5f814c3b3f
* score-tdep.h: Ditto. * NEWS: Ditto. * configure.tgt: Test do we have a simulator. * MAINTAINERS: Add myself under target score
1595 lines
47 KiB
C
1595 lines
47 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, 2007, 2008, 2009 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 "gdb_assert.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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#if WITH_SIM
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int
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score_target_can_use_watch (int type, int cnt, int othertype)
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{
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if (strcmp (current_target.to_shortname, "sim") == 0)
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return soc_gh_can_use_watch (type, cnt);
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return (*current_target.to_can_use_hw_breakpoint) (type, cnt, othertype);
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}
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int
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score_stopped_by_watch (void)
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{
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if (strcmp (current_target.to_shortname, "sim") == 0)
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return soc_gh_stopped_by_watch ();
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return (*current_target.to_stopped_by_watchpoint) ();
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}
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int
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score_target_insert_watchpoint (CORE_ADDR addr, int len, int type)
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{
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if (strcmp (current_target.to_shortname, "sim") == 0)
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return soc_gh_add_watch (addr, len, type);
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return (*current_target.to_insert_watchpoint) (addr, len, type);
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}
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int
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score_target_remove_watchpoint (CORE_ADDR addr, int len, int type)
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{
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if (strcmp (current_target.to_shortname, "sim") == 0)
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return soc_gh_del_watch (addr, len, type);
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return (*current_target.to_remove_watchpoint) (addr, len, type);
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}
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int
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score_target_insert_hw_breakpoint (struct gdbarch *gdbarch,
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struct bp_target_info * bp_tgt)
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{
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if (strcmp (current_target.to_shortname, "sim") == 0)
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return soc_gh_add_hardbp (bp_tgt->placed_address);
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return (*current_target.to_insert_hw_breakpoint) (gdbarch, bp_tgt);
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}
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int
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score_target_remove_hw_breakpoint (struct gdbarch *gdbarch,
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struct bp_target_info * bp_tgt)
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{
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if (strcmp (current_target.to_shortname, "sim") == 0)
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return soc_gh_del_hardbp (bp_tgt->placed_address);
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return (*current_target.to_remove_hw_breakpoint) (gdbarch, bp_tgt);
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}
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#endif
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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) ? 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) ? 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, char *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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char 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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int inst_len;
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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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static const gdb_byte *
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score7_breakpoint_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr,
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int *lenptr)
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{
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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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int ret;
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unsigned int raw;
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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 (byte_order == BFD_ENDIAN_BIG)
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{
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if (!(raw & 0x80008000))
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{
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/* 16bits instruction. */
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static gdb_byte big_breakpoint16[] = { 0x60, 0x02 };
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*pcptr &= ~0x1;
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*lenptr = sizeof (big_breakpoint16);
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return big_breakpoint16;
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}
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else
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{
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/* 32bits instruction. */
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static gdb_byte big_breakpoint32[] = { 0x80, 0x00, 0x80, 0x06 };
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*pcptr &= ~0x3;
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*lenptr = sizeof (big_breakpoint32);
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return big_breakpoint32;
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}
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}
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else
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{
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if (!(raw & 0x80008000))
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{
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/* 16bits instruction. */
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static gdb_byte little_breakpoint16[] = { 0x02, 0x60 };
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*pcptr &= ~0x1;
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*lenptr = sizeof (little_breakpoint16);
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return little_breakpoint16;
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}
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else
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{
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/* 32bits instruction. */
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static gdb_byte little_breakpoint32[] = { 0x06, 0x80, 0x00, 0x80 };
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*pcptr &= ~0x3;
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*lenptr = sizeof (little_breakpoint32);
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return little_breakpoint32;
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}
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}
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}
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static const gdb_byte *
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score3_breakpoint_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr,
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int *lenptr)
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{
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enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
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CORE_ADDR adjust_pc = *pcptr;
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int len;
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static gdb_byte score_break_insns[6][6] = {
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/* The following three instructions are big endian. */
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{ 0x00, 0x20 },
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{ 0x80, 0x00, 0x00, 0x06 },
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{ 0x80, 0x00, 0x80, 0x00, 0x00, 0x00 },
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/* The following three instructions are little endian. */
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{ 0x20, 0x00 },
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{ 0x00, 0x80, 0x06, 0x00 },
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{ 0x00, 0x80, 0x00, 0x80, 0x00, 0x00 }};
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gdb_byte *p = NULL;
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int index = 0;
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score3_adjust_pc_and_fetch_inst (&adjust_pc, &len, byte_order);
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index = ((byte_order == BFD_ENDIAN_BIG) ? 0 : 3) + (len / 2 - 1);
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p = score_break_insns[index];
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*pcptr = adjust_pc;
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*lenptr = len;
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return p;
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}
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static CORE_ADDR
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score_adjust_breakpoint_address (struct gdbarch *gdbarch, CORE_ADDR bpaddr)
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{
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CORE_ADDR adjust_pc = bpaddr;
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if (target_mach == bfd_mach_score3)
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score3_adjust_pc_and_fetch_inst (&adjust_pc, NULL,
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gdbarch_byte_order (gdbarch));
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else
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adjust_pc = align_down (adjust_pc, 2);
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return adjust_pc;
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}
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static CORE_ADDR
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score_frame_align (struct gdbarch *gdbarch, CORE_ADDR addr)
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{
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return align_down (addr, 16);
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}
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|
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static void
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score_xfer_register (struct regcache *regcache, int regnum, int length,
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enum bfd_endian endian, gdb_byte *readbuf,
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const gdb_byte *writebuf, int buf_offset)
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{
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int reg_offset = 0;
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gdb_assert (regnum >= 0
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&& regnum < ((target_mach == bfd_mach_score7) ? SCORE7_NUM_REGS : SCORE3_NUM_REGS));
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switch (endian)
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{
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case BFD_ENDIAN_BIG:
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reg_offset = SCORE_REGSIZE - length;
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break;
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case BFD_ENDIAN_LITTLE:
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reg_offset = 0;
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break;
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case BFD_ENDIAN_UNKNOWN:
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reg_offset = 0;
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break;
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default:
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error ("Error: score_xfer_register in file:%s, line:%d!",
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__FILE__, __LINE__);
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}
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|
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if (readbuf != NULL)
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regcache_cooked_read_part (regcache, regnum, reg_offset, length,
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readbuf + buf_offset);
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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 type *func_type,
|
|
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 odd_sized_struct_p;
|
|
int arg_last_part_p = 0;
|
|
|
|
arglen = TYPE_LENGTH (arg_type);
|
|
odd_sized_struct_p = (arglen > SCORE_REGSIZE
|
|
&& arglen % SCORE_REGSIZE != 0);
|
|
|
|
/* 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;
|
|
}
|
|
|
|
static int
|
|
score7_in_function_epilogue_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;
|
|
}
|
|
|
|
static int
|
|
score3_in_function_epilogue_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 char *
|
|
score7_malloc_and_get_memblock (CORE_ADDR addr, CORE_ADDR size)
|
|
{
|
|
int ret;
|
|
char *memblock = NULL;
|
|
|
|
if (size < 0)
|
|
{
|
|
error ("Error: malloc size < 0 in file:%s, line:%d!",
|
|
__FILE__, __LINE__);
|
|
return NULL;
|
|
}
|
|
else if (size == 0)
|
|
return NULL;
|
|
|
|
memblock = (char *) 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 (char *memblock)
|
|
{
|
|
xfree (memblock);
|
|
}
|
|
|
|
static void
|
|
score7_adjust_memblock_ptr (char **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;
|
|
|
|
char *memblock = NULL;
|
|
char *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;
|
|
|
|
CORE_ADDR prev_pc = -1;
|
|
|
|
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;
|
|
|
|
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)
|
|
{
|
|
unsigned int save_v = inst->v;
|
|
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)
|
|
{
|
|
unsigned int save_v = inst->v;
|
|
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 (*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, *this_cache);
|
|
else
|
|
score7_analyze_prologue (start_addr, pc, this_frame, *this_cache);
|
|
}
|
|
|
|
/* Save SP. */
|
|
trad_frame_set_value (cache->saved_regs, SCORE_SP_REGNUM, cache->base);
|
|
|
|
return (*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,
|
|
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 (dirty hack)
|
|
|
|
The core file MUST be generated by GNU/Linux on S+core */
|
|
|
|
static void
|
|
score7_linux_supply_gregset(const struct regset *regset,
|
|
struct regcache *regcache,
|
|
int regnum, const void *gregs_buf, size_t len)
|
|
{
|
|
int regno;
|
|
elf_gregset_t *gregs;
|
|
|
|
gdb_assert (regset != NULL);
|
|
gdb_assert ((regcache != NULL) && (gregs_buf != NULL));
|
|
|
|
gregs = (elf_gregset_t *) gregs_buf;
|
|
|
|
for (regno = 0; regno < 32; regno++)
|
|
if (regnum == -1 || regnum == regno)
|
|
regcache_raw_supply (regcache, regno, gregs->regs + regno);
|
|
|
|
{
|
|
struct sreg {
|
|
int regnum;
|
|
void *buf;
|
|
} sregs [] = {
|
|
{ 55, &(gregs->cel) }, /* CEL */
|
|
{ 54, &(gregs->ceh) }, /* CEH */
|
|
{ 53, &(gregs->sr0) }, /* sr0, i.e. cnt or COUNTER */
|
|
{ 52, &(gregs->sr1) }, /* sr1, i.e. lcr or LDCR */
|
|
{ 51, &(gregs->sr1) }, /* sr2, i.e. scr or STCR */
|
|
|
|
/* Exception occured at this address, exactly the PC we want */
|
|
{ 49, &(gregs->cp0_epc) }, /* PC */
|
|
|
|
{ 38, &(gregs->cp0_ema) }, /* EMA */
|
|
{ 37, &(gregs->cp0_epc) }, /* EPC */
|
|
{ 34, &(gregs->cp0_ecr) }, /* ECR */
|
|
{ 33, &(gregs->cp0_condition) }, /* COND */
|
|
{ 32, &(gregs->cp0_psr) }, /* PSR */
|
|
};
|
|
|
|
for (regno = 0; regno < sizeof(sregs)/sizeof(sregs[0]); regno++)
|
|
if (regnum == -1 || regnum == sregs[regno].regnum)
|
|
regcache_raw_supply (regcache, sregs[regno].regnum, sregs[regno].buf);
|
|
}
|
|
}
|
|
|
|
/* Return the appropriate register set from the core section identified
|
|
by SECT_NAME and SECT_SIZE. */
|
|
|
|
static const struct regset *
|
|
score7_linux_regset_from_core_section(struct gdbarch *gdbarch,
|
|
const char *sect_name, size_t sect_size)
|
|
{
|
|
struct gdbarch_tdep *tdep;
|
|
|
|
gdb_assert (gdbarch != NULL);
|
|
gdb_assert (sect_name != NULL);
|
|
|
|
tdep = gdbarch_tdep (gdbarch);
|
|
|
|
if (strcmp(sect_name, ".reg") == 0 && sect_size == sizeof(elf_gregset_t))
|
|
{
|
|
if (tdep->gregset == NULL)
|
|
tdep->gregset = regset_alloc (gdbarch, score7_linux_supply_gregset, NULL);
|
|
return tdep->gregset;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static struct gdbarch *
|
|
score_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
|
|
{
|
|
struct gdbarch *gdbarch;
|
|
struct gdbarch_tdep *tdep;
|
|
target_mach = info.bfd_arch_info->mach;
|
|
|
|
arches = gdbarch_list_lookup_by_info (arches, &info);
|
|
if (arches != NULL)
|
|
{
|
|
return (arches->gdbarch);
|
|
}
|
|
tdep = xcalloc(1, sizeof(struct gdbarch_tdep));
|
|
gdbarch = gdbarch_alloc (&info, tdep);
|
|
|
|
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_from_pc (gdbarch, score7_breakpoint_from_pc);
|
|
set_gdbarch_skip_prologue (gdbarch, score7_skip_prologue);
|
|
set_gdbarch_in_function_epilogue_p (gdbarch, score7_in_function_epilogue_p);
|
|
set_gdbarch_register_name (gdbarch, score7_register_name);
|
|
set_gdbarch_num_regs (gdbarch, SCORE7_NUM_REGS);
|
|
/* Core file support. */
|
|
set_gdbarch_regset_from_core_section (gdbarch, score7_linux_regset_from_core_section);
|
|
break;
|
|
|
|
case bfd_mach_score3:
|
|
set_gdbarch_breakpoint_from_pc (gdbarch, score3_breakpoint_from_pc);
|
|
set_gdbarch_skip_prologue (gdbarch, score3_skip_prologue);
|
|
set_gdbarch_in_function_epilogue_p (gdbarch, score3_in_function_epilogue_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);
|
|
}
|