--- /dev/null
+/* Target-dependent code for the CSKY architecture, for GDB.
+
+ Copyright (C) 2010-2018 Free Software Foundation, Inc.
+
+ Contributed by C-SKY Microsystems and Mentor Graphics.
+
+ This file is part of GDB.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#include "defs.h"
+#include "gdb_assert.h"
+#include "frame.h"
+#include "inferior.h"
+#include "symtab.h"
+#include "value.h"
+#include "gdbcmd.h"
+#include "language.h"
+#include "gdbcore.h"
+#include "symfile.h"
+#include "objfiles.h"
+#include "gdbtypes.h"
+#include "target.h"
+#include "arch-utils.h"
+#include "regcache.h"
+#include "osabi.h"
+#include "block.h"
+#include "reggroups.h"
+#include "elf/csky.h"
+#include "elf-bfd.h"
+#include "symcat.h"
+#include "sim-regno.h"
+#include "dis-asm.h"
+#include "frame-unwind.h"
+#include "frame-base.h"
+#include "trad-frame.h"
+#include "infcall.h"
+#include "floatformat.h"
+#include "remote.h"
+#include "target-descriptions.h"
+#include "dwarf2-frame.h"
+#include "user-regs.h"
+#include "valprint.h"
+#include "reggroups.h"
+#include "csky-tdep.h"
+#include "regset.h"
+#include "block.h"
+#include "opcode/csky.h"
+#include <algorithm>
+#include <vector>
+
+/* Control debugging information emitted in this file. */
+static int csky_debug = 0;
+
+static struct reggroup *cr_reggroup;
+static struct reggroup *fr_reggroup;
+static struct reggroup *vr_reggroup;
+static struct reggroup *mmu_reggroup;
+static struct reggroup *prof_reggroup;
+
+/* Convenience function to print debug messages in prologue analysis. */
+
+static void
+print_savedreg_msg (int regno, int offsets[], bool print_continuing)
+{
+ fprintf_unfiltered (gdb_stdlog, "csky: r%d saved at offset 0x%x\n",
+ regno, offsets[regno]);
+ if (print_continuing)
+ fprintf_unfiltered (gdb_stdlog, "csky: continuing\n");
+}
+
+/* Check whether the instruction at ADDR is 16-bit or not. */
+
+static int
+csky_pc_is_csky16 (struct gdbarch *gdbarch, CORE_ADDR addr)
+{
+ gdb_byte target_mem[2];
+ int status;
+ unsigned int insn;
+ int ret = 1;
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+
+ status = target_read_memory (addr, target_mem, 2);
+ /* Assume a 16-bit instruction if we can't read memory. */
+ if (status)
+ return 1;
+
+ /* Get instruction from memory. */
+ insn = extract_unsigned_integer (target_mem, 2, byte_order);
+ if ((insn & CSKY_32_INSN_MASK) == CSKY_32_INSN_MASK)
+ ret = 0;
+ else if (insn == CSKY_BKPT_INSN)
+ {
+ /* Check for 32-bit bkpt instruction which is all 0. */
+ status = target_read_memory (addr + 2, target_mem, 2);
+ if (status)
+ return 1;
+
+ insn = extract_unsigned_integer (target_mem, 2, byte_order);
+ if (insn == CSKY_BKPT_INSN)
+ ret = 0;
+ }
+ return ret;
+}
+
+/* Get one instruction at ADDR and store it in INSN. Return 2 for
+ a 16-bit instruction or 4 for a 32-bit instruction. */
+
+static int
+csky_get_insn (struct gdbarch *gdbarch, CORE_ADDR addr, unsigned int *insn)
+{
+ gdb_byte target_mem[2];
+ unsigned int insn_type;
+ int status;
+ int insn_len = 2;
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+
+ status = target_read_memory (addr, target_mem, 2);
+ if (status)
+ memory_error (TARGET_XFER_E_IO, addr);
+
+ insn_type = extract_unsigned_integer (target_mem, 2, byte_order);
+ if (CSKY_32_INSN_MASK == (insn_type & CSKY_32_INSN_MASK))
+ {
+ status = target_read_memory (addr + 2, target_mem, 2);
+ if (status)
+ memory_error (TARGET_XFER_E_IO, addr);
+ insn_type = ((insn_type << 16)
+ | extract_unsigned_integer (target_mem, 2, byte_order));
+ insn_len = 4;
+ }
+ *insn = insn_type;
+ return insn_len;
+}
+
+/* Implement the read_pc gdbarch method. */
+
+static CORE_ADDR
+csky_read_pc (readable_regcache *regcache)
+{
+ ULONGEST pc;
+ regcache->cooked_read (CSKY_PC_REGNUM, &pc);
+ return pc;
+}
+
+/* Implement the write_pc gdbarch method. */
+
+static void
+csky_write_pc (regcache *regcache, CORE_ADDR val)
+{
+ regcache_cooked_write_unsigned (regcache, CSKY_PC_REGNUM, val);
+}
+
+/* Implement the unwind_sp gdbarch method. */
+
+static CORE_ADDR
+csky_unwind_sp (struct gdbarch *gdbarch, struct frame_info *next_frame)
+{
+ return frame_unwind_register_unsigned (next_frame, CSKY_SP_REGNUM);
+}
+
+/* C-Sky ABI register names. */
+
+static const char *csky_register_names[] =
+{
+ /* General registers 0 - 31. */
+ "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
+ "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
+ "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
+ "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
+
+ /* DSP hilo registers 36 and 37. */
+ "", "", "", "", "hi", "lo", "", "",
+
+ /* FPU/VPU general registers 40 - 71. */
+ "fr0", "fr1", "fr2", "fr3", "fr4", "fr5", "fr6", "fr7",
+ "fr8", "fr9", "fr10", "fr11", "fr12", "fr13", "fr14", "fr15",
+ "vr0", "vr1", "vr2", "vr3", "vr4", "vr5", "vr6", "vr7",
+ "vr8", "vr9", "vr10", "vr11", "vr12", "vr13", "vr14", "vr15",
+
+ /* Program counter 72. */
+ "pc",
+
+ /* Optional registers (ar) 73 - 88. */
+ "ar0", "ar1", "ar2", "ar3", "ar4", "ar5", "ar6", "ar7",
+ "ar8", "ar9", "ar10", "ar11", "ar12", "ar13", "ar14", "ar15",
+
+ /* Control registers (cr) 89 - 119. */
+ "psr", "vbr", "epsr", "fpsr", "epc", "fpc", "ss0", "ss1",
+ "ss2", "ss3", "ss4", "gcr", "gsr", "cr13", "cr14", "cr15",
+ "cr16", "cr17", "cr18", "cr19", "cr20", "cr21", "cr22", "cr23",
+ "cr24", "cr25", "cr26", "cr27", "cr28", "cr29", "cr30", "cr31",
+
+ /* FPU/VPU control registers 121 ~ 123. */
+ /* User sp 127. */
+ "fid", "fcr", "fesr", "", "", "", "usp",
+
+ /* MMU control registers: 128 - 136. */
+ "mcr0", "mcr2", "mcr3", "mcr4", "mcr6", "mcr8", "mcr29", "mcr30",
+ "mcr31", "", "", "",
+
+ /* Profiling control registers 140 - 143. */
+ /* Profiling software general registers 144 - 157. */
+ "profcr0", "profcr1", "profcr2", "profcr3", "profsgr0", "profsgr1",
+ "profsgr2", "profsgr3", "profsgr4", "profsgr5", "profsgr6", "profsgr7",
+ "profsgr8", "profsgr9", "profsgr10","profsgr11","profsgr12", "profsgr13",
+ "", "",
+
+ /* Profiling architecture general registers 160 - 174. */
+ "profagr0", "profagr1", "profagr2", "profagr3", "profagr4", "profagr5",
+ "profagr6", "profagr7", "profagr8", "profagr9", "profagr10","profagr11",
+ "profagr12","profagr13","profagr14", "",
+
+ /* Profiling extension general registers 176 - 188. */
+ "profxgr0", "profxgr1", "profxgr2", "profxgr3", "profxgr4", "profxgr5",
+ "profxgr6", "profxgr7", "profxgr8", "profxgr9", "profxgr10","profxgr11",
+ "profxgr12",
+
+ /* Control registers in bank1. */
+ "", "", "", "", "", "", "", "",
+ "", "", "", "", "", "", "", "",
+ "cp1cr16", "cp1cr17", "cp1cr18", "cp1cr19", "cp1cr20", "", "", "",
+ "", "", "", "", "", "", "", "",
+
+ /* Control registers in bank3 (ICE). */
+ "sepsr", "sevbr", "seepsr", "", "seepc", "", "nsssp", "seusp",
+ "sedcr", "", "", "", "", "", "", "",
+ "", "", "", "", "", "", "", "",
+ "", "", "", "", "", "", "", ""
+};
+
+/* Implement the register_name gdbarch method. */
+
+static const char *
+csky_register_name (struct gdbarch *gdbarch, int reg_nr)
+{
+ if (tdesc_has_registers (gdbarch_target_desc (gdbarch)))
+ return tdesc_register_name (gdbarch, reg_nr);
+
+ if (reg_nr < 0)
+ return NULL;
+
+ if (reg_nr >= gdbarch_num_regs (gdbarch))
+ return NULL;
+
+ return csky_register_names[reg_nr];
+}
+
+/* Construct vector type for vrx registers. */
+
+static struct type *
+csky_vector_type (struct gdbarch *gdbarch)
+{
+ const struct builtin_type *bt = builtin_type (gdbarch);
+
+ struct type *t;
+
+ t = arch_composite_type (gdbarch, "__gdb_builtin_type_vec128i",
+ TYPE_CODE_UNION);
+
+ append_composite_type_field (t, "u32",
+ init_vector_type (bt->builtin_int32, 4));
+ append_composite_type_field (t, "u16",
+ init_vector_type (bt->builtin_int16, 8));
+ append_composite_type_field (t, "u8",
+ init_vector_type (bt->builtin_int8, 16));
+
+ TYPE_VECTOR (t) = 1;
+ TYPE_NAME (t) = "builtin_type_vec128i";
+
+ return t;
+}
+
+/* Return the GDB type object for the "standard" data type
+ of data in register N. */
+
+static struct type *
+csky_register_type (struct gdbarch *gdbarch, int reg_nr)
+{
+ /* PC, EPC, FPC is a text pointer. */
+ if ((reg_nr == CSKY_PC_REGNUM) || (reg_nr == CSKY_EPC_REGNUM)
+ || (reg_nr == CSKY_FPC_REGNUM))
+ return builtin_type (gdbarch)->builtin_func_ptr;
+
+ /* VBR is a data pointer. */
+ if (reg_nr == CSKY_VBR_REGNUM)
+ return builtin_type (gdbarch)->builtin_data_ptr;
+
+ /* Float register has 64 bits, and only in ck810. */
+ if ((reg_nr >=CSKY_FR0_REGNUM) && (reg_nr <= CSKY_FR0_REGNUM + 15))
+ return arch_float_type (gdbarch, 64, "builtin_type_csky_ext",
+ floatformats_ieee_double);
+
+ /* Vector register has 128 bits, and only in ck810. */
+ if ((reg_nr >= CSKY_VR0_REGNUM) && (reg_nr <= CSKY_VR0_REGNUM + 15))
+ return csky_vector_type (gdbarch);
+
+ /* Profiling general register has 48 bits, we use 64bit. */
+ if ((reg_nr >= CSKY_PROFGR_REGNUM) && (reg_nr <= CSKY_PROFGR_REGNUM + 44))
+ return builtin_type (gdbarch)->builtin_uint64;
+
+ if (reg_nr == CSKY_SP_REGNUM)
+ return builtin_type (gdbarch)->builtin_data_ptr;
+
+ /* Others are 32 bits. */
+ return builtin_type (gdbarch)->builtin_int32;
+}
+
+/* Data structure to marshall items in a dummy stack frame when
+ calling a function in the inferior. */
+
+struct stack_item
+{
+ stack_item (int len_, const gdb_byte *data_)
+ : len (len_), data (data_)
+ {}
+
+ int len;
+ const gdb_byte *data;
+};
+
+/* Implement the push_dummy_call gdbarch method. */
+
+static CORE_ADDR
+csky_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
+ struct regcache *regcache, CORE_ADDR bp_addr,
+ int nargs, struct value **args, CORE_ADDR sp,
+ int struct_return, CORE_ADDR struct_addr)
+{
+ int argnum;
+ int argreg = CSKY_ABI_A0_REGNUM;
+ int last_arg_regnum = CSKY_ABI_LAST_ARG_REGNUM;
+ int need_dummy_stack = 0;
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ std::vector<stack_item> stack_items;
+
+ /* Set the return address. For CSKY, the return breakpoint is
+ always at BP_ADDR. */
+ regcache_cooked_write_unsigned (regcache, CSKY_LR_REGNUM, bp_addr);
+
+ /* The struct_return pointer occupies the first parameter
+ passing register. */
+ if (struct_return)
+ {
+ if (csky_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog,
+ "csky: struct return in %s = %s\n",
+ gdbarch_register_name (gdbarch, argreg),
+ paddress (gdbarch, struct_addr));
+ }
+ regcache_cooked_write_unsigned (regcache, argreg, struct_addr);
+ argreg++;
+ }
+
+ /* Put parameters into argument registers in REGCACHE.
+ In ABI argument registers are r0 through r3. */
+ for (argnum = 0; argnum < nargs; argnum++)
+ {
+ int len;
+ struct type *arg_type;
+ const gdb_byte *val;
+
+ arg_type = check_typedef (value_type (args[argnum]));
+ len = TYPE_LENGTH (arg_type);
+ val = value_contents (args[argnum]);
+
+ /* Copy the argument to argument registers or the dummy stack.
+ Large arguments are split between registers and stack.
+
+ If len < 4, there is no need to worry about endianness since
+ the arguments will always be stored in the low address. */
+ if (len < 4)
+ {
+ CORE_ADDR regval
+ = extract_unsigned_integer (val, len, byte_order);
+ 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 "
+ "0x%lx\n", 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;
+ int offset = 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");
+ }
+ 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 0x%lx\n",
+ 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.\n"),
+ (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);
+}
projects / binutils-gdb.git / commitdiff