2010-12-29 17:11:49 +01:00
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/* Target-dependent code for Analog Devices Blackfin processor, for GDB.
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2012-01-04 09:17:56 +01:00
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Copyright (C) 2005-2012 Free Software Foundation, Inc.
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2010-12-29 17:11:49 +01:00
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Contributed by Analog Devices, 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 "gdb_string.h"
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#include "inferior.h"
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#include "gdbcore.h"
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#include "arch-utils.h"
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#include "regcache.h"
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#include "frame.h"
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#include "frame-unwind.h"
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#include "frame-base.h"
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#include "trad-frame.h"
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#include "dis-asm.h"
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#include "gdb_assert.h"
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2011-03-06 01:22:38 +01:00
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#include "sim-regno.h"
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#include "gdb/sim-bfin.h"
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2010-12-29 17:11:49 +01:00
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#include "dwarf2-frame.h"
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#include "symtab.h"
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#include "elf-bfd.h"
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#include "elf/bfin.h"
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#include "osabi.h"
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#include "infcall.h"
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#include "xml-syscall.h"
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#include "bfin-tdep.h"
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/* Macros used by prologue functions. */
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#define P_LINKAGE 0xE800
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#define P_MINUS_SP1 0x0140
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#define P_MINUS_SP2 0x05C0
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#define P_MINUS_SP3 0x0540
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#define P_MINUS_SP4 0x04C0
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#define P_SP_PLUS 0x6C06
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#define P_P2_LOW 0xE10A
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#define P_P2_HIGH 0XE14A
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#define P_SP_EQ_SP_PLUS_P2 0X5BB2
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#define P_SP_EQ_P2_PLUS_SP 0x5B96
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#define P_MINUS_MINUS_SP_EQ_RETS 0x0167
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/* Macros used for program flow control. */
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/* 16 bit instruction, max */
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#define P_16_BIT_INSR_MAX 0xBFFF
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/* 32 bit instruction, min */
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#define P_32_BIT_INSR_MIN 0xC000
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/* 32 bit instruction, max */
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#define P_32_BIT_INSR_MAX 0xE801
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/* jump (preg), 16-bit, min */
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#define P_JUMP_PREG_MIN 0x0050
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/* jump (preg), 16-bit, max */
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#define P_JUMP_PREG_MAX 0x0057
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/* jump (pc+preg), 16-bit, min */
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#define P_JUMP_PC_PLUS_PREG_MIN 0x0080
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/* jump (pc+preg), 16-bit, max */
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#define P_JUMP_PC_PLUS_PREG_MAX 0x0087
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/* jump.s pcrel13m2, 16-bit, min */
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#define P_JUMP_S_MIN 0x2000
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/* jump.s pcrel13m2, 16-bit, max */
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#define P_JUMP_S_MAX 0x2FFF
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/* jump.l pcrel25m2, 32-bit, min */
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#define P_JUMP_L_MIN 0xE200
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/* jump.l pcrel25m2, 32-bit, max */
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#define P_JUMP_L_MAX 0xE2FF
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/* conditional jump pcrel11m2, 16-bit, min */
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#define P_IF_CC_JUMP_MIN 0x1800
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/* conditional jump pcrel11m2, 16-bit, max */
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#define P_IF_CC_JUMP_MAX 0x1BFF
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/* conditional jump(bp) pcrel11m2, 16-bit, min */
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#define P_IF_CC_JUMP_BP_MIN 0x1C00
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/* conditional jump(bp) pcrel11m2, 16-bit, max */
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#define P_IF_CC_JUMP_BP_MAX 0x1FFF
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/* conditional !jump pcrel11m2, 16-bit, min */
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#define P_IF_NOT_CC_JUMP_MIN 0x1000
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/* conditional !jump pcrel11m2, 16-bit, max */
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#define P_IF_NOT_CC_JUMP_MAX 0x13FF
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/* conditional jump(bp) pcrel11m2, 16-bit, min */
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#define P_IF_NOT_CC_JUMP_BP_MIN 0x1400
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/* conditional jump(bp) pcrel11m2, 16-bit, max */
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#define P_IF_NOT_CC_JUMP_BP_MAX 0x17FF
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/* call (preg), 16-bit, min */
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#define P_CALL_PREG_MIN 0x0060
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/* call (preg), 16-bit, max */
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#define P_CALL_PREG_MAX 0x0067
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/* call (pc+preg), 16-bit, min */
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#define P_CALL_PC_PLUS_PREG_MIN 0x0070
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/* call (pc+preg), 16-bit, max */
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#define P_CALL_PC_PLUS_PREG_MAX 0x0077
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/* call pcrel25m2, 32-bit, min */
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#define P_CALL_MIN 0xE300
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/* call pcrel25m2, 32-bit, max */
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#define P_CALL_MAX 0xE3FF
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/* RTS */
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#define P_RTS 0x0010
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/* MNOP */
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#define P_MNOP 0xC803
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/* EXCPT, 16-bit, min */
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#define P_EXCPT_MIN 0x00A0
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/* EXCPT, 16-bit, max */
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#define P_EXCPT_MAX 0x00AF
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/* multi instruction mask 1, 16-bit */
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#define P_BIT_MULTI_INS_1 0xC000
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/* multi instruction mask 2, 16-bit */
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#define P_BIT_MULTI_INS_2 0x0800
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/* The maximum bytes we search to skip the prologue. */
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#define UPPER_LIMIT 40
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/* ASTAT bits */
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#define ASTAT_CC_POS 5
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#define ASTAT_CC (1 << ASTAT_CC_POS)
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/* Initial value: Register names used in BFIN's ISA documentation. */
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static const char * const bfin_register_name_strings[] =
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{
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"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
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"p0", "p1", "p2", "p3", "p4", "p5", "sp", "fp",
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"i0", "i1", "i2", "i3", "m0", "m1", "m2", "m3",
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"b0", "b1", "b2", "b3", "l0", "l1", "l2", "l3",
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"a0x", "a0w", "a1x", "a1w", "astat", "rets",
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"lc0", "lt0", "lb0", "lc1", "lt1", "lb1", "cycles", "cycles2",
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"usp", "seqstat", "syscfg", "reti", "retx", "retn", "rete",
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"pc", "cc",
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};
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#define NUM_BFIN_REGNAMES ARRAY_SIZE (bfin_register_name_strings)
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/* In this diagram successive memory locations increase downwards or the
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stack grows upwards with negative indices. (PUSH analogy for stack.)
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The top frame is the "frame" of the current function being executed.
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+--------------+ SP -
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| local vars | ^
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+--------------+ |
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| save regs | |
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+--------------+ FP |
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| old FP -|-- top
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+--------------+ | frame
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| RETS | | |
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+--------------+ | |
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| param 1 | | |
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| param 2 | | |
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| ... | | V
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+--------------+ | -
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| local vars | | ^
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+--------------+ | |
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| save regs | | |
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+--------------+<- |
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| old FP -|-- next
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+--------------+ | frame
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| RETS | | |
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+--------------+ | |
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| param 1 | | |
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| param 2 | | |
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| ... | | V
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+--------------+ | -
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| local vars | | ^
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+--------------+ | |
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| save regs | | |
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+--------------+<- next frame
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| old FP | |
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+--------------+ |
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| RETS | V
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+--------------+ -
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The frame chain is formed as following:
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FP has the topmost frame.
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FP + 4 has the previous FP and so on. */
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/* Map from DWARF2 register number to GDB register number. */
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static const int map_gcc_gdb[] =
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{
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BFIN_R0_REGNUM,
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BFIN_R1_REGNUM,
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BFIN_R2_REGNUM,
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BFIN_R3_REGNUM,
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BFIN_R4_REGNUM,
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BFIN_R5_REGNUM,
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BFIN_R6_REGNUM,
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BFIN_R7_REGNUM,
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BFIN_P0_REGNUM,
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BFIN_P1_REGNUM,
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BFIN_P2_REGNUM,
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BFIN_P3_REGNUM,
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BFIN_P4_REGNUM,
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BFIN_P5_REGNUM,
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BFIN_SP_REGNUM,
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BFIN_FP_REGNUM,
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BFIN_I0_REGNUM,
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BFIN_I1_REGNUM,
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BFIN_I2_REGNUM,
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BFIN_I3_REGNUM,
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BFIN_B0_REGNUM,
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BFIN_B1_REGNUM,
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BFIN_B2_REGNUM,
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BFIN_B3_REGNUM,
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BFIN_L0_REGNUM,
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BFIN_L1_REGNUM,
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BFIN_L2_REGNUM,
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BFIN_L3_REGNUM,
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BFIN_M0_REGNUM,
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BFIN_M1_REGNUM,
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BFIN_M2_REGNUM,
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BFIN_M3_REGNUM,
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BFIN_A0_DOT_X_REGNUM,
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BFIN_A1_DOT_X_REGNUM,
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BFIN_CC_REGNUM,
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BFIN_RETS_REGNUM,
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BFIN_RETI_REGNUM,
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BFIN_RETX_REGNUM,
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BFIN_RETN_REGNUM,
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BFIN_RETE_REGNUM,
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BFIN_ASTAT_REGNUM,
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BFIN_SEQSTAT_REGNUM,
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BFIN_USP_REGNUM,
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BFIN_LT0_REGNUM,
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BFIN_LT1_REGNUM,
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BFIN_LC0_REGNUM,
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BFIN_LC1_REGNUM,
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BFIN_LB0_REGNUM,
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BFIN_LB1_REGNUM
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};
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struct bfin_frame_cache
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{
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/* Base address. */
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CORE_ADDR base;
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CORE_ADDR sp_offset;
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CORE_ADDR pc;
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int frameless_pc_value;
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/* Saved registers. */
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CORE_ADDR saved_regs[BFIN_NUM_REGS];
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CORE_ADDR saved_sp;
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/* Stack space reserved for local variables. */
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long locals;
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};
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/* Allocate and initialize a frame cache. */
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static struct bfin_frame_cache *
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bfin_alloc_frame_cache (void)
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{
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struct bfin_frame_cache *cache;
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int i;
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cache = FRAME_OBSTACK_ZALLOC (struct bfin_frame_cache);
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/* Base address. */
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cache->base = 0;
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cache->sp_offset = -4;
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cache->pc = 0;
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cache->frameless_pc_value = 0;
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/* Saved registers. We initialize these to -1 since zero is a valid
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offset (that's where fp is supposed to be stored). */
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for (i = 0; i < BFIN_NUM_REGS; i++)
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cache->saved_regs[i] = -1;
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/* Frameless until proven otherwise. */
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cache->locals = -1;
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return cache;
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}
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static struct bfin_frame_cache *
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bfin_frame_cache (struct frame_info *this_frame, void **this_cache)
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{
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struct bfin_frame_cache *cache;
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int i;
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if (*this_cache)
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return *this_cache;
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cache = bfin_alloc_frame_cache ();
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*this_cache = cache;
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cache->base = get_frame_register_unsigned (this_frame, BFIN_FP_REGNUM);
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if (cache->base == 0)
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return cache;
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/* For normal frames, PC is stored at [FP + 4]. */
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cache->saved_regs[BFIN_PC_REGNUM] = 4;
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cache->saved_regs[BFIN_FP_REGNUM] = 0;
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/* Adjust all the saved registers such that they contain addresses
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instead of offsets. */
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for (i = 0; i < BFIN_NUM_REGS; i++)
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if (cache->saved_regs[i] != -1)
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cache->saved_regs[i] += cache->base;
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cache->pc = get_frame_func (this_frame) ;
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if (cache->pc == 0 || cache->pc == get_frame_pc (this_frame))
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{
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/* Either there is no prologue (frameless function) or we are at
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the start of a function. In short we do not have a frame.
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PC is stored in rets register. FP points to previous frame. */
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cache->saved_regs[BFIN_PC_REGNUM] =
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get_frame_register_unsigned (this_frame, BFIN_RETS_REGNUM);
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cache->frameless_pc_value = 1;
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cache->base = get_frame_register_unsigned (this_frame, BFIN_FP_REGNUM);
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cache->saved_regs[BFIN_FP_REGNUM] = cache->base;
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cache->saved_sp = cache->base;
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}
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else
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{
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cache->frameless_pc_value = 0;
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/* Now that we have the base address for the stack frame we can
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calculate the value of SP in the calling frame. */
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cache->saved_sp = cache->base + 8;
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}
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return cache;
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}
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static void
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bfin_frame_this_id (struct frame_info *this_frame,
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void **this_cache,
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struct frame_id *this_id)
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{
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struct bfin_frame_cache *cache = bfin_frame_cache (this_frame, this_cache);
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/* This marks the outermost frame. */
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if (cache->base == 0)
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|
|
return;
|
|
|
|
|
|
|
|
/* See the end of bfin_push_dummy_call. */
|
|
|
|
*this_id = frame_id_build (cache->base + 8, cache->pc);
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct value *
|
|
|
|
bfin_frame_prev_register (struct frame_info *this_frame,
|
|
|
|
void **this_cache,
|
|
|
|
int regnum)
|
|
|
|
{
|
|
|
|
struct gdbarch *gdbarch = get_frame_arch (this_frame);
|
|
|
|
struct bfin_frame_cache *cache = bfin_frame_cache (this_frame, this_cache);
|
|
|
|
|
|
|
|
if (regnum == gdbarch_sp_regnum (gdbarch) && cache->saved_sp)
|
|
|
|
return frame_unwind_got_constant (this_frame, regnum, cache->saved_sp);
|
|
|
|
|
|
|
|
if (regnum < BFIN_NUM_REGS && cache->saved_regs[regnum] != -1)
|
|
|
|
return frame_unwind_got_memory (this_frame, regnum,
|
|
|
|
cache->saved_regs[regnum]);
|
|
|
|
|
|
|
|
return frame_unwind_got_register (this_frame, regnum, regnum);
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct frame_unwind bfin_frame_unwind =
|
|
|
|
{
|
|
|
|
NORMAL_FRAME,
|
gdb/
* frame.c (frame_unwind_register): Throw an error if unwinding the
register failed.
* get_prev_frame_1 (get_prev_frame_1): Ask the unwinder if there's
an unwind stop reason.
(frame_stop_reason_string): Handle UNWIND_UNAVAILABLE.
* frame.h (enum unwind_stop_reason) <UNWIND_OUTERMOST,
UNWIND_UNAVAILABLE>: New.
* inline-frame.c (inline_frame_unwind): Install
default_frame_unwind_stop_reason.
* frame-unwind.c: Include "exceptions.h".
(frame_unwind_find_by_frame): Swallow NOT_AVAILABLE_ERROR errors.
(default_frame_unwind_stop_reason): New.
* frame-unwind.h (frame_unwind_stop_reason_ftype): New typedef.
(default_frame_unwind_stop_reason): Declare.
(struct frame_unwind) <stop_reason>: New function pointer.
* dummy-frame.c: Install default_frame_unwind_stop_reason.
* dwarf2-frame.c: Include exceptions.h.
(struct dwarf2_frame_cache) <unavailable_retaddr>: New field.
(dwarf2_frame_cache): Swallow NOT_AVAILABLE_ERROR errors when
computing the CFA. If such an error was thrown, set
unavailable_retaddr.
(dwarf2_frame_unwind_stop_reason): New.
(dwarf2_frame_this_id): Don't build a frame id if the CFA was
unavailable.
(dwarf2_frame_unwind): Install dwarf2_frame_unwind_stop_reason.
(dwarf2_signal_frame_unwind): Ditto.
* amd64-tdep.c: Include "exceptions.h".
(struct amd64_frame_cache): New field "base_p".
(amd64_init_frame_cache): Clear it.
(amd64_frame_cache_1): New, factored out from amd64_frame_cache.
Avoid reading registers with functions that throw if the register
is not necessary to compute the frame base.
(amd64_frame_cache): Reimplement wrapping amd64_frame_cache_1, and
swallowing NOT_AVAILABLE_ERROR.
(amd64_frame_unwind_stop_reason): New.
(amd64_frame_this_id): Don't build a frame id if the frame base
was unavailable.
(amd64_frame_unwind): Install amd64_frame_unwind_stop_reason.
(amd64_sigtramp_frame_cache): Swallow NOT_AVAILABLE_ERROR, and set
base_p if the frame base was computable.
(amd64_sigtramp_frame_unwind_stop_reason): New.
(amd64_sigtramp_frame_this_id): Don't build a frame id if the
frame base was unavailable.
(amd64_sigtramp_frame_unwind): Install
amd64_sigtramp_frame_unwind_stop_reason.
(amd64_epilogue_frame_cache): Swallow NOT_AVAILABLE_ERROR, and set
base_p if the frame base was computable.
(amd64_epilogue_frame_unwind_stop_reason): New.
(amd64_epilogue_frame_this_id): Don't build a frame id if the
frame base was unavailable.
(amd64_epilogue_frame_unwind): Install
amd64_epilogue_frame_unwind_stop_reason.
* i386-tdep.c: Include "exceptions.h".
(struct i386_frame_cache): New field "base_p".
(i386_init_frame_cache): Clear it.
(i386_frame_cache_1): New, factored out from amd64_frame_cache.
Avoid reading registers with functions that throw if the register
is not necessary to compute the frame base.
(i386_frame_cache): Reimplement wrapping amd64_frame_cache_1, and
swallowing NOT_AVAILABLE_ERROR.
(i386_frame_unwind_stop_reason): New.
(i386_frame_this_id): Don't build a frame id if the frame base was
unavailable.
(i386_frame_prev_register): Handle unavailable SP.
(i386_frame_unwind): Install i386_frame_unwind_stop_reason.
(i386_epilogue_frame_cache): Swallow NOT_AVAILABLE_ERROR, and set
base_p if the frame base was computable.
(i386_epilogue_frame_unwind_stop_reason): New.
(i386_epilogue_frame_this_id): Don't build a frame id if the frame
base was unavailable.
(i386_epilogue_frame_unwind): Install
i386_epilogue_frame_unwind_stop_reason.
(i386_sigtramp_frame_cache): Swallow NOT_AVAILABLE_ERROR, and set
base_p if the frame base was computable.
(i386_sigtramp_frame_unwind_stop_reason): New.
(i386_sigtramp_frame_this_id): Don't build a frame id if the frame
base was unavailable.
(i386_sigtramp_frame_unwind): Install
i386_sigtramp_frame_unwind_stop_reason.
* sentinel-frame.c (sentinel_frame_prev_register): Use the value
type's size, not the register's.
(sentinel_frame_unwind): Install default_frame_unwind_stop_reason.
* alpha-mdebug-tdep.c (alpha_mdebug_frame_unwind): Install
default_frame_unwind_stop_reason.
* alpha-tdep.c (alpha_sigtramp_frame_unwind)
(alpha_heuristic_frame_unwind): Ditto.
* amd64obsd-tdep.c (amd64obsd_trapframe_unwind): Ditto.
* arm-tdep.c (arm_prologue_unwind, arm_stub_unwind): Ditto.
* avr-tdep.c (avr_frame_unwind): Ditto.
* cris-tdep.c (cris_sigtramp_frame_unwind, cris_frame_unwind):
Ditto.
* frv-linux-tdep.c (frv_linux_sigtramp_frame_unwind): Ditto.
* frv-tdep.c (frv_frame_unwind): Ditto.
* h8300-tdep.c (h8300_frame_unwind): Ditto.
* hppa-hpux-tdep.c (hppa_hpux_sigtramp_frame_unwind): Ditto.
* hppa-linux-tdep.c (hppa_linux_sigtramp_frame_unwind): Ditto.
* hppa-tdep.c (hppa_frame_unwind, hppa_fallback_frame_unwind)
(hppa_stub_frame_unwind): Ditto.
* i386obsd-tdep.c (i386obsd_trapframe_unwind): Ditto.
* ia64-tdep.c (ia64_frame_unwind, ia64_sigtramp_frame_unwind)
(ia64_libunwind_frame_unwind)
(ia64_libunwind_sigtramp_frame_unwind): Ditto.
* iq2000-tdep.c (iq2000_frame_unwind): Ditto.
* lm32-tdep.c (lm32_frame_unwind): Ditto.
* m32c-tdep.c (m32c_unwind): Ditto.
* m32r-linux-tdep.c (m32r_linux_sigtramp_frame_unwind): Ditto.
* m32r-tdep.c (m32r_frame_unwind): Ditto.
* m68hc11-tdep.c (m68hc11_frame_unwind): Ditto.
* m68k-tdep.c (m68k_frame_unwind): Ditto.
* m68klinux-tdep.c (m68k_linux_sigtramp_frame_unwind): Ditto.
* m88k-tdep.c (m88k_frame_unwind): Ditto.
* mep-tdep.c (mep_frame_unwind): Ditto.
* microblaze-tdep.c (microblaze_frame_unwind): Ditto.
* mips-tdep.c (mips_insn16_frame_unwind, mips_insn32_frame_unwind)
(mips_stub_frame_unwind): Ditto.
* mn10300-tdep.c (mn10300_frame_unwind): Ditto.
* moxie-tdep.c (moxie_frame_unwind): Ditto.
* mt-tdep.c (mt_frame_unwind): Ditto.
* ppc-linux-tdep.c (ppu2spu_unwind): Ditto.
* ppcobsd-tdep.c (ppcobsd_sigtramp_frame_unwind): Ditto.
* rs6000-tdep.c (rs6000_frame_unwind): Ditto.
* s390-tdep.c (s390_frame_unwind, s390_stub_frame_unwind)
(s390_sigtramp_frame_unwind): Ditto.
* score-tdep.c (score_prologue_unwind): Ditto.
* sh-tdep.c (sh_frame_unwind): Ditto.
* sh64-tdep.c (sh64_frame_unwind): Ditto.
* sparc-sol2-tdep.c (sparc32_sol2_sigtramp_frame_unwind): Ditto.
* sparc-tdep.c (sparc32_frame_unwind): Ditto.
* sparc64-sol2-tdep.c (sparc64_sol2_sigtramp_frame_unwind): Ditto.
* sparc64-tdep.c (sparc64_frame_unwind): Ditto.
* sparc64fbsd-tdep.c (sparc64fbsd_sigtramp_frame_unwind): Ditto.
* sparc64nbsd-tdep.c (sparc64nbsd_sigcontext_frame_unwind): Ditto.
* sparc64obsd-tdep.c (sparc64obsd_frame_unwind)
(sparc64obsd_trapframe_unwind): Ditto.
* sparcnbsd-tdep.c (sparc32nbsd_sigcontext_frame_unwind): Ditto.
* sparcobsd-tdep.c (sparc32obsd_sigtramp_frame_unwind): Ditto.
* spu-tdep.c (spu_frame_unwind, spu2ppu_unwind): Ditto.
* v850-tdep.c (v850_frame_unwind): Ditto.
* vax-tdep.c (vax_frame_unwind): Ditto.
* vaxobsd-tdep.c (vaxobsd_sigtramp_frame_unwind): Ditto.
* xstormy16-tdep.c (frame_unwind xstormy16_frame_unwind): Ditto.
* xtensa-tdep.c (xtensa_unwind): Ditto.
2011-03-18 19:52:32 +01:00
|
|
|
default_frame_unwind_stop_reason,
|
2010-12-29 17:11:49 +01:00
|
|
|
bfin_frame_this_id,
|
|
|
|
bfin_frame_prev_register,
|
|
|
|
NULL,
|
|
|
|
default_frame_sniffer
|
|
|
|
};
|
|
|
|
|
|
|
|
/* Check for "[--SP] = <reg>;" insns. These are appear in function
|
|
|
|
prologues to save misc registers onto the stack. */
|
|
|
|
|
|
|
|
static int
|
|
|
|
is_minus_minus_sp (int op)
|
|
|
|
{
|
|
|
|
op &= 0xFFC0;
|
|
|
|
|
|
|
|
if ((op == P_MINUS_SP1) || (op == P_MINUS_SP2)
|
|
|
|
|| (op == P_MINUS_SP3) || (op == P_MINUS_SP4))
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Skip all the insns that appear in generated function prologues. */
|
|
|
|
|
|
|
|
static CORE_ADDR
|
|
|
|
bfin_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
|
|
|
|
{
|
|
|
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
|
|
|
int op = read_memory_unsigned_integer (pc, 2, byte_order);
|
|
|
|
CORE_ADDR orig_pc = pc;
|
|
|
|
int done = 0;
|
|
|
|
|
|
|
|
/* The new gcc prologue generates the register saves BEFORE the link
|
|
|
|
or RETS saving instruction.
|
|
|
|
So, our job is to stop either at those instructions or some upper
|
|
|
|
limit saying there is no frame! */
|
|
|
|
|
|
|
|
while (!done)
|
|
|
|
{
|
|
|
|
if (is_minus_minus_sp (op))
|
|
|
|
{
|
|
|
|
while (is_minus_minus_sp (op))
|
|
|
|
{
|
|
|
|
pc += 2;
|
|
|
|
op = read_memory_unsigned_integer (pc, 2, byte_order);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (op == P_LINKAGE)
|
|
|
|
pc += 4;
|
|
|
|
|
|
|
|
done = 1;
|
|
|
|
}
|
|
|
|
else if (op == P_LINKAGE)
|
|
|
|
{
|
|
|
|
pc += 4;
|
|
|
|
done = 1;
|
|
|
|
}
|
|
|
|
else if (op == P_MINUS_MINUS_SP_EQ_RETS)
|
|
|
|
{
|
|
|
|
pc += 2;
|
|
|
|
done = 1;
|
|
|
|
}
|
|
|
|
else if (op == P_RTS)
|
|
|
|
{
|
|
|
|
done = 1;
|
|
|
|
}
|
|
|
|
else if ((op >= P_JUMP_PREG_MIN && op <= P_JUMP_PREG_MAX)
|
|
|
|
|| (op >= P_JUMP_PC_PLUS_PREG_MIN
|
|
|
|
&& op <= P_JUMP_PC_PLUS_PREG_MAX)
|
|
|
|
|| (op == P_JUMP_S_MIN && op <= P_JUMP_S_MAX))
|
|
|
|
{
|
|
|
|
done = 1;
|
|
|
|
}
|
|
|
|
else if (pc - orig_pc >= UPPER_LIMIT)
|
|
|
|
{
|
|
|
|
warning (_("Function Prologue not recognised; "
|
|
|
|
"pc will point to ENTRY_POINT of the function"));
|
|
|
|
pc = orig_pc + 2;
|
|
|
|
done = 1;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
pc += 2; /* Not a terminating instruction go on. */
|
|
|
|
op = read_memory_unsigned_integer (pc, 2, byte_order);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* TODO:
|
|
|
|
Dwarf2 uses entry point value AFTER some register initializations.
|
|
|
|
We should perhaps skip such asssignments as well (R6 = R1, ...). */
|
|
|
|
|
|
|
|
return pc;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Return the GDB type object for the "standard" data type of data in
|
|
|
|
register N. This should be void pointer for P0-P5, SP, FP;
|
|
|
|
void pointer to function for PC; int otherwise. */
|
|
|
|
|
|
|
|
static struct type *
|
|
|
|
bfin_register_type (struct gdbarch *gdbarch, int regnum)
|
|
|
|
{
|
|
|
|
if ((regnum >= BFIN_P0_REGNUM && regnum <= BFIN_FP_REGNUM)
|
|
|
|
|| regnum == BFIN_USP_REGNUM)
|
|
|
|
return builtin_type (gdbarch)->builtin_data_ptr;
|
|
|
|
|
2010-12-30 18:36:26 +01:00
|
|
|
if (regnum == BFIN_PC_REGNUM || regnum == BFIN_RETS_REGNUM
|
|
|
|
|| regnum == BFIN_RETI_REGNUM || regnum == BFIN_RETX_REGNUM
|
|
|
|
|| regnum == BFIN_RETN_REGNUM || regnum == BFIN_RETE_REGNUM
|
|
|
|
|| regnum == BFIN_LT0_REGNUM || regnum == BFIN_LB0_REGNUM
|
|
|
|
|| regnum == BFIN_LT1_REGNUM || regnum == BFIN_LB1_REGNUM)
|
2010-12-29 17:11:49 +01:00
|
|
|
return builtin_type (gdbarch)->builtin_func_ptr;
|
|
|
|
|
|
|
|
return builtin_type (gdbarch)->builtin_int32;
|
|
|
|
}
|
|
|
|
|
|
|
|
static CORE_ADDR
|
|
|
|
bfin_push_dummy_call (struct gdbarch *gdbarch,
|
|
|
|
struct value *function,
|
|
|
|
struct regcache *regcache,
|
|
|
|
CORE_ADDR bp_addr,
|
|
|
|
int nargs,
|
|
|
|
struct value **args,
|
|
|
|
CORE_ADDR sp,
|
|
|
|
int struct_return,
|
|
|
|
CORE_ADDR struct_addr)
|
|
|
|
{
|
|
|
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
|
|
|
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
|
|
|
char buf[4];
|
|
|
|
int i;
|
|
|
|
long reg_r0, reg_r1, reg_r2;
|
|
|
|
int total_len = 0;
|
|
|
|
enum bfin_abi abi = bfin_abi (gdbarch);
|
|
|
|
CORE_ADDR func_addr = find_function_addr (function, NULL);
|
|
|
|
|
|
|
|
for (i = nargs - 1; i >= 0; i--)
|
|
|
|
{
|
|
|
|
struct type *value_type = value_enclosing_type (args[i]);
|
|
|
|
|
2012-09-25 14:48:53 +02:00
|
|
|
total_len += (TYPE_LENGTH (value_type) + 3) & ~3;
|
2010-12-29 17:11:49 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
/* At least twelve bytes of stack space must be allocated for the function's
|
|
|
|
arguments, even for functions that have less than 12 bytes of argument
|
|
|
|
data. */
|
|
|
|
|
|
|
|
if (total_len < 12)
|
|
|
|
sp -= 12 - total_len;
|
|
|
|
|
|
|
|
/* Push arguments in reverse order. */
|
|
|
|
|
|
|
|
for (i = nargs - 1; i >= 0; i--)
|
|
|
|
{
|
|
|
|
struct type *value_type = value_enclosing_type (args[i]);
|
|
|
|
struct type *arg_type = check_typedef (value_type);
|
2012-09-25 14:48:53 +02:00
|
|
|
int container_len = (TYPE_LENGTH (value_type) + 3) & ~3;
|
2010-12-29 17:11:49 +01:00
|
|
|
|
|
|
|
sp -= container_len;
|
|
|
|
write_memory (sp, value_contents_writeable (args[i]), container_len);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Initialize R0, R1, and R2 to the first 3 words of parameters. */
|
|
|
|
|
|
|
|
reg_r0 = read_memory_integer (sp, 4, byte_order);
|
|
|
|
regcache_cooked_write_unsigned (regcache, BFIN_R0_REGNUM, reg_r0);
|
|
|
|
reg_r1 = read_memory_integer (sp + 4, 4, byte_order);
|
|
|
|
regcache_cooked_write_unsigned (regcache, BFIN_R1_REGNUM, reg_r1);
|
|
|
|
reg_r2 = read_memory_integer (sp + 8, 4, byte_order);
|
|
|
|
regcache_cooked_write_unsigned (regcache, BFIN_R2_REGNUM, reg_r2);
|
|
|
|
|
|
|
|
/* Store struct value address. */
|
|
|
|
|
|
|
|
if (struct_return)
|
|
|
|
regcache_cooked_write_unsigned (regcache, BFIN_P0_REGNUM, struct_addr);
|
|
|
|
|
|
|
|
/* Set the dummy return value to bp_addr.
|
|
|
|
A dummy breakpoint will be setup to execute the call. */
|
|
|
|
|
|
|
|
regcache_cooked_write_unsigned (regcache, BFIN_RETS_REGNUM, bp_addr);
|
|
|
|
|
|
|
|
/* Finally, update the stack pointer. */
|
|
|
|
|
|
|
|
regcache_cooked_write_unsigned (regcache, BFIN_SP_REGNUM, sp);
|
|
|
|
|
|
|
|
return sp;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Convert DWARF2 register number REG to the appropriate register number
|
|
|
|
used by GDB. */
|
|
|
|
|
|
|
|
static int
|
|
|
|
bfin_reg_to_regnum (struct gdbarch *gdbarch, int reg)
|
|
|
|
{
|
|
|
|
if (reg > ARRAY_SIZE (map_gcc_gdb))
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
return map_gcc_gdb[reg];
|
|
|
|
}
|
|
|
|
|
|
|
|
/* This function implements the BREAKPOINT_FROM_PC macro. It returns
|
|
|
|
a pointer to a string of bytes that encode a breakpoint instruction,
|
|
|
|
stores the length of the string to *lenptr, and adjusts the program
|
|
|
|
counter (if necessary) to point to the actual memory location where
|
|
|
|
the breakpoint should be inserted. */
|
|
|
|
|
|
|
|
static const unsigned char *
|
2011-01-07 20:36:19 +01:00
|
|
|
bfin_breakpoint_from_pc (struct gdbarch *gdbarch,
|
|
|
|
CORE_ADDR *pcptr, int *lenptr)
|
2010-12-29 17:11:49 +01:00
|
|
|
{
|
|
|
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
|
|
|
unsigned short iw;
|
|
|
|
static unsigned char bfin_breakpoint[] = {0xa1, 0x00, 0x00, 0x00};
|
|
|
|
static unsigned char bfin_sim_breakpoint[] = {0x25, 0x00, 0x00, 0x00};
|
|
|
|
|
|
|
|
iw = read_memory_unsigned_integer (*pcptr, 2, byte_order);
|
|
|
|
|
|
|
|
if ((iw & 0xf000) >= 0xc000)
|
|
|
|
/* 32-bit instruction. */
|
|
|
|
*lenptr = 4;
|
|
|
|
else
|
|
|
|
*lenptr = 2;
|
|
|
|
|
|
|
|
if (strcmp (target_shortname, "sim") == 0)
|
|
|
|
return bfin_sim_breakpoint;
|
|
|
|
else
|
|
|
|
return bfin_breakpoint;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
bfin_extract_return_value (struct type *type,
|
|
|
|
struct regcache *regs,
|
|
|
|
gdb_byte *dst)
|
|
|
|
{
|
|
|
|
struct gdbarch *gdbarch = get_regcache_arch (regs);
|
|
|
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
|
|
|
bfd_byte *valbuf = dst;
|
|
|
|
int len = TYPE_LENGTH (type);
|
|
|
|
ULONGEST tmp;
|
|
|
|
int regno = BFIN_R0_REGNUM;
|
|
|
|
|
2012-09-26 09:52:48 +02:00
|
|
|
gdb_assert (TYPE_LENGTH (type) <= 8);
|
2010-12-29 17:11:49 +01:00
|
|
|
|
|
|
|
while (len > 0)
|
|
|
|
{
|
|
|
|
regcache_cooked_read_unsigned (regs, regno++, &tmp);
|
2011-07-20 18:52:36 +02:00
|
|
|
store_unsigned_integer (valbuf, (len > 4 ? 4 : len), byte_order, tmp);
|
2010-12-29 17:11:49 +01:00
|
|
|
len -= 4;
|
|
|
|
valbuf += 4;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Write into appropriate registers a function return value of type
|
|
|
|
TYPE, given in virtual format. */
|
|
|
|
|
|
|
|
static void
|
|
|
|
bfin_store_return_value (struct type *type,
|
|
|
|
struct regcache *regs,
|
|
|
|
const gdb_byte *src)
|
|
|
|
{
|
|
|
|
const bfd_byte *valbuf = src;
|
|
|
|
|
|
|
|
/* Integral values greater than one word are stored in consecutive
|
|
|
|
registers starting with R0. This will always be a multiple of
|
|
|
|
the register size. */
|
|
|
|
|
|
|
|
int len = TYPE_LENGTH (type);
|
|
|
|
int regno = BFIN_R0_REGNUM;
|
|
|
|
|
2012-09-26 09:52:48 +02:00
|
|
|
gdb_assert (TYPE_LENGTH (type) <= 8);
|
2010-12-29 17:11:49 +01:00
|
|
|
|
|
|
|
while (len > 0)
|
|
|
|
{
|
|
|
|
regcache_cooked_write (regs, regno++, valbuf);
|
|
|
|
len -= 4;
|
|
|
|
valbuf += 4;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Determine, for architecture GDBARCH, how a return value of TYPE
|
|
|
|
should be returned. If it is supposed to be returned in registers,
|
|
|
|
and READBUF is nonzero, read the appropriate value from REGCACHE,
|
|
|
|
and copy it into READBUF. If WRITEBUF is nonzero, write the value
|
|
|
|
from WRITEBUF into REGCACHE. */
|
|
|
|
|
|
|
|
static enum return_value_convention
|
|
|
|
bfin_return_value (struct gdbarch *gdbarch,
|
2012-05-16 16:35:09 +02:00
|
|
|
struct value *function,
|
2010-12-29 17:11:49 +01:00
|
|
|
struct type *type,
|
|
|
|
struct regcache *regcache,
|
|
|
|
gdb_byte *readbuf,
|
|
|
|
const gdb_byte *writebuf)
|
|
|
|
{
|
|
|
|
if (TYPE_LENGTH (type) > 8)
|
|
|
|
return RETURN_VALUE_STRUCT_CONVENTION;
|
|
|
|
|
|
|
|
if (readbuf)
|
|
|
|
bfin_extract_return_value (type, regcache, readbuf);
|
|
|
|
|
|
|
|
if (writebuf)
|
|
|
|
bfin_store_return_value (type, regcache, writebuf);
|
|
|
|
|
|
|
|
return RETURN_VALUE_REGISTER_CONVENTION;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Return the BFIN register name corresponding to register I. */
|
|
|
|
|
|
|
|
static const char *
|
|
|
|
bfin_register_name (struct gdbarch *gdbarch, int i)
|
|
|
|
{
|
|
|
|
return bfin_register_name_strings[i];
|
|
|
|
}
|
|
|
|
|
gdb/
* regcache.h (regcache_raw_read, regcache_raw_read_signed)
(regcache_raw_read_unsigned, regcache_raw_read_signed)
(regcache_raw_read_unsigned, regcache_raw_read_part)
(regcache_cooked_read, regcache_cooked_read_signed)
(regcache_cooked_read_unsigned, regcache_cooked_read_part)
(regcache_cooked_read_ftype): Change return to enum
register_status.
* regcache.c: Include exceptions.h
(regcache_save): Adjust to handle REG_UNAVAILABLE registers.
(do_cooked_read): Change return to enum register_status. Always
forward to regcache_cooked_read.
(regcache_raw_read): Change return to enum register_status. If
the register is not REG_VALID, memset the buffer. Return the
register's status.
(regcache_raw_read_signed): Handle non-REG_VALID registers and
return the register's status.
(regcache_raw_read_unsigned): Ditto.
(regcache_cooked_read): Change return to enum register_status.
Assert that with read-only regcaches, the register's status must
be known. If the regcache is read-only, and the register is not
REG_VALID, memset the buffer. Return the register's status.
(regcache_cooked_read_signed): Change return to enum
register_status. Handle non-REG_VALID registers and return the
register's status.
(regcache_cooked_read_unsigned): Change return to enum
register_status. Handle non-REG_VALID registers and return the
register's status.
(regcache_xfer_part, regcache_raw_read_part)
(regcache_cooked_read_part): Change return to enum
register_status. Return the register's status.
(regcache_read_pc): Throw NOT_AVAILABLE_ERROR if the register is
unavailable.
(regcache_dump): Handle unavailable cooked registers.
* frame.c (do_frame_register_read): Adjust interface to match
regcache_cooked_read_ftype.
* gdbarch.sh (pseudo_register_read): Change return to enum
register_status.
* gdbarch.h, gdbarch.c: Regenerate.
* i386-tdep.h (i386_pseudo_register_read): Change return to enum
register_status.
* i386-tdep.c (i386_pseudo_register_read): Change return to enum
register_status. If reading a raw register indicates the raw
register is not valid, return the raw register's status,
otherwise, return REG_VALID.
* amd64-tdep.c (amd64_pseudo_register_read): Change return to enum
register_status. Handle non-REG_VALID raw registers and return
the register's status.
* arm-tdep.c (arm_neon_quad_read)
(arm_pseudo_read): Change return to enum register_status. Handle
non-REG_VALID raw registers and return the register's status.
* avr-tdep.c (avr_pseudo_register_read): Ditto.
* frv-tdep.c (frv_pseudo_register_read): Ditto.
* h8300-tdep.c (h8300_pseudo_register_read): Ditto.
* hppa-tdep.c (hppa_pseudo_register_read): Ditto.
* m32c-tdep.c (m32c_move_reg_t): Change return to enum
register_status.
(m32c_raw_read, m32c_raw_write, m32c_banked_read)
(m32c_banked_write, m32c_sb_read, m32c_sb_write, m32c_part_read)
(m32c_part_write, m32c_cat_read, m32c_cat_write)
(m32c_r3r2r1r0_read, m32c_r3r2r1r0_write)
(m32c_pseudo_register_read): Change return to enum
register_status. Adjust.
* m68hc11-tdep.c (m68hc11_pseudo_register_read): Change return to
enum register_status. Return the register's status.
* mep-tdep.c (mep_pseudo_cr32_read): Change return to enum
register_status. Return the register's status.
(mep_pseudo_cr64_read, mep_pseudo_register_read): Ditto.
* mips-tdep.c (mips_pseudo_register_read): Ditto.
* mt-tdep.c (mt_pseudo_register_read): Ditto.
* rs6000-tdep.c (move_ev_register_func): New typedef.
(e500_move_ev_register): Use it. Change return to enum
register_status. Return the register's status.
(do_regcache_raw_read): New function.
(do_regcache_raw_write): New function.
(e500_pseudo_register_read): Change return to enum
register_status. Return the register's status. Use
do_regcache_raw_read.
(e500_pseudo_register_write): Adjust. Use do_regcache_raw_write.
(dfp_pseudo_register_read): Change return to enum register_status.
Return the register's status.
(vsx_pseudo_register_read): Ditto.
(efpr_pseudo_register_read): Ditto.
(rs6000_pseudo_register_read): Ditto.
* s390-tdep.c (s390_pseudo_register_read): Change return to enum
register_status. Return the register's status.
* sh64-tdep.c (pseudo_register_read_portions): New function.
(sh64_pseudo_register_read): Change return to enum
register_status. Use pseudo_register_read_portions. Return the
register's status.
* ia64-tdep.c (ia64_pseudo_register_read): Change return to enum
register_status. Return the register's status.
* sh-tdep.c (pseudo_register_read_portions): New function.
(sh_pseudo_register_read): Change return to enum register_status.
Use pseudo_register_read_portions. Return the register's status.
* sparc-tdep.c (sparc32_pseudo_register_read): Change return to
enum register_status. Return the register's status.
* sparc64-tdep.c (sparc64_pseudo_register_read): Ditto.
* spu-tdep.c (spu_pseudo_register_read_spu)
(spu_pseudo_register_read): Ditto.
* xtensa-tdep.c (xtensa_register_read_masked)
(xtensa_pseudo_register_read): Ditto.
* bfin-tdep.c (bfin_pseudo_register_read): Ditto.
2011-03-18 19:38:44 +01:00
|
|
|
static enum register_status
|
2010-12-29 17:11:49 +01:00
|
|
|
bfin_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache,
|
|
|
|
int regnum, gdb_byte *buffer)
|
|
|
|
{
|
|
|
|
gdb_byte *buf = (gdb_byte *) alloca (MAX_REGISTER_SIZE);
|
gdb/
* regcache.h (regcache_raw_read, regcache_raw_read_signed)
(regcache_raw_read_unsigned, regcache_raw_read_signed)
(regcache_raw_read_unsigned, regcache_raw_read_part)
(regcache_cooked_read, regcache_cooked_read_signed)
(regcache_cooked_read_unsigned, regcache_cooked_read_part)
(regcache_cooked_read_ftype): Change return to enum
register_status.
* regcache.c: Include exceptions.h
(regcache_save): Adjust to handle REG_UNAVAILABLE registers.
(do_cooked_read): Change return to enum register_status. Always
forward to regcache_cooked_read.
(regcache_raw_read): Change return to enum register_status. If
the register is not REG_VALID, memset the buffer. Return the
register's status.
(regcache_raw_read_signed): Handle non-REG_VALID registers and
return the register's status.
(regcache_raw_read_unsigned): Ditto.
(regcache_cooked_read): Change return to enum register_status.
Assert that with read-only regcaches, the register's status must
be known. If the regcache is read-only, and the register is not
REG_VALID, memset the buffer. Return the register's status.
(regcache_cooked_read_signed): Change return to enum
register_status. Handle non-REG_VALID registers and return the
register's status.
(regcache_cooked_read_unsigned): Change return to enum
register_status. Handle non-REG_VALID registers and return the
register's status.
(regcache_xfer_part, regcache_raw_read_part)
(regcache_cooked_read_part): Change return to enum
register_status. Return the register's status.
(regcache_read_pc): Throw NOT_AVAILABLE_ERROR if the register is
unavailable.
(regcache_dump): Handle unavailable cooked registers.
* frame.c (do_frame_register_read): Adjust interface to match
regcache_cooked_read_ftype.
* gdbarch.sh (pseudo_register_read): Change return to enum
register_status.
* gdbarch.h, gdbarch.c: Regenerate.
* i386-tdep.h (i386_pseudo_register_read): Change return to enum
register_status.
* i386-tdep.c (i386_pseudo_register_read): Change return to enum
register_status. If reading a raw register indicates the raw
register is not valid, return the raw register's status,
otherwise, return REG_VALID.
* amd64-tdep.c (amd64_pseudo_register_read): Change return to enum
register_status. Handle non-REG_VALID raw registers and return
the register's status.
* arm-tdep.c (arm_neon_quad_read)
(arm_pseudo_read): Change return to enum register_status. Handle
non-REG_VALID raw registers and return the register's status.
* avr-tdep.c (avr_pseudo_register_read): Ditto.
* frv-tdep.c (frv_pseudo_register_read): Ditto.
* h8300-tdep.c (h8300_pseudo_register_read): Ditto.
* hppa-tdep.c (hppa_pseudo_register_read): Ditto.
* m32c-tdep.c (m32c_move_reg_t): Change return to enum
register_status.
(m32c_raw_read, m32c_raw_write, m32c_banked_read)
(m32c_banked_write, m32c_sb_read, m32c_sb_write, m32c_part_read)
(m32c_part_write, m32c_cat_read, m32c_cat_write)
(m32c_r3r2r1r0_read, m32c_r3r2r1r0_write)
(m32c_pseudo_register_read): Change return to enum
register_status. Adjust.
* m68hc11-tdep.c (m68hc11_pseudo_register_read): Change return to
enum register_status. Return the register's status.
* mep-tdep.c (mep_pseudo_cr32_read): Change return to enum
register_status. Return the register's status.
(mep_pseudo_cr64_read, mep_pseudo_register_read): Ditto.
* mips-tdep.c (mips_pseudo_register_read): Ditto.
* mt-tdep.c (mt_pseudo_register_read): Ditto.
* rs6000-tdep.c (move_ev_register_func): New typedef.
(e500_move_ev_register): Use it. Change return to enum
register_status. Return the register's status.
(do_regcache_raw_read): New function.
(do_regcache_raw_write): New function.
(e500_pseudo_register_read): Change return to enum
register_status. Return the register's status. Use
do_regcache_raw_read.
(e500_pseudo_register_write): Adjust. Use do_regcache_raw_write.
(dfp_pseudo_register_read): Change return to enum register_status.
Return the register's status.
(vsx_pseudo_register_read): Ditto.
(efpr_pseudo_register_read): Ditto.
(rs6000_pseudo_register_read): Ditto.
* s390-tdep.c (s390_pseudo_register_read): Change return to enum
register_status. Return the register's status.
* sh64-tdep.c (pseudo_register_read_portions): New function.
(sh64_pseudo_register_read): Change return to enum
register_status. Use pseudo_register_read_portions. Return the
register's status.
* ia64-tdep.c (ia64_pseudo_register_read): Change return to enum
register_status. Return the register's status.
* sh-tdep.c (pseudo_register_read_portions): New function.
(sh_pseudo_register_read): Change return to enum register_status.
Use pseudo_register_read_portions. Return the register's status.
* sparc-tdep.c (sparc32_pseudo_register_read): Change return to
enum register_status. Return the register's status.
* sparc64-tdep.c (sparc64_pseudo_register_read): Ditto.
* spu-tdep.c (spu_pseudo_register_read_spu)
(spu_pseudo_register_read): Ditto.
* xtensa-tdep.c (xtensa_register_read_masked)
(xtensa_pseudo_register_read): Ditto.
* bfin-tdep.c (bfin_pseudo_register_read): Ditto.
2011-03-18 19:38:44 +01:00
|
|
|
enum register_status status;
|
2010-12-29 17:11:49 +01:00
|
|
|
|
|
|
|
if (regnum != BFIN_CC_REGNUM)
|
|
|
|
internal_error (__FILE__, __LINE__,
|
|
|
|
_("invalid register number %d"), regnum);
|
|
|
|
|
|
|
|
/* Extract the CC bit from the ASTAT register. */
|
gdb/
* regcache.h (regcache_raw_read, regcache_raw_read_signed)
(regcache_raw_read_unsigned, regcache_raw_read_signed)
(regcache_raw_read_unsigned, regcache_raw_read_part)
(regcache_cooked_read, regcache_cooked_read_signed)
(regcache_cooked_read_unsigned, regcache_cooked_read_part)
(regcache_cooked_read_ftype): Change return to enum
register_status.
* regcache.c: Include exceptions.h
(regcache_save): Adjust to handle REG_UNAVAILABLE registers.
(do_cooked_read): Change return to enum register_status. Always
forward to regcache_cooked_read.
(regcache_raw_read): Change return to enum register_status. If
the register is not REG_VALID, memset the buffer. Return the
register's status.
(regcache_raw_read_signed): Handle non-REG_VALID registers and
return the register's status.
(regcache_raw_read_unsigned): Ditto.
(regcache_cooked_read): Change return to enum register_status.
Assert that with read-only regcaches, the register's status must
be known. If the regcache is read-only, and the register is not
REG_VALID, memset the buffer. Return the register's status.
(regcache_cooked_read_signed): Change return to enum
register_status. Handle non-REG_VALID registers and return the
register's status.
(regcache_cooked_read_unsigned): Change return to enum
register_status. Handle non-REG_VALID registers and return the
register's status.
(regcache_xfer_part, regcache_raw_read_part)
(regcache_cooked_read_part): Change return to enum
register_status. Return the register's status.
(regcache_read_pc): Throw NOT_AVAILABLE_ERROR if the register is
unavailable.
(regcache_dump): Handle unavailable cooked registers.
* frame.c (do_frame_register_read): Adjust interface to match
regcache_cooked_read_ftype.
* gdbarch.sh (pseudo_register_read): Change return to enum
register_status.
* gdbarch.h, gdbarch.c: Regenerate.
* i386-tdep.h (i386_pseudo_register_read): Change return to enum
register_status.
* i386-tdep.c (i386_pseudo_register_read): Change return to enum
register_status. If reading a raw register indicates the raw
register is not valid, return the raw register's status,
otherwise, return REG_VALID.
* amd64-tdep.c (amd64_pseudo_register_read): Change return to enum
register_status. Handle non-REG_VALID raw registers and return
the register's status.
* arm-tdep.c (arm_neon_quad_read)
(arm_pseudo_read): Change return to enum register_status. Handle
non-REG_VALID raw registers and return the register's status.
* avr-tdep.c (avr_pseudo_register_read): Ditto.
* frv-tdep.c (frv_pseudo_register_read): Ditto.
* h8300-tdep.c (h8300_pseudo_register_read): Ditto.
* hppa-tdep.c (hppa_pseudo_register_read): Ditto.
* m32c-tdep.c (m32c_move_reg_t): Change return to enum
register_status.
(m32c_raw_read, m32c_raw_write, m32c_banked_read)
(m32c_banked_write, m32c_sb_read, m32c_sb_write, m32c_part_read)
(m32c_part_write, m32c_cat_read, m32c_cat_write)
(m32c_r3r2r1r0_read, m32c_r3r2r1r0_write)
(m32c_pseudo_register_read): Change return to enum
register_status. Adjust.
* m68hc11-tdep.c (m68hc11_pseudo_register_read): Change return to
enum register_status. Return the register's status.
* mep-tdep.c (mep_pseudo_cr32_read): Change return to enum
register_status. Return the register's status.
(mep_pseudo_cr64_read, mep_pseudo_register_read): Ditto.
* mips-tdep.c (mips_pseudo_register_read): Ditto.
* mt-tdep.c (mt_pseudo_register_read): Ditto.
* rs6000-tdep.c (move_ev_register_func): New typedef.
(e500_move_ev_register): Use it. Change return to enum
register_status. Return the register's status.
(do_regcache_raw_read): New function.
(do_regcache_raw_write): New function.
(e500_pseudo_register_read): Change return to enum
register_status. Return the register's status. Use
do_regcache_raw_read.
(e500_pseudo_register_write): Adjust. Use do_regcache_raw_write.
(dfp_pseudo_register_read): Change return to enum register_status.
Return the register's status.
(vsx_pseudo_register_read): Ditto.
(efpr_pseudo_register_read): Ditto.
(rs6000_pseudo_register_read): Ditto.
* s390-tdep.c (s390_pseudo_register_read): Change return to enum
register_status. Return the register's status.
* sh64-tdep.c (pseudo_register_read_portions): New function.
(sh64_pseudo_register_read): Change return to enum
register_status. Use pseudo_register_read_portions. Return the
register's status.
* ia64-tdep.c (ia64_pseudo_register_read): Change return to enum
register_status. Return the register's status.
* sh-tdep.c (pseudo_register_read_portions): New function.
(sh_pseudo_register_read): Change return to enum register_status.
Use pseudo_register_read_portions. Return the register's status.
* sparc-tdep.c (sparc32_pseudo_register_read): Change return to
enum register_status. Return the register's status.
* sparc64-tdep.c (sparc64_pseudo_register_read): Ditto.
* spu-tdep.c (spu_pseudo_register_read_spu)
(spu_pseudo_register_read): Ditto.
* xtensa-tdep.c (xtensa_register_read_masked)
(xtensa_pseudo_register_read): Ditto.
* bfin-tdep.c (bfin_pseudo_register_read): Ditto.
2011-03-18 19:38:44 +01:00
|
|
|
status = regcache_raw_read (regcache, BFIN_ASTAT_REGNUM, buf);
|
|
|
|
if (status == REG_VALID)
|
|
|
|
{
|
|
|
|
buffer[1] = buffer[2] = buffer[3] = 0;
|
|
|
|
buffer[0] = !!(buf[0] & ASTAT_CC);
|
|
|
|
}
|
|
|
|
return status;
|
2010-12-29 17:11:49 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
bfin_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache,
|
|
|
|
int regnum, const gdb_byte *buffer)
|
|
|
|
{
|
|
|
|
gdb_byte *buf = (gdb_byte *) alloca (MAX_REGISTER_SIZE);
|
|
|
|
|
|
|
|
if (regnum != BFIN_CC_REGNUM)
|
|
|
|
internal_error (__FILE__, __LINE__,
|
|
|
|
_("invalid register number %d"), regnum);
|
|
|
|
|
|
|
|
/* Overlay the CC bit in the ASTAT register. */
|
|
|
|
regcache_raw_read (regcache, BFIN_ASTAT_REGNUM, buf);
|
|
|
|
buf[0] = (buf[0] & ~ASTAT_CC) | ((buffer[0] & 1) << ASTAT_CC_POS);
|
|
|
|
regcache_raw_write (regcache, BFIN_ASTAT_REGNUM, buf);
|
|
|
|
}
|
|
|
|
|
|
|
|
static CORE_ADDR
|
|
|
|
bfin_frame_base_address (struct frame_info *this_frame, void **this_cache)
|
|
|
|
{
|
|
|
|
struct bfin_frame_cache *cache = bfin_frame_cache (this_frame, this_cache);
|
|
|
|
|
|
|
|
return cache->base;
|
|
|
|
}
|
|
|
|
|
|
|
|
static CORE_ADDR
|
|
|
|
bfin_frame_local_address (struct frame_info *this_frame, void **this_cache)
|
|
|
|
{
|
|
|
|
struct bfin_frame_cache *cache = bfin_frame_cache (this_frame, this_cache);
|
|
|
|
|
|
|
|
return cache->base - 4;
|
|
|
|
}
|
|
|
|
|
|
|
|
static CORE_ADDR
|
|
|
|
bfin_frame_args_address (struct frame_info *this_frame, void **this_cache)
|
|
|
|
{
|
|
|
|
struct bfin_frame_cache *cache = bfin_frame_cache (this_frame, this_cache);
|
|
|
|
|
|
|
|
return cache->base + 8;
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct frame_base bfin_frame_base =
|
|
|
|
{
|
|
|
|
&bfin_frame_unwind,
|
|
|
|
bfin_frame_base_address,
|
|
|
|
bfin_frame_local_address,
|
|
|
|
bfin_frame_args_address
|
|
|
|
};
|
|
|
|
|
|
|
|
static struct frame_id
|
|
|
|
bfin_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame)
|
|
|
|
{
|
|
|
|
CORE_ADDR sp;
|
|
|
|
|
|
|
|
sp = get_frame_register_unsigned (this_frame, BFIN_SP_REGNUM);
|
|
|
|
|
|
|
|
return frame_id_build (sp, get_frame_pc (this_frame));
|
|
|
|
}
|
|
|
|
|
|
|
|
static CORE_ADDR
|
|
|
|
bfin_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
|
|
|
|
{
|
|
|
|
return frame_unwind_register_unsigned (next_frame, BFIN_PC_REGNUM);
|
|
|
|
}
|
|
|
|
|
|
|
|
static CORE_ADDR
|
|
|
|
bfin_frame_align (struct gdbarch *gdbarch, CORE_ADDR address)
|
|
|
|
{
|
|
|
|
return (address & ~0x3);
|
|
|
|
}
|
|
|
|
|
|
|
|
enum bfin_abi
|
|
|
|
bfin_abi (struct gdbarch *gdbarch)
|
|
|
|
{
|
|
|
|
return gdbarch_tdep (gdbarch)->bfin_abi;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Initialize the current architecture based on INFO. If possible,
|
|
|
|
re-use an architecture from ARCHES, which is a list of
|
|
|
|
architectures already created during this debugging session.
|
|
|
|
|
|
|
|
Called e.g. at program startup, when reading a core file, and when
|
|
|
|
reading a binary file. */
|
|
|
|
|
|
|
|
static struct gdbarch *
|
|
|
|
bfin_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
|
|
|
|
{
|
|
|
|
struct gdbarch_tdep *tdep;
|
|
|
|
struct gdbarch *gdbarch;
|
|
|
|
int elf_flags;
|
|
|
|
enum bfin_abi abi;
|
|
|
|
|
|
|
|
/* Extract the ELF flags, if available. */
|
|
|
|
if (info.abfd && bfd_get_flavour (info.abfd) == bfd_target_elf_flavour)
|
|
|
|
elf_flags = elf_elfheader (info.abfd)->e_flags;
|
|
|
|
else
|
|
|
|
elf_flags = 0;
|
|
|
|
|
|
|
|
abi = BFIN_ABI_FLAT;
|
|
|
|
|
|
|
|
/* If there is already a candidate, use it. */
|
|
|
|
|
|
|
|
for (arches = gdbarch_list_lookup_by_info (arches, &info);
|
|
|
|
arches != NULL;
|
|
|
|
arches = gdbarch_list_lookup_by_info (arches->next, &info))
|
|
|
|
{
|
|
|
|
if (gdbarch_tdep (arches->gdbarch)->bfin_abi != abi)
|
|
|
|
continue;
|
|
|
|
return arches->gdbarch;
|
|
|
|
}
|
|
|
|
|
|
|
|
tdep = XMALLOC (struct gdbarch_tdep);
|
|
|
|
gdbarch = gdbarch_alloc (&info, tdep);
|
|
|
|
|
|
|
|
tdep->bfin_abi = abi;
|
|
|
|
|
|
|
|
set_gdbarch_num_regs (gdbarch, BFIN_NUM_REGS);
|
|
|
|
set_gdbarch_pseudo_register_read (gdbarch, bfin_pseudo_register_read);
|
|
|
|
set_gdbarch_pseudo_register_write (gdbarch, bfin_pseudo_register_write);
|
|
|
|
set_gdbarch_num_pseudo_regs (gdbarch, BFIN_NUM_PSEUDO_REGS);
|
|
|
|
set_gdbarch_sp_regnum (gdbarch, BFIN_SP_REGNUM);
|
|
|
|
set_gdbarch_pc_regnum (gdbarch, BFIN_PC_REGNUM);
|
|
|
|
set_gdbarch_ps_regnum (gdbarch, BFIN_ASTAT_REGNUM);
|
|
|
|
set_gdbarch_dwarf2_reg_to_regnum (gdbarch, bfin_reg_to_regnum);
|
|
|
|
set_gdbarch_register_name (gdbarch, bfin_register_name);
|
|
|
|
set_gdbarch_register_type (gdbarch, bfin_register_type);
|
|
|
|
set_gdbarch_dummy_id (gdbarch, bfin_dummy_id);
|
|
|
|
set_gdbarch_push_dummy_call (gdbarch, bfin_push_dummy_call);
|
|
|
|
set_gdbarch_believe_pcc_promotion (gdbarch, 1);
|
|
|
|
set_gdbarch_return_value (gdbarch, bfin_return_value);
|
|
|
|
set_gdbarch_skip_prologue (gdbarch, bfin_skip_prologue);
|
|
|
|
set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
|
|
|
|
set_gdbarch_breakpoint_from_pc (gdbarch, bfin_breakpoint_from_pc);
|
|
|
|
set_gdbarch_decr_pc_after_break (gdbarch, 2);
|
|
|
|
set_gdbarch_frame_args_skip (gdbarch, 8);
|
|
|
|
set_gdbarch_unwind_pc (gdbarch, bfin_unwind_pc);
|
|
|
|
set_gdbarch_frame_align (gdbarch, bfin_frame_align);
|
|
|
|
set_gdbarch_print_insn (gdbarch, print_insn_bfin);
|
|
|
|
|
|
|
|
/* Hook in ABI-specific overrides, if they have been registered. */
|
|
|
|
gdbarch_init_osabi (info, gdbarch);
|
|
|
|
|
|
|
|
dwarf2_append_unwinders (gdbarch);
|
|
|
|
|
|
|
|
frame_base_set_default (gdbarch, &bfin_frame_base);
|
|
|
|
|
|
|
|
frame_unwind_append_unwinder (gdbarch, &bfin_frame_unwind);
|
|
|
|
|
|
|
|
return gdbarch;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Provide a prototype to silence -Wmissing-prototypes. */
|
|
|
|
extern initialize_file_ftype _initialize_bfin_tdep;
|
|
|
|
|
|
|
|
void
|
|
|
|
_initialize_bfin_tdep (void)
|
|
|
|
{
|
|
|
|
register_gdbarch_init (bfd_arch_bfin, bfin_gdbarch_init);
|
|
|
|
}
|