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6093d2eb3a
as parameter.
* gdbarch.{c,h}: Regenerate.
* alpha-tdep.c (alpha_skip_prologue): Add gdbarch as parameter.
* amd64-tdep.c (amd64_skip_prologue): Likewise.
* avr-tdep.c (avr_skip_prologue): Likewise.
* cris-tdep.c (cris_skip_prologue): Likewise.
* frv-tdep.c (frv_skip_prologue): Likewise.
* h8300-tdep.c (h8300_skip_prologue): Likewise.
* hppa-tdep.c (hppa_skip_prologue): Likewise.
* i386-tdep.c (i386_skip_prologue): Likewise.
* ia64-tdep.c (ia64_skip_prologue): Likewise.
* iq2000-tdep.c (iq2000_skip_prologue): Likewise.
* m32r-tdep.c (m32r_skip_prologue): Likewise.
* m68hc11-tdep.c (m68hc11_skip_prologue): Likewise.
* m68k-tdep.c (m68k_skip_prologue): Likewise.
* m88k-tdep.c (m88k_skip_prologue): Likewise.
* mep-tdep.c (mep_skip_prologue): Likewise.
* mips-tdep.c (mips_skip_prologue): Likewise.
* mn10300-tdep.c (mn10300_skip_prologue): Likewise.
* mt-tdep.c (mt_skip_prologue): Likewise.
* rs6000-tdep.c (rs6000_skip_prologue): Likewise.
* score-tdep.c (score_skip_prologue): Likewise.
* sh64-tdep.c (sh64_skip_prologue): Likewise.
* sh-tdep.c (sh_skip_prologue): Likewise.
* sparc64-tdep.c (sparc64_skip_prologue): Likewise.
* sparc-tdep.c (sparc32_skip_prologue): Likewise.
* spu-tdep.c (spu_skip_prologue): Likewise.
* v850-tdep.c (v850_skip_prologue): Likewise.
* vax-tdep.c (vax_skip_prologue): Likewise.
* xstormy16-tdep.c (xstormy16_skip_prologue): Likewise.
* xtensa-tdep.c (xtensa_skip_prologue): Likewise.
* arm-tdep.c (arm_skip_prologue): Add gdbarch as parameter. Replace
current_gdbarch by gdbarch.
* m32c-tdep.c (m32c_skip_prologue): Likewise.
* s390-tdep.c (s390_skip_prologue): Likewise.
1048 lines
30 KiB
C
1048 lines
30 KiB
C
/* Target-dependent code for the NEC V850 for GDB, the GNU debugger.
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Copyright (C) 1996, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007,
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2008 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "frame.h"
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#include "frame-base.h"
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#include "trad-frame.h"
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#include "frame-unwind.h"
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#include "dwarf2-frame.h"
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#include "gdbtypes.h"
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#include "inferior.h"
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#include "gdb_string.h"
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#include "gdb_assert.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 "dis-asm.h"
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#include "osabi.h"
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enum
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{
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E_R0_REGNUM,
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E_R1_REGNUM,
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E_R2_REGNUM,
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E_R3_REGNUM, E_SP_REGNUM = E_R3_REGNUM,
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E_R4_REGNUM,
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E_R5_REGNUM,
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E_R6_REGNUM, E_ARG0_REGNUM = E_R6_REGNUM,
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E_R7_REGNUM,
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E_R8_REGNUM,
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E_R9_REGNUM, E_ARGLAST_REGNUM = E_R9_REGNUM,
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E_R10_REGNUM, E_V0_REGNUM = E_R10_REGNUM,
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E_R11_REGNUM, E_V1_REGNUM = E_R11_REGNUM,
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E_R12_REGNUM,
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E_R13_REGNUM,
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E_R14_REGNUM,
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E_R15_REGNUM,
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E_R16_REGNUM,
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E_R17_REGNUM,
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E_R18_REGNUM,
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E_R19_REGNUM,
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E_R20_REGNUM,
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E_R21_REGNUM,
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E_R22_REGNUM,
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E_R23_REGNUM,
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E_R24_REGNUM,
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E_R25_REGNUM,
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E_R26_REGNUM,
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E_R27_REGNUM,
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E_R28_REGNUM,
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E_R29_REGNUM, E_FP_REGNUM = E_R29_REGNUM,
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E_R30_REGNUM, E_EP_REGNUM = E_R30_REGNUM,
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E_R31_REGNUM, E_LP_REGNUM = E_R31_REGNUM,
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E_R32_REGNUM, E_SR0_REGNUM = E_R32_REGNUM,
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E_R33_REGNUM,
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E_R34_REGNUM,
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E_R35_REGNUM,
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E_R36_REGNUM,
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E_R37_REGNUM, E_PS_REGNUM = E_R37_REGNUM,
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E_R38_REGNUM,
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E_R39_REGNUM,
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E_R40_REGNUM,
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E_R41_REGNUM,
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E_R42_REGNUM,
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E_R43_REGNUM,
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E_R44_REGNUM,
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E_R45_REGNUM,
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E_R46_REGNUM,
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E_R47_REGNUM,
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E_R48_REGNUM,
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E_R49_REGNUM,
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E_R50_REGNUM,
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E_R51_REGNUM,
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E_R52_REGNUM, E_CTBP_REGNUM = E_R52_REGNUM,
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E_R53_REGNUM,
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E_R54_REGNUM,
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E_R55_REGNUM,
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E_R56_REGNUM,
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E_R57_REGNUM,
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E_R58_REGNUM,
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E_R59_REGNUM,
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E_R60_REGNUM,
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E_R61_REGNUM,
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E_R62_REGNUM,
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E_R63_REGNUM,
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E_R64_REGNUM, E_PC_REGNUM = E_R64_REGNUM,
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E_R65_REGNUM,
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E_NUM_REGS
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};
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enum
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{
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v850_reg_size = 4
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};
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/* Size of return datatype which fits into all return registers. */
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enum
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{
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E_MAX_RETTYPE_SIZE_IN_REGS = 2 * v850_reg_size
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};
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struct v850_frame_cache
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{
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/* Base address. */
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CORE_ADDR base;
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LONGEST sp_offset;
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CORE_ADDR pc;
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/* Flag showing that a frame has been created in the prologue code. */
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int uses_fp;
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/* Saved registers. */
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struct trad_frame_saved_reg *saved_regs;
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};
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/* Info gleaned from scanning a function's prologue. */
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struct pifsr /* Info about one saved register. */
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{
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int offset; /* Offset from sp or fp. */
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int cur_frameoffset; /* Current frameoffset. */
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int reg; /* Saved register number. */
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};
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static const char *
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v850_register_name (struct gdbarch *gdbarch, int regnum)
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{
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static const char *v850_reg_names[] =
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{ "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
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"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
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"r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
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"r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
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"eipc", "eipsw", "fepc", "fepsw", "ecr", "psw", "sr6", "sr7",
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"sr8", "sr9", "sr10", "sr11", "sr12", "sr13", "sr14", "sr15",
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"sr16", "sr17", "sr18", "sr19", "sr20", "sr21", "sr22", "sr23",
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"sr24", "sr25", "sr26", "sr27", "sr28", "sr29", "sr30", "sr31",
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"pc", "fp"
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};
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if (regnum < 0 || regnum >= E_NUM_REGS)
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return NULL;
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return v850_reg_names[regnum];
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}
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static const char *
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v850e_register_name (struct gdbarch *gdbarch, int regnum)
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{
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static const char *v850e_reg_names[] =
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{
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"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
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"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
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"r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
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"r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
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"eipc", "eipsw", "fepc", "fepsw", "ecr", "psw", "sr6", "sr7",
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"sr8", "sr9", "sr10", "sr11", "sr12", "sr13", "sr14", "sr15",
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"ctpc", "ctpsw", "dbpc", "dbpsw", "ctbp", "sr21", "sr22", "sr23",
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"sr24", "sr25", "sr26", "sr27", "sr28", "sr29", "sr30", "sr31",
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"pc", "fp"
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};
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if (regnum < 0 || regnum >= E_NUM_REGS)
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return NULL;
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return v850e_reg_names[regnum];
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}
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/* Returns the default type for register N. */
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static struct type *
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v850_register_type (struct gdbarch *gdbarch, int regnum)
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{
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if (regnum == E_PC_REGNUM)
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return builtin_type_void_func_ptr;
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return builtin_type_int32;
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}
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static int
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v850_type_is_scalar (struct type *t)
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{
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return (TYPE_CODE (t) != TYPE_CODE_STRUCT
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&& TYPE_CODE (t) != TYPE_CODE_UNION
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&& TYPE_CODE (t) != TYPE_CODE_ARRAY);
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}
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/* Should call_function allocate stack space for a struct return? */
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static int
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v850_use_struct_convention (struct type *type)
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{
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int i;
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struct type *fld_type, *tgt_type;
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/* 1. The value is greater than 8 bytes -> returned by copying. */
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if (TYPE_LENGTH (type) > 8)
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return 1;
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/* 2. The value is a single basic type -> returned in register. */
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if (v850_type_is_scalar (type))
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return 0;
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/* The value is a structure or union with a single element and that
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element is either a single basic type or an array of a single basic
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type whose size is greater than or equal to 4 -> returned in register. */
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if ((TYPE_CODE (type) == TYPE_CODE_STRUCT
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|| TYPE_CODE (type) == TYPE_CODE_UNION)
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&& TYPE_NFIELDS (type) == 1)
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{
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fld_type = TYPE_FIELD_TYPE (type, 0);
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if (v850_type_is_scalar (fld_type) && TYPE_LENGTH (fld_type) >= 4)
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return 0;
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if (TYPE_CODE (fld_type) == TYPE_CODE_ARRAY)
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{
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tgt_type = TYPE_TARGET_TYPE (fld_type);
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if (v850_type_is_scalar (tgt_type) && TYPE_LENGTH (tgt_type) >= 4)
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return 0;
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}
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}
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/* The value is a structure whose first element is an integer or a float,
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and which contains no arrays of more than two elements -> returned in
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register. */
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if (TYPE_CODE (type) == TYPE_CODE_STRUCT
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&& v850_type_is_scalar (TYPE_FIELD_TYPE (type, 0))
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&& TYPE_LENGTH (TYPE_FIELD_TYPE (type, 0)) == 4)
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{
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for (i = 1; i < TYPE_NFIELDS (type); ++i)
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{
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fld_type = TYPE_FIELD_TYPE (type, 0);
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if (TYPE_CODE (fld_type) == TYPE_CODE_ARRAY)
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{
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tgt_type = TYPE_TARGET_TYPE (fld_type);
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if (TYPE_LENGTH (fld_type) >= 0 && TYPE_LENGTH (tgt_type) >= 0
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&& TYPE_LENGTH (fld_type) / TYPE_LENGTH (tgt_type) > 2)
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return 1;
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}
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}
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return 0;
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}
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/* The value is a union which contains at least one field which would be
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returned in registers according to these rules -> returned in register. */
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if (TYPE_CODE (type) == TYPE_CODE_UNION)
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{
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for (i = 0; i < TYPE_NFIELDS (type); ++i)
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{
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fld_type = TYPE_FIELD_TYPE (type, 0);
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if (!v850_use_struct_convention (fld_type))
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return 0;
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}
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}
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return 1;
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}
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/* Structure for mapping bits in register lists to register numbers. */
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struct reg_list
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{
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long mask;
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int regno;
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};
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/* Helper function for v850_scan_prologue to handle prepare instruction. */
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static void
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v850_handle_prepare (int insn, int insn2, CORE_ADDR * current_pc_ptr,
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struct v850_frame_cache *pi, struct pifsr **pifsr_ptr)
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{
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CORE_ADDR current_pc = *current_pc_ptr;
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struct pifsr *pifsr = *pifsr_ptr;
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long next = insn2 & 0xffff;
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long list12 = ((insn & 1) << 16) + (next & 0xffe0);
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long offset = (insn & 0x3e) << 1;
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static struct reg_list reg_table[] =
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{
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{0x00800, 20}, /* r20 */
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{0x00400, 21}, /* r21 */
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{0x00200, 22}, /* r22 */
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{0x00100, 23}, /* r23 */
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{0x08000, 24}, /* r24 */
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{0x04000, 25}, /* r25 */
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{0x02000, 26}, /* r26 */
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{0x01000, 27}, /* r27 */
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{0x00080, 28}, /* r28 */
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{0x00040, 29}, /* r29 */
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{0x10000, 30}, /* ep */
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{0x00020, 31}, /* lp */
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{0, 0} /* end of table */
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};
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int i;
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if ((next & 0x1f) == 0x0b) /* skip imm16 argument */
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current_pc += 2;
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else if ((next & 0x1f) == 0x13) /* skip imm16 argument */
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current_pc += 2;
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else if ((next & 0x1f) == 0x1b) /* skip imm32 argument */
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current_pc += 4;
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/* Calculate the total size of the saved registers, and add it to the
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immediate value used to adjust SP. */
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for (i = 0; reg_table[i].mask != 0; i++)
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if (list12 & reg_table[i].mask)
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offset += v850_reg_size;
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pi->sp_offset -= offset;
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/* Calculate the offsets of the registers relative to the value the SP
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will have after the registers have been pushed and the imm5 value has
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been subtracted from it. */
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if (pifsr)
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{
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for (i = 0; reg_table[i].mask != 0; i++)
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{
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if (list12 & reg_table[i].mask)
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{
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int reg = reg_table[i].regno;
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offset -= v850_reg_size;
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pifsr->reg = reg;
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pifsr->offset = offset;
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pifsr->cur_frameoffset = pi->sp_offset;
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pifsr++;
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}
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}
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}
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/* Set result parameters. */
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*current_pc_ptr = current_pc;
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*pifsr_ptr = pifsr;
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}
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/* Helper function for v850_scan_prologue to handle pushm/pushl instructions.
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The SR bit of the register list is not supported. gcc does not generate
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this bit. */
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static void
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v850_handle_pushm (int insn, int insn2, struct v850_frame_cache *pi,
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struct pifsr **pifsr_ptr)
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{
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struct pifsr *pifsr = *pifsr_ptr;
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long list12 = ((insn & 0x0f) << 16) + (insn2 & 0xfff0);
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long offset = 0;
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static struct reg_list pushml_reg_table[] =
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{
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{0x80000, E_PS_REGNUM}, /* PSW */
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{0x40000, 1}, /* r1 */
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{0x20000, 2}, /* r2 */
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{0x10000, 3}, /* r3 */
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{0x00800, 4}, /* r4 */
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{0x00400, 5}, /* r5 */
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{0x00200, 6}, /* r6 */
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{0x00100, 7}, /* r7 */
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{0x08000, 8}, /* r8 */
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{0x04000, 9}, /* r9 */
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{0x02000, 10}, /* r10 */
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{0x01000, 11}, /* r11 */
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{0x00080, 12}, /* r12 */
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{0x00040, 13}, /* r13 */
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{0x00020, 14}, /* r14 */
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{0x00010, 15}, /* r15 */
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{0, 0} /* end of table */
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};
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static struct reg_list pushmh_reg_table[] =
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{
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{0x80000, 16}, /* r16 */
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{0x40000, 17}, /* r17 */
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{0x20000, 18}, /* r18 */
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{0x10000, 19}, /* r19 */
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{0x00800, 20}, /* r20 */
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{0x00400, 21}, /* r21 */
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{0x00200, 22}, /* r22 */
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{0x00100, 23}, /* r23 */
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{0x08000, 24}, /* r24 */
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{0x04000, 25}, /* r25 */
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{0x02000, 26}, /* r26 */
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{0x01000, 27}, /* r27 */
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{0x00080, 28}, /* r28 */
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{0x00040, 29}, /* r29 */
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{0x00010, 30}, /* r30 */
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{0x00020, 31}, /* r31 */
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{0, 0} /* end of table */
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};
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struct reg_list *reg_table;
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int i;
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/* Is this a pushml or a pushmh? */
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if ((insn2 & 7) == 1)
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reg_table = pushml_reg_table;
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else
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reg_table = pushmh_reg_table;
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/* Calculate the total size of the saved registers, and add it it to the
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immediate value used to adjust SP. */
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for (i = 0; reg_table[i].mask != 0; i++)
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if (list12 & reg_table[i].mask)
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offset += v850_reg_size;
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pi->sp_offset -= offset;
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/* Calculate the offsets of the registers relative to the value the SP
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will have after the registers have been pushed and the imm5 value is
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subtracted from it. */
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if (pifsr)
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{
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for (i = 0; reg_table[i].mask != 0; i++)
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{
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|
if (list12 & reg_table[i].mask)
|
|
{
|
|
int reg = reg_table[i].regno;
|
|
offset -= v850_reg_size;
|
|
pifsr->reg = reg;
|
|
pifsr->offset = offset;
|
|
pifsr->cur_frameoffset = pi->sp_offset;
|
|
pifsr++;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Set result parameters. */
|
|
*pifsr_ptr = pifsr;
|
|
}
|
|
|
|
/* Helper function to evaluate if register is one of the "save" registers.
|
|
This allows to simplify conditionals in v850_analyze_prologue a lot. */
|
|
|
|
static int
|
|
v850_is_save_register (int reg)
|
|
{
|
|
/* The caller-save registers are R2, R20 - R29 and R31. All other
|
|
registers are either special purpose (PC, SP), argument registers,
|
|
or just considered free for use in the caller. */
|
|
return reg == E_R2_REGNUM
|
|
|| (reg >= E_R20_REGNUM && reg <= E_R29_REGNUM)
|
|
|| reg == E_R31_REGNUM;
|
|
}
|
|
|
|
/* Scan the prologue of the function that contains PC, and record what
|
|
we find in PI. Returns the pc after the prologue. Note that the
|
|
addresses saved in frame->saved_regs are just frame relative (negative
|
|
offsets from the frame pointer). This is because we don't know the
|
|
actual value of the frame pointer yet. In some circumstances, the
|
|
frame pointer can't be determined till after we have scanned the
|
|
prologue. */
|
|
|
|
static CORE_ADDR
|
|
v850_analyze_prologue (CORE_ADDR func_addr, CORE_ADDR pc,
|
|
struct v850_frame_cache *pi, ULONGEST ctbp)
|
|
{
|
|
CORE_ADDR prologue_end, current_pc;
|
|
struct pifsr pifsrs[E_NUM_REGS + 1];
|
|
struct pifsr *pifsr, *pifsr_tmp;
|
|
int fp_used;
|
|
int ep_used;
|
|
int reg;
|
|
CORE_ADDR save_pc, save_end;
|
|
int regsave_func_p;
|
|
int r12_tmp;
|
|
|
|
memset (&pifsrs, 0, sizeof pifsrs);
|
|
pifsr = &pifsrs[0];
|
|
|
|
prologue_end = pc;
|
|
|
|
/* Now, search the prologue looking for instructions that setup fp, save
|
|
rp, adjust sp and such. We also record the frame offset of any saved
|
|
registers. */
|
|
|
|
pi->sp_offset = 0;
|
|
pi->uses_fp = 0;
|
|
ep_used = 0;
|
|
regsave_func_p = 0;
|
|
save_pc = 0;
|
|
save_end = 0;
|
|
r12_tmp = 0;
|
|
|
|
for (current_pc = func_addr; current_pc < prologue_end;)
|
|
{
|
|
int insn;
|
|
int insn2 = -1; /* dummy value */
|
|
|
|
insn = read_memory_integer (current_pc, 2);
|
|
current_pc += 2;
|
|
if ((insn & 0x0780) >= 0x0600) /* Four byte instruction? */
|
|
{
|
|
insn2 = read_memory_integer (current_pc, 2);
|
|
current_pc += 2;
|
|
}
|
|
|
|
if ((insn & 0xffc0) == ((10 << 11) | 0x0780) && !regsave_func_p)
|
|
{ /* jarl <func>,10 */
|
|
long low_disp = insn2 & ~(long) 1;
|
|
long disp = (((((insn & 0x3f) << 16) + low_disp)
|
|
& ~(long) 1) ^ 0x00200000) - 0x00200000;
|
|
|
|
save_pc = current_pc;
|
|
save_end = prologue_end;
|
|
regsave_func_p = 1;
|
|
current_pc += disp - 4;
|
|
prologue_end = (current_pc
|
|
+ (2 * 3) /* moves to/from ep */
|
|
+ 4 /* addi <const>,sp,sp */
|
|
+ 2 /* jmp [r10] */
|
|
+ (2 * 12) /* sst.w to save r2, r20-r29, r31 */
|
|
+ 20); /* slop area */
|
|
}
|
|
else if ((insn & 0xffc0) == 0x0200 && !regsave_func_p)
|
|
{ /* callt <imm6> */
|
|
long adr = ctbp + ((insn & 0x3f) << 1);
|
|
|
|
save_pc = current_pc;
|
|
save_end = prologue_end;
|
|
regsave_func_p = 1;
|
|
current_pc = ctbp + (read_memory_unsigned_integer (adr, 2) & 0xffff);
|
|
prologue_end = (current_pc
|
|
+ (2 * 3) /* prepare list2,imm5,sp/imm */
|
|
+ 4 /* ctret */
|
|
+ 20); /* slop area */
|
|
continue;
|
|
}
|
|
else if ((insn & 0xffc0) == 0x0780) /* prepare list2,imm5 */
|
|
{
|
|
v850_handle_prepare (insn, insn2, ¤t_pc, pi, &pifsr);
|
|
continue;
|
|
}
|
|
else if (insn == 0x07e0 && regsave_func_p && insn2 == 0x0144)
|
|
{ /* ctret after processing register save. */
|
|
current_pc = save_pc;
|
|
prologue_end = save_end;
|
|
regsave_func_p = 0;
|
|
continue;
|
|
}
|
|
else if ((insn & 0xfff0) == 0x07e0 && (insn2 & 5) == 1)
|
|
{ /* pushml, pushmh */
|
|
v850_handle_pushm (insn, insn2, pi, &pifsr);
|
|
continue;
|
|
}
|
|
else if ((insn & 0xffe0) == 0x0060 && regsave_func_p)
|
|
{ /* jmp after processing register save. */
|
|
current_pc = save_pc;
|
|
prologue_end = save_end;
|
|
regsave_func_p = 0;
|
|
continue;
|
|
}
|
|
else if ((insn & 0x07c0) == 0x0780 /* jarl or jr */
|
|
|| (insn & 0xffe0) == 0x0060 /* jmp */
|
|
|| (insn & 0x0780) == 0x0580) /* branch */
|
|
{
|
|
break; /* Ran into end of prologue */
|
|
}
|
|
|
|
else if ((insn & 0xffe0) == ((E_SP_REGNUM << 11) | 0x0240))
|
|
/* add <imm>,sp */
|
|
pi->sp_offset += ((insn & 0x1f) ^ 0x10) - 0x10;
|
|
else if (insn == ((E_SP_REGNUM << 11) | 0x0600 | E_SP_REGNUM))
|
|
/* addi <imm>,sp,sp */
|
|
pi->sp_offset += insn2;
|
|
else if (insn == ((E_FP_REGNUM << 11) | 0x0000 | E_SP_REGNUM))
|
|
/* mov sp,fp */
|
|
pi->uses_fp = 1;
|
|
else if (insn == ((E_R12_REGNUM << 11) | 0x0640 | E_R0_REGNUM))
|
|
/* movhi hi(const),r0,r12 */
|
|
r12_tmp = insn2 << 16;
|
|
else if (insn == ((E_R12_REGNUM << 11) | 0x0620 | E_R12_REGNUM))
|
|
/* movea lo(const),r12,r12 */
|
|
r12_tmp += insn2;
|
|
else if (insn == ((E_SP_REGNUM << 11) | 0x01c0 | E_R12_REGNUM) && r12_tmp)
|
|
/* add r12,sp */
|
|
pi->sp_offset += r12_tmp;
|
|
else if (insn == ((E_EP_REGNUM << 11) | 0x0000 | E_SP_REGNUM))
|
|
/* mov sp,ep */
|
|
ep_used = 1;
|
|
else if (insn == ((E_EP_REGNUM << 11) | 0x0000 | E_R1_REGNUM))
|
|
/* mov r1,ep */
|
|
ep_used = 0;
|
|
else if (((insn & 0x07ff) == (0x0760 | E_SP_REGNUM)
|
|
|| (pi->uses_fp
|
|
&& (insn & 0x07ff) == (0x0760 | E_FP_REGNUM)))
|
|
&& pifsr
|
|
&& v850_is_save_register (reg = (insn >> 11) & 0x1f))
|
|
{
|
|
/* st.w <reg>,<offset>[sp] or st.w <reg>,<offset>[fp] */
|
|
pifsr->reg = reg;
|
|
pifsr->offset = insn2 & ~1;
|
|
pifsr->cur_frameoffset = pi->sp_offset;
|
|
pifsr++;
|
|
}
|
|
else if (ep_used
|
|
&& ((insn & 0x0781) == 0x0501)
|
|
&& pifsr
|
|
&& v850_is_save_register (reg = (insn >> 11) & 0x1f))
|
|
{
|
|
/* sst.w <reg>,<offset>[ep] */
|
|
pifsr->reg = reg;
|
|
pifsr->offset = (insn & 0x007e) << 1;
|
|
pifsr->cur_frameoffset = pi->sp_offset;
|
|
pifsr++;
|
|
}
|
|
}
|
|
|
|
/* Fix up any offsets to the final offset. If a frame pointer was created,
|
|
use it instead of the stack pointer. */
|
|
for (pifsr_tmp = pifsrs; pifsr_tmp != pifsr; pifsr_tmp++)
|
|
{
|
|
pifsr_tmp->offset -= pi->sp_offset - pifsr_tmp->cur_frameoffset;
|
|
pi->saved_regs[pifsr_tmp->reg].addr = pifsr_tmp->offset;
|
|
}
|
|
|
|
return current_pc;
|
|
}
|
|
|
|
/* Return the address of the first code past the prologue of the function. */
|
|
|
|
static CORE_ADDR
|
|
v850_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
|
|
{
|
|
CORE_ADDR func_addr, func_end;
|
|
|
|
/* See what the symbol table says */
|
|
|
|
if (find_pc_partial_function (pc, NULL, &func_addr, &func_end))
|
|
{
|
|
struct symtab_and_line sal;
|
|
|
|
sal = find_pc_line (func_addr, 0);
|
|
if (sal.line != 0 && sal.end < func_end)
|
|
return sal.end;
|
|
|
|
/* Either there's no line info, or the line after the prologue is after
|
|
the end of the function. In this case, there probably isn't a
|
|
prologue. */
|
|
return pc;
|
|
}
|
|
|
|
/* We can't find the start of this function, so there's nothing we can do. */
|
|
return pc;
|
|
}
|
|
|
|
static CORE_ADDR
|
|
v850_frame_align (struct gdbarch *ignore, CORE_ADDR sp)
|
|
{
|
|
return sp & ~3;
|
|
}
|
|
|
|
/* Setup arguments and LP for a call to the target. First four args
|
|
go in R6->R9, subsequent args go into sp + 16 -> sp + ... Structs
|
|
are passed by reference. 64 bit quantities (doubles and long longs)
|
|
may be split between the regs and the stack. When calling a function
|
|
that returns a struct, a pointer to the struct is passed in as a secret
|
|
first argument (always in R6).
|
|
|
|
Stack space for the args has NOT been allocated: that job is up to us. */
|
|
|
|
static CORE_ADDR
|
|
v850_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)
|
|
{
|
|
int argreg;
|
|
int argnum;
|
|
int len = 0;
|
|
int stack_offset;
|
|
|
|
/* The offset onto the stack at which we will start copying parameters
|
|
(after the registers are used up) begins at 16 rather than at zero.
|
|
That's how the ABI is defined, though there's no indication that these
|
|
16 bytes are used for anything, not even for saving incoming
|
|
argument registers. */
|
|
stack_offset = 16;
|
|
|
|
/* Now make space on the stack for the args. */
|
|
for (argnum = 0; argnum < nargs; argnum++)
|
|
len += ((TYPE_LENGTH (value_type (args[argnum])) + 3) & ~3);
|
|
sp -= len + stack_offset;
|
|
|
|
argreg = E_ARG0_REGNUM;
|
|
/* The struct_return pointer occupies the first parameter register. */
|
|
if (struct_return)
|
|
regcache_cooked_write_unsigned (regcache, argreg++, struct_addr);
|
|
|
|
/* Now load as many as possible of the first arguments into
|
|
registers, and push the rest onto the stack. There are 16 bytes
|
|
in four registers available. Loop thru args from first to last. */
|
|
for (argnum = 0; argnum < nargs; argnum++)
|
|
{
|
|
int len;
|
|
gdb_byte *val;
|
|
gdb_byte valbuf[v850_reg_size];
|
|
|
|
if (!v850_type_is_scalar (value_type (*args))
|
|
&& TYPE_LENGTH (value_type (*args)) > E_MAX_RETTYPE_SIZE_IN_REGS)
|
|
{
|
|
store_unsigned_integer (valbuf, 4, VALUE_ADDRESS (*args));
|
|
len = 4;
|
|
val = valbuf;
|
|
}
|
|
else
|
|
{
|
|
len = TYPE_LENGTH (value_type (*args));
|
|
val = (gdb_byte *) value_contents (*args);
|
|
}
|
|
|
|
while (len > 0)
|
|
if (argreg <= E_ARGLAST_REGNUM)
|
|
{
|
|
CORE_ADDR regval;
|
|
|
|
regval = extract_unsigned_integer (val, v850_reg_size);
|
|
regcache_cooked_write_unsigned (regcache, argreg, regval);
|
|
|
|
len -= v850_reg_size;
|
|
val += v850_reg_size;
|
|
argreg++;
|
|
}
|
|
else
|
|
{
|
|
write_memory (sp + stack_offset, val, 4);
|
|
|
|
len -= 4;
|
|
val += 4;
|
|
stack_offset += 4;
|
|
}
|
|
args++;
|
|
}
|
|
|
|
/* Store return address. */
|
|
regcache_cooked_write_unsigned (regcache, E_LP_REGNUM, bp_addr);
|
|
|
|
/* Update stack pointer. */
|
|
regcache_cooked_write_unsigned (regcache, E_SP_REGNUM, sp);
|
|
|
|
return sp;
|
|
}
|
|
|
|
static void
|
|
v850_extract_return_value (struct type *type, struct regcache *regcache,
|
|
gdb_byte *valbuf)
|
|
{
|
|
int len = TYPE_LENGTH (type);
|
|
|
|
if (len <= v850_reg_size)
|
|
{
|
|
ULONGEST val;
|
|
|
|
regcache_cooked_read_unsigned (regcache, E_V0_REGNUM, &val);
|
|
store_unsigned_integer (valbuf, len, val);
|
|
}
|
|
else if (len <= 2 * v850_reg_size)
|
|
{
|
|
int i, regnum = E_V0_REGNUM;
|
|
gdb_byte buf[v850_reg_size];
|
|
for (i = 0; len > 0; i += 4, len -= 4)
|
|
{
|
|
regcache_raw_read (regcache, regnum++, buf);
|
|
memcpy (valbuf + i, buf, len > 4 ? 4 : len);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
v850_store_return_value (struct type *type, struct regcache *regcache,
|
|
const gdb_byte *valbuf)
|
|
{
|
|
int len = TYPE_LENGTH (type);
|
|
|
|
if (len <= v850_reg_size)
|
|
regcache_cooked_write_unsigned (regcache, E_V0_REGNUM,
|
|
extract_unsigned_integer (valbuf, len));
|
|
else if (len <= 2 * v850_reg_size)
|
|
{
|
|
int i, regnum = E_V0_REGNUM;
|
|
for (i = 0; i < len; i += 4)
|
|
regcache_raw_write (regcache, regnum++, valbuf + i);
|
|
}
|
|
}
|
|
|
|
static enum return_value_convention
|
|
v850_return_value (struct gdbarch *gdbarch, struct type *type,
|
|
struct regcache *regcache,
|
|
gdb_byte *readbuf, const gdb_byte *writebuf)
|
|
{
|
|
if (v850_use_struct_convention (type))
|
|
return RETURN_VALUE_STRUCT_CONVENTION;
|
|
if (writebuf)
|
|
v850_store_return_value (type, regcache, writebuf);
|
|
else if (readbuf)
|
|
v850_extract_return_value (type, regcache, readbuf);
|
|
return RETURN_VALUE_REGISTER_CONVENTION;
|
|
}
|
|
|
|
const static unsigned char *
|
|
v850_breakpoint_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr, int *lenptr)
|
|
{
|
|
static unsigned char breakpoint[] = { 0x85, 0x05 };
|
|
*lenptr = sizeof (breakpoint);
|
|
return breakpoint;
|
|
}
|
|
|
|
static struct v850_frame_cache *
|
|
v850_alloc_frame_cache (struct frame_info *next_frame)
|
|
{
|
|
struct v850_frame_cache *cache;
|
|
int i;
|
|
|
|
cache = FRAME_OBSTACK_ZALLOC (struct v850_frame_cache);
|
|
cache->saved_regs = trad_frame_alloc_saved_regs (next_frame);
|
|
|
|
/* Base address. */
|
|
cache->base = 0;
|
|
cache->sp_offset = 0;
|
|
cache->pc = 0;
|
|
|
|
/* Frameless until proven otherwise. */
|
|
cache->uses_fp = 0;
|
|
|
|
return cache;
|
|
}
|
|
|
|
static struct v850_frame_cache *
|
|
v850_frame_cache (struct frame_info *next_frame, void **this_cache)
|
|
{
|
|
struct v850_frame_cache *cache;
|
|
CORE_ADDR current_pc;
|
|
int i;
|
|
|
|
if (*this_cache)
|
|
return *this_cache;
|
|
|
|
cache = v850_alloc_frame_cache (next_frame);
|
|
*this_cache = cache;
|
|
|
|
/* In principle, for normal frames, fp holds the frame pointer,
|
|
which holds the base address for the current stack frame.
|
|
However, for functions that don't need it, the frame pointer is
|
|
optional. For these "frameless" functions the frame pointer is
|
|
actually the frame pointer of the calling frame. */
|
|
cache->base = frame_unwind_register_unsigned (next_frame, E_FP_REGNUM);
|
|
if (cache->base == 0)
|
|
return cache;
|
|
|
|
cache->pc = frame_func_unwind (next_frame, NORMAL_FRAME);
|
|
current_pc = frame_pc_unwind (next_frame);
|
|
if (cache->pc != 0)
|
|
{
|
|
ULONGEST ctbp;
|
|
ctbp = frame_unwind_register_unsigned (next_frame, E_CTBP_REGNUM);
|
|
v850_analyze_prologue (cache->pc, current_pc, cache, ctbp);
|
|
}
|
|
|
|
if (!cache->uses_fp)
|
|
{
|
|
/* We didn't find a valid frame, which means that CACHE->base
|
|
currently holds the frame pointer for our calling frame. If
|
|
we're at the start of a function, or somewhere half-way its
|
|
prologue, the function's frame probably hasn't been fully
|
|
setup yet. Try to reconstruct the base address for the stack
|
|
frame by looking at the stack pointer. For truly "frameless"
|
|
functions this might work too. */
|
|
cache->base = frame_unwind_register_unsigned (next_frame, E_SP_REGNUM);
|
|
}
|
|
|
|
/* Now that we have the base address for the stack frame we can
|
|
calculate the value of sp in the calling frame. */
|
|
trad_frame_set_value (cache->saved_regs, E_SP_REGNUM,
|
|
cache->base - cache->sp_offset);
|
|
|
|
/* Adjust all the saved registers such that they contain addresses
|
|
instead of offsets. */
|
|
for (i = 0; i < E_NUM_REGS; i++)
|
|
if (trad_frame_addr_p (cache->saved_regs, i))
|
|
cache->saved_regs[i].addr += cache->base;
|
|
|
|
/* The call instruction moves the caller's PC in the callee's LP.
|
|
Since this is an unwind, do the reverse. Copy the location of LP
|
|
into PC (the address / regnum) so that a request for PC will be
|
|
converted into a request for the LP. */
|
|
|
|
cache->saved_regs[E_PC_REGNUM] = cache->saved_regs[E_LP_REGNUM];
|
|
|
|
return cache;
|
|
}
|
|
|
|
|
|
static void
|
|
v850_frame_prev_register (struct frame_info *next_frame, void **this_cache,
|
|
int regnum, int *optimizedp,
|
|
enum lval_type *lvalp, CORE_ADDR *addrp,
|
|
int *realnump, gdb_byte *valuep)
|
|
{
|
|
struct v850_frame_cache *cache = v850_frame_cache (next_frame, this_cache);
|
|
|
|
gdb_assert (regnum >= 0);
|
|
|
|
trad_frame_get_prev_register (next_frame, cache->saved_regs, regnum,
|
|
optimizedp, lvalp, addrp, realnump, valuep);
|
|
}
|
|
|
|
static void
|
|
v850_frame_this_id (struct frame_info *next_frame, void **this_cache,
|
|
struct frame_id *this_id)
|
|
{
|
|
struct v850_frame_cache *cache = v850_frame_cache (next_frame, this_cache);
|
|
|
|
/* This marks the outermost frame. */
|
|
if (cache->base == 0)
|
|
return;
|
|
|
|
*this_id = frame_id_build (cache->saved_regs[E_SP_REGNUM].addr, cache->pc);
|
|
}
|
|
|
|
static const struct frame_unwind v850_frame_unwind = {
|
|
NORMAL_FRAME,
|
|
v850_frame_this_id,
|
|
v850_frame_prev_register
|
|
};
|
|
|
|
static const struct frame_unwind *
|
|
v850_frame_sniffer (struct frame_info *next_frame)
|
|
{
|
|
return &v850_frame_unwind;
|
|
}
|
|
|
|
static CORE_ADDR
|
|
v850_unwind_sp (struct gdbarch *gdbarch, struct frame_info *next_frame)
|
|
{
|
|
return frame_unwind_register_unsigned (next_frame,
|
|
gdbarch_sp_regnum (gdbarch));
|
|
}
|
|
|
|
static CORE_ADDR
|
|
v850_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
|
|
{
|
|
return frame_unwind_register_unsigned (next_frame,
|
|
gdbarch_pc_regnum (gdbarch));
|
|
}
|
|
|
|
static struct frame_id
|
|
v850_unwind_dummy_id (struct gdbarch *gdbarch, struct frame_info *next_frame)
|
|
{
|
|
return frame_id_build (v850_unwind_sp (gdbarch, next_frame),
|
|
frame_pc_unwind (next_frame));
|
|
}
|
|
|
|
static CORE_ADDR
|
|
v850_frame_base_address (struct frame_info *next_frame, void **this_cache)
|
|
{
|
|
struct v850_frame_cache *cache = v850_frame_cache (next_frame, this_cache);
|
|
|
|
return cache->base;
|
|
}
|
|
|
|
static const struct frame_base v850_frame_base = {
|
|
&v850_frame_unwind,
|
|
v850_frame_base_address,
|
|
v850_frame_base_address,
|
|
v850_frame_base_address
|
|
};
|
|
|
|
static struct gdbarch *
|
|
v850_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
|
|
{
|
|
struct gdbarch *gdbarch;
|
|
|
|
/* Change the register names based on the current machine type. */
|
|
if (info.bfd_arch_info->arch != bfd_arch_v850)
|
|
return NULL;
|
|
|
|
gdbarch = gdbarch_alloc (&info, NULL);
|
|
|
|
switch (info.bfd_arch_info->mach)
|
|
{
|
|
case bfd_mach_v850:
|
|
set_gdbarch_register_name (gdbarch, v850_register_name);
|
|
break;
|
|
case bfd_mach_v850e:
|
|
case bfd_mach_v850e1:
|
|
set_gdbarch_register_name (gdbarch, v850e_register_name);
|
|
break;
|
|
}
|
|
|
|
set_gdbarch_num_regs (gdbarch, E_NUM_REGS);
|
|
set_gdbarch_num_pseudo_regs (gdbarch, 0);
|
|
set_gdbarch_sp_regnum (gdbarch, E_SP_REGNUM);
|
|
set_gdbarch_pc_regnum (gdbarch, E_PC_REGNUM);
|
|
set_gdbarch_fp0_regnum (gdbarch, -1);
|
|
|
|
set_gdbarch_register_type (gdbarch, v850_register_type);
|
|
|
|
set_gdbarch_char_signed (gdbarch, 0);
|
|
set_gdbarch_short_bit (gdbarch, 2 * TARGET_CHAR_BIT);
|
|
set_gdbarch_int_bit (gdbarch, 4 * TARGET_CHAR_BIT);
|
|
set_gdbarch_long_bit (gdbarch, 4 * TARGET_CHAR_BIT);
|
|
set_gdbarch_long_long_bit (gdbarch, 8 * TARGET_CHAR_BIT);
|
|
|
|
set_gdbarch_float_bit (gdbarch, 4 * TARGET_CHAR_BIT);
|
|
set_gdbarch_double_bit (gdbarch, 8 * TARGET_CHAR_BIT);
|
|
set_gdbarch_long_double_bit (gdbarch, 8 * TARGET_CHAR_BIT);
|
|
|
|
set_gdbarch_ptr_bit (gdbarch, 4 * TARGET_CHAR_BIT);
|
|
set_gdbarch_addr_bit (gdbarch, 4 * TARGET_CHAR_BIT);
|
|
|
|
set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
|
|
set_gdbarch_breakpoint_from_pc (gdbarch, v850_breakpoint_from_pc);
|
|
|
|
set_gdbarch_return_value (gdbarch, v850_return_value);
|
|
set_gdbarch_push_dummy_call (gdbarch, v850_push_dummy_call);
|
|
set_gdbarch_skip_prologue (gdbarch, v850_skip_prologue);
|
|
|
|
set_gdbarch_print_insn (gdbarch, print_insn_v850);
|
|
|
|
set_gdbarch_frame_align (gdbarch, v850_frame_align);
|
|
set_gdbarch_unwind_sp (gdbarch, v850_unwind_sp);
|
|
set_gdbarch_unwind_pc (gdbarch, v850_unwind_pc);
|
|
set_gdbarch_unwind_dummy_id (gdbarch, v850_unwind_dummy_id);
|
|
frame_base_set_default (gdbarch, &v850_frame_base);
|
|
|
|
/* Hook in ABI-specific overrides, if they have been registered. */
|
|
gdbarch_init_osabi (info, gdbarch);
|
|
|
|
frame_unwind_append_sniffer (gdbarch, dwarf2_frame_sniffer);
|
|
frame_unwind_append_sniffer (gdbarch, v850_frame_sniffer);
|
|
|
|
return gdbarch;
|
|
}
|
|
|
|
extern initialize_file_ftype _initialize_v850_tdep; /* -Wmissing-prototypes */
|
|
|
|
void
|
|
_initialize_v850_tdep (void)
|
|
{
|
|
register_gdbarch_init (bfd_arch_v850, v850_gdbarch_init);
|
|
}
|