f30ee0bc4f
* gdbarch.sh (DEPRECATED_FRAME_INIT_SAVED_REGS): Rename FRAME_INIT_SAVED_REGS. * gdbarch.h, gdbarch.c: Regenerate. * stack.c (frame_info): Update. * sh-tdep.c (sh_find_callers_reg, sh64_get_saved_pr): Update. (sh_init_extra_frame_info, sh64_init_extra_frame_info): Update. (sh64_get_saved_register, sh_pop_frame, sh64_pop_frame): Update. * ns32k-tdep.c (ns32k_pop_frame): Update. * mips-tdep.c (mips_pop_frame): Update. * m68hc11-tdep.c (m68hc11_pop_frame): Update. * ia64-tdep.c (ia64_frame_chain): Update. (ia64_frame_saved_pc, ia64_get_saved_register): Update. (ia64_frameless_function_invocation): Update. (ia64_init_extra_frame_info): Update. (ia64_pop_frame_regular): Update. * frame.h (struct frame_info): Update comment. (DEPRECATED_FRAME_INIT_SAVED_REGS): Rename macro. * frame.c (frame_saved_regs_register_unwind): Update. (frame_saved_regs_register_unwind): Update. (deprecated_generic_get_saved_register): Update. * cris-tdep.c: Update comment. * config/sparc/tm-sparc.h (DEPRECATED_FRAME_INIT_SAVED_REGS): Rename macro. * xstormy16-tdep.c (xstormy16_gdbarch_init): Update. * x86-64-tdep.c (x86_64_init_abi): Update. * vax-tdep.c (vax_gdbarch_init): Update. * v850-tdep.c (v850_gdbarch_init): Update. * sparc-tdep.c (sparc_gdbarch_init): Update. * sh-tdep.c (sh_gdbarch_init): Update. * s390-tdep.c (s390_gdbarch_init): Update. * rs6000-tdep.c (rs6000_gdbarch_init): Update. * ppc-linux-tdep.c (ppc_linux_init_abi): Update. * ns32k-tdep.c (ns32k_gdbarch_init): Update. * mn10300-tdep.c (mn10300_gdbarch_init): Update. * mips-tdep.c (mips_gdbarch_init): Update. * mcore-tdep.c (mcore_gdbarch_init): Update. * m68k-tdep.c (m68k_gdbarch_init): Update. * m68hc11-tdep.c (m68hc11_gdbarch_init): Update. * ia64-tdep.c (ia64_gdbarch_init): Update. * i386-tdep.c (i386_gdbarch_init): Update. * frv-tdep.c (frv_gdbarch_init): Update. * avr-tdep.c (avr_gdbarch_init): Update. * arm-tdep.c (arm_gdbarch_init): Update. * alpha-tdep.c (alpha_gdbarch_init): Update. 2003-03-01 Andrew Cagney <cagney@redhat.com> * gdbint.texinfo (Target Architecture Definition): Rename FRAME_INIT_SAVED_REGS to DEPRECATED_FRAME_INIT_SAVED_REGS.
1308 lines
38 KiB
C
1308 lines
38 KiB
C
/* Target-dependent code for the NEC V850 for GDB, the GNU debugger.
|
||
Copyright 1996, 1998, 1999, 2000, 2001, 2002, 2003
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||
Free Software Foundation, Inc.
|
||
|
||
This file is part of GDB.
|
||
|
||
This program is free software; you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation; either version 2 of the License, or
|
||
(at your option) any later version.
|
||
|
||
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
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with this program; if not, write to the Free Software
|
||
Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "frame.h"
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#include "inferior.h"
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#include "target.h"
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#include "value.h"
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#include "bfd.h"
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#include "gdb_string.h"
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#include "gdbcore.h"
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#include "symfile.h"
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#include "arch-utils.h"
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#include "regcache.h"
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#include "symtab.h"
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struct gdbarch_tdep
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{
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/* gdbarch target dependent data here. Currently unused for v850. */
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};
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/* Extra info which is saved in each frame_info. */
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struct frame_extra_info
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{
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};
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enum {
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E_R0_REGNUM,
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E_R1_REGNUM,
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E_R2_REGNUM, E_SAVE1_START_REGNUM = E_R2_REGNUM, E_SAVE1_END_REGNUM = 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, E_SAVE2_START_REGNUM = 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_SAVE2_END_REGNUM = E_R29_REGNUM, E_FP_RAW_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_SAVE3_START_REGNUM = E_R31_REGNUM, E_SAVE3_END_REGNUM = E_R31_REGNUM, E_RP_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, E_FP_REGNUM = 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 all registers as a whole. */
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enum
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{
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E_ALL_REGS_SIZE = (E_NUM_REGS) * v850_reg_size
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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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static LONGEST call_dummy_nil[] = {0};
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static char *v850_generic_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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static 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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char **v850_register_names = v850_generic_reg_names;
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struct
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{
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char **regnames;
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int mach;
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}
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v850_processor_type_table[] =
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{
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{
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v850_generic_reg_names, bfd_mach_v850
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}
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,
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{
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v850e_reg_names, bfd_mach_v850e
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}
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,
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{
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NULL, 0
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}
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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 reg */
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{
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int framereg; /* Frame reg (SP or FP) */
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int offset; /* Offset from framereg */
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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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struct prologue_info
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{
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int framereg;
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int frameoffset;
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int start_function;
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struct pifsr *pifsrs;
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};
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static CORE_ADDR v850_scan_prologue (CORE_ADDR pc, struct prologue_info *fs);
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/* Function: v850_register_name
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Returns the name of the v850/v850e register N. */
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static const char *
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v850_register_name (int regnum)
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{
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if (regnum < 0 || regnum >= E_NUM_REGS)
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internal_error (__FILE__, __LINE__,
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"v850_register_name: illegal register number %d",
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regnum);
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else
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return v850_register_names[regnum];
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}
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/* Function: v850_register_byte
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Returns the byte position in the register cache for register N. */
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static int
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v850_register_byte (int regnum)
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{
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if (regnum < 0 || regnum >= E_NUM_REGS)
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internal_error (__FILE__, __LINE__,
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"v850_register_byte: illegal register number %d",
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regnum);
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else
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return regnum * v850_reg_size;
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}
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/* Function: v850_register_raw_size
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Returns the number of bytes occupied by the register on the target. */
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static int
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v850_register_raw_size (int regnum)
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{
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if (regnum < 0 || regnum >= E_NUM_REGS)
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internal_error (__FILE__, __LINE__,
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"v850_register_raw_size: illegal register number %d",
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regnum);
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/* Only the PC has 4 Byte, all other registers 2 Byte. */
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else
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return v850_reg_size;
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}
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/* Function: v850_register_virtual_size
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Returns the number of bytes occupied by the register as represented
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internally by gdb. */
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static int
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v850_register_virtual_size (int regnum)
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{
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return v850_register_raw_size (regnum);
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}
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/* Function: v850_reg_virtual_type
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Returns the default type for register N. */
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static struct type *
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v850_reg_virtual_type (int regnum)
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{
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if (regnum < 0 || regnum >= E_NUM_REGS)
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internal_error (__FILE__, __LINE__,
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"v850_register_virtual_type: illegal register number %d",
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regnum);
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else if (regnum == E_PC_REGNUM)
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return builtin_type_uint32;
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else
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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 (int gcc_p, struct type *type)
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{
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/* According to ABI:
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* return TYPE_LENGTH (type) > 8);
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*/
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/* Current implementation in gcc: */
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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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||
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/* The value is a structure or union with a single element
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* and that element is either a single basic type or an array of
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* a single basic type whoes size is greater than or equal to 4
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* -> 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
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* a float, and which contains no arrays of more than two elements
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* -> returned in 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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||
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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||
return 0;
|
||
}
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||
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||
/* The value is a union which contains at least one field which
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||
* would be returned in registers according to these rules
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* -> 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 (0, fld_type))
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return 0;
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||
}
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||
}
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||
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return 1;
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||
}
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||
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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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||
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||
static void
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handle_prepare (int insn, int insn2, CORE_ADDR * current_pc_ptr,
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struct prologue_info *pi, struct pifsr **pifsr_ptr)
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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 */
|
||
{0x08000, 24}, /* r24 */
|
||
{0x04000, 25}, /* r25 */
|
||
{0x02000, 26}, /* r26 */
|
||
{0x01000, 27}, /* r27 */
|
||
{0x00080, 28}, /* r28 */
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||
{0x00040, 29}, /* r29 */
|
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{0x10000, 30}, /* ep */
|
||
{0x00020, 31}, /* lp */
|
||
{0, 0} /* end of table */
|
||
};
|
||
int i;
|
||
|
||
if ((next & 0x1f) == 0x0b) /* skip imm16 argument */
|
||
current_pc += 2;
|
||
else if ((next & 0x1f) == 0x13) /* skip imm16 argument */
|
||
current_pc += 2;
|
||
else if ((next & 0x1f) == 0x1b) /* skip imm32 argument */
|
||
current_pc += 4;
|
||
|
||
/* Calculate the total size of the saved registers, and add it
|
||
it to the immediate value used to adjust SP. */
|
||
for (i = 0; reg_table[i].mask != 0; i++)
|
||
if (list12 & reg_table[i].mask)
|
||
offset += v850_register_raw_size (reg_table[i].regno);
|
||
pi->frameoffset -= offset;
|
||
|
||
/* Calculate the offsets of the registers relative to the value
|
||
the SP will have after the registers have been pushed and the
|
||
imm5 value has been subtracted from it. */
|
||
if (pifsr)
|
||
{
|
||
for (i = 0; reg_table[i].mask != 0; i++)
|
||
{
|
||
if (list12 & reg_table[i].mask)
|
||
{
|
||
int reg = reg_table[i].regno;
|
||
offset -= v850_register_raw_size (reg);
|
||
pifsr->reg = reg;
|
||
pifsr->offset = offset;
|
||
pifsr->cur_frameoffset = pi->frameoffset;
|
||
#ifdef DEBUG
|
||
printf_filtered ("\tSaved register r%d, offset %d", reg, pifsr->offset);
|
||
#endif
|
||
pifsr++;
|
||
}
|
||
}
|
||
}
|
||
#ifdef DEBUG
|
||
printf_filtered ("\tfound ctret after regsave func");
|
||
#endif
|
||
|
||
/* Set result parameters. */
|
||
*current_pc_ptr = current_pc;
|
||
*pifsr_ptr = pifsr;
|
||
}
|
||
|
||
|
||
/* Helper function for v850_scan_prologue to handle pushm/pushl instructions.
|
||
FIXME: the SR bit of the register list is not supported; must check
|
||
that the compiler does not ever generate this bit. */
|
||
|
||
static void
|
||
handle_pushm (int insn, int insn2, struct prologue_info *pi,
|
||
struct pifsr **pifsr_ptr)
|
||
{
|
||
struct pifsr *pifsr = *pifsr_ptr;
|
||
long list12 = ((insn & 0x0f) << 16) + (insn2 & 0xfff0);
|
||
long offset = 0;
|
||
static struct reg_list pushml_reg_table[] =
|
||
{
|
||
{0x80000, E_PS_REGNUM}, /* PSW */
|
||
{0x40000, 1}, /* r1 */
|
||
{0x20000, 2}, /* r2 */
|
||
{0x10000, 3}, /* r3 */
|
||
{0x00800, 4}, /* r4 */
|
||
{0x00400, 5}, /* r5 */
|
||
{0x00200, 6}, /* r6 */
|
||
{0x00100, 7}, /* r7 */
|
||
{0x08000, 8}, /* r8 */
|
||
{0x04000, 9}, /* r9 */
|
||
{0x02000, 10}, /* r10 */
|
||
{0x01000, 11}, /* r11 */
|
||
{0x00080, 12}, /* r12 */
|
||
{0x00040, 13}, /* r13 */
|
||
{0x00020, 14}, /* r14 */
|
||
{0x00010, 15}, /* r15 */
|
||
{0, 0} /* end of table */
|
||
};
|
||
static struct reg_list pushmh_reg_table[] =
|
||
{
|
||
{0x80000, 16}, /* r16 */
|
||
{0x40000, 17}, /* r17 */
|
||
{0x20000, 18}, /* r18 */
|
||
{0x10000, 19}, /* r19 */
|
||
{0x00800, 20}, /* r20 */
|
||
{0x00400, 21}, /* r21 */
|
||
{0x00200, 22}, /* r22 */
|
||
{0x00100, 23}, /* r23 */
|
||
{0x08000, 24}, /* r24 */
|
||
{0x04000, 25}, /* r25 */
|
||
{0x02000, 26}, /* r26 */
|
||
{0x01000, 27}, /* r27 */
|
||
{0x00080, 28}, /* r28 */
|
||
{0x00040, 29}, /* r29 */
|
||
{0x00010, 30}, /* r30 */
|
||
{0x00020, 31}, /* r31 */
|
||
{0, 0} /* end of table */
|
||
};
|
||
struct reg_list *reg_table;
|
||
int i;
|
||
|
||
/* Is this a pushml or a pushmh? */
|
||
if ((insn2 & 7) == 1)
|
||
reg_table = pushml_reg_table;
|
||
else
|
||
reg_table = pushmh_reg_table;
|
||
|
||
/* Calculate the total size of the saved registers, and add it
|
||
it to the immediate value used to adjust SP. */
|
||
for (i = 0; reg_table[i].mask != 0; i++)
|
||
if (list12 & reg_table[i].mask)
|
||
offset += v850_register_raw_size (reg_table[i].regno);
|
||
pi->frameoffset -= offset;
|
||
|
||
/* Calculate the offsets of the registers relative to the value
|
||
the SP will have after the registers have been pushed and the
|
||
imm5 value is subtracted from it. */
|
||
if (pifsr)
|
||
{
|
||
for (i = 0; reg_table[i].mask != 0; i++)
|
||
{
|
||
if (list12 & reg_table[i].mask)
|
||
{
|
||
int reg = reg_table[i].regno;
|
||
offset -= v850_register_raw_size (reg);
|
||
pifsr->reg = reg;
|
||
pifsr->offset = offset;
|
||
pifsr->cur_frameoffset = pi->frameoffset;
|
||
#ifdef DEBUG
|
||
printf_filtered ("\tSaved register r%d, offset %d", reg, pifsr->offset);
|
||
#endif
|
||
pifsr++;
|
||
}
|
||
}
|
||
}
|
||
#ifdef DEBUG
|
||
printf_filtered ("\tfound ctret after regsave func");
|
||
#endif
|
||
|
||
/* Set result parameters. */
|
||
*pifsr_ptr = pifsr;
|
||
}
|
||
|
||
|
||
|
||
|
||
/* Function: scan_prologue
|
||
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_scan_prologue (CORE_ADDR pc, struct prologue_info *pi)
|
||
{
|
||
CORE_ADDR func_addr, prologue_end, current_pc;
|
||
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;
|
||
|
||
/* First, figure out the bounds of the prologue so that we can limit the
|
||
search to something reasonable. */
|
||
|
||
if (find_pc_partial_function (pc, NULL, &func_addr, NULL))
|
||
{
|
||
struct symtab_and_line sal;
|
||
|
||
sal = find_pc_line (func_addr, 0);
|
||
|
||
if (func_addr == entry_point_address ())
|
||
pi->start_function = 1;
|
||
else
|
||
pi->start_function = 0;
|
||
|
||
#if 0
|
||
if (sal.line == 0)
|
||
prologue_end = pc;
|
||
else
|
||
prologue_end = sal.end;
|
||
#else
|
||
prologue_end = pc;
|
||
#endif
|
||
}
|
||
else
|
||
{ /* We're in the boondocks */
|
||
func_addr = pc - 100;
|
||
prologue_end = pc;
|
||
}
|
||
|
||
prologue_end = min (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->frameoffset = 0;
|
||
pi->framereg = E_SP_REGNUM;
|
||
fp_used = 0;
|
||
ep_used = 0;
|
||
pifsr = pi->pifsrs;
|
||
regsave_func_p = 0;
|
||
save_pc = 0;
|
||
save_end = 0;
|
||
r12_tmp = 0;
|
||
|
||
#ifdef DEBUG
|
||
printf_filtered ("Current_pc = 0x%.8lx, prologue_end = 0x%.8lx\n",
|
||
(long) func_addr, (long) prologue_end);
|
||
#endif
|
||
|
||
for (current_pc = func_addr; current_pc < prologue_end;)
|
||
{
|
||
int insn;
|
||
int insn2 = -1; /* dummy value */
|
||
|
||
#ifdef DEBUG
|
||
printf_filtered ("0x%.8lx ", (long) current_pc);
|
||
TARGET_PRINT_INSN (current_pc, &tm_print_insn_info);
|
||
#endif
|
||
|
||
insn = read_memory_unsigned_integer (current_pc, 2);
|
||
current_pc += 2;
|
||
if ((insn & 0x0780) >= 0x0600) /* Four byte instruction? */
|
||
{
|
||
insn2 = read_memory_unsigned_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 */
|
||
|
||
#ifdef DEBUG
|
||
printf_filtered ("\tfound jarl <func>,r10, disp = %ld, low_disp = %ld, new pc = 0x%.8lx\n",
|
||
disp, low_disp, (long) current_pc + 2);
|
||
#endif
|
||
continue;
|
||
}
|
||
else if ((insn & 0xffc0) == 0x0200 && !regsave_func_p)
|
||
{ /* callt <imm6> */
|
||
long ctbp = read_register (E_CTBP_REGNUM);
|
||
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 */
|
||
|
||
#ifdef DEBUG
|
||
printf_filtered ("\tfound callt, ctbp = 0x%.8lx, adr = %.8lx, new pc = 0x%.8lx\n",
|
||
ctbp, adr, (long) current_pc);
|
||
#endif
|
||
continue;
|
||
}
|
||
else if ((insn & 0xffc0) == 0x0780) /* prepare list2,imm5 */
|
||
{
|
||
handle_prepare (insn, insn2, ¤t_pc, pi, &pifsr);
|
||
continue;
|
||
}
|
||
else if (insn == 0x07e0 && regsave_func_p && insn2 == 0x0144)
|
||
{ /* ctret after processing register save function */
|
||
current_pc = save_pc;
|
||
prologue_end = save_end;
|
||
regsave_func_p = 0;
|
||
#ifdef DEBUG
|
||
printf_filtered ("\tfound ctret after regsave func");
|
||
#endif
|
||
continue;
|
||
}
|
||
else if ((insn & 0xfff0) == 0x07e0 && (insn2 & 5) == 1)
|
||
{ /* pushml, pushmh */
|
||
handle_pushm (insn, insn2, pi, &pifsr);
|
||
continue;
|
||
}
|
||
else if ((insn & 0xffe0) == 0x0060 && regsave_func_p)
|
||
{ /* jmp after processing register save function */
|
||
current_pc = save_pc;
|
||
prologue_end = save_end;
|
||
regsave_func_p = 0;
|
||
#ifdef DEBUG
|
||
printf_filtered ("\tfound jmp after regsave func");
|
||
#endif
|
||
continue;
|
||
}
|
||
else if ((insn & 0x07c0) == 0x0780 /* jarl or jr */
|
||
|| (insn & 0xffe0) == 0x0060 /* jmp */
|
||
|| (insn & 0x0780) == 0x0580) /* branch */
|
||
{
|
||
#ifdef DEBUG
|
||
printf_filtered ("\n");
|
||
#endif
|
||
break; /* Ran into end of prologue */
|
||
}
|
||
|
||
else if ((insn & 0xffe0) == ((E_SP_REGNUM << 11) | 0x0240)) /* add <imm>,sp */
|
||
pi->frameoffset += ((insn & 0x1f) ^ 0x10) - 0x10;
|
||
else if (insn == ((E_SP_REGNUM << 11) | 0x0600 | E_SP_REGNUM)) /* addi <imm>,sp,sp */
|
||
pi->frameoffset += insn2;
|
||
else if (insn == ((E_FP_RAW_REGNUM << 11) | 0x0000 | E_SP_REGNUM)) /* mov sp,fp */
|
||
{
|
||
fp_used = 1;
|
||
pi->framereg = E_FP_RAW_REGNUM;
|
||
}
|
||
|
||
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->frameoffset = 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) /* st.w <reg>,<offset>[sp] */
|
||
|| (fp_used
|
||
&& (insn & 0x07ff) == (0x0760 | E_FP_RAW_REGNUM))) /* st.w <reg>,<offset>[fp] */
|
||
&& pifsr
|
||
&& (((reg = (insn >> 11) & 0x1f) >= E_SAVE1_START_REGNUM && reg <= E_SAVE1_END_REGNUM)
|
||
|| (reg >= E_SAVE2_START_REGNUM && reg <= E_SAVE2_END_REGNUM)
|
||
|| (reg >= E_SAVE3_START_REGNUM && reg <= E_SAVE3_END_REGNUM)))
|
||
{
|
||
pifsr->reg = reg;
|
||
pifsr->offset = insn2 & ~1;
|
||
pifsr->cur_frameoffset = pi->frameoffset;
|
||
#ifdef DEBUG
|
||
printf_filtered ("\tSaved register r%d, offset %d", reg, pifsr->offset);
|
||
#endif
|
||
pifsr++;
|
||
}
|
||
|
||
else if (ep_used /* sst.w <reg>,<offset>[ep] */
|
||
&& ((insn & 0x0781) == 0x0501)
|
||
&& pifsr
|
||
&& (((reg = (insn >> 11) & 0x1f) >= E_SAVE1_START_REGNUM && reg <= E_SAVE1_END_REGNUM)
|
||
|| (reg >= E_SAVE2_START_REGNUM && reg <= E_SAVE2_END_REGNUM)
|
||
|| (reg >= E_SAVE3_START_REGNUM && reg <= E_SAVE3_END_REGNUM)))
|
||
{
|
||
pifsr->reg = reg;
|
||
pifsr->offset = (insn & 0x007e) << 1;
|
||
pifsr->cur_frameoffset = pi->frameoffset;
|
||
#ifdef DEBUG
|
||
printf_filtered ("\tSaved register r%d, offset %d", reg, pifsr->offset);
|
||
#endif
|
||
pifsr++;
|
||
}
|
||
|
||
#ifdef DEBUG
|
||
printf_filtered ("\n");
|
||
#endif
|
||
}
|
||
|
||
if (pifsr)
|
||
pifsr->framereg = 0; /* Tie off last entry */
|
||
|
||
/* Fix up any offsets to the final offset. If a frame pointer was created, use it
|
||
instead of the stack pointer. */
|
||
for (pifsr_tmp = pi->pifsrs; pifsr_tmp && pifsr_tmp != pifsr; pifsr_tmp++)
|
||
{
|
||
pifsr_tmp->offset -= pi->frameoffset - pifsr_tmp->cur_frameoffset;
|
||
pifsr_tmp->framereg = pi->framereg;
|
||
|
||
#ifdef DEBUG
|
||
printf_filtered ("Saved register r%d, offset = %d, framereg = r%d\n",
|
||
pifsr_tmp->reg, pifsr_tmp->offset, pifsr_tmp->framereg);
|
||
#endif
|
||
}
|
||
|
||
#ifdef DEBUG
|
||
printf_filtered ("Framereg = r%d, frameoffset = %d\n", pi->framereg, pi->frameoffset);
|
||
#endif
|
||
|
||
return current_pc;
|
||
}
|
||
|
||
/* Function: find_callers_reg
|
||
Find REGNUM on the stack. Otherwise, it's in an active register.
|
||
One thing we might want to do here is to check REGNUM against the
|
||
clobber mask, and somehow flag it as invalid if it isn't saved on
|
||
the stack somewhere. This would provide a graceful failure mode
|
||
when trying to get the value of caller-saves registers for an inner
|
||
frame. */
|
||
|
||
CORE_ADDR
|
||
v850_find_callers_reg (struct frame_info *fi, int regnum)
|
||
{
|
||
for (; fi; fi = get_next_frame (fi))
|
||
if (DEPRECATED_PC_IN_CALL_DUMMY (get_frame_pc (fi), get_frame_base (fi),
|
||
get_frame_base (fi)))
|
||
return deprecated_read_register_dummy (get_frame_pc (fi),
|
||
get_frame_base (fi), regnum);
|
||
else if (get_frame_saved_regs (fi)[regnum] != 0)
|
||
return read_memory_unsigned_integer (get_frame_saved_regs (fi)[regnum],
|
||
v850_register_raw_size (regnum));
|
||
|
||
return read_register (regnum);
|
||
}
|
||
|
||
/* Function: frame_chain
|
||
Figure out the frame prior to FI. Unfortunately, this involves
|
||
scanning the prologue of the caller, which will also be done
|
||
shortly by v850_init_extra_frame_info. For the dummy frame, we
|
||
just return the stack pointer that was in use at the time the
|
||
function call was made. */
|
||
|
||
CORE_ADDR
|
||
v850_frame_chain (struct frame_info *fi)
|
||
{
|
||
struct prologue_info pi;
|
||
CORE_ADDR callers_pc, fp;
|
||
|
||
/* First, find out who called us */
|
||
callers_pc = FRAME_SAVED_PC (fi);
|
||
/* If caller is a call-dummy, then our FP bears no relation to his FP! */
|
||
fp = v850_find_callers_reg (fi, E_FP_RAW_REGNUM);
|
||
if (DEPRECATED_PC_IN_CALL_DUMMY (callers_pc, fp, fp))
|
||
return fp; /* caller is call-dummy: return oldest value of FP */
|
||
|
||
/* Caller is NOT a call-dummy, so everything else should just work.
|
||
Even if THIS frame is a call-dummy! */
|
||
pi.pifsrs = NULL;
|
||
|
||
v850_scan_prologue (callers_pc, &pi);
|
||
|
||
if (pi.start_function)
|
||
return 0; /* Don't chain beyond the start function */
|
||
|
||
if (pi.framereg == E_FP_RAW_REGNUM)
|
||
return v850_find_callers_reg (fi, pi.framereg);
|
||
|
||
return get_frame_base (fi) - pi.frameoffset;
|
||
}
|
||
|
||
/* Function: skip_prologue
|
||
Return the address of the first code past the prologue of the function. */
|
||
|
||
CORE_ADDR
|
||
v850_skip_prologue (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;
|
||
else
|
||
/* 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;
|
||
}
|
||
|
||
/* Function: pop_frame
|
||
This routine gets called when either the user uses the `return'
|
||
command, or the call dummy breakpoint gets hit. */
|
||
|
||
void
|
||
v850_pop_frame (void)
|
||
{
|
||
struct frame_info *frame = get_current_frame ();
|
||
int regnum;
|
||
|
||
if (DEPRECATED_PC_IN_CALL_DUMMY (get_frame_pc (frame),
|
||
get_frame_base (frame),
|
||
get_frame_base (frame)))
|
||
generic_pop_dummy_frame ();
|
||
else
|
||
{
|
||
write_register (E_PC_REGNUM, FRAME_SAVED_PC (frame));
|
||
|
||
for (regnum = 0; regnum < E_NUM_REGS; regnum++)
|
||
if (get_frame_saved_regs (frame)[regnum] != 0)
|
||
write_register (regnum,
|
||
read_memory_unsigned_integer (get_frame_saved_regs (frame)[regnum],
|
||
v850_register_raw_size (regnum)));
|
||
|
||
write_register (E_SP_REGNUM, get_frame_base (frame));
|
||
}
|
||
|
||
flush_cached_frames ();
|
||
}
|
||
|
||
/* Function: push_arguments
|
||
Setup arguments and RP 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.
|
||
*/
|
||
|
||
CORE_ADDR
|
||
v850_push_arguments (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;
|
||
|
||
/* First, just for safety, make sure stack is aligned */
|
||
sp &= ~3;
|
||
|
||
/* 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.
|
||
I don't really know why, that's just the way it seems to work. */
|
||
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; /* possibly over-allocating, but it works... */
|
||
/* (you might think we could allocate 16 bytes */
|
||
/* less, but the ABI seems to use it all! ) */
|
||
|
||
argreg = E_ARG0_REGNUM;
|
||
/* the struct_return pointer occupies the first parameter-passing reg */
|
||
if (struct_return)
|
||
argreg++;
|
||
|
||
/* 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;
|
||
char *val;
|
||
char valbuf[v850_register_raw_size (E_ARG0_REGNUM)];
|
||
|
||
if (!v850_type_is_scalar (VALUE_TYPE (*args))
|
||
&& TYPE_LENGTH (VALUE_TYPE (*args)) > E_MAX_RETTYPE_SIZE_IN_REGS)
|
||
{
|
||
store_address (valbuf, 4, VALUE_ADDRESS (*args));
|
||
len = 4;
|
||
val = valbuf;
|
||
}
|
||
else
|
||
{
|
||
len = TYPE_LENGTH (VALUE_TYPE (*args));
|
||
val = (char *) VALUE_CONTENTS (*args);
|
||
}
|
||
|
||
while (len > 0)
|
||
if (argreg <= E_ARGLAST_REGNUM)
|
||
{
|
||
CORE_ADDR regval;
|
||
|
||
regval = extract_address (val, v850_register_raw_size (argreg));
|
||
write_register (argreg, regval);
|
||
|
||
len -= v850_register_raw_size (argreg);
|
||
val += v850_register_raw_size (argreg);
|
||
argreg++;
|
||
}
|
||
else
|
||
{
|
||
write_memory (sp + stack_offset, val, 4);
|
||
|
||
len -= 4;
|
||
val += 4;
|
||
stack_offset += 4;
|
||
}
|
||
args++;
|
||
}
|
||
return sp;
|
||
}
|
||
|
||
/* Function: push_return_address (pc)
|
||
Set up the return address for the inferior function call.
|
||
Needed for targets where we don't actually execute a JSR/BSR instruction */
|
||
|
||
CORE_ADDR
|
||
v850_push_return_address (CORE_ADDR pc, CORE_ADDR sp)
|
||
{
|
||
write_register (E_RP_REGNUM, CALL_DUMMY_ADDRESS ());
|
||
return sp;
|
||
}
|
||
|
||
/* Function: frame_saved_pc
|
||
Find the caller of this frame. We do this by seeing if E_RP_REGNUM
|
||
is saved in the stack anywhere, otherwise we get it from the
|
||
registers. If the inner frame is a dummy frame, return its PC
|
||
instead of RP, because that's where "caller" of the dummy-frame
|
||
will be found. */
|
||
|
||
CORE_ADDR
|
||
v850_frame_saved_pc (struct frame_info *fi)
|
||
{
|
||
if (DEPRECATED_PC_IN_CALL_DUMMY (get_frame_pc (fi), get_frame_base (fi),
|
||
get_frame_base (fi)))
|
||
return deprecated_read_register_dummy (get_frame_pc (fi),
|
||
get_frame_base (fi), E_PC_REGNUM);
|
||
else
|
||
return v850_find_callers_reg (fi, E_RP_REGNUM);
|
||
}
|
||
|
||
|
||
/* Function: fix_call_dummy
|
||
Pokes the callee function's address into the CALL_DUMMY assembly stub.
|
||
Assumes that the CALL_DUMMY looks like this:
|
||
jarl <offset24>, r31
|
||
trap
|
||
*/
|
||
|
||
void
|
||
v850_fix_call_dummy (char *dummy, CORE_ADDR sp, CORE_ADDR fun, int nargs,
|
||
struct value **args, struct type *type, int gcc_p)
|
||
{
|
||
long offset24;
|
||
|
||
offset24 = (long) fun - (long) entry_point_address ();
|
||
offset24 &= 0x3fffff;
|
||
offset24 |= 0xff800000; /* jarl <offset24>, r31 */
|
||
|
||
store_unsigned_integer ((unsigned int *) &dummy[2], 2, offset24 & 0xffff);
|
||
store_unsigned_integer ((unsigned int *) &dummy[0], 2, offset24 >> 16);
|
||
}
|
||
|
||
static CORE_ADDR
|
||
v850_saved_pc_after_call (struct frame_info *ignore)
|
||
{
|
||
return read_register (E_RP_REGNUM);
|
||
}
|
||
|
||
static void
|
||
v850_extract_return_value (struct type *type, char *regbuf, char *valbuf)
|
||
{
|
||
CORE_ADDR return_buffer;
|
||
|
||
if (!v850_use_struct_convention (0, type))
|
||
{
|
||
/* Scalar return values of <= 8 bytes are returned in
|
||
E_V0_REGNUM to E_V1_REGNUM. */
|
||
memcpy (valbuf,
|
||
®buf[REGISTER_BYTE (E_V0_REGNUM)],
|
||
TYPE_LENGTH (type));
|
||
}
|
||
else
|
||
{
|
||
/* Aggregates and return values > 8 bytes are returned in memory,
|
||
pointed to by R6. */
|
||
return_buffer =
|
||
extract_address (regbuf + REGISTER_BYTE (E_V0_REGNUM),
|
||
REGISTER_RAW_SIZE (E_V0_REGNUM));
|
||
|
||
read_memory (return_buffer, valbuf, TYPE_LENGTH (type));
|
||
}
|
||
}
|
||
|
||
const static unsigned char *
|
||
v850_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr)
|
||
{
|
||
static unsigned char breakpoint[] = { 0x85, 0x05 };
|
||
*lenptr = sizeof (breakpoint);
|
||
return breakpoint;
|
||
}
|
||
|
||
static CORE_ADDR
|
||
v850_extract_struct_value_address (char *regbuf)
|
||
{
|
||
return extract_address (regbuf + v850_register_byte (E_V0_REGNUM),
|
||
v850_register_raw_size (E_V0_REGNUM));
|
||
}
|
||
|
||
static void
|
||
v850_store_return_value (struct type *type, char *valbuf)
|
||
{
|
||
CORE_ADDR return_buffer;
|
||
|
||
if (!v850_use_struct_convention (0, type))
|
||
deprecated_write_register_bytes (REGISTER_BYTE (E_V0_REGNUM), valbuf,
|
||
TYPE_LENGTH (type));
|
||
else
|
||
{
|
||
return_buffer = read_register (E_V0_REGNUM);
|
||
write_memory (return_buffer, valbuf, TYPE_LENGTH (type));
|
||
}
|
||
}
|
||
|
||
static void
|
||
v850_frame_init_saved_regs (struct frame_info *fi)
|
||
{
|
||
struct prologue_info pi;
|
||
struct pifsr pifsrs[E_NUM_REGS + 1], *pifsr;
|
||
CORE_ADDR func_addr, func_end;
|
||
|
||
if (!get_frame_saved_regs (fi))
|
||
{
|
||
frame_saved_regs_zalloc (fi);
|
||
|
||
/* The call dummy doesn't save any registers on the stack, so we
|
||
can return now. */
|
||
if (DEPRECATED_PC_IN_CALL_DUMMY (get_frame_pc (fi), get_frame_base (fi),
|
||
get_frame_base (fi)))
|
||
return;
|
||
|
||
/* Find the beginning of this function, so we can analyze its
|
||
prologue. */
|
||
if (find_pc_partial_function (get_frame_pc (fi), NULL, &func_addr, &func_end))
|
||
{
|
||
pi.pifsrs = pifsrs;
|
||
|
||
v850_scan_prologue (get_frame_pc (fi), &pi);
|
||
|
||
if (!get_next_frame (fi) && pi.framereg == E_SP_REGNUM)
|
||
deprecated_update_frame_base_hack (fi, read_register (pi.framereg) - pi.frameoffset);
|
||
|
||
for (pifsr = pifsrs; pifsr->framereg; pifsr++)
|
||
{
|
||
get_frame_saved_regs (fi)[pifsr->reg] = pifsr->offset + get_frame_base (fi);
|
||
|
||
if (pifsr->framereg == E_SP_REGNUM)
|
||
get_frame_saved_regs (fi)[pifsr->reg] += pi.frameoffset;
|
||
}
|
||
}
|
||
/* Else we're out of luck (can't debug completely stripped code).
|
||
FIXME. */
|
||
}
|
||
}
|
||
|
||
/* Function: init_extra_frame_info
|
||
Setup the frame's frame pointer, pc, and frame addresses for saved
|
||
registers. Most of the work is done in scan_prologue().
|
||
|
||
Note that when we are called for the last frame (currently active frame),
|
||
that get_frame_pc (fi) and fi->frame will already be setup. However, fi->frame will
|
||
be valid only if this routine uses FP. For previous frames, fi-frame will
|
||
always be correct (since that is derived from v850_frame_chain ()).
|
||
|
||
We can be called with the PC in the call dummy under two circumstances.
|
||
First, during normal backtracing, second, while figuring out the frame
|
||
pointer just prior to calling the target function (see run_stack_dummy). */
|
||
|
||
static void
|
||
v850_init_extra_frame_info (int fromleaf, struct frame_info *fi)
|
||
{
|
||
struct prologue_info pi;
|
||
|
||
if (get_next_frame (fi))
|
||
deprecated_update_frame_pc_hack (fi, FRAME_SAVED_PC (get_next_frame (fi)));
|
||
|
||
v850_frame_init_saved_regs (fi);
|
||
}
|
||
|
||
static void
|
||
v850_store_struct_return (CORE_ADDR addr, CORE_ADDR sp)
|
||
{
|
||
write_register (E_ARG0_REGNUM, addr);
|
||
}
|
||
|
||
static CORE_ADDR
|
||
v850_target_read_fp (void)
|
||
{
|
||
return read_register (E_FP_RAW_REGNUM);
|
||
}
|
||
|
||
static struct gdbarch *
|
||
v850_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
|
||
{
|
||
static LONGEST call_dummy_words[1] = { 0 };
|
||
struct gdbarch_tdep *tdep = NULL;
|
||
struct gdbarch *gdbarch;
|
||
int i;
|
||
|
||
/* find a candidate among the list of pre-declared architectures. */
|
||
arches = gdbarch_list_lookup_by_info (arches, &info);
|
||
if (arches != NULL)
|
||
return (arches->gdbarch);
|
||
|
||
#if 0
|
||
tdep = (struct gdbarch_tdep *) xmalloc (sizeof (struct gdbarch_tdep));
|
||
#endif
|
||
|
||
/* Change the register names based on the current machine type. */
|
||
if (info.bfd_arch_info->arch != bfd_arch_v850)
|
||
return 0;
|
||
|
||
gdbarch = gdbarch_alloc (&info, 0);
|
||
|
||
/* NOTE: cagney/2002-12-06: This can be deleted when this arch is
|
||
ready to unwind the PC first (see frame.c:get_prev_frame()). */
|
||
set_gdbarch_deprecated_init_frame_pc (gdbarch, init_frame_pc_default);
|
||
|
||
for (i = 0; v850_processor_type_table[i].regnames != NULL; i++)
|
||
{
|
||
if (v850_processor_type_table[i].mach == info.bfd_arch_info->mach)
|
||
{
|
||
v850_register_names = v850_processor_type_table[i].regnames;
|
||
tm_print_insn_info.mach = info.bfd_arch_info->mach;
|
||
break;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Basic register fields and methods.
|
||
*/
|
||
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_fp_regnum (gdbarch, E_FP_REGNUM);
|
||
set_gdbarch_pc_regnum (gdbarch, E_PC_REGNUM);
|
||
set_gdbarch_register_name (gdbarch, v850_register_name);
|
||
set_gdbarch_register_size (gdbarch, v850_reg_size);
|
||
set_gdbarch_register_bytes (gdbarch, E_ALL_REGS_SIZE);
|
||
set_gdbarch_register_byte (gdbarch, v850_register_byte);
|
||
set_gdbarch_register_raw_size (gdbarch, v850_register_raw_size);
|
||
set_gdbarch_max_register_raw_size (gdbarch, v850_reg_size);
|
||
set_gdbarch_register_virtual_size (gdbarch, v850_register_raw_size);
|
||
set_gdbarch_max_register_virtual_size (gdbarch, v850_reg_size);
|
||
set_gdbarch_register_virtual_type (gdbarch, v850_reg_virtual_type);
|
||
|
||
set_gdbarch_read_fp (gdbarch, v850_target_read_fp);
|
||
|
||
/*
|
||
* Frame Info
|
||
*/
|
||
set_gdbarch_deprecated_frame_init_saved_regs (gdbarch, v850_frame_init_saved_regs);
|
||
set_gdbarch_deprecated_init_extra_frame_info (gdbarch, v850_init_extra_frame_info);
|
||
set_gdbarch_frame_chain (gdbarch, v850_frame_chain);
|
||
set_gdbarch_saved_pc_after_call (gdbarch, v850_saved_pc_after_call);
|
||
set_gdbarch_frame_saved_pc (gdbarch, v850_frame_saved_pc);
|
||
set_gdbarch_skip_prologue (gdbarch, v850_skip_prologue);
|
||
|
||
/*
|
||
* Miscelany
|
||
*/
|
||
/* Stack grows up. */
|
||
set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
|
||
/* PC stops zero byte after a trap instruction
|
||
(which means: exactly on trap instruction). */
|
||
set_gdbarch_decr_pc_after_break (gdbarch, 0);
|
||
/* This value is almost never non-zero... */
|
||
set_gdbarch_function_start_offset (gdbarch, 0);
|
||
/* This value is almost never non-zero... */
|
||
set_gdbarch_frame_args_skip (gdbarch, 0);
|
||
/* OK to default this value to 'unknown'. */
|
||
set_gdbarch_frame_num_args (gdbarch, frame_num_args_unknown);
|
||
|
||
/*
|
||
* Call Dummies
|
||
*
|
||
* These values and methods are used when gdb calls a target function. */
|
||
set_gdbarch_push_return_address (gdbarch, v850_push_return_address);
|
||
set_gdbarch_deprecated_extract_return_value (gdbarch, v850_extract_return_value);
|
||
set_gdbarch_push_arguments (gdbarch, v850_push_arguments);
|
||
set_gdbarch_pop_frame (gdbarch, v850_pop_frame);
|
||
set_gdbarch_store_struct_return (gdbarch, v850_store_struct_return);
|
||
set_gdbarch_deprecated_store_return_value (gdbarch, v850_store_return_value);
|
||
set_gdbarch_deprecated_extract_struct_value_address (gdbarch, v850_extract_struct_value_address);
|
||
set_gdbarch_use_struct_convention (gdbarch, v850_use_struct_convention);
|
||
set_gdbarch_call_dummy_address (gdbarch, entry_point_address);
|
||
set_gdbarch_call_dummy_start_offset (gdbarch, 0);
|
||
set_gdbarch_call_dummy_breakpoint_offset (gdbarch, 0);
|
||
set_gdbarch_call_dummy_breakpoint_offset_p (gdbarch, 1);
|
||
set_gdbarch_call_dummy_length (gdbarch, 0);
|
||
set_gdbarch_call_dummy_p (gdbarch, 1);
|
||
set_gdbarch_call_dummy_words (gdbarch, call_dummy_nil);
|
||
set_gdbarch_sizeof_call_dummy_words (gdbarch, 0);
|
||
set_gdbarch_call_dummy_stack_adjust_p (gdbarch, 0);
|
||
/* set_gdbarch_call_dummy_stack_adjust */
|
||
set_gdbarch_fix_call_dummy (gdbarch, v850_fix_call_dummy);
|
||
set_gdbarch_breakpoint_from_pc (gdbarch, v850_breakpoint_from_pc);
|
||
|
||
set_gdbarch_int_bit (gdbarch, 4 * TARGET_CHAR_BIT);
|
||
set_gdbarch_ptr_bit (gdbarch, 4 * TARGET_CHAR_BIT);
|
||
set_gdbarch_addr_bit (gdbarch, 4 * TARGET_CHAR_BIT);
|
||
set_gdbarch_long_double_bit (gdbarch, 8 * TARGET_CHAR_BIT);
|
||
|
||
set_gdbarch_extra_stack_alignment_needed (gdbarch, 0);
|
||
|
||
return gdbarch;
|
||
}
|
||
|
||
void
|
||
_initialize_v850_tdep (void)
|
||
{
|
||
tm_print_insn = print_insn_v850;
|
||
register_gdbarch_init (bfd_arch_v850, v850_gdbarch_init);
|
||
}
|