mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2025-01-30 12:44:10 +08:00
6afcd2d416
The FPSIMD dump in signal frames and ptrace FPSIMD dump in the SVE context structure follows the target endianness, whereas the SVE dumps are endianness-independent (LE). Therefore, when the system is in BE mode, we need to reverse the bytes for the FPSIMD data. Given the V registers are larger than 64-bit, I've added a way for value bytes to be set, as opposed to passing a 64-bit fixed quantity. This fits nicely with the unwinding *_got_bytes function and makes the trad-frame more flexible and capable of saving larger registers. The memory for the bytes is allocated via the frame obstack, so it gets freed after we're done inspecting the frame. gdb/ChangeLog: 2020-12-10 Luis Machado <luis.machado@linaro.org> * aarch64-linux-tdep.c (aarch64_linux_restore_vreg) New function. (aarch64_linux_sigframe_init): Call aarch64_linux_restore_vreg. * aarch64-tdep.h (V_REGISTER_SIZE): Move to ... * arch/aarch64.h: ... here. * nat/aarch64-sve-linux-ptrace.c: Include endian.h. (aarch64_maybe_swab128): New function. (aarch64_sve_regs_copy_to_reg_buf) (aarch64_sve_regs_copy_from_reg_buf): Adjust FPSIMD entries. * trad-frame.c (trad_frame_reset_saved_regs): Initialize the data field. (TF_REG_VALUE_BYTES): New enum value. (trad_frame_value_bytes_p): New function. (trad_frame_set_value_bytes): New function. (trad_frame_set_reg_value_bytes): New function. (trad_frame_get_prev_register): Handle register values saved as bytes. * trad-frame.h (trad_frame_set_reg_value_bytes): New prototype. (struct trad_frame_saved_reg) <data>: New field. (trad_frame_set_value_bytes): New prototype. (trad_frame_value_bytes_p): New prototype.
150 lines
5.7 KiB
C
150 lines
5.7 KiB
C
/* Traditional frame unwind support, for GDB the GNU Debugger.
|
|
|
|
Copyright (C) 2003-2020 Free Software Foundation, Inc.
|
|
|
|
This file is part of GDB.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef TRAD_FRAME_H
|
|
#define TRAD_FRAME_H
|
|
|
|
#include "frame.h" /* For "struct frame_id". */
|
|
|
|
struct frame_info;
|
|
struct regcache_map_entry;
|
|
struct trad_frame_cache;
|
|
|
|
/* A simple, or traditional frame cache.
|
|
|
|
The entire cache is populated in a single pass and then generic
|
|
routines are used to extract the various cache values. */
|
|
|
|
struct trad_frame_cache *trad_frame_cache_zalloc (struct frame_info *);
|
|
|
|
/* This frame's ID. */
|
|
void trad_frame_set_id (struct trad_frame_cache *this_trad_cache,
|
|
struct frame_id this_id);
|
|
void trad_frame_get_id (struct trad_frame_cache *this_trad_cache,
|
|
struct frame_id *this_id);
|
|
void trad_frame_set_this_base (struct trad_frame_cache *this_trad_cache,
|
|
CORE_ADDR this_base);
|
|
CORE_ADDR trad_frame_get_this_base (struct trad_frame_cache *this_trad_cache);
|
|
|
|
void trad_frame_set_reg_realreg (struct trad_frame_cache *this_trad_cache,
|
|
int regnum, int realreg);
|
|
void trad_frame_set_reg_addr (struct trad_frame_cache *this_trad_cache,
|
|
int regnum, CORE_ADDR addr);
|
|
void trad_frame_set_reg_regmap (struct trad_frame_cache *this_trad_cache,
|
|
const struct regcache_map_entry *regmap,
|
|
CORE_ADDR addr, size_t size);
|
|
void trad_frame_set_reg_value (struct trad_frame_cache *this_cache,
|
|
int regnum, LONGEST val);
|
|
|
|
/* Given the cache in THIS_TRAD_CACHE, set the value of REGNUM to the bytes
|
|
contained in BYTES with size SIZE. */
|
|
void trad_frame_set_reg_value_bytes (struct trad_frame_cache *this_trad_cache,
|
|
int regnum, const gdb_byte *bytes,
|
|
size_t size);
|
|
|
|
struct value *trad_frame_get_register (struct trad_frame_cache *this_trad_cache,
|
|
struct frame_info *this_frame,
|
|
int regnum);
|
|
|
|
/* A traditional saved regs table, indexed by REGNUM, encoding where
|
|
the value of REGNUM for the previous frame can be found in this
|
|
frame.
|
|
|
|
The table is initialized with an identity encoding (ADDR == -1,
|
|
REALREG == REGNUM) indicating that the value of REGNUM in the
|
|
previous frame can be found in register REGNUM (== REALREG) in this
|
|
frame.
|
|
|
|
The initial encoding can then be changed:
|
|
|
|
Modify ADDR (REALREG >= 0, ADDR != -1) to indicate that the value
|
|
of register REGNUM in the previous frame can be found in memory at
|
|
ADDR in this frame (addr_p, !realreg_p, !value_p).
|
|
|
|
Modify REALREG (REALREG >= 0, ADDR == -1) to indicate that the
|
|
value of register REGNUM in the previous frame is found in register
|
|
REALREG in this frame (!addr_p, realreg_p, !value_p).
|
|
|
|
Call trad_frame_set_value (REALREG == -1) to indicate that the
|
|
value of register REGNUM in the previous frame is found in ADDR
|
|
(!addr_p, !realreg_p, value_p).
|
|
|
|
Call trad_frame_set_unknown (REALREG == -2) to indicate that the
|
|
register's value is not known. */
|
|
|
|
struct trad_frame_saved_reg
|
|
{
|
|
LONGEST addr; /* A CORE_ADDR fits in a longest. */
|
|
int realreg;
|
|
/* Register data (for values that don't fit in ADDR). */
|
|
gdb_byte *data;
|
|
};
|
|
|
|
/* Encode REGNUM value in the trad-frame. */
|
|
void trad_frame_set_value (struct trad_frame_saved_reg this_saved_regs[],
|
|
int regnum, LONGEST val);
|
|
|
|
/* Encode REGNUM is in REALREG in the trad-frame. */
|
|
void trad_frame_set_realreg (struct trad_frame_saved_reg this_saved_regs[],
|
|
int regnum, int realreg);
|
|
|
|
/* Encode REGNUM is at address ADDR in the trad-frame. */
|
|
void trad_frame_set_addr (struct trad_frame_saved_reg this_trad_cache[],
|
|
int regnum, CORE_ADDR addr);
|
|
|
|
/* Mark REGNUM as unknown. */
|
|
void trad_frame_set_unknown (struct trad_frame_saved_reg this_saved_regs[],
|
|
int regnum);
|
|
|
|
/* Encode REGNUM value in the trad-frame as a sequence of bytes. This is
|
|
useful when the value is larger than what primitive types can hold. */
|
|
void trad_frame_set_value_bytes (struct trad_frame_saved_reg this_saved_regs[],
|
|
int regnum, const gdb_byte *bytes,
|
|
size_t size);
|
|
|
|
/* Convenience functions, return non-zero if the register has been
|
|
encoded as specified. */
|
|
int trad_frame_value_p (struct trad_frame_saved_reg this_saved_regs[],
|
|
int regnum);
|
|
int trad_frame_addr_p (struct trad_frame_saved_reg this_saved_regs[],
|
|
int regnum);
|
|
int trad_frame_realreg_p (struct trad_frame_saved_reg this_saved_regs[],
|
|
int regnum);
|
|
|
|
/* Return TRUE if REGNUM is stored as a sequence of bytes, and FALSE
|
|
otherwise. */
|
|
bool trad_frame_value_bytes_p (struct trad_frame_saved_reg this_saved_regs[],
|
|
int regnum);
|
|
|
|
/* Reset the save regs cache, setting register values to -1. */
|
|
void trad_frame_reset_saved_regs (struct gdbarch *gdbarch,
|
|
struct trad_frame_saved_reg *regs);
|
|
|
|
/* Return a freshly allocated (and initialized) trad_frame array. */
|
|
struct trad_frame_saved_reg *trad_frame_alloc_saved_regs (struct frame_info *);
|
|
struct trad_frame_saved_reg *trad_frame_alloc_saved_regs (struct gdbarch *);
|
|
|
|
/* Given the trad_frame info, return the location of the specified
|
|
register. */
|
|
struct value *trad_frame_get_prev_register (struct frame_info *this_frame,
|
|
struct trad_frame_saved_reg this_saved_regs[],
|
|
int regnum);
|
|
|
|
#endif
|