g, across an inferior function call or just before forcing a function return). A read-only cache can only be updated via the methods regcache_dup() and regcache_cpy(). The actual contents are determined by the reggroup_save and reggroup_restore methods. */ int readonly_p; /* If this is a read-write cache, which thread's registers is it connected to? */ ptid_t ptid; }; struct regcache * regcache_xmalloc (struct gdbarch *gdbarch, struct address_space *aspace) { struct regcache_descr *descr; struct regcache *regcache; gdb_assert (gdbarch != NULL); descr = regcache_descr (gdbarch); regcache = XMALLOC (struct regcache); regcache->descr = descr; regcache->registers = XCALLOC (descr->sizeof_raw_registers, gdb_byte); regcache->register_valid_p = XCALLOC (descr->sizeof_raw_register_valid_p, gdb_byte); regcache->aspace = aspace; regcache->readonly_p = 1; regcache->ptid = minus_one_ptid; return regcache; } void regcache_xfree (struct regcache *regcache) { if (regcache == NULL) return; xfree (regcache->registers); xfree (regcache->register_valid_p); xfree (regcache); } static void do_regcache_xfree (void *data) { regcache_xfree (data); } struct cleanup * make_cleanup_regcache_xfree (struct regcache *regcache) { return make_cleanup (do_regcache_xfree, regcache); } /* Return REGCACHE's architecture. */ struct gdbarch * get_regcache_arch (const struct regcache *regcache) { return regcache->descr->gdbarch; } struct address_space * get_regcache_aspace (const struct regcache *regcache) { return regcache->aspace; } /* Return a pointer to register REGNUM's buffer cache. */ static gdb_byte * register_buffer (const struct regcache *regcache, int regnum) { return regcache->registers + regcache->descr->register_offset[regnum]; } void regcache_save (struct regcache *dst, regcache_cooked_read_ftype *cooked_read, void *src) { struct gdbarch *gdbarch = dst->descr->gdbarch; gdb_byte buf[MAX_REGISTER_SIZE]; int regnum; /* The DST should be `read-only', if it wasn't then the save would end up trying to write the register values back out to the target. */ gdb_assert (dst->readonly_p); /* Clear the dest. */ memset (dst->registers, 0, dst->descr->sizeof_cooked_registers); memset (dst->register_valid_p, 0, dst->descr->sizeof_cooked_register_valid_p); /* Copy over any registers (identified by their membership in the save_reggroup) and mark them as valid. The full [0 .. gdbarch_num_regs + gdbarch_num_pseudo_regs) range is checked since some architectures need to save/restore `cooked' registers that live in memory. */ for (regnum = 0; regnum < dst->descr->nr_cooked_registers; regnum++) { if (gdbarch_register_reggroup_p (gdbarch, regnum, save_reggroup)) { int valid = cooked_read (src, regnum, buf); if (valid) { memcpy (register_buffer (dst, regnum), buf, register_size (gdbarch, regnum)); dst->register_valid_p[regnum] = 1; } } } } void regcache_restore (struct regcache *dst, regcache_cooked_read_ftype *cooked_read, void *cooked_read_context) { struct gdbarch *gdbarch = dst->descr->gdbarch; gdb_byte buf[MAX_REGISTER_SIZE]; int regnum; /* The dst had better not be read-only. If it is, the `restore' doesn't make much sense. */ gdb_assert (!dst->readonly_p); /* Copy over any registers, being careful to only restore those that were both saved and need to be restored. The full [0 .. gdbarch_num_regs + gdbarch_num_pseudo_regs) range is checked since some architectures need to save/restore `cooked' registers that live in memory. */ for (regnum = 0; regnum < dst->descr->nr_cooked_registers; regnum++) { if (gdbarch_register_reggroup_p (gdbarch, regnum, restore_reggroup)) { int valid = cooked_read (cooked_read_context, regnum, buf); if (valid) regcache_cooked_write (dst, regnum, buf); } } } static int do_cooked_read (void *src, int regnum, gdb_byte *buf) { struct regcache *regcache = src; if (!regcache->register_valid_p[regnum] && regcache->readonly_p) /* Don't even think about fetching a register from a read-only cache when the register isn't yet valid. There isn't a target from which the register value can be fetched. */ return 0; regcache_cooked_read (regcache, regnum, buf); return 1; } void regcache_cpy (struct regcache *dst, struct regcache *src) { gdb_assert (src != NULL && dst != NULL); gdb_assert (src->descr->gdbarch == dst->descr->gdbarch); gdb_assert (src != dst); gdb_assert (src->readonly_p || dst->readonly_p); if (!src->readonly_p) regcache_save (dst, do_cooked_read, src); else if (!dst->readonly_p) regcache_restore (dst, do_cooked_read, src); else regcache_cpy_no_passthrough (dst, src); } void regcache_cpy_no_passthrough (struct regcache *dst, struct regcache *src) { gdb_assert (src != NULL && dst != NULL); gdb_assert (src->descr->gdbarch == dst->descr->gdbarch); /* NOTE: cagney/2002-05-17: Don't let the caller do a no-passthrough move of data into the current regcache. Doing this would be silly - it would mean that valid_p would be completely invalid. */ gdb_assert (dst->readonly_p); memcpy (dst->registers, src->registers, dst->descr->sizeof_raw_registers); memcpy (dst->register_valid_p, src->register_valid_p, dst->descr->sizeof_raw_register_valid_p); } struct regcache * regcache_dup (struct regcache *src) { struct regcache *newbuf; newbuf = regcache_xmalloc (src->descr->gdbarch, get_regcache_aspace (src)); regcache_cpy (newbuf, src); return newbuf; } struct regcache * regcache_dup_no_passthrough (struct regcache *src) { struct regcache *newbuf; newbuf = regcache_xmalloc (src->descr->gdbarch, get_regcache_aspace (src)); regcache_cpy_no_passthrough (newbuf, src); return newbuf; } int regcache_valid_p (const struct regcache *regcache, int regnum) { gdb_assert (regcache != NULL); gdb_assert (regnum >= 0); if (regcache->readonly_p) gdb_assert (regnum < regcache->descr->nr_cooked_registers); else gdb_assert (regnum < regcache->descr->nr_raw_registers); return regcache->register_valid_p[regnum]; } void regcache_invalidate (struct regcache *regcache, int regnum) { gdb_assert (regcache != NULL); gdb_assert (regnum >= 0); gdb_assert (!regcache->readonly_p); gdb_assert (regnum < regcache->descr->nr_raw_registers); regcache->register_valid_p[regnum] = 0; } /* Global structure containing the current regcache. */ /* NOTE: this is a write-through cache. There is no "dirty" bit for recording if the register values have been changed (eg. by the user). Therefore all registers must be written back to the target when appropriate. */ struct regcache_list { struct regcache *regcache; struct regcache_list *next; }; static struct regcache_list *current_regcache; struct regcache * get_thread_arch_regcache (ptid_t ptid, struct gdbarch *gdbarch) { struct regcache_list *list; struct regcache *new_regcache; for (list = current_regcache; list; list = list->next) if (ptid_equal (list->regcache->ptid, ptid) && get_regcache_arch (list->regcache) == gdbarch) return list->regcache; new_regcache = regcache_xmalloc (gdbarch, target_thread_address_space (ptid)); new_regcache->readonly_p = 0; new_regcache->ptid = ptid; gdb_assert (new_regcache->aspace != NULL); list = xmalloc (sizeof (struct regcache_list)); list->regcache = new_regcache; list->next = current_regcache; current_regcache = list; return new_regcache; } 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); } /* 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 = &current_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; } current_regcache = NULL; current_thread_ptid = null_ptid; current_thread_arch = NULL; /* Need to forget about any frames we have cached, too. */ reinit_frame_cache (); /* 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); } void registers_changed (void) { registers_changed_ptid (minus_one_ptid); } void 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) { if (!regcache_valid_p (regcache, regnum)) { struct cleanup *old_chain = save_inferior_ptid (); inferior_ptid = regcache->ptid; target_fetch_registers (regcache, regnum); do_cleanups (old_chain); } #if 0 /* FIXME: cagney/2004-08-07: At present a number of targets forget (or didn't know that they needed) to set this leading to panics. Also is the problem that targets need to indicate that a register is in one of the possible states: valid, undefined, unknown. The last of which isn't yet possible. */ gdb_assert (regcache_valid_p (regcache, regnum)); #endif } /* Copy the value directly into the register cache. */ memcpy (buf, register_buffer (regcache, regnum), regcache->descr->sizeof_register[regnum]); } void regcache_raw_read_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 = alloca (regcache->descr->sizeof_register[regnum]); regcache_raw_read (regcache, regnum, buf); (*val) = extract_signed_integer (buf, regcache->descr->sizeof_register[regnum], gdbarch_byte_order (regcache->descr->gdbarch)); } void regcache_raw_read_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 = alloca (regcache->descr->sizeof_register[regnum]); regcache_raw_read (regcache, regnum, buf); (*val) = extract_unsigned_integer (buf, regcache->descr->sizeof_register[regnum], gdbarch_byte_order (regcache->descr->gdbarch)); } void regcache_raw_write_signed (struct regcache *regcache, int regnum, LONGEST val) { void *buf; gdb_assert (regcache != NULL); gdb_assert (regnum >=0 && regnum < regcache->descr->nr_raw_registers); buf = 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) { void *buf; gdb_assert (regcache != NULL); gdb_assert (regnum >=0 && regnum < regcache->descr->nr_raw_registers); buf = 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); } void 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) regcache_raw_read (regcache, regnum, buf); else if (regcache->readonly_p && regnum < regcache->descr->nr_cooked_registers && regcache->register_valid_p[regnum]) /* Read-only register cache, perhaps the cooked value was cached? */ memcpy (buf, register_buffer (regcache, regnum), regcache->descr->sizeof_register[regnum]); else gdbarch_pseudo_register_read (regcache->descr->gdbarch, regcache, regnum, buf); } void regcache_cooked_read_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 = alloca (regcache->descr->sizeof_register[regnum]); regcache_cooked_read (regcache, regnum, buf); (*val) = extract_signed_integer (buf, regcache->descr->sizeof_register[regnum], gdbarch_byte_order (regcache->descr->gdbarch)); } void regcache_cooked_read_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 = alloca (regcache->descr->sizeof_register[regnum]); regcache_cooked_read (regcache, regnum, buf); (*val) = extract_unsigned_integer (buf, regcache->descr->sizeof_register[regnum], gdbarch_byte_order (regcache->descr->gdbarch)); } void regcache_cooked_write_signed (struct regcache *regcache, int regnum, LONGEST val) { void *buf; gdb_assert (regcache != NULL); gdb_assert (regnum >=0 && regnum < regcache->descr->nr_cooked_registers); buf = 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) { void *buf; gdb_assert (regcache != NULL); gdb_assert (regnum >=0 && regnum < regcache->descr->nr_cooked_registers); buf = 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 *old_chain; 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_valid_p (regcache, regnum) && (memcmp (register_buffer (regcache, regnum), buf, regcache->descr->sizeof_register[regnum]) == 0)) return; old_chain = 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_valid_p[regnum] = 1; target_store_registers (regcache, regnum); do_cleanups (old_chain); } 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 void regcache_xfer_part (struct regcache *regcache, int regnum, int offset, int len, void *in, const void *out, void (*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; /* Read (when needed) ... */ if (in != NULL || offset > 0 || offset + len < descr->sizeof_register[regnum]) { gdb_assert (read != NULL); read (regcache, regnum, reg); } /* ... 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); } } void 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); 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); } void 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); 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); else memset (regbuf, 0, size); /* Mark the register as cached. */ regcache->register_valid_p[regnum] = 1; } /* 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); } /* 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; regcache_cooked_read_unsigned (regcache, gdbarch_pc_regnum (gdbarch), &raw_val); 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")); } static void dump_endian_bytes (struct ui_file *file, enum bfd_endian endian, const unsigned char *buf, long len) { int i; switch (endian) { case BFD_ENDIAN_BIG: for (i = 0; i < len; i++) fprintf_unfiltered (file, "%02x", buf[i]); break; case BFD_ENDIAN_LITTLE: for (i = len - 1; i >= 0; i--) fprintf_unfiltered (file, "%02x", buf[i]); break; default: internal_error (__FILE__, __LINE__, _("Bad switch")); } } enum regcache_dump_what { regcache_dump_none, regcache_dump_raw, regcache_dump_cooked, regcache_dump_groups }; 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; unsigned char 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_valid_p %ld\n", regcache->descr->sizeof_raw_register_valid_p); 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 (strncmp (t, blt, strlen (blt)) == 0) 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_valid_p (regcache, regnum)) fprintf_unfiltered (file, "<invalid>"); else { regcache_raw_read (regcache, regnum, buf); fprintf_unfiltered (file, "0x"); dump_endian_bytes (file, gdbarch_byte_order (gdbarch), buf, regcache->descr->sizeof_register[regnum]); } } /* Value, cooked. */ if (what_to_dump == regcache_dump_cooked) { if (regnum < 0) fprintf_unfiltered (file, "Cooked value"); else { regcache_cooked_read (regcache, regnum, buf); fprintf_unfiltered (file, "0x"); dump_endian_bytes (file, gdbarch_byte_order (gdbarch), buf, regcache->descr->sizeof_register[regnum]); } } /* 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 = ","; } } } } 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); } 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); }