mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-15 04:31:49 +08:00
04180708ef
Both of them are used in conversion. We can remove them since the conversion is done. There are many architectures only have one breakpoint instruction, so their gdbarch methods breakpoint_kind_from_pc and sw_breakpoint_from_kind look very similar. Instead of macro, we use template "template <size_t, const gdb_byte *> struct bp_manipulation" for these architectures. In order to use template, I also change breakpoint instruction of type "static const gdb_byte[]" to "constexpr gdb_byte[]", and rename them to ARCH_break_insn. gdb: 2016-11-03 Yao Qi <yao.qi@linaro.org> Pedro Alves <palves@redhat.com> * aarch64-tdep.c (aarch64_default_breakpoint): Change it to constexpr. Don't use GDBARCH_BREAKPOINT_MANIPULATION. (aarch64_gdbarch_init): Don't use SET_GDBARCH_BREAKPOINT_MANIPULATION. * alpha-tdep.c (break_insn): Rename to alpha_break_insn. Don't use GDBARCH_BREAKPOINT_MANIPULATION. (alpha_gdbarch_init): Don't use SET_GDBARCH_BREAKPOINT_MANIPULATION. * arc-tdep.c (arc_gdbarch_init): Don't use SET_GDBARCH_BREAKPOINT_MANIPULATION. * arch-utils.h (GDBARCH_BREAKPOINT_MANIPULATION): Remove. (struct bp_manipulation): New. (SET_GDBARCH_BREAKPOINT_MANIPULATION): Remove. (struct bp_manipulation_endian): New. (BP_MANIPULATION): New. (BP_MANIPULATION_ENDIAN): New. * arm-tdep.c (arm_gdbarch_init): Don't use SET_GDBARCH_BREAKPOINT_MANIPULATION. * avr-tdep.c (avr_break_insn): Change it constexpr. (avr_gdbarch_init): Don't use SET_GDBARCH_BREAKPOINT_MANIPULATION. * bfin-tdep.c (bfin_gdbarch_init): Likewise. * cris-tdep.c (cris_gdbarch_init): Likewise. * frv-tdep.c (breakpoint): Rename it to frv_break_insn, and change its type to constexpr. Don't use GDBARCH_BREAKPOINT_MANIPULATION. (frv_gdbarch_init): Don't use SET_GDBARCH_BREAKPOINT_MANIPULATION. * ft32-tdep.c (breakpoint): Rename it to ft32_break_insn and change its type to constexpr. Don't use GDBARCH_BREAKPOINT_MANIPULATION. (ft32_gdbarch_init): Don't use SET_GDBARCH_BREAKPOINT_MANIPULATION. * h8300-tdep.c (breakpoint): Rename it to h8300_break_insn. Don't use GDBARCH_BREAKPOINT_MANIPULATION. (h8300_gdbarch_init): Don't use SET_GDBARCH_BREAKPOINT_MANIPULATION. * hppa-tdep.c (breakpoint): Rename it to h8300_break_insn. Don't use GDBARCH_BREAKPOINT_MANIPULATION. (hppa_gdbarch_init): Don't use SET_GDBARCH_BREAKPOINT_MANIPULATION. * i386-tdep.c (break_insn): Rename it to i386_break_insn. Don't use GDBARCH_BREAKPOINT_MANIPULATION. (i386_gdbarch_init): Don't use SET_GDBARCH_BREAKPOINT_MANIPULATION. * iq2000-tdep.c (iq2000_gdbarch_init): Don't use SET_GDBARCH_BREAKPOINT_MANIPULATION. * lm32-tdep.c (breakpoint): Rename it to lm32_break_insn and change its type to constexpr. Don't use GDBARCH_BREAKPOINT_MANIPULATION. (lm32_gdbarch_init): Don't use SET_GDBARCH_BREAKPOINT_MANIPULATION. * m32c-tdep.c (break_insn): Rename it to m32c_break_insn and change its type to constexpr. Don't use GDBARCH_BREAKPOINT_MANIPULATION. (m32c_gdbarch_init): Don't use SET_GDBARCH_BREAKPOINT_MANIPULATION. * m32r-tdep.c (m32r_gdbarch_init): Likewise. * m68hc11-tdep.c (breakpoint): Rename it to m68hc11_break_insn and change its type to constexpr. Don't use GDBARCH_BREAKPOINT_MANIPULATION. (m68hc11_gdbarch_init): Don't use SET_GDBARCH_BREAKPOINT_MANIPULATION. * m68k-tdep.c (break_insn): Rename it to m68k_break_insn and change its type to constexpr. Don't use GDBARCH_BREAKPOINT_MANIPULATION. (m68k_gdbarch_init): Don't use SET_GDBARCH_BREAKPOINT_MANIPULATION. * m88k-tdep.c (break_insn): Rename it to m88k_break_insn and change its type to constexpr. Don't use GDBARCH_BREAKPOINT_MANIPULATION. (m88k_gdbarch_init): Don't use SET_GDBARCH_BREAKPOINT_MANIPULATION. * mep-tdep.c (breakpoint): Rename it to mep_break_insn and change its type to constexpr. Don't use GDBARCH_BREAKPOINT_MANIPULATION. (mep_gdbarch_init): Don't use SET_GDBARCH_BREAKPOINT_MANIPULATION. * microblaze-tdep.c (break_insn): Rename it to microblaze_break_insn and change its type to constexpr. Don't use GDBARCH_BREAKPOINT_MANIPULATION. (microblaze_gdbarch_init): Don't use SET_GDBARCH_BREAKPOINT_MANIPULATION. * mips-tdep.c (mips_gdbarch_init): Likewise. * mn10300-tdep.c (breakpoint): Rename it to mn10300_break_insn and change its type to constexpr. Don't use GDBARCH_BREAKPOINT_MANIPULATION. (mn10300_gdbarch_init): Don't use SET_GDBARCH_BREAKPOINT_MANIPULATION. * moxie-tdep.c (breakpoint): Rename it to moxie_break_insn and change its type to constexpr. Don't use GDBARCH_BREAKPOINT_MANIPULATION. (moxie_gdbarch_init): Don't use SET_GDBARCH_BREAKPOINT_MANIPULATION. * msp430-tdep.c (breakpoint): Rename it to msp430_break_insn and change its type to constexpr. Don't use GDBARCH_BREAKPOINT_MANIPULATION. (msp430_gdbarch_init): Don't use SET_GDBARCH_BREAKPOINT_MANIPULATION. * mt-tdep.c (mt_gdbarch_init): Likewise. * nds32-tdep.c (break_insn): Rename it to nds32_break_insn and change its type to constexpr. Don't use GDBARCH_BREAKPOINT_MANIPULATION. (nds32_gdbarch_init): Don't use SET_GDBARCH_BREAKPOINT_MANIPULATION. * nios2-tdep.c (nios2_gdbarch_init): Likewise. * rl78-tdep.c (breakpoint): Rename it to rl78_break_ins and change its type to rl78_break_insn. Don't use GDBARCH_BREAKPOINT_MANIPULATION. (rl78_gdbarch_init): Don't use SET_GDBARCH_BREAKPOINT_MANIPULATION. * rs6000-tdep.c (big_breakpoint): Change its type to constexpr. (little_breakpoint): Likewise. Don't use GDBARCH_BREAKPOINT_MANIPULATION_ENDIAN. (rs6000_gdbarch_init): Don't use SET_GDBARCH_BREAKPOINT_MANIPULATION. * rx-tdep.c (breakpoint): Rename it to rx_break_insn and change its type to constexpr. Don't use GDBARCH_BREAKPOINT_MANIPULATION. (rx_gdbarch_init): Don't use SET_GDBARCH_BREAKPOINT_MANIPULATION. * s390-linux-tdep.c (breakpoint): Rename it to s390_break_insn and change its type to constexpr. Don't use GDBARCH_BREAKPOINT_MANIPULATION (s390_gdbarch_init): Don't use SET_GDBARCH_BREAKPOINT_MANIPULATION. * score-tdep.c (score_gdbarch_init): Likewise. * sh-tdep.c (sh_gdbarch_init): Likewise. * sh64-tdep.c (sh64_gdbarch_init): Likewise. * sparc-tdep.c (break_insn): Rename it to sparc_break_insn and change its type to constexpr. Don't use GDBARCH_BREAKPOINT_MANIPULATION. (sparc32_gdbarch_init): Don't use SET_GDBARCH_BREAKPOINT_MANIPULATION. * spu-tdep.c (breakpoint): Rename it to spu_break_insn and change its type to constexpr. Don't use GDBARCH_BREAKPOINT_MANIPULATION. (spu_gdbarch_init): Don't use SET_GDBARCH_BREAKPOINT_MANIPULATION. * tic6x-tdep.c (tic6x_gdbarch_init): Likewise. * tilegx-tdep.c (breakpoint): Rename it to tilegx_break_insn and change its type to constexpr. Don't use GDBARCH_BREAKPOINT_MANIPULATION. (tilegx_gdbarch_init): Don't use SET_GDBARCH_BREAKPOINT_MANIPULATION. * v850-tdep.c (v850_gdbarch_init): Likewise. * vax-tdep.c (break_insn): Rename it to vax_break_insn and change its type to constexpr. Don't use GDBARCH_BREAKPOINT_MANIPULATION. (vax_gdbarch_init): Don't use SET_GDBARCH_BREAKPOINT_MANIPULATION. * xstormy16-tdep.c (breakpoint): Rename it to xstormy16_break_insn and change its type to constexpr. Don't use GDBARCH_BREAKPOINT_MANIPULATION. (xstormy16_gdbarch_init): Don't use SET_GDBARCH_BREAKPOINT_MANIPULATION. * xtensa-tdep.c (xtensa_gdbarch_init): Likewise.
1551 lines
45 KiB
C
1551 lines
45 KiB
C
/* Target-dependent code for the S+core architecture, for GDB,
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the GNU Debugger.
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Copyright (C) 2006-2016 Free Software Foundation, Inc.
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Contributed by Qinwei (qinwei@sunnorth.com.cn)
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Contributed by Ching-Peng Lin (cplin@sunplus.com)
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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 "inferior.h"
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#include "symtab.h"
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#include "objfiles.h"
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#include "gdbcore.h"
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#include "target.h"
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#include "arch-utils.h"
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#include "regcache.h"
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#include "regset.h"
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#include "dis-asm.h"
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#include "frame-unwind.h"
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#include "frame-base.h"
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#include "trad-frame.h"
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#include "dwarf2-frame.h"
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#include "score-tdep.h"
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#define G_FLD(_i,_ms,_ls) \
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((unsigned)((_i) << (31 - (_ms))) >> (31 - (_ms) + (_ls)))
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typedef struct{
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unsigned long long v;
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unsigned long long raw;
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unsigned int len;
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}inst_t;
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struct score_frame_cache
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{
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CORE_ADDR base;
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CORE_ADDR fp;
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struct trad_frame_saved_reg *saved_regs;
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};
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static int target_mach = bfd_mach_score7;
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static struct type *
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score_register_type (struct gdbarch *gdbarch, int regnum)
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{
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gdb_assert (regnum >= 0
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&& regnum < ((target_mach == bfd_mach_score7)
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? SCORE7_NUM_REGS : SCORE3_NUM_REGS));
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return builtin_type (gdbarch)->builtin_uint32;
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}
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static CORE_ADDR
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score_unwind_sp (struct gdbarch *gdbarch, struct frame_info *next_frame)
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{
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return frame_unwind_register_unsigned (next_frame, SCORE_SP_REGNUM);
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}
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static CORE_ADDR
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score_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
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{
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return frame_unwind_register_unsigned (next_frame, SCORE_PC_REGNUM);
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}
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static const char *
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score7_register_name (struct gdbarch *gdbarch, int regnum)
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{
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const char *score_register_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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"PSR", "COND", "ECR", "EXCPVEC", "CCR",
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"EPC", "EMA", "TLBLOCK", "TLBPT", "PEADDR",
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"TLBRPT", "PEVN", "PECTX", "LIMPFN", "LDMPFN",
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"PREV", "DREG", "PC", "DSAVE", "COUNTER",
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"LDCR", "STCR", "CEH", "CEL",
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};
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gdb_assert (regnum >= 0 && regnum < SCORE7_NUM_REGS);
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return score_register_names[regnum];
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}
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static const char *
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score3_register_name (struct gdbarch *gdbarch, int regnum)
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{
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const char *score_register_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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"PSR", "COND", "ECR", "EXCPVEC", "CCR",
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"EPC", "EMA", "PREV", "DREG", "DSAVE",
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"COUNTER", "LDCR", "STCR", "CEH", "CEL",
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"", "", "PC",
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};
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gdb_assert (regnum >= 0 && regnum < SCORE3_NUM_REGS);
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return score_register_names[regnum];
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}
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#if WITH_SIM
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static int
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score_register_sim_regno (struct gdbarch *gdbarch, int regnum)
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{
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gdb_assert (regnum >= 0
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&& regnum < ((target_mach == bfd_mach_score7)
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? SCORE7_NUM_REGS : SCORE3_NUM_REGS));
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return regnum;
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}
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#endif
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static int
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score_print_insn (bfd_vma memaddr, struct disassemble_info *info)
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{
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if (info->endian == BFD_ENDIAN_BIG)
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return print_insn_big_score (memaddr, info);
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else
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return print_insn_little_score (memaddr, info);
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}
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static inst_t *
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score7_fetch_inst (struct gdbarch *gdbarch, CORE_ADDR addr, gdb_byte *memblock)
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{
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enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
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static inst_t inst = { 0, 0, 0 };
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gdb_byte buf[SCORE_INSTLEN] = { 0 };
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int big;
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int ret;
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if (target_has_execution && memblock != NULL)
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{
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/* Fetch instruction from local MEMBLOCK. */
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memcpy (buf, memblock, SCORE_INSTLEN);
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}
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else
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{
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/* Fetch instruction from target. */
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ret = target_read_memory (addr & ~0x3, buf, SCORE_INSTLEN);
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if (ret)
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{
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error (_("Error: target_read_memory in file:%s, line:%d!"),
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__FILE__, __LINE__);
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return 0;
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}
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}
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inst.raw = extract_unsigned_integer (buf, SCORE_INSTLEN, byte_order);
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inst.len = (inst.raw & 0x80008000) ? 4 : 2;
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inst.v = ((inst.raw >> 16 & 0x7FFF) << 15) | (inst.raw & 0x7FFF);
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big = (byte_order == BFD_ENDIAN_BIG);
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if (inst.len == 2)
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{
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if (big ^ ((addr & 0x2) == 2))
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inst.v = G_FLD (inst.v, 29, 15);
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else
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inst.v = G_FLD (inst.v, 14, 0);
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}
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return &inst;
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}
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static inst_t *
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score3_adjust_pc_and_fetch_inst (CORE_ADDR *pcptr, int *lenptr,
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enum bfd_endian byte_order)
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{
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static inst_t inst = { 0, 0, 0 };
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struct breakplace
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{
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int break_offset;
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int inst_len;
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};
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/* raw table 1 (column 2, 3, 4)
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* 0 1 0 * # 2
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* 0 1 1 0 # 3
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0 1 1 0 * # 6
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table 2 (column 1, 2, 3)
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* 0 0 * * # 0, 4
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0 1 0 * * # 2
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1 1 0 * * # 6
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*/
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static const struct breakplace bk_table[16] =
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{
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/* table 1 */
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{0, 0},
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{0, 0},
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{0, 4},
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{0, 6},
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{0, 0},
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{0, 0},
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{-2, 6},
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{0, 0},
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/* table 2 */
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{0, 2},
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{0, 0},
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{-2, 4},
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{0, 0},
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{0, 2},
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{0, 0},
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{-4, 6},
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{0, 0}
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};
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#define EXTRACT_LEN 2
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CORE_ADDR adjust_pc = *pcptr & ~0x1;
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gdb_byte buf[5][EXTRACT_LEN] =
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{
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{'\0', '\0'},
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{'\0', '\0'},
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{'\0', '\0'},
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{'\0', '\0'},
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{'\0', '\0'}
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};
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int ret;
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unsigned int raw;
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unsigned int cbits = 0;
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int bk_index;
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int i, count;
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inst.v = 0;
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inst.raw = 0;
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inst.len = 0;
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adjust_pc -= 4;
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for (i = 0; i < 5; i++)
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{
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ret = target_read_memory (adjust_pc + 2 * i, buf[i], EXTRACT_LEN);
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if (ret != 0)
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{
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buf[i][0] = '\0';
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buf[i][1] = '\0';
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if (i == 2)
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error (_("Error: target_read_memory in file:%s, line:%d!"),
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__FILE__, __LINE__);
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}
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raw = extract_unsigned_integer (buf[i], EXTRACT_LEN, byte_order);
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cbits = (cbits << 1) | (raw >> 15);
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}
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adjust_pc += 4;
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if (cbits & 0x4)
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{
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/* table 1 */
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cbits = (cbits >> 1) & 0x7;
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bk_index = cbits;
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}
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else
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{
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/* table 2 */
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cbits = (cbits >> 2) & 0x7;
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bk_index = cbits + 8;
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}
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gdb_assert (!((bk_table[bk_index].break_offset == 0)
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&& (bk_table[bk_index].inst_len == 0)));
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inst.len = bk_table[bk_index].inst_len;
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i = (bk_table[bk_index].break_offset + 4) / 2;
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count = inst.len / 2;
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for (; count > 0; i++, count--)
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{
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inst.raw = (inst.raw << 16)
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| extract_unsigned_integer (buf[i], EXTRACT_LEN, byte_order);
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}
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switch (inst.len)
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{
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case 2:
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inst.v = inst.raw & 0x7FFF;
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break;
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case 4:
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inst.v = ((inst.raw >> 16 & 0x7FFF) << 15) | (inst.raw & 0x7FFF);
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break;
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case 6:
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inst.v = ((inst.raw >> 32 & 0x7FFF) << 30)
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| ((inst.raw >> 16 & 0x7FFF) << 15) | (inst.raw & 0x7FFF);
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break;
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}
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if (pcptr)
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*pcptr = adjust_pc + bk_table[bk_index].break_offset;
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if (lenptr)
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*lenptr = bk_table[bk_index].inst_len;
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#undef EXTRACT_LEN
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return &inst;
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}
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/* Implement the breakpoint_kind_from_pc gdbarch method. */
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static int
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score7_breakpoint_kind_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr)
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{
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int ret;
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unsigned int raw;
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enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
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gdb_byte buf[SCORE_INSTLEN] = { 0 };
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if ((ret = target_read_memory (*pcptr & ~0x3, buf, SCORE_INSTLEN)) != 0)
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{
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error (_("Error: target_read_memory in file:%s, line:%d!"),
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__FILE__, __LINE__);
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}
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raw = extract_unsigned_integer (buf, SCORE_INSTLEN, byte_order);
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if (!(raw & 0x80008000))
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{
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/* 16bits instruction. */
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*pcptr &= ~0x1;
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return 2;
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}
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else
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{
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/* 32bits instruction. */
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*pcptr &= ~0x3;
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return 4;
|
|
}
|
|
}
|
|
|
|
/* Implement the sw_breakpoint_from_kind gdbarch method. */
|
|
|
|
static const gdb_byte *
|
|
score7_sw_breakpoint_from_kind (struct gdbarch *gdbarch, int kind, int *size)
|
|
{
|
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
|
|
|
*size = kind;
|
|
|
|
if (kind == 4)
|
|
{
|
|
static gdb_byte big_breakpoint32[] = { 0x80, 0x00, 0x80, 0x06 };
|
|
static gdb_byte little_breakpoint32[] = { 0x06, 0x80, 0x00, 0x80 };
|
|
|
|
if (byte_order == BFD_ENDIAN_BIG)
|
|
return big_breakpoint32;
|
|
else
|
|
return little_breakpoint32;
|
|
}
|
|
else
|
|
{
|
|
static gdb_byte big_breakpoint16[] = { 0x60, 0x02 };
|
|
static gdb_byte little_breakpoint16[] = { 0x02, 0x60 };
|
|
|
|
if (byte_order == BFD_ENDIAN_BIG)
|
|
return big_breakpoint16;
|
|
else
|
|
return little_breakpoint16;
|
|
}
|
|
}
|
|
|
|
/* Implement the breakpoint_kind_from_pc gdbarch method. */
|
|
|
|
static int
|
|
score3_breakpoint_kind_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr)
|
|
{
|
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
|
int len;
|
|
|
|
score3_adjust_pc_and_fetch_inst (pcptr, &len, byte_order);
|
|
|
|
return len;
|
|
}
|
|
|
|
/* Implement the sw_breakpoint_from_kind gdbarch method. */
|
|
|
|
static const gdb_byte *
|
|
score3_sw_breakpoint_from_kind (struct gdbarch *gdbarch, int kind, int *size)
|
|
{
|
|
int index = 0;
|
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
|
static gdb_byte score_break_insns[6][6] = {
|
|
/* The following three instructions are big endian. */
|
|
{ 0x00, 0x20 },
|
|
{ 0x80, 0x00, 0x00, 0x06 },
|
|
{ 0x80, 0x00, 0x80, 0x00, 0x00, 0x00 },
|
|
/* The following three instructions are little endian. */
|
|
{ 0x20, 0x00 },
|
|
{ 0x00, 0x80, 0x06, 0x00 },
|
|
{ 0x00, 0x80, 0x00, 0x80, 0x00, 0x00 }};
|
|
|
|
*size = kind;
|
|
|
|
index = ((byte_order == BFD_ENDIAN_BIG) ? 0 : 3) + (kind / 2 - 1);
|
|
return score_break_insns[index];
|
|
}
|
|
|
|
static CORE_ADDR
|
|
score_adjust_breakpoint_address (struct gdbarch *gdbarch, CORE_ADDR bpaddr)
|
|
{
|
|
CORE_ADDR adjust_pc = bpaddr;
|
|
|
|
if (target_mach == bfd_mach_score3)
|
|
score3_adjust_pc_and_fetch_inst (&adjust_pc, NULL,
|
|
gdbarch_byte_order (gdbarch));
|
|
else
|
|
adjust_pc = align_down (adjust_pc, 2);
|
|
|
|
return adjust_pc;
|
|
}
|
|
|
|
static CORE_ADDR
|
|
score_frame_align (struct gdbarch *gdbarch, CORE_ADDR addr)
|
|
{
|
|
return align_down (addr, 16);
|
|
}
|
|
|
|
static void
|
|
score_xfer_register (struct regcache *regcache, int regnum, int length,
|
|
enum bfd_endian endian, gdb_byte *readbuf,
|
|
const gdb_byte *writebuf, int buf_offset)
|
|
{
|
|
int reg_offset = 0;
|
|
gdb_assert (regnum >= 0
|
|
&& regnum < ((target_mach == bfd_mach_score7)
|
|
? SCORE7_NUM_REGS : SCORE3_NUM_REGS));
|
|
|
|
switch (endian)
|
|
{
|
|
case BFD_ENDIAN_BIG:
|
|
reg_offset = SCORE_REGSIZE - length;
|
|
break;
|
|
case BFD_ENDIAN_LITTLE:
|
|
reg_offset = 0;
|
|
break;
|
|
case BFD_ENDIAN_UNKNOWN:
|
|
reg_offset = 0;
|
|
break;
|
|
default:
|
|
error (_("Error: score_xfer_register in file:%s, line:%d!"),
|
|
__FILE__, __LINE__);
|
|
}
|
|
|
|
if (readbuf != NULL)
|
|
regcache_cooked_read_part (regcache, regnum, reg_offset, length,
|
|
readbuf + buf_offset);
|
|
if (writebuf != NULL)
|
|
regcache_cooked_write_part (regcache, regnum, reg_offset, length,
|
|
writebuf + buf_offset);
|
|
}
|
|
|
|
static enum return_value_convention
|
|
score_return_value (struct gdbarch *gdbarch, struct value *function,
|
|
struct type *type, struct regcache *regcache,
|
|
gdb_byte * readbuf, const gdb_byte * writebuf)
|
|
{
|
|
if (TYPE_CODE (type) == TYPE_CODE_STRUCT
|
|
|| TYPE_CODE (type) == TYPE_CODE_UNION
|
|
|| TYPE_CODE (type) == TYPE_CODE_ARRAY)
|
|
return RETURN_VALUE_STRUCT_CONVENTION;
|
|
else
|
|
{
|
|
int offset;
|
|
int regnum;
|
|
for (offset = 0, regnum = SCORE_A0_REGNUM;
|
|
offset < TYPE_LENGTH (type);
|
|
offset += SCORE_REGSIZE, regnum++)
|
|
{
|
|
int xfer = SCORE_REGSIZE;
|
|
|
|
if (offset + xfer > TYPE_LENGTH (type))
|
|
xfer = TYPE_LENGTH (type) - offset;
|
|
score_xfer_register (regcache, regnum, xfer,
|
|
gdbarch_byte_order(gdbarch),
|
|
readbuf, writebuf, offset);
|
|
}
|
|
return RETURN_VALUE_REGISTER_CONVENTION;
|
|
}
|
|
}
|
|
|
|
static struct frame_id
|
|
score_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame)
|
|
{
|
|
return frame_id_build (get_frame_register_unsigned (this_frame,
|
|
SCORE_SP_REGNUM),
|
|
get_frame_pc (this_frame));
|
|
}
|
|
|
|
static int
|
|
score_type_needs_double_align (struct type *type)
|
|
{
|
|
enum type_code typecode = TYPE_CODE (type);
|
|
|
|
if ((typecode == TYPE_CODE_INT && TYPE_LENGTH (type) == 8)
|
|
|| (typecode == TYPE_CODE_FLT && TYPE_LENGTH (type) == 8))
|
|
return 1;
|
|
else if (typecode == TYPE_CODE_STRUCT || typecode == TYPE_CODE_UNION)
|
|
{
|
|
int i, n;
|
|
|
|
n = TYPE_NFIELDS (type);
|
|
for (i = 0; i < n; i++)
|
|
if (score_type_needs_double_align (TYPE_FIELD_TYPE (type, i)))
|
|
return 1;
|
|
return 0;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static CORE_ADDR
|
|
score_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
|
|
struct regcache *regcache, CORE_ADDR bp_addr,
|
|
int nargs, struct value **args, CORE_ADDR sp,
|
|
int struct_return, CORE_ADDR struct_addr)
|
|
{
|
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
|
int argnum;
|
|
int argreg;
|
|
int arglen = 0;
|
|
CORE_ADDR stack_offset = 0;
|
|
CORE_ADDR addr = 0;
|
|
|
|
/* Step 1, Save RA. */
|
|
regcache_cooked_write_unsigned (regcache, SCORE_RA_REGNUM, bp_addr);
|
|
|
|
/* Step 2, Make space on the stack for the args. */
|
|
struct_addr = align_down (struct_addr, 16);
|
|
sp = align_down (sp, 16);
|
|
for (argnum = 0; argnum < nargs; argnum++)
|
|
arglen += align_up (TYPE_LENGTH (value_type (args[argnum])),
|
|
SCORE_REGSIZE);
|
|
sp -= align_up (arglen, 16);
|
|
|
|
argreg = SCORE_BEGIN_ARG_REGNUM;
|
|
|
|
/* Step 3, Check if struct return then save the struct address to
|
|
r4 and increase the stack_offset by 4. */
|
|
if (struct_return)
|
|
{
|
|
regcache_cooked_write_unsigned (regcache, argreg++, struct_addr);
|
|
stack_offset += SCORE_REGSIZE;
|
|
}
|
|
|
|
/* Step 4, Load arguments:
|
|
If arg length is too long (> 4 bytes), then split the arg and
|
|
save every parts. */
|
|
for (argnum = 0; argnum < nargs; argnum++)
|
|
{
|
|
struct value *arg = args[argnum];
|
|
struct type *arg_type = check_typedef (value_type (arg));
|
|
enum type_code typecode = TYPE_CODE (arg_type);
|
|
const gdb_byte *val = value_contents (arg);
|
|
int downward_offset = 0;
|
|
int arg_last_part_p = 0;
|
|
|
|
arglen = TYPE_LENGTH (arg_type);
|
|
|
|
/* If a arg should be aligned to 8 bytes (long long or double),
|
|
the value should be put to even register numbers. */
|
|
if (score_type_needs_double_align (arg_type))
|
|
{
|
|
if (argreg & 1)
|
|
argreg++;
|
|
}
|
|
|
|
/* If sizeof a block < SCORE_REGSIZE, then Score GCC will chose
|
|
the default "downward"/"upward" method:
|
|
|
|
Example:
|
|
|
|
struct struc
|
|
{
|
|
char a; char b; char c;
|
|
} s = {'a', 'b', 'c'};
|
|
|
|
Big endian: s = {X, 'a', 'b', 'c'}
|
|
Little endian: s = {'a', 'b', 'c', X}
|
|
|
|
Where X is a hole. */
|
|
|
|
if (gdbarch_byte_order(gdbarch) == BFD_ENDIAN_BIG
|
|
&& (typecode == TYPE_CODE_STRUCT
|
|
|| typecode == TYPE_CODE_UNION)
|
|
&& argreg > SCORE_LAST_ARG_REGNUM
|
|
&& arglen < SCORE_REGSIZE)
|
|
downward_offset += (SCORE_REGSIZE - arglen);
|
|
|
|
while (arglen > 0)
|
|
{
|
|
int partial_len = arglen < SCORE_REGSIZE ? arglen : SCORE_REGSIZE;
|
|
ULONGEST regval = extract_unsigned_integer (val, partial_len,
|
|
byte_order);
|
|
|
|
/* The last part of a arg should shift left when
|
|
gdbarch_byte_order is BFD_ENDIAN_BIG. */
|
|
if (byte_order == BFD_ENDIAN_BIG
|
|
&& arg_last_part_p == 1
|
|
&& (typecode == TYPE_CODE_STRUCT
|
|
|| typecode == TYPE_CODE_UNION))
|
|
regval <<= ((SCORE_REGSIZE - partial_len) * TARGET_CHAR_BIT);
|
|
|
|
/* Always increase the stack_offset and save args to stack. */
|
|
addr = sp + stack_offset + downward_offset;
|
|
write_memory (addr, val, partial_len);
|
|
|
|
if (argreg <= SCORE_LAST_ARG_REGNUM)
|
|
{
|
|
regcache_cooked_write_unsigned (regcache, argreg++, regval);
|
|
if (arglen > SCORE_REGSIZE && arglen < SCORE_REGSIZE * 2)
|
|
arg_last_part_p = 1;
|
|
}
|
|
|
|
val += partial_len;
|
|
arglen -= partial_len;
|
|
stack_offset += align_up (partial_len, SCORE_REGSIZE);
|
|
}
|
|
}
|
|
|
|
/* Step 5, Save SP. */
|
|
regcache_cooked_write_unsigned (regcache, SCORE_SP_REGNUM, sp);
|
|
|
|
return sp;
|
|
}
|
|
|
|
static CORE_ADDR
|
|
score7_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
|
|
{
|
|
CORE_ADDR cpc = pc;
|
|
int iscan = 32, stack_sub = 0;
|
|
while (iscan-- > 0)
|
|
{
|
|
inst_t *inst = score7_fetch_inst (gdbarch, cpc, NULL);
|
|
if (!inst)
|
|
break;
|
|
if ((inst->len == 4) && !stack_sub
|
|
&& (G_FLD (inst->v, 29, 25) == 0x1
|
|
&& G_FLD (inst->v, 24, 20) == 0x0))
|
|
{
|
|
/* addi r0, offset */
|
|
stack_sub = cpc + SCORE_INSTLEN;
|
|
pc = cpc + SCORE_INSTLEN;
|
|
}
|
|
else if ((inst->len == 4)
|
|
&& (G_FLD (inst->v, 29, 25) == 0x0)
|
|
&& (G_FLD (inst->v, 24, 20) == 0x2)
|
|
&& (G_FLD (inst->v, 19, 15) == 0x0)
|
|
&& (G_FLD (inst->v, 14, 10) == 0xF)
|
|
&& (G_FLD (inst->v, 9, 0) == 0x56))
|
|
{
|
|
/* mv r2, r0 */
|
|
pc = cpc + SCORE_INSTLEN;
|
|
break;
|
|
}
|
|
else if ((inst->len == 2)
|
|
&& (G_FLD (inst->v, 14, 12) == 0x0)
|
|
&& (G_FLD (inst->v, 11, 8) == 0x2)
|
|
&& (G_FLD (inst->v, 7, 4) == 0x0)
|
|
&& (G_FLD (inst->v, 3, 0) == 0x3))
|
|
{
|
|
/* mv! r2, r0 */
|
|
pc = cpc + SCORE16_INSTLEN;
|
|
break;
|
|
}
|
|
else if ((inst->len == 2)
|
|
&& ((G_FLD (inst->v, 14, 12) == 3) /* j15 form */
|
|
|| (G_FLD (inst->v, 14, 12) == 4) /* b15 form */
|
|
|| (G_FLD (inst->v, 14, 12) == 0x0
|
|
&& G_FLD (inst->v, 3, 0) == 0x4))) /* br! */
|
|
break;
|
|
else if ((inst->len == 4)
|
|
&& ((G_FLD (inst->v, 29, 25) == 2) /* j32 form */
|
|
|| (G_FLD (inst->v, 29, 25) == 4) /* b32 form */
|
|
|| (G_FLD (inst->v, 29, 25) == 0x0
|
|
&& G_FLD (inst->v, 6, 1) == 0x4))) /* br */
|
|
break;
|
|
|
|
cpc += (inst->len == 2) ? SCORE16_INSTLEN : SCORE_INSTLEN;
|
|
}
|
|
return pc;
|
|
}
|
|
|
|
static CORE_ADDR
|
|
score3_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
|
|
{
|
|
CORE_ADDR cpc = pc;
|
|
int iscan = 32, stack_sub = 0;
|
|
while (iscan-- > 0)
|
|
{
|
|
inst_t *inst
|
|
= score3_adjust_pc_and_fetch_inst (&cpc, NULL,
|
|
gdbarch_byte_order (gdbarch));
|
|
|
|
if (!inst)
|
|
break;
|
|
if (inst->len == 4 && !stack_sub
|
|
&& (G_FLD (inst->v, 29, 25) == 0x1)
|
|
&& (G_FLD (inst->v, 19, 17) == 0x0)
|
|
&& (G_FLD (inst->v, 24, 20) == 0x0))
|
|
{
|
|
/* addi r0, offset */
|
|
stack_sub = cpc + inst->len;
|
|
pc = cpc + inst->len;
|
|
}
|
|
else if (inst->len == 4
|
|
&& (G_FLD (inst->v, 29, 25) == 0x0)
|
|
&& (G_FLD (inst->v, 24, 20) == 0x2)
|
|
&& (G_FLD (inst->v, 19, 15) == 0x0)
|
|
&& (G_FLD (inst->v, 14, 10) == 0xF)
|
|
&& (G_FLD (inst->v, 9, 0) == 0x56))
|
|
{
|
|
/* mv r2, r0 */
|
|
pc = cpc + inst->len;
|
|
break;
|
|
}
|
|
else if ((inst->len == 2)
|
|
&& (G_FLD (inst->v, 14, 10) == 0x10)
|
|
&& (G_FLD (inst->v, 9, 5) == 0x2)
|
|
&& (G_FLD (inst->v, 4, 0) == 0x0))
|
|
{
|
|
/* mv! r2, r0 */
|
|
pc = cpc + inst->len;
|
|
break;
|
|
}
|
|
else if (inst->len == 2
|
|
&& ((G_FLD (inst->v, 14, 12) == 3) /* b15 form */
|
|
|| (G_FLD (inst->v, 14, 12) == 0x0
|
|
&& G_FLD (inst->v, 11, 5) == 0x4))) /* br! */
|
|
break;
|
|
else if (inst->len == 4
|
|
&& ((G_FLD (inst->v, 29, 25) == 2) /* j32 form */
|
|
|| (G_FLD (inst->v, 29, 25) == 4))) /* b32 form */
|
|
break;
|
|
|
|
cpc += inst->len;
|
|
}
|
|
return pc;
|
|
}
|
|
|
|
/* Implement the stack_frame_destroyed_p gdbarch method. */
|
|
|
|
static int
|
|
score7_stack_frame_destroyed_p (struct gdbarch *gdbarch, CORE_ADDR cur_pc)
|
|
{
|
|
inst_t *inst = score7_fetch_inst (gdbarch, cur_pc, NULL);
|
|
|
|
if (inst->v == 0x23)
|
|
return 1; /* mv! r0, r2 */
|
|
else if (G_FLD (inst->v, 14, 12) == 0x2
|
|
&& G_FLD (inst->v, 3, 0) == 0xa)
|
|
return 1; /* pop! */
|
|
else if (G_FLD (inst->v, 14, 12) == 0x0
|
|
&& G_FLD (inst->v, 7, 0) == 0x34)
|
|
return 1; /* br! r3 */
|
|
else if (G_FLD (inst->v, 29, 15) == 0x2
|
|
&& G_FLD (inst->v, 6, 1) == 0x2b)
|
|
return 1; /* mv r0, r2 */
|
|
else if (G_FLD (inst->v, 29, 25) == 0x0
|
|
&& G_FLD (inst->v, 6, 1) == 0x4
|
|
&& G_FLD (inst->v, 19, 15) == 0x3)
|
|
return 1; /* br r3 */
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
/* Implement the stack_frame_destroyed_p gdbarch method. */
|
|
|
|
static int
|
|
score3_stack_frame_destroyed_p (struct gdbarch *gdbarch, CORE_ADDR cur_pc)
|
|
{
|
|
CORE_ADDR pc = cur_pc;
|
|
inst_t *inst
|
|
= score3_adjust_pc_and_fetch_inst (&pc, NULL,
|
|
gdbarch_byte_order (gdbarch));
|
|
|
|
if (inst->len == 2
|
|
&& (G_FLD (inst->v, 14, 10) == 0x10)
|
|
&& (G_FLD (inst->v, 9, 5) == 0x0)
|
|
&& (G_FLD (inst->v, 4, 0) == 0x2))
|
|
return 1; /* mv! r0, r2 */
|
|
else if (inst->len == 4
|
|
&& (G_FLD (inst->v, 29, 25) == 0x0)
|
|
&& (G_FLD (inst->v, 24, 20) == 0x2)
|
|
&& (G_FLD (inst->v, 19, 15) == 0x0)
|
|
&& (G_FLD (inst->v, 14, 10) == 0xF)
|
|
&& (G_FLD (inst->v, 9, 0) == 0x56))
|
|
return 1; /* mv r0, r2 */
|
|
else if (inst->len == 2
|
|
&& (G_FLD (inst->v, 14, 12) == 0x0)
|
|
&& (G_FLD (inst->v, 11, 5) == 0x2))
|
|
return 1; /* pop! */
|
|
else if (inst->len == 2
|
|
&& (G_FLD (inst->v, 14, 12) == 0x0)
|
|
&& (G_FLD (inst->v, 11, 7) == 0x0)
|
|
&& (G_FLD (inst->v, 6, 5) == 0x2))
|
|
return 1; /* rpop! */
|
|
else if (inst->len == 2
|
|
&& (G_FLD (inst->v, 14, 12) == 0x0)
|
|
&& (G_FLD (inst->v, 11, 5) == 0x4)
|
|
&& (G_FLD (inst->v, 4, 0) == 0x3))
|
|
return 1; /* br! r3 */
|
|
else if (inst->len == 4
|
|
&& (G_FLD (inst->v, 29, 25) == 0x0)
|
|
&& (G_FLD (inst->v, 24, 20) == 0x0)
|
|
&& (G_FLD (inst->v, 19, 15) == 0x3)
|
|
&& (G_FLD (inst->v, 14, 10) == 0xF)
|
|
&& (G_FLD (inst->v, 9, 0) == 0x8))
|
|
return 1; /* br r3 */
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
static gdb_byte *
|
|
score7_malloc_and_get_memblock (CORE_ADDR addr, CORE_ADDR size)
|
|
{
|
|
int ret;
|
|
gdb_byte *memblock = NULL;
|
|
|
|
if (size == 0)
|
|
return NULL;
|
|
|
|
memblock = (gdb_byte *) xmalloc (size);
|
|
memset (memblock, 0, size);
|
|
ret = target_read_memory (addr & ~0x3, memblock, size);
|
|
if (ret)
|
|
{
|
|
error (_("Error: target_read_memory in file:%s, line:%d!"),
|
|
__FILE__, __LINE__);
|
|
return NULL;
|
|
}
|
|
return memblock;
|
|
}
|
|
|
|
static void
|
|
score7_free_memblock (gdb_byte *memblock)
|
|
{
|
|
xfree (memblock);
|
|
}
|
|
|
|
static void
|
|
score7_adjust_memblock_ptr (gdb_byte **memblock, CORE_ADDR prev_pc,
|
|
CORE_ADDR cur_pc)
|
|
{
|
|
if (prev_pc == -1)
|
|
{
|
|
/* First time call this function, do nothing. */
|
|
}
|
|
else if (cur_pc - prev_pc == 2 && (cur_pc & 0x3) == 0)
|
|
{
|
|
/* First 16-bit instruction, then 32-bit instruction. */
|
|
*memblock += SCORE_INSTLEN;
|
|
}
|
|
else if (cur_pc - prev_pc == 4)
|
|
{
|
|
/* Is 32-bit instruction, increase MEMBLOCK by 4. */
|
|
*memblock += SCORE_INSTLEN;
|
|
}
|
|
}
|
|
|
|
static void
|
|
score7_analyze_prologue (CORE_ADDR startaddr, CORE_ADDR pc,
|
|
struct frame_info *this_frame,
|
|
struct score_frame_cache *this_cache)
|
|
{
|
|
struct gdbarch *gdbarch = get_frame_arch (this_frame);
|
|
CORE_ADDR sp;
|
|
CORE_ADDR fp;
|
|
CORE_ADDR cur_pc = startaddr;
|
|
|
|
int sp_offset = 0;
|
|
int ra_offset = 0;
|
|
int fp_offset = 0;
|
|
int ra_offset_p = 0;
|
|
int fp_offset_p = 0;
|
|
int inst_len = 0;
|
|
|
|
gdb_byte *memblock = NULL;
|
|
gdb_byte *memblock_ptr = NULL;
|
|
CORE_ADDR prev_pc = -1;
|
|
|
|
/* Allocate MEMBLOCK if PC - STARTADDR > 0. */
|
|
memblock_ptr = memblock =
|
|
score7_malloc_and_get_memblock (startaddr, pc - startaddr);
|
|
|
|
sp = get_frame_register_unsigned (this_frame, SCORE_SP_REGNUM);
|
|
fp = get_frame_register_unsigned (this_frame, SCORE_FP_REGNUM);
|
|
|
|
for (; cur_pc < pc; prev_pc = cur_pc, cur_pc += inst_len)
|
|
{
|
|
inst_t *inst = NULL;
|
|
if (memblock != NULL)
|
|
{
|
|
/* Reading memory block from target succefully and got all
|
|
the instructions(from STARTADDR to PC) needed. */
|
|
score7_adjust_memblock_ptr (&memblock, prev_pc, cur_pc);
|
|
inst = score7_fetch_inst (gdbarch, cur_pc, memblock);
|
|
}
|
|
else
|
|
{
|
|
/* Otherwise, we fetch 4 bytes from target, and GDB also
|
|
work correctly. */
|
|
inst = score7_fetch_inst (gdbarch, cur_pc, NULL);
|
|
}
|
|
|
|
/* FIXME: make a full-power prologue analyzer. */
|
|
if (inst->len == 2)
|
|
{
|
|
inst_len = SCORE16_INSTLEN;
|
|
|
|
if (G_FLD (inst->v, 14, 12) == 0x2
|
|
&& G_FLD (inst->v, 3, 0) == 0xe)
|
|
{
|
|
/* push! */
|
|
sp_offset += 4;
|
|
|
|
if (G_FLD (inst->v, 11, 7) == 0x6
|
|
&& ra_offset_p == 0)
|
|
{
|
|
/* push! r3, [r0] */
|
|
ra_offset = sp_offset;
|
|
ra_offset_p = 1;
|
|
}
|
|
else if (G_FLD (inst->v, 11, 7) == 0x4
|
|
&& fp_offset_p == 0)
|
|
{
|
|
/* push! r2, [r0] */
|
|
fp_offset = sp_offset;
|
|
fp_offset_p = 1;
|
|
}
|
|
}
|
|
else if (G_FLD (inst->v, 14, 12) == 0x2
|
|
&& G_FLD (inst->v, 3, 0) == 0xa)
|
|
{
|
|
/* pop! */
|
|
sp_offset -= 4;
|
|
}
|
|
else if (G_FLD (inst->v, 14, 7) == 0xc1
|
|
&& G_FLD (inst->v, 2, 0) == 0x0)
|
|
{
|
|
/* subei! r0, n */
|
|
sp_offset += (int) pow (2, G_FLD (inst->v, 6, 3));
|
|
}
|
|
else if (G_FLD (inst->v, 14, 7) == 0xc0
|
|
&& G_FLD (inst->v, 2, 0) == 0x0)
|
|
{
|
|
/* addei! r0, n */
|
|
sp_offset -= (int) pow (2, G_FLD (inst->v, 6, 3));
|
|
}
|
|
}
|
|
else
|
|
{
|
|
inst_len = SCORE_INSTLEN;
|
|
|
|
if (G_FLD(inst->v, 29, 25) == 0x3
|
|
&& G_FLD(inst->v, 2, 0) == 0x4
|
|
&& G_FLD(inst->v, 19, 15) == 0)
|
|
{
|
|
/* sw rD, [r0, offset]+ */
|
|
sp_offset += SCORE_INSTLEN;
|
|
|
|
if (G_FLD(inst->v, 24, 20) == 0x3)
|
|
{
|
|
/* rD = r3 */
|
|
if (ra_offset_p == 0)
|
|
{
|
|
ra_offset = sp_offset;
|
|
ra_offset_p = 1;
|
|
}
|
|
}
|
|
else if (G_FLD(inst->v, 24, 20) == 0x2)
|
|
{
|
|
/* rD = r2 */
|
|
if (fp_offset_p == 0)
|
|
{
|
|
fp_offset = sp_offset;
|
|
fp_offset_p = 1;
|
|
}
|
|
}
|
|
}
|
|
else if (G_FLD(inst->v, 29, 25) == 0x14
|
|
&& G_FLD(inst->v, 19,15) == 0)
|
|
{
|
|
/* sw rD, [r0, offset] */
|
|
if (G_FLD(inst->v, 24, 20) == 0x3)
|
|
{
|
|
/* rD = r3 */
|
|
ra_offset = sp_offset - G_FLD(inst->v, 14, 0);
|
|
ra_offset_p = 1;
|
|
}
|
|
else if (G_FLD(inst->v, 24, 20) == 0x2)
|
|
{
|
|
/* rD = r2 */
|
|
fp_offset = sp_offset - G_FLD(inst->v, 14, 0);
|
|
fp_offset_p = 1;
|
|
}
|
|
}
|
|
else if (G_FLD (inst->v, 29, 15) == 0x1c60
|
|
&& G_FLD (inst->v, 2, 0) == 0x0)
|
|
{
|
|
/* lw r3, [r0]+, 4 */
|
|
sp_offset -= SCORE_INSTLEN;
|
|
ra_offset_p = 1;
|
|
}
|
|
else if (G_FLD (inst->v, 29, 15) == 0x1c40
|
|
&& G_FLD (inst->v, 2, 0) == 0x0)
|
|
{
|
|
/* lw r2, [r0]+, 4 */
|
|
sp_offset -= SCORE_INSTLEN;
|
|
fp_offset_p = 1;
|
|
}
|
|
|
|
else if (G_FLD (inst->v, 29, 17) == 0x100
|
|
&& G_FLD (inst->v, 0, 0) == 0x0)
|
|
{
|
|
/* addi r0, -offset */
|
|
sp_offset += 65536 - G_FLD (inst->v, 16, 1);
|
|
}
|
|
else if (G_FLD (inst->v, 29, 17) == 0x110
|
|
&& G_FLD (inst->v, 0, 0) == 0x0)
|
|
{
|
|
/* addi r2, offset */
|
|
if (pc - cur_pc > 4)
|
|
{
|
|
unsigned int save_v = inst->v;
|
|
inst_t *inst2 =
|
|
score7_fetch_inst (gdbarch, cur_pc + SCORE_INSTLEN, NULL);
|
|
if (inst2->v == 0x23)
|
|
{
|
|
/* mv! r0, r2 */
|
|
sp_offset -= G_FLD (save_v, 16, 1);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Save RA. */
|
|
if (ra_offset_p == 1)
|
|
{
|
|
if (this_cache->saved_regs[SCORE_PC_REGNUM].addr == -1)
|
|
this_cache->saved_regs[SCORE_PC_REGNUM].addr =
|
|
sp + sp_offset - ra_offset;
|
|
}
|
|
else
|
|
{
|
|
this_cache->saved_regs[SCORE_PC_REGNUM] =
|
|
this_cache->saved_regs[SCORE_RA_REGNUM];
|
|
}
|
|
|
|
/* Save FP. */
|
|
if (fp_offset_p == 1)
|
|
{
|
|
if (this_cache->saved_regs[SCORE_FP_REGNUM].addr == -1)
|
|
this_cache->saved_regs[SCORE_FP_REGNUM].addr =
|
|
sp + sp_offset - fp_offset;
|
|
}
|
|
|
|
/* Save SP and FP. */
|
|
this_cache->base = sp + sp_offset;
|
|
this_cache->fp = fp;
|
|
|
|
/* Don't forget to free MEMBLOCK if we allocated it. */
|
|
if (memblock_ptr != NULL)
|
|
score7_free_memblock (memblock_ptr);
|
|
}
|
|
|
|
static void
|
|
score3_analyze_prologue (CORE_ADDR startaddr, CORE_ADDR pc,
|
|
struct frame_info *this_frame,
|
|
struct score_frame_cache *this_cache)
|
|
{
|
|
CORE_ADDR sp;
|
|
CORE_ADDR fp;
|
|
CORE_ADDR cur_pc = startaddr;
|
|
enum bfd_endian byte_order
|
|
= gdbarch_byte_order (get_frame_arch (this_frame));
|
|
|
|
int sp_offset = 0;
|
|
int ra_offset = 0;
|
|
int fp_offset = 0;
|
|
int ra_offset_p = 0;
|
|
int fp_offset_p = 0;
|
|
int inst_len = 0;
|
|
|
|
sp = get_frame_register_unsigned (this_frame, SCORE_SP_REGNUM);
|
|
fp = get_frame_register_unsigned (this_frame, SCORE_FP_REGNUM);
|
|
|
|
for (; cur_pc < pc; cur_pc += inst_len)
|
|
{
|
|
inst_t *inst = NULL;
|
|
|
|
inst = score3_adjust_pc_and_fetch_inst (&cur_pc, &inst_len, byte_order);
|
|
|
|
/* FIXME: make a full-power prologue analyzer. */
|
|
if (inst->len == 2)
|
|
{
|
|
if (G_FLD (inst->v, 14, 12) == 0x0
|
|
&& G_FLD (inst->v, 11, 7) == 0x0
|
|
&& G_FLD (inst->v, 6, 5) == 0x3)
|
|
{
|
|
/* push! */
|
|
sp_offset += 4;
|
|
|
|
if (G_FLD (inst->v, 4, 0) == 0x3
|
|
&& ra_offset_p == 0)
|
|
{
|
|
/* push! r3, [r0] */
|
|
ra_offset = sp_offset;
|
|
ra_offset_p = 1;
|
|
}
|
|
else if (G_FLD (inst->v, 4, 0) == 0x2
|
|
&& fp_offset_p == 0)
|
|
{
|
|
/* push! r2, [r0] */
|
|
fp_offset = sp_offset;
|
|
fp_offset_p = 1;
|
|
}
|
|
}
|
|
else if (G_FLD (inst->v, 14, 12) == 0x6
|
|
&& G_FLD (inst->v, 11, 10) == 0x3)
|
|
{
|
|
/* rpush! */
|
|
int start_r = G_FLD (inst->v, 9, 5);
|
|
int cnt = G_FLD (inst->v, 4, 0);
|
|
|
|
if ((ra_offset_p == 0)
|
|
&& (start_r <= SCORE_RA_REGNUM)
|
|
&& (SCORE_RA_REGNUM < start_r + cnt))
|
|
{
|
|
/* rpush! contains r3 */
|
|
ra_offset_p = 1;
|
|
ra_offset = sp_offset + 4 * (SCORE_RA_REGNUM - start_r) + 4;
|
|
}
|
|
|
|
if ((fp_offset_p == 0)
|
|
&& (start_r <= SCORE_FP_REGNUM)
|
|
&& (SCORE_FP_REGNUM < start_r + cnt))
|
|
{
|
|
/* rpush! contains r2 */
|
|
fp_offset_p = 1;
|
|
fp_offset = sp_offset + 4 * (SCORE_FP_REGNUM - start_r) + 4;
|
|
}
|
|
|
|
sp_offset += 4 * cnt;
|
|
}
|
|
else if (G_FLD (inst->v, 14, 12) == 0x0
|
|
&& G_FLD (inst->v, 11, 7) == 0x0
|
|
&& G_FLD (inst->v, 6, 5) == 0x2)
|
|
{
|
|
/* pop! */
|
|
sp_offset -= 4;
|
|
}
|
|
else if (G_FLD (inst->v, 14, 12) == 0x6
|
|
&& G_FLD (inst->v, 11, 10) == 0x2)
|
|
{
|
|
/* rpop! */
|
|
sp_offset -= 4 * G_FLD (inst->v, 4, 0);
|
|
}
|
|
else if (G_FLD (inst->v, 14, 12) == 0x5
|
|
&& G_FLD (inst->v, 11, 10) == 0x3
|
|
&& G_FLD (inst->v, 9, 6) == 0x0)
|
|
{
|
|
/* addi! r0, -offset */
|
|
int imm = G_FLD (inst->v, 5, 0);
|
|
if (imm >> 5)
|
|
imm = -(0x3F - imm + 1);
|
|
sp_offset -= imm;
|
|
}
|
|
else if (G_FLD (inst->v, 14, 12) == 0x5
|
|
&& G_FLD (inst->v, 11, 10) == 0x3
|
|
&& G_FLD (inst->v, 9, 6) == 0x2)
|
|
{
|
|
/* addi! r2, offset */
|
|
if (pc - cur_pc >= 2)
|
|
{
|
|
inst_t *inst2;
|
|
|
|
cur_pc += inst->len;
|
|
inst2 = score3_adjust_pc_and_fetch_inst (&cur_pc, NULL,
|
|
byte_order);
|
|
|
|
if (inst2->len == 2
|
|
&& G_FLD (inst2->v, 14, 10) == 0x10
|
|
&& G_FLD (inst2->v, 9, 5) == 0x0
|
|
&& G_FLD (inst2->v, 4, 0) == 0x2)
|
|
{
|
|
/* mv! r0, r2 */
|
|
int imm = G_FLD (inst->v, 5, 0);
|
|
if (imm >> 5)
|
|
imm = -(0x3F - imm + 1);
|
|
sp_offset -= imm;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else if (inst->len == 4)
|
|
{
|
|
if (G_FLD (inst->v, 29, 25) == 0x3
|
|
&& G_FLD (inst->v, 2, 0) == 0x4
|
|
&& G_FLD (inst->v, 24, 20) == 0x3
|
|
&& G_FLD (inst->v, 19, 15) == 0x0)
|
|
{
|
|
/* sw r3, [r0, offset]+ */
|
|
sp_offset += inst->len;
|
|
if (ra_offset_p == 0)
|
|
{
|
|
ra_offset = sp_offset;
|
|
ra_offset_p = 1;
|
|
}
|
|
}
|
|
else if (G_FLD (inst->v, 29, 25) == 0x3
|
|
&& G_FLD (inst->v, 2, 0) == 0x4
|
|
&& G_FLD (inst->v, 24, 20) == 0x2
|
|
&& G_FLD (inst->v, 19, 15) == 0x0)
|
|
{
|
|
/* sw r2, [r0, offset]+ */
|
|
sp_offset += inst->len;
|
|
if (fp_offset_p == 0)
|
|
{
|
|
fp_offset = sp_offset;
|
|
fp_offset_p = 1;
|
|
}
|
|
}
|
|
else if (G_FLD (inst->v, 29, 25) == 0x7
|
|
&& G_FLD (inst->v, 2, 0) == 0x0
|
|
&& G_FLD (inst->v, 24, 20) == 0x3
|
|
&& G_FLD (inst->v, 19, 15) == 0x0)
|
|
{
|
|
/* lw r3, [r0]+, 4 */
|
|
sp_offset -= inst->len;
|
|
ra_offset_p = 1;
|
|
}
|
|
else if (G_FLD (inst->v, 29, 25) == 0x7
|
|
&& G_FLD (inst->v, 2, 0) == 0x0
|
|
&& G_FLD (inst->v, 24, 20) == 0x2
|
|
&& G_FLD (inst->v, 19, 15) == 0x0)
|
|
{
|
|
/* lw r2, [r0]+, 4 */
|
|
sp_offset -= inst->len;
|
|
fp_offset_p = 1;
|
|
}
|
|
else if (G_FLD (inst->v, 29, 25) == 0x1
|
|
&& G_FLD (inst->v, 19, 17) == 0x0
|
|
&& G_FLD (inst->v, 24, 20) == 0x0
|
|
&& G_FLD (inst->v, 0, 0) == 0x0)
|
|
{
|
|
/* addi r0, -offset */
|
|
int imm = G_FLD (inst->v, 16, 1);
|
|
if (imm >> 15)
|
|
imm = -(0xFFFF - imm + 1);
|
|
sp_offset -= imm;
|
|
}
|
|
else if (G_FLD (inst->v, 29, 25) == 0x1
|
|
&& G_FLD (inst->v, 19, 17) == 0x0
|
|
&& G_FLD (inst->v, 24, 20) == 0x2
|
|
&& G_FLD (inst->v, 0, 0) == 0x0)
|
|
{
|
|
/* addi r2, offset */
|
|
if (pc - cur_pc >= 2)
|
|
{
|
|
inst_t *inst2;
|
|
|
|
cur_pc += inst->len;
|
|
inst2 = score3_adjust_pc_and_fetch_inst (&cur_pc, NULL,
|
|
byte_order);
|
|
|
|
if (inst2->len == 2
|
|
&& G_FLD (inst2->v, 14, 10) == 0x10
|
|
&& G_FLD (inst2->v, 9, 5) == 0x0
|
|
&& G_FLD (inst2->v, 4, 0) == 0x2)
|
|
{
|
|
/* mv! r0, r2 */
|
|
int imm = G_FLD (inst->v, 16, 1);
|
|
if (imm >> 15)
|
|
imm = -(0xFFFF - imm + 1);
|
|
sp_offset -= imm;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Save RA. */
|
|
if (ra_offset_p == 1)
|
|
{
|
|
if (this_cache->saved_regs[SCORE_PC_REGNUM].addr == -1)
|
|
this_cache->saved_regs[SCORE_PC_REGNUM].addr =
|
|
sp + sp_offset - ra_offset;
|
|
}
|
|
else
|
|
{
|
|
this_cache->saved_regs[SCORE_PC_REGNUM] =
|
|
this_cache->saved_regs[SCORE_RA_REGNUM];
|
|
}
|
|
|
|
/* Save FP. */
|
|
if (fp_offset_p == 1)
|
|
{
|
|
if (this_cache->saved_regs[SCORE_FP_REGNUM].addr == -1)
|
|
this_cache->saved_regs[SCORE_FP_REGNUM].addr =
|
|
sp + sp_offset - fp_offset;
|
|
}
|
|
|
|
/* Save SP and FP. */
|
|
this_cache->base = sp + sp_offset;
|
|
this_cache->fp = fp;
|
|
}
|
|
|
|
static struct score_frame_cache *
|
|
score_make_prologue_cache (struct frame_info *this_frame, void **this_cache)
|
|
{
|
|
struct score_frame_cache *cache;
|
|
|
|
if ((*this_cache) != NULL)
|
|
return (struct score_frame_cache *) (*this_cache);
|
|
|
|
cache = FRAME_OBSTACK_ZALLOC (struct score_frame_cache);
|
|
(*this_cache) = cache;
|
|
cache->saved_regs = trad_frame_alloc_saved_regs (this_frame);
|
|
|
|
/* Analyze the prologue. */
|
|
{
|
|
const CORE_ADDR pc = get_frame_pc (this_frame);
|
|
CORE_ADDR start_addr;
|
|
|
|
find_pc_partial_function (pc, NULL, &start_addr, NULL);
|
|
if (start_addr == 0)
|
|
return cache;
|
|
|
|
if (target_mach == bfd_mach_score3)
|
|
score3_analyze_prologue (start_addr, pc, this_frame,
|
|
(struct score_frame_cache *) *this_cache);
|
|
else
|
|
score7_analyze_prologue (start_addr, pc, this_frame,
|
|
(struct score_frame_cache *) *this_cache);
|
|
}
|
|
|
|
/* Save SP. */
|
|
trad_frame_set_value (cache->saved_regs, SCORE_SP_REGNUM, cache->base);
|
|
|
|
return (struct score_frame_cache *) (*this_cache);
|
|
}
|
|
|
|
static void
|
|
score_prologue_this_id (struct frame_info *this_frame, void **this_cache,
|
|
struct frame_id *this_id)
|
|
{
|
|
struct score_frame_cache *info = score_make_prologue_cache (this_frame,
|
|
this_cache);
|
|
(*this_id) = frame_id_build (info->base, get_frame_func (this_frame));
|
|
}
|
|
|
|
static struct value *
|
|
score_prologue_prev_register (struct frame_info *this_frame,
|
|
void **this_cache, int regnum)
|
|
{
|
|
struct score_frame_cache *info = score_make_prologue_cache (this_frame,
|
|
this_cache);
|
|
return trad_frame_get_prev_register (this_frame, info->saved_regs, regnum);
|
|
}
|
|
|
|
static const struct frame_unwind score_prologue_unwind =
|
|
{
|
|
NORMAL_FRAME,
|
|
default_frame_unwind_stop_reason,
|
|
score_prologue_this_id,
|
|
score_prologue_prev_register,
|
|
NULL,
|
|
default_frame_sniffer,
|
|
NULL
|
|
};
|
|
|
|
static CORE_ADDR
|
|
score_prologue_frame_base_address (struct frame_info *this_frame,
|
|
void **this_cache)
|
|
{
|
|
struct score_frame_cache *info =
|
|
score_make_prologue_cache (this_frame, this_cache);
|
|
return info->fp;
|
|
}
|
|
|
|
static const struct frame_base score_prologue_frame_base =
|
|
{
|
|
&score_prologue_unwind,
|
|
score_prologue_frame_base_address,
|
|
score_prologue_frame_base_address,
|
|
score_prologue_frame_base_address,
|
|
};
|
|
|
|
static const struct frame_base *
|
|
score_prologue_frame_base_sniffer (struct frame_info *this_frame)
|
|
{
|
|
return &score_prologue_frame_base;
|
|
}
|
|
|
|
/* Core file support. */
|
|
|
|
static const struct regcache_map_entry score7_linux_gregmap[] =
|
|
{
|
|
/* FIXME: According to the current Linux kernel, r0 is preceded by
|
|
9 rather than 7 words. */
|
|
{ 7, REGCACHE_MAP_SKIP, 4 },
|
|
{ 32, 0, 4 }, /* r0 ... r31 */
|
|
{ 1, 55, 4 }, /* CEL */
|
|
{ 1, 54, 4 }, /* CEH */
|
|
{ 1, 53, 4 }, /* sr0, i.e. cnt or COUNTER */
|
|
{ 1, 52, 4 }, /* sr1, i.e. lcr or LDCR */
|
|
{ 1, 51, 4 }, /* sr2, i.e. scr or STCR */
|
|
{ 1, 49, 4 }, /* PC (same slot as EPC) */
|
|
{ 1, 38, 4 }, /* EMA */
|
|
{ 1, 32, 4 }, /* PSR */
|
|
{ 1, 34, 4 }, /* ECR */
|
|
{ 1, 33, 4 }, /* COND */
|
|
{ 0 }
|
|
};
|
|
|
|
#define SCORE7_LINUX_EPC_OFFSET (44 * 4)
|
|
#define SCORE7_LINUX_SIZEOF_GREGSET (49 * 4)
|
|
|
|
static void
|
|
score7_linux_supply_gregset(const struct regset *regset,
|
|
struct regcache *regcache,
|
|
int regnum, const void *buf,
|
|
size_t size)
|
|
{
|
|
regcache_supply_regset (regset, regcache, regnum, buf, size);
|
|
|
|
/* Supply the EPC from the same slot as the PC. Note that the
|
|
collect function will store the PC in that slot. */
|
|
if ((regnum == -1 || regnum == SCORE_EPC_REGNUM)
|
|
&& size >= SCORE7_LINUX_EPC_OFFSET + 4)
|
|
regcache_raw_supply (regcache, SCORE_EPC_REGNUM,
|
|
(const gdb_byte *) buf
|
|
+ SCORE7_LINUX_EPC_OFFSET);
|
|
}
|
|
|
|
static const struct regset score7_linux_gregset =
|
|
{
|
|
score7_linux_gregmap,
|
|
score7_linux_supply_gregset,
|
|
regcache_collect_regset
|
|
};
|
|
|
|
/* Iterate over core file register note sections. */
|
|
|
|
static void
|
|
score7_linux_iterate_over_regset_sections (struct gdbarch *gdbarch,
|
|
iterate_over_regset_sections_cb *cb,
|
|
void *cb_data,
|
|
const struct regcache *regcache)
|
|
{
|
|
cb (".reg", SCORE7_LINUX_SIZEOF_GREGSET, &score7_linux_gregset,
|
|
NULL, cb_data);
|
|
}
|
|
|
|
static struct gdbarch *
|
|
score_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
|
|
{
|
|
struct gdbarch *gdbarch;
|
|
target_mach = info.bfd_arch_info->mach;
|
|
|
|
arches = gdbarch_list_lookup_by_info (arches, &info);
|
|
if (arches != NULL)
|
|
{
|
|
return (arches->gdbarch);
|
|
}
|
|
gdbarch = gdbarch_alloc (&info, NULL);
|
|
|
|
set_gdbarch_short_bit (gdbarch, 16);
|
|
set_gdbarch_int_bit (gdbarch, 32);
|
|
set_gdbarch_float_bit (gdbarch, 32);
|
|
set_gdbarch_double_bit (gdbarch, 64);
|
|
set_gdbarch_long_double_bit (gdbarch, 64);
|
|
#if WITH_SIM
|
|
set_gdbarch_register_sim_regno (gdbarch, score_register_sim_regno);
|
|
#endif
|
|
set_gdbarch_pc_regnum (gdbarch, SCORE_PC_REGNUM);
|
|
set_gdbarch_sp_regnum (gdbarch, SCORE_SP_REGNUM);
|
|
set_gdbarch_adjust_breakpoint_address (gdbarch,
|
|
score_adjust_breakpoint_address);
|
|
set_gdbarch_register_type (gdbarch, score_register_type);
|
|
set_gdbarch_frame_align (gdbarch, score_frame_align);
|
|
set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
|
|
set_gdbarch_unwind_sp (gdbarch, score_unwind_sp);
|
|
set_gdbarch_unwind_pc (gdbarch, score_unwind_pc);
|
|
set_gdbarch_print_insn (gdbarch, score_print_insn);
|
|
|
|
switch (target_mach)
|
|
{
|
|
case bfd_mach_score7:
|
|
set_gdbarch_breakpoint_kind_from_pc (gdbarch,
|
|
score7_breakpoint_kind_from_pc);
|
|
set_gdbarch_sw_breakpoint_from_kind (gdbarch,
|
|
score7_sw_breakpoint_from_kind);
|
|
set_gdbarch_skip_prologue (gdbarch, score7_skip_prologue);
|
|
set_gdbarch_stack_frame_destroyed_p (gdbarch,
|
|
score7_stack_frame_destroyed_p);
|
|
set_gdbarch_register_name (gdbarch, score7_register_name);
|
|
set_gdbarch_num_regs (gdbarch, SCORE7_NUM_REGS);
|
|
/* Core file support. */
|
|
set_gdbarch_iterate_over_regset_sections
|
|
(gdbarch, score7_linux_iterate_over_regset_sections);
|
|
break;
|
|
|
|
case bfd_mach_score3:
|
|
set_gdbarch_breakpoint_kind_from_pc (gdbarch,
|
|
score3_breakpoint_kind_from_pc);
|
|
set_gdbarch_sw_breakpoint_from_kind (gdbarch,
|
|
score3_sw_breakpoint_from_kind);
|
|
set_gdbarch_skip_prologue (gdbarch, score3_skip_prologue);
|
|
set_gdbarch_stack_frame_destroyed_p (gdbarch,
|
|
score3_stack_frame_destroyed_p);
|
|
set_gdbarch_register_name (gdbarch, score3_register_name);
|
|
set_gdbarch_num_regs (gdbarch, SCORE3_NUM_REGS);
|
|
break;
|
|
}
|
|
|
|
/* Watchpoint hooks. */
|
|
set_gdbarch_have_nonsteppable_watchpoint (gdbarch, 1);
|
|
|
|
/* Dummy frame hooks. */
|
|
set_gdbarch_return_value (gdbarch, score_return_value);
|
|
set_gdbarch_call_dummy_location (gdbarch, AT_ENTRY_POINT);
|
|
set_gdbarch_dummy_id (gdbarch, score_dummy_id);
|
|
set_gdbarch_push_dummy_call (gdbarch, score_push_dummy_call);
|
|
|
|
/* Normal frame hooks. */
|
|
dwarf2_append_unwinders (gdbarch);
|
|
frame_base_append_sniffer (gdbarch, dwarf2_frame_base_sniffer);
|
|
frame_unwind_append_unwinder (gdbarch, &score_prologue_unwind);
|
|
frame_base_append_sniffer (gdbarch, score_prologue_frame_base_sniffer);
|
|
|
|
return gdbarch;
|
|
}
|
|
|
|
extern initialize_file_ftype _initialize_score_tdep;
|
|
|
|
void
|
|
_initialize_score_tdep (void)
|
|
{
|
|
gdbarch_register (bfd_arch_score, score_gdbarch_init, NULL);
|
|
}
|