mirror of
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cf84fa6bcf
gdb/ChangeLog: * aarch64-tdep.c (aarch64_push_dummy_call): Replace arg with return_method. * alpha-tdep.c (alpha_push_dummy_call): Likewise. * amd64-tdep.c (amd64_push_arguments): Likewise. (amd64_push_dummy_call): Likewise. * amd64-windows-tdep.c (amd64_windows_push_arguments): Likewise. * arc-tdep.c (arc_push_dummy_call): Likewise. * arm-tdep.c (arm_push_dummy_call): Likewise. * avr-tdep.c (avr_push_dummy_call): Likewise. * bfin-tdep.c (bfin_push_dummy_call): Likewise. * cris-tdep.c (cris_push_dummy_call): Likewise. * csky-tdep.c (csky_push_dummy_call): Likewise. * frv-tdep.c (frv_push_dummy_call): Likewise. * gdbarch.c: Regenerate. * gdbarch.h: Regenerate. * gdbarch.sh (gdbarch_push_dummy_call): Replace arg with return_method. * h8300-tdep.c (h8300_push_dummy_call): Likewise. * hppa-tdep.c (hppa32_push_dummy_call): Likewise. (hppa64_push_dummy_call): Likewise. * i386-darwin-tdep.c (i386_darwin_push_dummy_call): Likewise. * i386-tdep.c (i386_push_dummy_call): Likewise. * ia64-tdep.c (ia64_push_dummy_call): Likewise. * infcall.c (call_function_by_hand_dummy): Likewise. * iq2000-tdep.c (iq2000_push_dummy_call): Likewise. * lm32-tdep.c (lm32_push_dummy_call): Likewise. * m32c-tdep.c (m32c_push_dummy_call): Likewise. * m32r-tdep.c (m32r_push_dummy_call): Likewise. * m68hc11-tdep.c (m68hc11_push_dummy_call): Likewise. * m68k-tdep.c (m68k_push_dummy_call): Likewise. * mep-tdep.c (mep_push_dummy_call): Likewise. * mips-tdep.c (mips_eabi_push_dummy_call): Likewise. (mips_n32n64_push_dummy_call): Likewise. (mips_o32_push_dummy_call): Likewise. (mips_o64_push_dummy_call): Likewise. * mn10300-tdep.c (mn10300_push_dummy_call): Likewise. * msp430-tdep.c (msp430_push_dummy_call): Likewise. * nds32-tdep.c (nds32_push_dummy_call): Likewise. * nios2-tdep.c (nios2_push_dummy_call): Likewise. * or1k-tdep.c (or1k_push_dummy_call): Likewise. * ppc-sysv-tdep.c (ppc_sysv_abi_push_dummy_call): Likewise. (ppc64_sysv_abi_push_dummy_call): Likewise. * ppc-tdep.h (ppc_sysv_abi_push_dummy_call): Likewise. (ppc64_sysv_abi_push_dummy_call): Likewise. * riscv-tdep.c (riscv_push_dummy_call): Likewise. * rl78-tdep.c (rl78_push_dummy_call): Likewise. * rs6000-aix-tdep.c (rs6000_push_dummy_call): Likewise. * rs6000-lynx178-tdep.c (rs6000_lynx178_push_dummy_call): Likewise. * rx-tdep.c (rx_push_dummy_call): Likewise. * s390-tdep.c (s390_push_dummy_call): Likewise. * score-tdep.c (score_push_dummy_call): Likewise. * sh-tdep.c (sh_push_dummy_call_fpu): Likewise. (sh_push_dummy_call_nofpu): Likewise. * sparc-tdep.c (sparc32_store_arguments): Likewise. (sparc32_push_dummy_call): Likewise. * sparc64-tdep.c (sparc64_store_arguments): Likewise. (sparc64_push_dummy_call): Likewise. * spu-tdep.c (spu_push_dummy_call): Likewise. * tic6x-tdep.c (tic6x_push_dummy_call): Likewise. * tilegx-tdep.c (tilegx_push_dummy_call): Likewise. * v850-tdep.c (v850_push_dummy_call): Likewise. * vax-tdep.c (vax_push_dummy_call): Likewise. * xstormy16-tdep.c (xstormy16_push_dummy_call): Likewise. * xtensa-tdep.c (xtensa_push_dummy_call): Likewise.
2296 lines
62 KiB
C
2296 lines
62 KiB
C
/* Target-dependent code for the CSKY architecture, for GDB.
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Copyright (C) 2010-2018 Free Software Foundation, Inc.
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Contributed by C-SKY Microsystems and Mentor Graphics.
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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 "frame.h"
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#include "inferior.h"
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#include "symtab.h"
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#include "value.h"
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#include "gdbcmd.h"
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#include "language.h"
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#include "gdbcore.h"
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#include "symfile.h"
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#include "objfiles.h"
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#include "gdbtypes.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 "osabi.h"
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#include "block.h"
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#include "reggroups.h"
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#include "elf/csky.h"
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#include "elf-bfd.h"
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#include "symcat.h"
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#include "sim-regno.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 "infcall.h"
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#include "floatformat.h"
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#include "remote.h"
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#include "target-descriptions.h"
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#include "dwarf2-frame.h"
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#include "user-regs.h"
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#include "valprint.h"
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#include "reggroups.h"
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#include "csky-tdep.h"
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#include "regset.h"
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#include "block.h"
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#include "opcode/csky.h"
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#include <algorithm>
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#include <vector>
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/* Control debugging information emitted in this file. */
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static int csky_debug = 0;
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static struct reggroup *cr_reggroup;
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static struct reggroup *fr_reggroup;
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static struct reggroup *vr_reggroup;
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static struct reggroup *mmu_reggroup;
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static struct reggroup *prof_reggroup;
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/* Convenience function to print debug messages in prologue analysis. */
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static void
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print_savedreg_msg (int regno, int offsets[], bool print_continuing)
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{
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fprintf_unfiltered (gdb_stdlog, "csky: r%d saved at offset 0x%x\n",
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regno, offsets[regno]);
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if (print_continuing)
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fprintf_unfiltered (gdb_stdlog, "csky: continuing\n");
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}
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/* Check whether the instruction at ADDR is 16-bit or not. */
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static int
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csky_pc_is_csky16 (struct gdbarch *gdbarch, CORE_ADDR addr)
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{
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gdb_byte target_mem[2];
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int status;
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unsigned int insn;
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int ret = 1;
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enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
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status = target_read_memory (addr, target_mem, 2);
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/* Assume a 16-bit instruction if we can't read memory. */
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if (status)
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return 1;
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/* Get instruction from memory. */
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insn = extract_unsigned_integer (target_mem, 2, byte_order);
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if ((insn & CSKY_32_INSN_MASK) == CSKY_32_INSN_MASK)
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ret = 0;
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else if (insn == CSKY_BKPT_INSN)
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{
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/* Check for 32-bit bkpt instruction which is all 0. */
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status = target_read_memory (addr + 2, target_mem, 2);
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if (status)
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return 1;
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insn = extract_unsigned_integer (target_mem, 2, byte_order);
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if (insn == CSKY_BKPT_INSN)
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ret = 0;
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}
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return ret;
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}
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/* Get one instruction at ADDR and store it in INSN. Return 2 for
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a 16-bit instruction or 4 for a 32-bit instruction. */
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static int
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csky_get_insn (struct gdbarch *gdbarch, CORE_ADDR addr, unsigned int *insn)
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{
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gdb_byte target_mem[2];
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unsigned int insn_type;
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int status;
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int insn_len = 2;
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enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
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status = target_read_memory (addr, target_mem, 2);
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if (status)
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memory_error (TARGET_XFER_E_IO, addr);
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insn_type = extract_unsigned_integer (target_mem, 2, byte_order);
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if (CSKY_32_INSN_MASK == (insn_type & CSKY_32_INSN_MASK))
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{
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status = target_read_memory (addr + 2, target_mem, 2);
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if (status)
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memory_error (TARGET_XFER_E_IO, addr);
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insn_type = ((insn_type << 16)
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| extract_unsigned_integer (target_mem, 2, byte_order));
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insn_len = 4;
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}
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*insn = insn_type;
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return insn_len;
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}
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/* Implement the read_pc gdbarch method. */
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static CORE_ADDR
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csky_read_pc (readable_regcache *regcache)
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{
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ULONGEST pc;
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regcache->cooked_read (CSKY_PC_REGNUM, &pc);
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return pc;
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}
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/* Implement the write_pc gdbarch method. */
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static void
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csky_write_pc (regcache *regcache, CORE_ADDR val)
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{
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regcache_cooked_write_unsigned (regcache, CSKY_PC_REGNUM, val);
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}
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/* Implement the unwind_sp gdbarch method. */
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static CORE_ADDR
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csky_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, CSKY_SP_REGNUM);
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}
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/* C-Sky ABI register names. */
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static const char *csky_register_names[] =
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{
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/* General registers 0 - 31. */
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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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/* DSP hilo registers 36 and 37. */
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"", "", "", "", "hi", "lo", "", "",
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/* FPU/VPU general registers 40 - 71. */
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"fr0", "fr1", "fr2", "fr3", "fr4", "fr5", "fr6", "fr7",
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"fr8", "fr9", "fr10", "fr11", "fr12", "fr13", "fr14", "fr15",
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"vr0", "vr1", "vr2", "vr3", "vr4", "vr5", "vr6", "vr7",
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"vr8", "vr9", "vr10", "vr11", "vr12", "vr13", "vr14", "vr15",
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/* Program counter 72. */
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"pc",
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/* Optional registers (ar) 73 - 88. */
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"ar0", "ar1", "ar2", "ar3", "ar4", "ar5", "ar6", "ar7",
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"ar8", "ar9", "ar10", "ar11", "ar12", "ar13", "ar14", "ar15",
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/* Control registers (cr) 89 - 119. */
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"psr", "vbr", "epsr", "fpsr", "epc", "fpc", "ss0", "ss1",
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"ss2", "ss3", "ss4", "gcr", "gsr", "cr13", "cr14", "cr15",
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"cr16", "cr17", "cr18", "cr19", "cr20", "cr21", "cr22", "cr23",
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"cr24", "cr25", "cr26", "cr27", "cr28", "cr29", "cr30", "cr31",
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/* FPU/VPU control registers 121 ~ 123. */
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/* User sp 127. */
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"fid", "fcr", "fesr", "", "", "", "usp",
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/* MMU control registers: 128 - 136. */
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"mcr0", "mcr2", "mcr3", "mcr4", "mcr6", "mcr8", "mcr29", "mcr30",
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"mcr31", "", "", "",
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/* Profiling control registers 140 - 143. */
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/* Profiling software general registers 144 - 157. */
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"profcr0", "profcr1", "profcr2", "profcr3", "profsgr0", "profsgr1",
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"profsgr2", "profsgr3", "profsgr4", "profsgr5", "profsgr6", "profsgr7",
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"profsgr8", "profsgr9", "profsgr10","profsgr11","profsgr12", "profsgr13",
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"", "",
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/* Profiling architecture general registers 160 - 174. */
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"profagr0", "profagr1", "profagr2", "profagr3", "profagr4", "profagr5",
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"profagr6", "profagr7", "profagr8", "profagr9", "profagr10","profagr11",
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"profagr12","profagr13","profagr14", "",
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/* Profiling extension general registers 176 - 188. */
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"profxgr0", "profxgr1", "profxgr2", "profxgr3", "profxgr4", "profxgr5",
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"profxgr6", "profxgr7", "profxgr8", "profxgr9", "profxgr10","profxgr11",
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"profxgr12",
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/* Control registers in bank1. */
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"", "", "", "", "", "", "", "",
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"", "", "", "", "", "", "", "",
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"cp1cr16", "cp1cr17", "cp1cr18", "cp1cr19", "cp1cr20", "", "", "",
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"", "", "", "", "", "", "", "",
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/* Control registers in bank3 (ICE). */
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"sepsr", "sevbr", "seepsr", "", "seepc", "", "nsssp", "seusp",
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"sedcr", "", "", "", "", "", "", "",
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"", "", "", "", "", "", "", "",
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"", "", "", "", "", "", "", ""
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};
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/* Implement the register_name gdbarch method. */
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static const char *
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csky_register_name (struct gdbarch *gdbarch, int reg_nr)
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{
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if (tdesc_has_registers (gdbarch_target_desc (gdbarch)))
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return tdesc_register_name (gdbarch, reg_nr);
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if (reg_nr < 0)
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return NULL;
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if (reg_nr >= gdbarch_num_regs (gdbarch))
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return NULL;
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return csky_register_names[reg_nr];
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}
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/* Construct vector type for vrx registers. */
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static struct type *
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csky_vector_type (struct gdbarch *gdbarch)
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{
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const struct builtin_type *bt = builtin_type (gdbarch);
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struct type *t;
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t = arch_composite_type (gdbarch, "__gdb_builtin_type_vec128i",
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TYPE_CODE_UNION);
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append_composite_type_field (t, "u32",
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init_vector_type (bt->builtin_int32, 4));
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append_composite_type_field (t, "u16",
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init_vector_type (bt->builtin_int16, 8));
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append_composite_type_field (t, "u8",
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init_vector_type (bt->builtin_int8, 16));
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TYPE_VECTOR (t) = 1;
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TYPE_NAME (t) = "builtin_type_vec128i";
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return t;
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}
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/* Return the GDB type object for the "standard" data type
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of data in register N. */
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static struct type *
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csky_register_type (struct gdbarch *gdbarch, int reg_nr)
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{
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/* PC, EPC, FPC is a text pointer. */
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if ((reg_nr == CSKY_PC_REGNUM) || (reg_nr == CSKY_EPC_REGNUM)
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|| (reg_nr == CSKY_FPC_REGNUM))
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return builtin_type (gdbarch)->builtin_func_ptr;
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/* VBR is a data pointer. */
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if (reg_nr == CSKY_VBR_REGNUM)
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return builtin_type (gdbarch)->builtin_data_ptr;
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/* Float register has 64 bits, and only in ck810. */
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if ((reg_nr >=CSKY_FR0_REGNUM) && (reg_nr <= CSKY_FR0_REGNUM + 15))
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return arch_float_type (gdbarch, 64, "builtin_type_csky_ext",
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floatformats_ieee_double);
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/* Vector register has 128 bits, and only in ck810. */
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if ((reg_nr >= CSKY_VR0_REGNUM) && (reg_nr <= CSKY_VR0_REGNUM + 15))
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return csky_vector_type (gdbarch);
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/* Profiling general register has 48 bits, we use 64bit. */
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if ((reg_nr >= CSKY_PROFGR_REGNUM) && (reg_nr <= CSKY_PROFGR_REGNUM + 44))
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return builtin_type (gdbarch)->builtin_uint64;
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if (reg_nr == CSKY_SP_REGNUM)
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return builtin_type (gdbarch)->builtin_data_ptr;
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/* Others are 32 bits. */
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return builtin_type (gdbarch)->builtin_int32;
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}
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/* Data structure to marshall items in a dummy stack frame when
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calling a function in the inferior. */
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struct stack_item
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{
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stack_item (int len_, const gdb_byte *data_)
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: len (len_), data (data_)
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{}
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int len;
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const gdb_byte *data;
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};
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/* Implement the push_dummy_call gdbarch method. */
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static CORE_ADDR
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csky_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
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struct regcache *regcache, CORE_ADDR bp_addr,
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int nargs, struct value **args, CORE_ADDR sp,
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function_call_return_method return_method,
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CORE_ADDR struct_addr)
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{
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int argnum;
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int argreg = CSKY_ABI_A0_REGNUM;
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int last_arg_regnum = CSKY_ABI_LAST_ARG_REGNUM;
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int need_dummy_stack = 0;
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enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
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std::vector<stack_item> stack_items;
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/* Set the return address. For CSKY, the return breakpoint is
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always at BP_ADDR. */
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regcache_cooked_write_unsigned (regcache, CSKY_LR_REGNUM, bp_addr);
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/* The struct_return pointer occupies the first parameter
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passing register. */
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if (return_method == return_method_struct)
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{
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if (csky_debug)
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{
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fprintf_unfiltered (gdb_stdlog,
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"csky: struct return in %s = %s\n",
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gdbarch_register_name (gdbarch, argreg),
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paddress (gdbarch, struct_addr));
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}
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regcache_cooked_write_unsigned (regcache, argreg, struct_addr);
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argreg++;
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}
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/* Put parameters into argument registers in REGCACHE.
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In ABI argument registers are r0 through r3. */
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for (argnum = 0; argnum < nargs; argnum++)
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{
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int len;
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struct type *arg_type;
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const gdb_byte *val;
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arg_type = check_typedef (value_type (args[argnum]));
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len = TYPE_LENGTH (arg_type);
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val = value_contents (args[argnum]);
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/* Copy the argument to argument registers or the dummy stack.
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Large arguments are split between registers and stack.
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If len < 4, there is no need to worry about endianness since
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the arguments will always be stored in the low address. */
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if (len < 4)
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{
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CORE_ADDR regval
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= extract_unsigned_integer (val, len, byte_order);
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|
regcache_cooked_write_unsigned (regcache, argreg, regval);
|
|
argreg++;
|
|
}
|
|
else
|
|
{
|
|
while (len > 0)
|
|
{
|
|
int partial_len = len < 4 ? len : 4;
|
|
if (argreg <= last_arg_regnum)
|
|
{
|
|
/* The argument is passed in an argument register. */
|
|
CORE_ADDR regval
|
|
= extract_unsigned_integer (val, partial_len,
|
|
byte_order);
|
|
if (byte_order == BFD_ENDIAN_BIG)
|
|
regval <<= (4 - partial_len) * 8;
|
|
|
|
/* Put regval into register in REGCACHE. */
|
|
regcache_cooked_write_unsigned (regcache, argreg,
|
|
regval);
|
|
argreg++;
|
|
}
|
|
else
|
|
{
|
|
/* The argument should be pushed onto the dummy stack. */
|
|
stack_items.emplace_back (4, val);
|
|
need_dummy_stack += 4;
|
|
}
|
|
len -= partial_len;
|
|
val += partial_len;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Transfer the dummy stack frame to the target. */
|
|
std::vector<stack_item>::reverse_iterator iter;
|
|
for (iter = stack_items.rbegin (); iter != stack_items.rend (); ++iter)
|
|
{
|
|
sp -= iter->len;
|
|
write_memory (sp, iter->data, iter->len);
|
|
}
|
|
|
|
/* Finally, update the SP register. */
|
|
regcache_cooked_write_unsigned (regcache, CSKY_SP_REGNUM, sp);
|
|
return sp;
|
|
}
|
|
|
|
/* Implement the return_value gdbarch method. */
|
|
|
|
static enum return_value_convention
|
|
csky_return_value (struct gdbarch *gdbarch, struct value *function,
|
|
struct type *valtype, struct regcache *regcache,
|
|
gdb_byte *readbuf, const gdb_byte *writebuf)
|
|
{
|
|
CORE_ADDR regval;
|
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
|
int len = TYPE_LENGTH (valtype);
|
|
unsigned int ret_regnum = CSKY_RET_REGNUM;
|
|
|
|
/* Csky abi specifies that return values larger than 8 bytes
|
|
are put on the stack. */
|
|
if (len > 8)
|
|
return RETURN_VALUE_STRUCT_CONVENTION;
|
|
else
|
|
{
|
|
if (readbuf != NULL)
|
|
{
|
|
ULONGEST tmp;
|
|
/* By using store_unsigned_integer we avoid having to do
|
|
anything special for small big-endian values. */
|
|
regcache->cooked_read (ret_regnum, &tmp);
|
|
store_unsigned_integer (readbuf, (len > 4 ? 4 : len),
|
|
byte_order, tmp);
|
|
if (len > 4)
|
|
{
|
|
regcache->cooked_read (ret_regnum + 1, &tmp);
|
|
store_unsigned_integer (readbuf + 4, 4, byte_order, tmp);
|
|
}
|
|
}
|
|
if (writebuf != NULL)
|
|
{
|
|
regval = extract_unsigned_integer (writebuf, len > 4 ? 4 : len,
|
|
byte_order);
|
|
regcache_cooked_write_unsigned (regcache, ret_regnum, regval);
|
|
if (len > 4)
|
|
{
|
|
regval = extract_unsigned_integer ((gdb_byte *) writebuf + 4,
|
|
4, byte_order);
|
|
regcache_cooked_write_unsigned (regcache, ret_regnum + 1,
|
|
regval);
|
|
}
|
|
|
|
}
|
|
return RETURN_VALUE_REGISTER_CONVENTION;
|
|
}
|
|
}
|
|
|
|
/* Implement the frame_align gdbarch method.
|
|
|
|
Adjust the address downward (direction of stack growth) so that it
|
|
is correctly aligned for a new stack frame. */
|
|
|
|
static CORE_ADDR
|
|
csky_frame_align (struct gdbarch *gdbarch, CORE_ADDR addr)
|
|
{
|
|
return align_down (addr, 4);
|
|
}
|
|
|
|
/* Unwind cache used for gdbarch fallback unwinder. */
|
|
|
|
struct csky_unwind_cache
|
|
{
|
|
/* The stack pointer at the time this frame was created; i.e. the
|
|
caller's stack pointer when this function was called. It is used
|
|
to identify this frame. */
|
|
CORE_ADDR prev_sp;
|
|
|
|
/* The frame base for this frame is just prev_sp - frame size.
|
|
FRAMESIZE is the distance from the frame pointer to the
|
|
initial stack pointer. */
|
|
int framesize;
|
|
|
|
/* The register used to hold the frame pointer for this frame. */
|
|
int framereg;
|
|
|
|
/* Saved register offsets. */
|
|
struct trad_frame_saved_reg *saved_regs;
|
|
};
|
|
|
|
/* Do prologue analysis, returning the PC of the first instruction
|
|
after the function prologue. */
|
|
|
|
static CORE_ADDR
|
|
csky_analyze_prologue (struct gdbarch *gdbarch,
|
|
CORE_ADDR start_pc,
|
|
CORE_ADDR limit_pc,
|
|
CORE_ADDR end_pc,
|
|
struct frame_info *this_frame,
|
|
struct csky_unwind_cache *this_cache,
|
|
lr_type_t lr_type)
|
|
{
|
|
CORE_ADDR addr;
|
|
unsigned int insn, rn;
|
|
int framesize = 0;
|
|
int stacksize = 0;
|
|
int register_offsets[CSKY_NUM_GREGS_SAVED_GREGS];
|
|
int insn_len;
|
|
/* For adjusting fp. */
|
|
int is_fp_saved = 0;
|
|
int adjust_fp = 0;
|
|
|
|
/* REGISTER_OFFSETS will contain offsets from the top of the frame
|
|
(NOT the frame pointer) for the various saved registers, or -1
|
|
if the register is not saved. */
|
|
for (rn = 0; rn < CSKY_NUM_GREGS_SAVED_GREGS; rn++)
|
|
register_offsets[rn] = -1;
|
|
|
|
/* Analyze the prologue. Things we determine from analyzing the
|
|
prologue include the size of the frame and which registers are
|
|
saved (and where). */
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: Scanning prologue: start_pc = 0x%x,"
|
|
"limit_pc = 0x%x\n", (unsigned int) start_pc,
|
|
(unsigned int) limit_pc);
|
|
}
|
|
|
|
/* Default to 16 bit instruction. */
|
|
insn_len = 2;
|
|
stacksize = 0;
|
|
for (addr = start_pc; addr < limit_pc; addr += insn_len)
|
|
{
|
|
/* Get next insn. */
|
|
insn_len = csky_get_insn (gdbarch, addr, &insn);
|
|
|
|
/* Check if 32 bit. */
|
|
if (insn_len == 4)
|
|
{
|
|
/* subi32 sp,sp oimm12. */
|
|
if (CSKY_32_IS_SUBI0 (insn))
|
|
{
|
|
/* Got oimm12. */
|
|
int offset = CSKY_32_SUBI_IMM (insn);
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: got subi sp,%d; continuing\n",
|
|
offset);
|
|
}
|
|
stacksize += offset;
|
|
continue;
|
|
}
|
|
/* stm32 ry-rz,(sp). */
|
|
else if (CSKY_32_IS_STMx0 (insn))
|
|
{
|
|
/* Spill register(s). */
|
|
int start_register;
|
|
int reg_count;
|
|
int offset;
|
|
|
|
/* BIG WARNING! The CKCore ABI does not restrict functions
|
|
to taking only one stack allocation. Therefore, when
|
|
we save a register, we record the offset of where it was
|
|
saved relative to the current stacksize. This will
|
|
then give an offset from the SP upon entry to our
|
|
function. Remember, stacksize is NOT constant until
|
|
we're done scanning the prologue. */
|
|
start_register = CSKY_32_STM_VAL_REGNUM (insn);
|
|
reg_count = CSKY_32_STM_SIZE (insn);
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: got stm r%d-r%d,(sp)\n",
|
|
start_register,
|
|
start_register + reg_count);
|
|
}
|
|
|
|
for (rn = start_register, offset = 0;
|
|
rn <= start_register + reg_count;
|
|
rn++, offset += 4)
|
|
{
|
|
register_offsets[rn] = stacksize - offset;
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: r%d saved at 0x%x"
|
|
" (offset %d)\n",
|
|
rn, register_offsets[rn],
|
|
offset);
|
|
}
|
|
}
|
|
if (csky_debug)
|
|
fprintf_unfiltered (gdb_stdlog, "csky: continuing\n");
|
|
continue;
|
|
}
|
|
/* stw ry,(sp,disp). */
|
|
else if (CSKY_32_IS_STWx0 (insn))
|
|
{
|
|
/* Spill register: see note for IS_STM above. */
|
|
int disp;
|
|
|
|
rn = CSKY_32_ST_VAL_REGNUM (insn);
|
|
disp = CSKY_32_ST_OFFSET (insn);
|
|
register_offsets[rn] = stacksize - disp;
|
|
if (csky_debug)
|
|
print_savedreg_msg (rn, register_offsets, true);
|
|
continue;
|
|
}
|
|
else if (CSKY_32_IS_MOV_FP_SP (insn))
|
|
{
|
|
/* SP is saved to FP reg, means code afer prologue may
|
|
modify SP. */
|
|
is_fp_saved = 1;
|
|
adjust_fp = stacksize;
|
|
continue;
|
|
}
|
|
else if (CSKY_32_IS_MFCR_EPSR (insn))
|
|
{
|
|
unsigned int insn2;
|
|
addr += 4;
|
|
int mfcr_regnum = insn & 0x1f;
|
|
insn_len = csky_get_insn (gdbarch, addr, &insn2);
|
|
if (insn_len == 2)
|
|
{
|
|
int stw_regnum = (insn2 >> 5) & 0x7;
|
|
if (CSKY_16_IS_STWx0 (insn2) && (mfcr_regnum == stw_regnum))
|
|
{
|
|
int offset;
|
|
|
|
/* CSKY_EPSR_REGNUM. */
|
|
rn = CSKY_NUM_GREGS;
|
|
offset = CSKY_16_STWx0_OFFSET (insn2);
|
|
register_offsets[rn] = stacksize - offset;
|
|
if (csky_debug)
|
|
print_savedreg_msg (rn, register_offsets, true);
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
/* INSN_LEN == 4. */
|
|
int stw_regnum = (insn2 >> 21) & 0x1f;
|
|
if (CSKY_32_IS_STWx0 (insn2) && (mfcr_regnum == stw_regnum))
|
|
{
|
|
int offset;
|
|
|
|
/* CSKY_EPSR_REGNUM. */
|
|
rn = CSKY_NUM_GREGS;
|
|
offset = CSKY_32_ST_OFFSET (insn2);
|
|
register_offsets[rn] = framesize - offset;
|
|
if (csky_debug)
|
|
print_savedreg_msg (rn, register_offsets, true);
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
else if (CSKY_32_IS_MFCR_FPSR (insn))
|
|
{
|
|
unsigned int insn2;
|
|
addr += 4;
|
|
int mfcr_regnum = insn & 0x1f;
|
|
insn_len = csky_get_insn (gdbarch, addr, &insn2);
|
|
if (insn_len == 2)
|
|
{
|
|
int stw_regnum = (insn2 >> 5) & 0x7;
|
|
if (CSKY_16_IS_STWx0 (insn2) && (mfcr_regnum
|
|
== stw_regnum))
|
|
{
|
|
int offset;
|
|
|
|
/* CSKY_FPSR_REGNUM. */
|
|
rn = CSKY_NUM_GREGS + 1;
|
|
offset = CSKY_16_STWx0_OFFSET (insn2);
|
|
register_offsets[rn] = stacksize - offset;
|
|
if (csky_debug)
|
|
print_savedreg_msg (rn, register_offsets, true);
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
/* INSN_LEN == 4. */
|
|
int stw_regnum = (insn2 >> 21) & 0x1f;
|
|
if (CSKY_32_IS_STWx0 (insn2) && (mfcr_regnum == stw_regnum))
|
|
{
|
|
int offset;
|
|
|
|
/* CSKY_FPSR_REGNUM. */
|
|
rn = CSKY_NUM_GREGS + 1;
|
|
offset = CSKY_32_ST_OFFSET (insn2);
|
|
register_offsets[rn] = framesize - offset;
|
|
if (csky_debug)
|
|
print_savedreg_msg (rn, register_offsets, true);
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
else if (CSKY_32_IS_MFCR_EPC (insn))
|
|
{
|
|
unsigned int insn2;
|
|
addr += 4;
|
|
int mfcr_regnum = insn & 0x1f;
|
|
insn_len = csky_get_insn (gdbarch, addr, &insn2);
|
|
if (insn_len == 2)
|
|
{
|
|
int stw_regnum = (insn2 >> 5) & 0x7;
|
|
if (CSKY_16_IS_STWx0 (insn2) && (mfcr_regnum == stw_regnum))
|
|
{
|
|
int offset;
|
|
|
|
/* CSKY_EPC_REGNUM. */
|
|
rn = CSKY_NUM_GREGS + 2;
|
|
offset = CSKY_16_STWx0_OFFSET (insn2);
|
|
register_offsets[rn] = stacksize - offset;
|
|
if (csky_debug)
|
|
print_savedreg_msg (rn, register_offsets, true);
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
/* INSN_LEN == 4. */
|
|
int stw_regnum = (insn2 >> 21) & 0x1f;
|
|
if (CSKY_32_IS_STWx0 (insn2) && (mfcr_regnum == stw_regnum))
|
|
{
|
|
int offset;
|
|
|
|
/* CSKY_EPC_REGNUM. */
|
|
rn = CSKY_NUM_GREGS + 2;
|
|
offset = CSKY_32_ST_OFFSET (insn2);
|
|
register_offsets[rn] = framesize - offset;
|
|
if (csky_debug)
|
|
print_savedreg_msg (rn, register_offsets, true);
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
else if (CSKY_32_IS_MFCR_FPC (insn))
|
|
{
|
|
unsigned int insn2;
|
|
addr += 4;
|
|
int mfcr_regnum = insn & 0x1f;
|
|
insn_len = csky_get_insn (gdbarch, addr, &insn2);
|
|
if (insn_len == 2)
|
|
{
|
|
int stw_regnum = (insn2 >> 5) & 0x7;
|
|
if (CSKY_16_IS_STWx0 (insn2) && (mfcr_regnum == stw_regnum))
|
|
{
|
|
int offset;
|
|
|
|
/* CSKY_FPC_REGNUM. */
|
|
rn = CSKY_NUM_GREGS + 3;
|
|
offset = CSKY_16_STWx0_OFFSET (insn2);
|
|
register_offsets[rn] = stacksize - offset;
|
|
if (csky_debug)
|
|
print_savedreg_msg (rn, register_offsets, true);
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
/* INSN_LEN == 4. */
|
|
int stw_regnum = (insn2 >> 21) & 0x1f;
|
|
if (CSKY_32_IS_STWx0 (insn2) && (mfcr_regnum == stw_regnum))
|
|
{
|
|
int offset;
|
|
|
|
/* CSKY_FPC_REGNUM. */
|
|
rn = CSKY_NUM_GREGS + 3;
|
|
offset = CSKY_32_ST_OFFSET (insn2);
|
|
register_offsets[rn] = framesize - offset;
|
|
if (csky_debug)
|
|
print_savedreg_msg (rn, register_offsets, true);
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
else if (CSKY_32_IS_PUSH (insn))
|
|
{
|
|
/* Push for 32_bit. */
|
|
int offset = 0;
|
|
if (CSKY_32_IS_PUSH_R29 (insn))
|
|
{
|
|
stacksize += 4;
|
|
register_offsets[29] = stacksize;
|
|
if (csky_debug)
|
|
print_savedreg_msg (29, register_offsets, false);
|
|
offset += 4;
|
|
}
|
|
if (CSKY_32_PUSH_LIST2 (insn))
|
|
{
|
|
int num = CSKY_32_PUSH_LIST2 (insn);
|
|
int tmp = 0;
|
|
stacksize += num * 4;
|
|
offset += num * 4;
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: push regs_array: r16-r%d\n",
|
|
16 + num - 1);
|
|
}
|
|
for (rn = 16; rn <= 16 + num - 1; rn++)
|
|
{
|
|
register_offsets[rn] = stacksize - tmp;
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: r%d saved at 0x%x"
|
|
" (offset %d)\n", rn,
|
|
register_offsets[rn], tmp);
|
|
}
|
|
tmp += 4;
|
|
}
|
|
}
|
|
if (CSKY_32_IS_PUSH_R15 (insn))
|
|
{
|
|
stacksize += 4;
|
|
register_offsets[15] = stacksize;
|
|
if (csky_debug)
|
|
print_savedreg_msg (15, register_offsets, false);
|
|
offset += 4;
|
|
}
|
|
if (CSKY_32_PUSH_LIST1 (insn))
|
|
{
|
|
int num = CSKY_32_PUSH_LIST1 (insn);
|
|
int tmp = 0;
|
|
stacksize += num * 4;
|
|
offset += num * 4;
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: push regs_array: r4-r%d\n",
|
|
4 + num - 1);
|
|
}
|
|
for (rn = 4; rn <= 4 + num - 1; rn++)
|
|
{
|
|
register_offsets[rn] = stacksize - tmp;
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: r%d saved at 0x%x"
|
|
" (offset %d)\n", rn,
|
|
register_offsets[rn], tmp);
|
|
}
|
|
tmp += 4;
|
|
}
|
|
}
|
|
|
|
framesize = stacksize;
|
|
if (csky_debug)
|
|
fprintf_unfiltered (gdb_stdlog, "csky: continuing\n");
|
|
continue;
|
|
}
|
|
else if (CSKY_32_IS_LRW4 (insn) || CSKY_32_IS_MOVI4 (insn)
|
|
|| CSKY_32_IS_MOVIH4 (insn) || CSKY_32_IS_BMASKI4 (insn))
|
|
{
|
|
int adjust = 0;
|
|
int offset = 0;
|
|
unsigned int insn2;
|
|
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: looking at large frame\n");
|
|
}
|
|
if (CSKY_32_IS_LRW4 (insn))
|
|
{
|
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
|
int literal_addr = (addr + ((insn & 0xffff) << 2))
|
|
& 0xfffffffc;
|
|
adjust = read_memory_unsigned_integer (literal_addr, 4,
|
|
byte_order);
|
|
}
|
|
else if (CSKY_32_IS_MOVI4 (insn))
|
|
adjust = (insn & 0xffff);
|
|
else if (CSKY_32_IS_MOVIH4 (insn))
|
|
adjust = (insn & 0xffff) << 16;
|
|
else
|
|
{
|
|
/* CSKY_32_IS_BMASKI4 (insn). */
|
|
adjust = (1 << (((insn & 0x3e00000) >> 21) + 1)) - 1;
|
|
}
|
|
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: base stacksize=0x%x\n", adjust);
|
|
|
|
/* May have zero or more insns which modify r4. */
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: looking for r4 adjusters...\n");
|
|
}
|
|
|
|
offset = 4;
|
|
insn_len = csky_get_insn (gdbarch, addr + offset, &insn2);
|
|
while (CSKY_IS_R4_ADJUSTER (insn2))
|
|
{
|
|
if (CSKY_32_IS_ADDI4 (insn2))
|
|
{
|
|
int imm = (insn2 & 0xfff) + 1;
|
|
adjust += imm;
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: addi r4,%d\n", imm);
|
|
}
|
|
}
|
|
else if (CSKY_32_IS_SUBI4 (insn2))
|
|
{
|
|
int imm = (insn2 & 0xfff) + 1;
|
|
adjust -= imm;
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: subi r4,%d\n", imm);
|
|
}
|
|
}
|
|
else if (CSKY_32_IS_NOR4 (insn2))
|
|
{
|
|
adjust = ~adjust;
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: nor r4,r4,r4\n");
|
|
}
|
|
}
|
|
else if (CSKY_32_IS_ROTLI4 (insn2))
|
|
{
|
|
int imm = ((insn2 >> 21) & 0x1f);
|
|
int temp = adjust >> (32 - imm);
|
|
adjust <<= imm;
|
|
adjust |= temp;
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: rotli r4,r4,%d\n", imm);
|
|
}
|
|
}
|
|
else if (CSKY_32_IS_LISI4 (insn2))
|
|
{
|
|
int imm = ((insn2 >> 21) & 0x1f);
|
|
adjust <<= imm;
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: lsli r4,r4,%d\n", imm);
|
|
}
|
|
}
|
|
else if (CSKY_32_IS_BSETI4 (insn2))
|
|
{
|
|
int imm = ((insn2 >> 21) & 0x1f);
|
|
adjust |= (1 << imm);
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: bseti r4,r4 %d\n", imm);
|
|
}
|
|
}
|
|
else if (CSKY_32_IS_BCLRI4 (insn2))
|
|
{
|
|
int imm = ((insn2 >> 21) & 0x1f);
|
|
adjust &= ~(1 << imm);
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: bclri r4,r4 %d\n", imm);
|
|
}
|
|
}
|
|
else if (CSKY_32_IS_IXH4 (insn2))
|
|
{
|
|
adjust *= 3;
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: ixh r4,r4,r4\n");
|
|
}
|
|
}
|
|
else if (CSKY_32_IS_IXW4 (insn2))
|
|
{
|
|
adjust *= 5;
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: ixw r4,r4,r4\n");
|
|
}
|
|
}
|
|
else if (CSKY_16_IS_ADDI4 (insn2))
|
|
{
|
|
int imm = (insn2 & 0xff) + 1;
|
|
adjust += imm;
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: addi r4,%d\n", imm);
|
|
}
|
|
}
|
|
else if (CSKY_16_IS_SUBI4 (insn2))
|
|
{
|
|
int imm = (insn2 & 0xff) + 1;
|
|
adjust -= imm;
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: subi r4,%d\n", imm);
|
|
}
|
|
}
|
|
else if (CSKY_16_IS_NOR4 (insn2))
|
|
{
|
|
adjust = ~adjust;
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: nor r4,r4\n");
|
|
}
|
|
}
|
|
else if (CSKY_16_IS_BSETI4 (insn2))
|
|
{
|
|
int imm = (insn2 & 0x1f);
|
|
adjust |= (1 << imm);
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: bseti r4, %d\n", imm);
|
|
}
|
|
}
|
|
else if (CSKY_16_IS_BCLRI4 (insn2))
|
|
{
|
|
int imm = (insn2 & 0x1f);
|
|
adjust &= ~(1 << imm);
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: bclri r4, %d\n", imm);
|
|
}
|
|
}
|
|
else if (CSKY_16_IS_LSLI4 (insn2))
|
|
{
|
|
int imm = (insn2 & 0x1f);
|
|
adjust <<= imm;
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: lsli r4,r4, %d\n", imm);
|
|
}
|
|
}
|
|
|
|
offset += insn_len;
|
|
insn_len = csky_get_insn (gdbarch, addr + offset, &insn2);
|
|
};
|
|
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog, "csky: done looking for"
|
|
" r4 adjusters\n");
|
|
}
|
|
|
|
/* If the next insn adjusts the stack pointer, we keep
|
|
everything; if not, we scrap it and we've found the
|
|
end of the prologue. */
|
|
if (CSKY_IS_SUBU4 (insn2))
|
|
{
|
|
addr += offset;
|
|
stacksize += adjust;
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: found stack adjustment of"
|
|
" 0x%x bytes.\n", adjust);
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: skipping to new address %s\n",
|
|
core_addr_to_string_nz (addr));
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: continuing\n");
|
|
}
|
|
continue;
|
|
}
|
|
|
|
/* None of these instructions are prologue, so don't touch
|
|
anything. */
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: no subu sp,sp,r4; NOT altering"
|
|
" stacksize.\n");
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* insn_len != 4. */
|
|
|
|
/* subi.sp sp,disp. */
|
|
if (CSKY_16_IS_SUBI0 (insn))
|
|
{
|
|
int offset = CSKY_16_SUBI_IMM (insn);
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: got subi r0,%d; continuing\n",
|
|
offset);
|
|
}
|
|
stacksize += offset;
|
|
continue;
|
|
}
|
|
/* stw.16 rz,(sp,disp). */
|
|
else if (CSKY_16_IS_STWx0 (insn))
|
|
{
|
|
/* Spill register: see note for IS_STM above. */
|
|
int disp;
|
|
|
|
rn = CSKY_16_ST_VAL_REGNUM (insn);
|
|
disp = CSKY_16_ST_OFFSET (insn);
|
|
register_offsets[rn] = stacksize - disp;
|
|
if (csky_debug)
|
|
print_savedreg_msg (rn, register_offsets, true);
|
|
continue;
|
|
}
|
|
else if (CSKY_16_IS_MOV_FP_SP (insn))
|
|
{
|
|
/* SP is saved to FP reg, means prologue may modify SP. */
|
|
is_fp_saved = 1;
|
|
adjust_fp = stacksize;
|
|
continue;
|
|
}
|
|
else if (CSKY_16_IS_PUSH (insn))
|
|
{
|
|
/* Push for 16_bit. */
|
|
int offset = 0;
|
|
if (CSKY_16_IS_PUSH_R15 (insn))
|
|
{
|
|
stacksize += 4;
|
|
register_offsets[15] = stacksize;
|
|
if (csky_debug)
|
|
print_savedreg_msg (15, register_offsets, false);
|
|
offset += 4;
|
|
}
|
|
if (CSKY_16_PUSH_LIST1 (insn))
|
|
{
|
|
int num = CSKY_16_PUSH_LIST1 (insn);
|
|
int tmp = 0;
|
|
stacksize += num * 4;
|
|
offset += num * 4;
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: push regs_array: r4-r%d\n",
|
|
4 + num - 1);
|
|
}
|
|
for (rn = 4; rn <= 4 + num - 1; rn++)
|
|
{
|
|
register_offsets[rn] = stacksize - tmp;
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: r%d saved at 0x%x"
|
|
" (offset %d)\n", rn,
|
|
register_offsets[rn], offset);
|
|
}
|
|
tmp += 4;
|
|
}
|
|
}
|
|
|
|
framesize = stacksize;
|
|
if (csky_debug)
|
|
fprintf_unfiltered (gdb_stdlog, "csky: continuing\n");
|
|
continue;
|
|
}
|
|
else if (CSKY_16_IS_LRW4 (insn) || CSKY_16_IS_MOVI4 (insn))
|
|
{
|
|
int adjust = 0;
|
|
unsigned int insn2;
|
|
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: looking at large frame\n");
|
|
}
|
|
if (CSKY_16_IS_LRW4 (insn))
|
|
{
|
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
|
int offset = ((insn & 0x300) >> 3) | (insn & 0x1f);
|
|
int literal_addr = (addr + ( offset << 2)) & 0xfffffffc;
|
|
adjust = read_memory_unsigned_integer (literal_addr, 4,
|
|
byte_order);
|
|
}
|
|
else
|
|
{
|
|
/* CSKY_16_IS_MOVI4 (insn). */
|
|
adjust = (insn & 0xff);
|
|
}
|
|
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: base stacksize=0x%x\n", adjust);
|
|
}
|
|
|
|
/* May have zero or more instructions which modify r4. */
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: looking for r4 adjusters...\n");
|
|
}
|
|
int offset = 2;
|
|
insn_len = csky_get_insn (gdbarch, addr + offset, &insn2);
|
|
while (CSKY_IS_R4_ADJUSTER (insn2))
|
|
{
|
|
if (CSKY_32_IS_ADDI4 (insn2))
|
|
{
|
|
int imm = (insn2 & 0xfff) + 1;
|
|
adjust += imm;
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: addi r4,%d\n", imm);
|
|
}
|
|
}
|
|
else if (CSKY_32_IS_SUBI4 (insn2))
|
|
{
|
|
int imm = (insn2 & 0xfff) + 1;
|
|
adjust -= imm;
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: subi r4,%d\n", imm);
|
|
}
|
|
}
|
|
else if (CSKY_32_IS_NOR4 (insn2))
|
|
{
|
|
adjust = ~adjust;
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: nor r4,r4,r4\n");
|
|
}
|
|
}
|
|
else if (CSKY_32_IS_ROTLI4 (insn2))
|
|
{
|
|
int imm = ((insn2 >> 21) & 0x1f);
|
|
int temp = adjust >> (32 - imm);
|
|
adjust <<= imm;
|
|
adjust |= temp;
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: rotli r4,r4,%d\n", imm);
|
|
}
|
|
}
|
|
else if (CSKY_32_IS_LISI4 (insn2))
|
|
{
|
|
int imm = ((insn2 >> 21) & 0x1f);
|
|
adjust <<= imm;
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: lsli r4,r4,%d\n", imm);
|
|
}
|
|
}
|
|
else if (CSKY_32_IS_BSETI4 (insn2))
|
|
{
|
|
int imm = ((insn2 >> 21) & 0x1f);
|
|
adjust |= (1 << imm);
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: bseti r4,r4 %d\n", imm);
|
|
}
|
|
}
|
|
else if (CSKY_32_IS_BCLRI4 (insn2))
|
|
{
|
|
int imm = ((insn2 >> 21) & 0x1f);
|
|
adjust &= ~(1 << imm);
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: bclri r4,r4 %d\n", imm);
|
|
}
|
|
}
|
|
else if (CSKY_32_IS_IXH4 (insn2))
|
|
{
|
|
adjust *= 3;
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: ixh r4,r4,r4\n");
|
|
}
|
|
}
|
|
else if (CSKY_32_IS_IXW4 (insn2))
|
|
{
|
|
adjust *= 5;
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: ixw r4,r4,r4\n");
|
|
}
|
|
}
|
|
else if (CSKY_16_IS_ADDI4 (insn2))
|
|
{
|
|
int imm = (insn2 & 0xff) + 1;
|
|
adjust += imm;
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: addi r4,%d\n", imm);
|
|
}
|
|
}
|
|
else if (CSKY_16_IS_SUBI4 (insn2))
|
|
{
|
|
int imm = (insn2 & 0xff) + 1;
|
|
adjust -= imm;
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: subi r4,%d\n", imm);
|
|
}
|
|
}
|
|
else if (CSKY_16_IS_NOR4 (insn2))
|
|
{
|
|
adjust = ~adjust;
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: nor r4,r4\n");
|
|
}
|
|
}
|
|
else if (CSKY_16_IS_BSETI4 (insn2))
|
|
{
|
|
int imm = (insn2 & 0x1f);
|
|
adjust |= (1 << imm);
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: bseti r4, %d\n", imm);
|
|
}
|
|
}
|
|
else if (CSKY_16_IS_BCLRI4 (insn2))
|
|
{
|
|
int imm = (insn2 & 0x1f);
|
|
adjust &= ~(1 << imm);
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: bclri r4, %d\n", imm);
|
|
}
|
|
}
|
|
else if (CSKY_16_IS_LSLI4 (insn2))
|
|
{
|
|
int imm = (insn2 & 0x1f);
|
|
adjust <<= imm;
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
|
"csky: lsli r4,r4, %d\n", imm);
|
|
}
|
|
}
|
|
|
|
offset += insn_len;
|
|
insn_len = csky_get_insn (gdbarch, addr + offset, &insn2);
|
|
};
|
|
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog, "csky: "
|
|
"done looking for r4 adjusters\n");
|
|
}
|
|
|
|
/* If the next instruction adjusts the stack pointer, we keep
|
|
everything; if not, we scrap it and we've found the end
|
|
of the prologue. */
|
|
if (CSKY_IS_SUBU4 (insn2))
|
|
{
|
|
addr += offset;
|
|
stacksize += adjust;
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog, "csky: "
|
|
"found stack adjustment of 0x%x"
|
|
" bytes.\n", adjust);
|
|
fprintf_unfiltered (gdb_stdlog, "csky: "
|
|
"skipping to new address %s\n",
|
|
core_addr_to_string_nz (addr));
|
|
fprintf_unfiltered (gdb_stdlog, "csky: continuing\n");
|
|
}
|
|
continue;
|
|
}
|
|
|
|
/* None of these instructions are prologue, so don't touch
|
|
anything. */
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog, "csky: no subu sp,r4; "
|
|
"NOT altering stacksize.\n");
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* This is not a prologue instruction, so stop here. */
|
|
if (csky_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog, "csky: insn is not a prologue"
|
|
" insn -- ending scan\n");
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (this_cache)
|
|
{
|
|
CORE_ADDR unwound_fp;
|
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
|
this_cache->framesize = framesize;
|
|
|
|
if (is_fp_saved)
|
|
{
|
|
this_cache->framereg = CSKY_FP_REGNUM;
|
|
unwound_fp = get_frame_register_unsigned (this_frame,
|
|
this_cache->framereg);
|
|
this_cache->prev_sp = unwound_fp + adjust_fp;
|
|
}
|
|
else
|
|
{
|
|
this_cache->framereg = CSKY_SP_REGNUM;
|
|
unwound_fp = get_frame_register_unsigned (this_frame,
|
|
this_cache->framereg);
|
|
this_cache->prev_sp = unwound_fp + stacksize;
|
|
}
|
|
|
|
/* Note where saved registers are stored. The offsets in
|
|
REGISTER_OFFSETS are computed relative to the top of the frame. */
|
|
for (rn = 0; rn < CSKY_NUM_GREGS; rn++)
|
|
{
|
|
if (register_offsets[rn] >= 0)
|
|
{
|
|
this_cache->saved_regs[rn].addr
|
|
= this_cache->prev_sp - register_offsets[rn];
|
|
if (csky_debug)
|
|
{
|
|
CORE_ADDR rn_value = read_memory_unsigned_integer (
|
|
this_cache->saved_regs[rn].addr, 4, byte_order);
|
|
fprintf_unfiltered (gdb_stdlog, "Saved register %s "
|
|
"stored at 0x%08lx, value=0x%08lx\n",
|
|
csky_register_names[rn],
|
|
(unsigned long)
|
|
this_cache->saved_regs[rn].addr,
|
|
(unsigned long) rn_value);
|
|
}
|
|
}
|
|
}
|
|
if (lr_type == LR_TYPE_EPC)
|
|
{
|
|
/* rte || epc . */
|
|
this_cache->saved_regs[CSKY_PC_REGNUM]
|
|
= this_cache->saved_regs[CSKY_EPC_REGNUM];
|
|
}
|
|
else if (lr_type == LR_TYPE_FPC)
|
|
{
|
|
/* rfi || fpc . */
|
|
this_cache->saved_regs[CSKY_PC_REGNUM]
|
|
= this_cache->saved_regs[CSKY_FPC_REGNUM];
|
|
}
|
|
else
|
|
{
|
|
this_cache->saved_regs[CSKY_PC_REGNUM]
|
|
= this_cache->saved_regs[CSKY_LR_REGNUM];
|
|
}
|
|
}
|
|
|
|
return addr;
|
|
}
|
|
|
|
/* Detect whether PC is at a point where the stack frame has been
|
|
destroyed. */
|
|
|
|
static int
|
|
csky_stack_frame_destroyed_p (struct gdbarch *gdbarch, CORE_ADDR pc)
|
|
{
|
|
unsigned int insn;
|
|
CORE_ADDR addr;
|
|
CORE_ADDR func_start, func_end;
|
|
|
|
if (!find_pc_partial_function (pc, NULL, &func_start, &func_end))
|
|
return 0;
|
|
|
|
bool fp_saved = false;
|
|
int insn_len;
|
|
for (addr = func_start; addr < func_end; addr += insn_len)
|
|
{
|
|
/* Get next insn. */
|
|
insn_len = csky_get_insn (gdbarch, addr, &insn);
|
|
|
|
if (insn_len == 2)
|
|
{
|
|
/* Is sp is saved to fp. */
|
|
if (CSKY_16_IS_MOV_FP_SP (insn))
|
|
fp_saved = true;
|
|
/* If sp was saved to fp and now being restored from
|
|
fp then it indicates the start of epilog. */
|
|
else if (fp_saved && CSKY_16_IS_MOV_SP_FP (insn))
|
|
return pc >= addr;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* Implement the skip_prologue gdbarch hook. */
|
|
|
|
static CORE_ADDR
|
|
csky_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
|
|
{
|
|
CORE_ADDR func_addr, func_end;
|
|
struct symtab_and_line sal;
|
|
const int default_search_limit = 128;
|
|
|
|
/* See if we can find the end of the prologue using the symbol table. */
|
|
if (find_pc_partial_function (pc, NULL, &func_addr, &func_end))
|
|
{
|
|
CORE_ADDR post_prologue_pc
|
|
= skip_prologue_using_sal (gdbarch, func_addr);
|
|
|
|
if (post_prologue_pc != 0)
|
|
return std::max (pc, post_prologue_pc);
|
|
}
|
|
else
|
|
func_end = pc + default_search_limit;
|
|
|
|
/* Find the end of prologue. Default lr_type. */
|
|
return csky_analyze_prologue (gdbarch, pc, func_end, func_end,
|
|
NULL, NULL, LR_TYPE_R15);
|
|
}
|
|
|
|
/* Implement the breakpoint_kind_from_pc gdbarch method. */
|
|
|
|
static int
|
|
csky_breakpoint_kind_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr)
|
|
{
|
|
if (csky_pc_is_csky16 (gdbarch, *pcptr))
|
|
return CSKY_INSN_SIZE16;
|
|
else
|
|
return CSKY_INSN_SIZE32;
|
|
}
|
|
|
|
/* Implement the sw_breakpoint_from_kind gdbarch method. */
|
|
|
|
static const gdb_byte *
|
|
csky_sw_breakpoint_from_kind (struct gdbarch *gdbarch, int kind, int *size)
|
|
{
|
|
*size = kind;
|
|
if (kind == CSKY_INSN_SIZE16)
|
|
{
|
|
static gdb_byte csky_16_breakpoint[] = { 0, 0 };
|
|
return csky_16_breakpoint;
|
|
}
|
|
else
|
|
{
|
|
static gdb_byte csky_32_breakpoint[] = { 0, 0, 0, 0 };
|
|
return csky_32_breakpoint;
|
|
}
|
|
}
|
|
|
|
/* Implement the memory_insert_breakpoint gdbarch method. */
|
|
|
|
static int
|
|
csky_memory_insert_breakpoint (struct gdbarch *gdbarch,
|
|
struct bp_target_info *bp_tgt)
|
|
{
|
|
int val;
|
|
const unsigned char *bp;
|
|
gdb_byte bp_write_record1[] = { 0, 0, 0, 0 };
|
|
gdb_byte bp_write_record2[] = { 0, 0, 0, 0 };
|
|
gdb_byte bp_record[] = { 0, 0, 0, 0 };
|
|
|
|
/* Sanity-check bp_address. */
|
|
if (bp_tgt->reqstd_address % 2)
|
|
warning (_("Invalid breakpoint address 0x%x is an odd number."),
|
|
(unsigned int) bp_tgt->reqstd_address);
|
|
scoped_restore restore_memory
|
|
= make_scoped_restore_show_memory_breakpoints (1);
|
|
|
|
/* Determine appropriate breakpoint_kind for this address. */
|
|
bp_tgt->kind = csky_breakpoint_kind_from_pc (gdbarch,
|
|
&bp_tgt->reqstd_address);
|
|
|
|
/* Save the memory contents. */
|
|
bp_tgt->shadow_len = bp_tgt->kind;
|
|
|
|
/* Fill bp_tgt->placed_address. */
|
|
bp_tgt->placed_address = bp_tgt->reqstd_address;
|
|
|
|
if (bp_tgt->kind == CSKY_INSN_SIZE16)
|
|
{
|
|
if ((bp_tgt->reqstd_address % 4) == 0)
|
|
{
|
|
/* Read two bytes. */
|
|
val = target_read_memory (bp_tgt->reqstd_address,
|
|
bp_tgt->shadow_contents, 2);
|
|
if (val)
|
|
return val;
|
|
|
|
/* Read two bytes. */
|
|
val = target_read_memory (bp_tgt->reqstd_address + 2,
|
|
bp_record, 2);
|
|
if (val)
|
|
return val;
|
|
|
|
/* Write the breakpoint. */
|
|
bp_write_record1[2] = bp_record[0];
|
|
bp_write_record1[3] = bp_record[1];
|
|
bp = bp_write_record1;
|
|
val = target_write_raw_memory (bp_tgt->reqstd_address, bp,
|
|
CSKY_WR_BKPT_MODE);
|
|
}
|
|
else
|
|
{
|
|
val = target_read_memory (bp_tgt->reqstd_address,
|
|
bp_tgt->shadow_contents, 2);
|
|
if (val)
|
|
return val;
|
|
|
|
val = target_read_memory (bp_tgt->reqstd_address - 2,
|
|
bp_record, 2);
|
|
if (val)
|
|
return val;
|
|
|
|
/* Write the breakpoint. */
|
|
bp_write_record1[0] = bp_record[0];
|
|
bp_write_record1[1] = bp_record[1];
|
|
bp = bp_write_record1;
|
|
val = target_write_raw_memory (bp_tgt->reqstd_address - 2,
|
|
bp, CSKY_WR_BKPT_MODE);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (bp_tgt->placed_address % 4 == 0)
|
|
{
|
|
val = target_read_memory (bp_tgt->reqstd_address,
|
|
bp_tgt->shadow_contents,
|
|
CSKY_WR_BKPT_MODE);
|
|
if (val)
|
|
return val;
|
|
|
|
/* Write the breakpoint. */
|
|
bp = bp_write_record1;
|
|
val = target_write_raw_memory (bp_tgt->reqstd_address,
|
|
bp, CSKY_WR_BKPT_MODE);
|
|
}
|
|
else
|
|
{
|
|
val = target_read_memory (bp_tgt->reqstd_address,
|
|
bp_tgt->shadow_contents,
|
|
CSKY_WR_BKPT_MODE);
|
|
if (val)
|
|
return val;
|
|
|
|
val = target_read_memory (bp_tgt->reqstd_address - 2,
|
|
bp_record, 2);
|
|
if (val)
|
|
return val;
|
|
|
|
val = target_read_memory (bp_tgt->reqstd_address + 4,
|
|
bp_record + 2, 2);
|
|
if (val)
|
|
return val;
|
|
|
|
bp_write_record1[0] = bp_record[0];
|
|
bp_write_record1[1] = bp_record[1];
|
|
bp_write_record2[2] = bp_record[2];
|
|
bp_write_record2[3] = bp_record[3];
|
|
|
|
/* Write the breakpoint. */
|
|
bp = bp_write_record1;
|
|
val = target_write_raw_memory (bp_tgt->reqstd_address - 2, bp,
|
|
CSKY_WR_BKPT_MODE);
|
|
if (val)
|
|
return val;
|
|
|
|
/* Write the breakpoint. */
|
|
bp = bp_write_record2;
|
|
val = target_write_raw_memory (bp_tgt->reqstd_address + 2, bp,
|
|
CSKY_WR_BKPT_MODE);
|
|
}
|
|
}
|
|
return val;
|
|
}
|
|
|
|
/* Restore the breakpoint shadow_contents to the target. */
|
|
|
|
static int
|
|
csky_memory_remove_breakpoint (struct gdbarch *gdbarch,
|
|
struct bp_target_info *bp_tgt)
|
|
{
|
|
int val;
|
|
gdb_byte bp_record[] = { 0, 0, 0, 0, 0, 0, 0, 0 };
|
|
/* Different for shadow_len 2 or 4. */
|
|
if (bp_tgt->shadow_len == 2)
|
|
{
|
|
/* Do word-sized writes on word-aligned boundaries and read
|
|
padding bytes as necessary. */
|
|
if (bp_tgt->reqstd_address % 4 == 0)
|
|
{
|
|
val = target_read_memory (bp_tgt->reqstd_address + 2,
|
|
bp_record + 2, 2);
|
|
if (val)
|
|
return val;
|
|
bp_record[0] = bp_tgt->shadow_contents[0];
|
|
bp_record[1] = bp_tgt->shadow_contents[1];
|
|
return target_write_raw_memory (bp_tgt->reqstd_address,
|
|
bp_record, CSKY_WR_BKPT_MODE);
|
|
}
|
|
else
|
|
{
|
|
val = target_read_memory (bp_tgt->reqstd_address - 2,
|
|
bp_record, 2);
|
|
if (val)
|
|
return val;
|
|
bp_record[2] = bp_tgt->shadow_contents[0];
|
|
bp_record[3] = bp_tgt->shadow_contents[1];
|
|
return target_write_raw_memory (bp_tgt->reqstd_address - 2,
|
|
bp_record, CSKY_WR_BKPT_MODE);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Do word-sized writes on word-aligned boundaries and read
|
|
padding bytes as necessary. */
|
|
if (bp_tgt->placed_address % 4 == 0)
|
|
{
|
|
return target_write_raw_memory (bp_tgt->reqstd_address,
|
|
bp_tgt->shadow_contents,
|
|
CSKY_WR_BKPT_MODE);
|
|
}
|
|
else
|
|
{
|
|
val = target_read_memory (bp_tgt->reqstd_address - 2,
|
|
bp_record, 2);
|
|
if (val)
|
|
return val;
|
|
val = target_read_memory (bp_tgt->reqstd_address + 4,
|
|
bp_record+6, 2);
|
|
if (val)
|
|
return val;
|
|
|
|
bp_record[2] = bp_tgt->shadow_contents[0];
|
|
bp_record[3] = bp_tgt->shadow_contents[1];
|
|
bp_record[4] = bp_tgt->shadow_contents[2];
|
|
bp_record[5] = bp_tgt->shadow_contents[3];
|
|
|
|
return target_write_raw_memory (bp_tgt->reqstd_address - 2,
|
|
bp_record,
|
|
CSKY_WR_BKPT_MODE * 2);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Determine link register type. */
|
|
|
|
static lr_type_t
|
|
csky_analyze_lr_type (struct gdbarch *gdbarch,
|
|
CORE_ADDR start_pc, CORE_ADDR end_pc)
|
|
{
|
|
CORE_ADDR addr;
|
|
unsigned int insn, insn_len;
|
|
insn_len = 2;
|
|
|
|
for (addr = start_pc; addr < end_pc; addr += insn_len)
|
|
{
|
|
insn_len = csky_get_insn (gdbarch, addr, &insn);
|
|
if (insn_len == 4)
|
|
{
|
|
if (CSKY_32_IS_MFCR_EPSR (insn) || CSKY_32_IS_MFCR_EPC (insn)
|
|
|| CSKY_32_IS_RTE (insn))
|
|
return LR_TYPE_EPC;
|
|
}
|
|
else if (CSKY_32_IS_MFCR_FPSR (insn) || CSKY_32_IS_MFCR_FPC (insn)
|
|
|| CSKY_32_IS_RFI (insn))
|
|
return LR_TYPE_FPC;
|
|
else if (CSKY_32_IS_JMP (insn) || CSKY_32_IS_BR (insn)
|
|
|| CSKY_32_IS_JMPIX (insn) || CSKY_32_IS_JMPI (insn))
|
|
return LR_TYPE_R15;
|
|
else
|
|
{
|
|
/* 16 bit instruction. */
|
|
if (CSKY_16_IS_JMP (insn) || CSKY_16_IS_BR (insn)
|
|
|| CSKY_16_IS_JMPIX (insn))
|
|
return LR_TYPE_R15;
|
|
}
|
|
}
|
|
return LR_TYPE_R15;
|
|
}
|
|
|
|
/* Heuristic unwinder. */
|
|
|
|
static struct csky_unwind_cache *
|
|
csky_frame_unwind_cache (struct frame_info *this_frame)
|
|
{
|
|
CORE_ADDR prologue_start, prologue_end, func_end, prev_pc, block_addr;
|
|
struct csky_unwind_cache *cache;
|
|
const struct block *bl;
|
|
unsigned long func_size = 0;
|
|
struct gdbarch *gdbarch = get_frame_arch (this_frame);
|
|
unsigned int sp_regnum = CSKY_SP_REGNUM;
|
|
|
|
/* Default lr type is r15. */
|
|
lr_type_t lr_type = LR_TYPE_R15;
|
|
|
|
cache = FRAME_OBSTACK_ZALLOC (struct csky_unwind_cache);
|
|
cache->saved_regs = trad_frame_alloc_saved_regs (this_frame);
|
|
|
|
/* Assume there is no frame until proven otherwise. */
|
|
cache->framereg = sp_regnum;
|
|
|
|
cache->framesize = 0;
|
|
|
|
prev_pc = get_frame_pc (this_frame);
|
|
block_addr = get_frame_address_in_block (this_frame);
|
|
if (find_pc_partial_function (block_addr, NULL, &prologue_start,
|
|
&func_end) == 0)
|
|
/* We couldn't find a function containing block_addr, so bail out
|
|
and hope for the best. */
|
|
return cache;
|
|
|
|
/* Get the (function) symbol matching prologue_start. */
|
|
bl = block_for_pc (prologue_start);
|
|
if (bl != NULL)
|
|
func_size = bl->endaddr - bl->startaddr;
|
|
else
|
|
{
|
|
struct bound_minimal_symbol msymbol
|
|
= lookup_minimal_symbol_by_pc (prologue_start);
|
|
if (msymbol.minsym != NULL)
|
|
func_size = MSYMBOL_SIZE (msymbol.minsym);
|
|
}
|
|
|
|
/* If FUNC_SIZE is 0 we may have a special-case use of lr
|
|
e.g. exception or interrupt. */
|
|
if (func_size == 0)
|
|
lr_type = csky_analyze_lr_type (gdbarch, prologue_start, func_end);
|
|
|
|
prologue_end = std::min (func_end, prev_pc);
|
|
|
|
/* Analyze the function prologue. */
|
|
csky_analyze_prologue (gdbarch, prologue_start, prologue_end,
|
|
func_end, this_frame, cache, lr_type);
|
|
|
|
/* gdbarch_sp_regnum contains the value and not the address. */
|
|
trad_frame_set_value (cache->saved_regs, sp_regnum, cache->prev_sp);
|
|
return cache;
|
|
}
|
|
|
|
/* Implement the unwind_pc gdbarch method. */
|
|
|
|
static CORE_ADDR
|
|
csky_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
|
|
{
|
|
return frame_unwind_register_unsigned (next_frame, CSKY_PC_REGNUM);
|
|
}
|
|
|
|
/* Implement the this_id function for the normal unwinder. */
|
|
|
|
static void
|
|
csky_frame_this_id (struct frame_info *this_frame,
|
|
void **this_prologue_cache, struct frame_id *this_id)
|
|
{
|
|
struct csky_unwind_cache *cache;
|
|
struct frame_id id;
|
|
|
|
if (*this_prologue_cache == NULL)
|
|
*this_prologue_cache = csky_frame_unwind_cache (this_frame);
|
|
cache = (struct csky_unwind_cache *) *this_prologue_cache;
|
|
|
|
/* This marks the outermost frame. */
|
|
if (cache->prev_sp == 0)
|
|
return;
|
|
|
|
id = frame_id_build (cache->prev_sp, get_frame_func (this_frame));
|
|
*this_id = id;
|
|
}
|
|
|
|
/* Implement the prev_register function for the normal unwinder. */
|
|
|
|
static struct value *
|
|
csky_frame_prev_register (struct frame_info *this_frame,
|
|
void **this_prologue_cache, int regnum)
|
|
{
|
|
struct csky_unwind_cache *cache;
|
|
|
|
if (*this_prologue_cache == NULL)
|
|
*this_prologue_cache = csky_frame_unwind_cache (this_frame);
|
|
cache = (struct csky_unwind_cache *) *this_prologue_cache;
|
|
|
|
return trad_frame_get_prev_register (this_frame, cache->saved_regs,
|
|
regnum);
|
|
}
|
|
|
|
/* Data structures for the normal prologue-analysis-based
|
|
unwinder. */
|
|
|
|
static const struct frame_unwind csky_unwind_cache = {
|
|
NORMAL_FRAME,
|
|
default_frame_unwind_stop_reason,
|
|
csky_frame_this_id,
|
|
csky_frame_prev_register,
|
|
NULL,
|
|
default_frame_sniffer,
|
|
NULL,
|
|
NULL
|
|
};
|
|
|
|
|
|
|
|
static int
|
|
csky_stub_unwind_sniffer (const struct frame_unwind *self,
|
|
struct frame_info *this_frame,
|
|
void **this_prologue_cache)
|
|
{
|
|
CORE_ADDR addr_in_block;
|
|
|
|
addr_in_block = get_frame_address_in_block (this_frame);
|
|
|
|
if (find_pc_partial_function (addr_in_block, NULL, NULL, NULL) == 0
|
|
|| in_plt_section (addr_in_block))
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct csky_unwind_cache *
|
|
csky_make_stub_cache (struct frame_info *this_frame)
|
|
{
|
|
struct csky_unwind_cache *cache;
|
|
|
|
cache = FRAME_OBSTACK_ZALLOC (struct csky_unwind_cache);
|
|
cache->saved_regs = trad_frame_alloc_saved_regs (this_frame);
|
|
cache->prev_sp = get_frame_register_unsigned (this_frame, CSKY_SP_REGNUM);
|
|
|
|
return cache;
|
|
}
|
|
|
|
static void
|
|
csky_stub_this_id (struct frame_info *this_frame,
|
|
void **this_cache,
|
|
struct frame_id *this_id)
|
|
{
|
|
struct csky_unwind_cache *cache;
|
|
|
|
if (*this_cache == NULL)
|
|
*this_cache = csky_make_stub_cache (this_frame);
|
|
cache = (struct csky_unwind_cache *) *this_cache;
|
|
|
|
/* Our frame ID for a stub frame is the current SP and LR. */
|
|
*this_id = frame_id_build (cache->prev_sp, get_frame_pc (this_frame));
|
|
}
|
|
|
|
static struct value *
|
|
csky_stub_prev_register (struct frame_info *this_frame,
|
|
void **this_cache,
|
|
int prev_regnum)
|
|
{
|
|
struct csky_unwind_cache *cache;
|
|
|
|
if (*this_cache == NULL)
|
|
*this_cache = csky_make_stub_cache (this_frame);
|
|
cache = (struct csky_unwind_cache *) *this_cache;
|
|
|
|
/* If we are asked to unwind the PC, then return the LR. */
|
|
if (prev_regnum == CSKY_PC_REGNUM)
|
|
{
|
|
CORE_ADDR lr;
|
|
|
|
lr = frame_unwind_register_unsigned (this_frame, CSKY_LR_REGNUM);
|
|
return frame_unwind_got_constant (this_frame, prev_regnum, lr);
|
|
}
|
|
|
|
if (prev_regnum == CSKY_SP_REGNUM)
|
|
return frame_unwind_got_constant (this_frame, prev_regnum, cache->prev_sp);
|
|
|
|
return trad_frame_get_prev_register (this_frame, cache->saved_regs,
|
|
prev_regnum);
|
|
}
|
|
|
|
struct frame_unwind csky_stub_unwind = {
|
|
NORMAL_FRAME,
|
|
default_frame_unwind_stop_reason,
|
|
csky_stub_this_id,
|
|
csky_stub_prev_register,
|
|
NULL,
|
|
csky_stub_unwind_sniffer
|
|
};
|
|
|
|
/* Implement the this_base, this_locals, and this_args hooks
|
|
for the normal unwinder. */
|
|
|
|
static CORE_ADDR
|
|
csky_frame_base_address (struct frame_info *this_frame, void **this_cache)
|
|
{
|
|
struct csky_unwind_cache *cache;
|
|
|
|
if (*this_cache == NULL)
|
|
*this_cache = csky_frame_unwind_cache (this_frame);
|
|
cache = (struct csky_unwind_cache *) *this_cache;
|
|
|
|
return cache->prev_sp - cache->framesize;
|
|
}
|
|
|
|
static const struct frame_base csky_frame_base = {
|
|
&csky_unwind_cache,
|
|
csky_frame_base_address,
|
|
csky_frame_base_address,
|
|
csky_frame_base_address
|
|
};
|
|
|
|
/* Implement the dummy_id gdbarch method. The frame ID's base
|
|
needs to match the TOS value saved by save_dummy_frame_tos,
|
|
and the PC should match the dummy frame's breakpoint. */
|
|
|
|
static struct frame_id
|
|
csky_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame)
|
|
{
|
|
unsigned int sp_regnum = CSKY_SP_REGNUM;
|
|
|
|
CORE_ADDR sp = get_frame_register_unsigned (this_frame, sp_regnum);
|
|
return frame_id_build (sp, get_frame_pc (this_frame));
|
|
}
|
|
|
|
/* Initialize register access method. */
|
|
|
|
static void
|
|
csky_dwarf2_frame_init_reg (struct gdbarch *gdbarch, int regnum,
|
|
struct dwarf2_frame_state_reg *reg,
|
|
struct frame_info *this_frame)
|
|
{
|
|
if (regnum == gdbarch_pc_regnum (gdbarch))
|
|
reg->how = DWARF2_FRAME_REG_RA;
|
|
else if (regnum == gdbarch_sp_regnum (gdbarch))
|
|
reg->how = DWARF2_FRAME_REG_CFA;
|
|
}
|
|
|
|
/* Create csky register groups. */
|
|
|
|
static void
|
|
csky_init_reggroup ()
|
|
{
|
|
cr_reggroup = reggroup_new ("cr", USER_REGGROUP);
|
|
fr_reggroup = reggroup_new ("fr", USER_REGGROUP);
|
|
vr_reggroup = reggroup_new ("vr", USER_REGGROUP);
|
|
mmu_reggroup = reggroup_new ("mmu", USER_REGGROUP);
|
|
prof_reggroup = reggroup_new ("profiling", USER_REGGROUP);
|
|
}
|
|
|
|
/* Add register groups into reggroup list. */
|
|
|
|
static void
|
|
csky_add_reggroups (struct gdbarch *gdbarch)
|
|
{
|
|
reggroup_add (gdbarch, all_reggroup);
|
|
reggroup_add (gdbarch, general_reggroup);
|
|
reggroup_add (gdbarch, cr_reggroup);
|
|
reggroup_add (gdbarch, fr_reggroup);
|
|
reggroup_add (gdbarch, vr_reggroup);
|
|
reggroup_add (gdbarch, mmu_reggroup);
|
|
reggroup_add (gdbarch, prof_reggroup);
|
|
}
|
|
|
|
/* Return the groups that a CSKY register can be categorised into. */
|
|
|
|
static int
|
|
csky_register_reggroup_p (struct gdbarch *gdbarch, int regnum,
|
|
struct reggroup *reggroup)
|
|
{
|
|
int raw_p;
|
|
|
|
if (gdbarch_register_name (gdbarch, regnum) == NULL
|
|
|| gdbarch_register_name (gdbarch, regnum)[0] == '\0')
|
|
return 0;
|
|
|
|
if (reggroup == all_reggroup)
|
|
return 1;
|
|
|
|
raw_p = regnum < gdbarch_num_regs (gdbarch);
|
|
if (reggroup == save_reggroup || reggroup == restore_reggroup)
|
|
return raw_p;
|
|
|
|
if (((regnum >= CSKY_R0_REGNUM) && (regnum <= CSKY_R0_REGNUM + 31))
|
|
&& (reggroup == general_reggroup))
|
|
return 1;
|
|
|
|
if (((regnum == CSKY_PC_REGNUM)
|
|
|| ((regnum >= CSKY_CR0_REGNUM)
|
|
&& (regnum <= CSKY_CR0_REGNUM + 30)))
|
|
&& (reggroup == cr_reggroup))
|
|
return 2;
|
|
|
|
if ((((regnum >= CSKY_VR0_REGNUM) && (regnum <= CSKY_VR0_REGNUM + 15))
|
|
|| ((regnum >= CSKY_VCR0_REGNUM)
|
|
&& (regnum <= CSKY_VCR0_REGNUM + 2)))
|
|
&& (reggroup == vr_reggroup))
|
|
return 3;
|
|
|
|
if (((regnum >= CSKY_MMU_REGNUM) && (regnum <= CSKY_MMU_REGNUM + 8))
|
|
&& (reggroup == mmu_reggroup))
|
|
return 4;
|
|
|
|
if (((regnum >= CSKY_PROFCR_REGNUM)
|
|
&& (regnum <= CSKY_PROFCR_REGNUM + 48))
|
|
&& (reggroup == prof_reggroup))
|
|
return 5;
|
|
|
|
if ((((regnum >= CSKY_FR0_REGNUM) && (regnum <= CSKY_FR0_REGNUM + 15))
|
|
|| ((regnum >= CSKY_VCR0_REGNUM) && (regnum <= CSKY_VCR0_REGNUM + 2)))
|
|
&& (reggroup == fr_reggroup))
|
|
return 6;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Implement the dwarf2_reg_to_regnum gdbarch method. */
|
|
|
|
static int
|
|
csky_dwarf_reg_to_regnum (struct gdbarch *gdbarch, int dw_reg)
|
|
{
|
|
if (dw_reg < 0 || dw_reg >= CSKY_NUM_REGS)
|
|
return -1;
|
|
return dw_reg;
|
|
}
|
|
|
|
/* Override interface for command: info register. */
|
|
|
|
static void
|
|
csky_print_registers_info (struct gdbarch *gdbarch, struct ui_file *file,
|
|
struct frame_info *frame, int regnum, int all)
|
|
{
|
|
/* Call default print_registers_info function. */
|
|
default_print_registers_info (gdbarch, file, frame, regnum, all);
|
|
|
|
/* For command: info register. */
|
|
if (regnum == -1 && all == 0)
|
|
{
|
|
default_print_registers_info (gdbarch, file, frame,
|
|
CSKY_PC_REGNUM, 0);
|
|
default_print_registers_info (gdbarch, file, frame,
|
|
CSKY_EPC_REGNUM, 0);
|
|
default_print_registers_info (gdbarch, file, frame,
|
|
CSKY_CR0_REGNUM, 0);
|
|
default_print_registers_info (gdbarch, file, frame,
|
|
CSKY_EPSR_REGNUM, 0);
|
|
}
|
|
return;
|
|
}
|
|
|
|
/* Initialize the current architecture based on INFO. If possible,
|
|
re-use an architecture from ARCHES, which is a list of
|
|
architectures already created during this debugging session.
|
|
|
|
Called at program startup, when reading a core file, and when
|
|
reading a binary file. */
|
|
|
|
static struct gdbarch *
|
|
csky_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
|
|
{
|
|
struct gdbarch *gdbarch;
|
|
struct gdbarch_tdep *tdep;
|
|
|
|
/* Find a candidate among the list of pre-declared architectures. */
|
|
arches = gdbarch_list_lookup_by_info (arches, &info);
|
|
if (arches != NULL)
|
|
return arches->gdbarch;
|
|
|
|
/* None found, create a new architecture from the information
|
|
provided. */
|
|
tdep = XCNEW (struct gdbarch_tdep);
|
|
gdbarch = gdbarch_alloc (&info, tdep);
|
|
|
|
/* Target data types. */
|
|
set_gdbarch_ptr_bit (gdbarch, 32);
|
|
set_gdbarch_addr_bit (gdbarch, 32);
|
|
set_gdbarch_short_bit (gdbarch, 16);
|
|
set_gdbarch_int_bit (gdbarch, 32);
|
|
set_gdbarch_long_bit (gdbarch, 32);
|
|
set_gdbarch_long_long_bit (gdbarch, 64);
|
|
set_gdbarch_float_bit (gdbarch, 32);
|
|
set_gdbarch_double_bit (gdbarch, 64);
|
|
set_gdbarch_float_format (gdbarch, floatformats_ieee_single);
|
|
set_gdbarch_double_format (gdbarch, floatformats_ieee_double);
|
|
|
|
/* Information about the target architecture. */
|
|
set_gdbarch_return_value (gdbarch, csky_return_value);
|
|
set_gdbarch_breakpoint_kind_from_pc (gdbarch, csky_breakpoint_kind_from_pc);
|
|
set_gdbarch_sw_breakpoint_from_kind (gdbarch, csky_sw_breakpoint_from_kind);
|
|
|
|
/* Register architecture. */
|
|
set_gdbarch_num_regs (gdbarch, CSKY_NUM_REGS);
|
|
set_gdbarch_pc_regnum (gdbarch, CSKY_PC_REGNUM);
|
|
set_gdbarch_sp_regnum (gdbarch, CSKY_SP_REGNUM);
|
|
set_gdbarch_register_name (gdbarch, csky_register_name);
|
|
set_gdbarch_register_type (gdbarch, csky_register_type);
|
|
set_gdbarch_read_pc (gdbarch, csky_read_pc);
|
|
set_gdbarch_write_pc (gdbarch, csky_write_pc);
|
|
set_gdbarch_print_registers_info (gdbarch, csky_print_registers_info);
|
|
csky_add_reggroups (gdbarch);
|
|
set_gdbarch_register_reggroup_p (gdbarch, csky_register_reggroup_p);
|
|
set_gdbarch_stab_reg_to_regnum (gdbarch, csky_dwarf_reg_to_regnum);
|
|
set_gdbarch_dwarf2_reg_to_regnum (gdbarch, csky_dwarf_reg_to_regnum);
|
|
dwarf2_frame_set_init_reg (gdbarch, csky_dwarf2_frame_init_reg);
|
|
|
|
/* Functions to analyze frames. */
|
|
frame_base_set_default (gdbarch, &csky_frame_base);
|
|
set_gdbarch_skip_prologue (gdbarch, csky_skip_prologue);
|
|
set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
|
|
set_gdbarch_frame_align (gdbarch, csky_frame_align);
|
|
set_gdbarch_stack_frame_destroyed_p (gdbarch, csky_stack_frame_destroyed_p);
|
|
|
|
/* Functions to access frame data. */
|
|
set_gdbarch_unwind_pc (gdbarch, csky_unwind_pc);
|
|
set_gdbarch_unwind_sp (gdbarch, csky_unwind_sp);
|
|
|
|
/* Functions handling dummy frames. */
|
|
set_gdbarch_push_dummy_call (gdbarch, csky_push_dummy_call);
|
|
set_gdbarch_dummy_id (gdbarch, csky_dummy_id);
|
|
|
|
/* Frame unwinders. Use DWARF debug info if available,
|
|
otherwise use our own unwinder. */
|
|
dwarf2_append_unwinders (gdbarch);
|
|
frame_unwind_append_unwinder (gdbarch, &csky_stub_unwind);
|
|
frame_unwind_append_unwinder (gdbarch, &csky_unwind_cache);
|
|
|
|
/* Breakpoints. */
|
|
set_gdbarch_memory_insert_breakpoint (gdbarch,
|
|
csky_memory_insert_breakpoint);
|
|
set_gdbarch_memory_remove_breakpoint (gdbarch,
|
|
csky_memory_remove_breakpoint);
|
|
|
|
/* Hook in ABI-specific overrides, if they have been registered. */
|
|
gdbarch_init_osabi (info, gdbarch);
|
|
|
|
/* Support simple overlay manager. */
|
|
set_gdbarch_overlay_update (gdbarch, simple_overlay_update);
|
|
set_gdbarch_char_signed (gdbarch, 0);
|
|
return gdbarch;
|
|
}
|
|
|
|
void
|
|
_initialize_csky_tdep (void)
|
|
{
|
|
|
|
register_gdbarch_init (bfd_arch_csky, csky_gdbarch_init);
|
|
|
|
csky_init_reggroup ();
|
|
|
|
/* Allow debugging this file's internals. */
|
|
add_setshow_boolean_cmd ("csky", class_maintenance, &csky_debug,
|
|
_("Set C-Sky debugging."),
|
|
_("Show C-Sky debugging."),
|
|
_("When on, C-Sky specific debugging is enabled."),
|
|
NULL,
|
|
NULL,
|
|
&setdebuglist, &showdebuglist);
|
|
}
|