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-rw-r--r--gdb/v850-tdep.c1249
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diff --git a/gdb/v850-tdep.c b/gdb/v850-tdep.c
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--- a/gdb/v850-tdep.c
+++ /dev/null
@@ -1,1249 +0,0 @@
-/* Target-dependent code for the NEC V850 for GDB, the GNU debugger.
-
- Copyright 1996, 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free
- Software Foundation, Inc.
-
- This file is part of GDB.
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- 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, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
-
-#include "defs.h"
-#include "frame.h"
-#include "inferior.h"
-#include "target.h"
-#include "value.h"
-#include "bfd.h"
-#include "gdb_string.h"
-#include "gdbcore.h"
-#include "objfiles.h"
-#include "arch-utils.h"
-#include "regcache.h"
-#include "symtab.h"
-#include "dis-asm.h"
-
-struct gdbarch_tdep
-{
- /* gdbarch target dependent data here. Currently unused for v850. */
-};
-
-/* Extra info which is saved in each frame_info. */
-struct frame_extra_info
-{
-};
-
-enum {
- E_R0_REGNUM,
- E_R1_REGNUM,
- E_R2_REGNUM, E_SAVE1_START_REGNUM = E_R2_REGNUM, E_SAVE1_END_REGNUM = E_R2_REGNUM,
- E_R3_REGNUM, E_SP_REGNUM = E_R3_REGNUM,
- E_R4_REGNUM,
- E_R5_REGNUM,
- E_R6_REGNUM, E_ARG0_REGNUM = E_R6_REGNUM,
- E_R7_REGNUM,
- E_R8_REGNUM,
- E_R9_REGNUM, E_ARGLAST_REGNUM = E_R9_REGNUM,
- E_R10_REGNUM, E_V0_REGNUM = E_R10_REGNUM,
- E_R11_REGNUM, E_V1_REGNUM = E_R11_REGNUM,
- E_R12_REGNUM,
- E_R13_REGNUM,
- E_R14_REGNUM,
- E_R15_REGNUM,
- E_R16_REGNUM,
- E_R17_REGNUM,
- E_R18_REGNUM,
- E_R19_REGNUM,
- E_R20_REGNUM, E_SAVE2_START_REGNUM = E_R20_REGNUM,
- E_R21_REGNUM,
- E_R22_REGNUM,
- E_R23_REGNUM,
- E_R24_REGNUM,
- E_R25_REGNUM,
- E_R26_REGNUM,
- E_R27_REGNUM,
- E_R28_REGNUM,
- E_R29_REGNUM, E_SAVE2_END_REGNUM = E_R29_REGNUM, E_FP_RAW_REGNUM = E_R29_REGNUM,
- E_R30_REGNUM, E_EP_REGNUM = E_R30_REGNUM,
- E_R31_REGNUM, E_SAVE3_START_REGNUM = E_R31_REGNUM, E_SAVE3_END_REGNUM = E_R31_REGNUM, E_RP_REGNUM = E_R31_REGNUM,
- E_R32_REGNUM, E_SR0_REGNUM = E_R32_REGNUM,
- E_R33_REGNUM,
- E_R34_REGNUM,
- E_R35_REGNUM,
- E_R36_REGNUM,
- E_R37_REGNUM, E_PS_REGNUM = E_R37_REGNUM,
- E_R38_REGNUM,
- E_R39_REGNUM,
- E_R40_REGNUM,
- E_R41_REGNUM,
- E_R42_REGNUM,
- E_R43_REGNUM,
- E_R44_REGNUM,
- E_R45_REGNUM,
- E_R46_REGNUM,
- E_R47_REGNUM,
- E_R48_REGNUM,
- E_R49_REGNUM,
- E_R50_REGNUM,
- E_R51_REGNUM,
- E_R52_REGNUM, E_CTBP_REGNUM = E_R52_REGNUM,
- E_R53_REGNUM,
- E_R54_REGNUM,
- E_R55_REGNUM,
- E_R56_REGNUM,
- E_R57_REGNUM,
- E_R58_REGNUM,
- E_R59_REGNUM,
- E_R60_REGNUM,
- E_R61_REGNUM,
- E_R62_REGNUM,
- E_R63_REGNUM,
- E_R64_REGNUM, E_PC_REGNUM = E_R64_REGNUM,
- E_R65_REGNUM, E_FP_REGNUM = E_R65_REGNUM,
- E_NUM_REGS
-};
-
-enum
-{
- v850_reg_size = 4
-};
-
-/* Size of all registers as a whole. */
-enum
-{
- E_ALL_REGS_SIZE = (E_NUM_REGS) * v850_reg_size
-};
-
-/* Size of return datatype which fits into all return registers. */
-enum
-{
- E_MAX_RETTYPE_SIZE_IN_REGS = 2 * v850_reg_size
-};
-
-static LONGEST call_dummy_nil[] = {0};
-
-static char *v850_generic_reg_names[] =
-{ "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",
- "eipc", "eipsw", "fepc", "fepsw", "ecr", "psw", "sr6", "sr7",
- "sr8", "sr9", "sr10", "sr11", "sr12", "sr13", "sr14", "sr15",
- "sr16", "sr17", "sr18", "sr19", "sr20", "sr21", "sr22", "sr23",
- "sr24", "sr25", "sr26", "sr27", "sr28", "sr29", "sr30", "sr31",
- "pc", "fp"
-};
-
-static char *v850e_reg_names[] =
-{
- "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",
- "eipc", "eipsw", "fepc", "fepsw", "ecr", "psw", "sr6", "sr7",
- "sr8", "sr9", "sr10", "sr11", "sr12", "sr13", "sr14", "sr15",
- "ctpc", "ctpsw", "dbpc", "dbpsw", "ctbp", "sr21", "sr22", "sr23",
- "sr24", "sr25", "sr26", "sr27", "sr28", "sr29", "sr30", "sr31",
- "pc", "fp"
-};
-
-char **v850_register_names = v850_generic_reg_names;
-
-struct
- {
- char **regnames;
- int mach;
- }
-v850_processor_type_table[] =
-{
- {
- v850_generic_reg_names, bfd_mach_v850
- }
- ,
- {
- v850e_reg_names, bfd_mach_v850e
- }
- ,
- {
- v850e_reg_names, bfd_mach_v850e1
- }
- ,
- {
- NULL, 0
- }
-};
-
-/* Info gleaned from scanning a function's prologue. */
-
-struct pifsr /* Info about one saved reg */
- {
- int framereg; /* Frame reg (SP or FP) */
- int offset; /* Offset from framereg */
- int cur_frameoffset; /* Current frameoffset */
- int reg; /* Saved register number */
- };
-
-struct prologue_info
- {
- int framereg;
- int frameoffset;
- int start_function;
- struct pifsr *pifsrs;
- };
-
-static CORE_ADDR v850_scan_prologue (CORE_ADDR pc, struct prologue_info *fs);
-
-/* Function: v850_register_name
- Returns the name of the v850/v850e register N. */
-
-static const char *
-v850_register_name (int regnum)
-{
- if (regnum < 0 || regnum >= E_NUM_REGS)
- internal_error (__FILE__, __LINE__,
- "v850_register_name: illegal register number %d",
- regnum);
- else
- return v850_register_names[regnum];
-
-}
-
-/* Function: v850_register_byte
- Returns the byte position in the register cache for register N. */
-
-static int
-v850_register_byte (int regnum)
-{
- if (regnum < 0 || regnum >= E_NUM_REGS)
- internal_error (__FILE__, __LINE__,
- "v850_register_byte: illegal register number %d",
- regnum);
- else
- return regnum * v850_reg_size;
-}
-
-/* Function: v850_register_raw_size
- Returns the number of bytes occupied by the register on the target. */
-
-static int
-v850_register_raw_size (int regnum)
-{
- if (regnum < 0 || regnum >= E_NUM_REGS)
- internal_error (__FILE__, __LINE__,
- "v850_register_raw_size: illegal register number %d",
- regnum);
- /* Only the PC has 4 Byte, all other registers 2 Byte. */
- else
- return v850_reg_size;
-}
-
-/* Function: v850_reg_virtual_type
- Returns the default type for register N. */
-
-static struct type *
-v850_reg_virtual_type (int regnum)
-{
- if (regnum < 0 || regnum >= E_NUM_REGS)
- internal_error (__FILE__, __LINE__,
- "v850_register_virtual_type: illegal register number %d",
- regnum);
- else if (regnum == E_PC_REGNUM)
- return builtin_type_uint32;
- else
- return builtin_type_int32;
-}
-
-static int
-v850_type_is_scalar (struct type *t)
-{
- return (TYPE_CODE (t) != TYPE_CODE_STRUCT
- && TYPE_CODE (t) != TYPE_CODE_UNION
- && TYPE_CODE (t) != TYPE_CODE_ARRAY);
-}
-
-/* Should call_function allocate stack space for a struct return? */
-static int
-v850_use_struct_convention (int gcc_p, struct type *type)
-{
- /* According to ABI:
- * return TYPE_LENGTH (type) > 8);
- */
-
- /* Current implementation in gcc: */
-
- int i;
- struct type *fld_type, *tgt_type;
-
- /* 1. The value is greater than 8 bytes -> returned by copying */
- if (TYPE_LENGTH (type) > 8)
- return 1;
-
- /* 2. The value is a single basic type -> returned in register */
- if (v850_type_is_scalar (type))
- return 0;
-
- /* The value is a structure or union with a single element
- * and that element is either a single basic type or an array of
- * a single basic type whoes size is greater than or equal to 4
- * -> returned in register */
- if ((TYPE_CODE (type) == TYPE_CODE_STRUCT
- || TYPE_CODE (type) == TYPE_CODE_UNION)
- && TYPE_NFIELDS (type) == 1)
- {
- fld_type = TYPE_FIELD_TYPE (type, 0);
- if (v850_type_is_scalar (fld_type) && TYPE_LENGTH (fld_type) >= 4)
- return 0;
-
- if (TYPE_CODE (fld_type) == TYPE_CODE_ARRAY)
- {
- tgt_type = TYPE_TARGET_TYPE (fld_type);
- if (v850_type_is_scalar (tgt_type) && TYPE_LENGTH (tgt_type) >= 4)
- return 0;
- }
- }
-
- /* The value is a structure whose first element is an integer or
- * a float, and which contains no arrays of more than two elements
- * -> returned in register */
- if (TYPE_CODE (type) == TYPE_CODE_STRUCT
- && v850_type_is_scalar (TYPE_FIELD_TYPE (type, 0))
- && TYPE_LENGTH (TYPE_FIELD_TYPE (type, 0)) == 4)
- {
- for (i = 1; i < TYPE_NFIELDS (type); ++i)
- {
- fld_type = TYPE_FIELD_TYPE (type, 0);
- if (TYPE_CODE (fld_type) == TYPE_CODE_ARRAY)
- {
- tgt_type = TYPE_TARGET_TYPE (fld_type);
- if (TYPE_LENGTH (fld_type) >= 0 && TYPE_LENGTH (tgt_type) >= 0
- && TYPE_LENGTH (fld_type) / TYPE_LENGTH (tgt_type) > 2)
- return 1;
- }
- }
- return 0;
- }
-
- /* The value is a union which contains at least one field which
- * would be returned in registers according to these rules
- * -> returned in register */
- if (TYPE_CODE (type) == TYPE_CODE_UNION)
- {
- for (i = 0; i < TYPE_NFIELDS (type); ++i)
- {
- fld_type = TYPE_FIELD_TYPE (type, 0);
- if (!v850_use_struct_convention (0, fld_type))
- return 0;
- }
- }
-
- return 1;
-}
-
-
-
-/* Structure for mapping bits in register lists to register numbers. */
-struct reg_list
-{
- long mask;
- int regno;
-};
-
-/* Helper function for v850_scan_prologue to handle prepare instruction. */
-
-static void
-handle_prepare (int insn, int insn2, CORE_ADDR * current_pc_ptr,
- struct prologue_info *pi, struct pifsr **pifsr_ptr)
-{
- CORE_ADDR current_pc = *current_pc_ptr;
- struct pifsr *pifsr = *pifsr_ptr;
- long next = insn2 & 0xffff;
- long list12 = ((insn & 1) << 16) + (next & 0xffe0);
- long offset = (insn & 0x3e) << 1;
- static struct reg_list reg_table[] =
- {
- {0x00800, 20}, /* r20 */
- {0x00400, 21}, /* r21 */
- {0x00200, 22}, /* r22 */
- {0x00100, 23}, /* r23 */
- {0x08000, 24}, /* r24 */
- {0x04000, 25}, /* r25 */
- {0x02000, 26}, /* r26 */
- {0x01000, 27}, /* r27 */
- {0x00080, 28}, /* r28 */
- {0x00040, 29}, /* r29 */
- {0x10000, 30}, /* ep */
- {0x00020, 31}, /* lp */
- {0, 0} /* end of table */
- };
- int i;
-
- if ((next & 0x1f) == 0x0b) /* skip imm16 argument */
- current_pc += 2;
- else if ((next & 0x1f) == 0x13) /* skip imm16 argument */
- current_pc += 2;
- else if ((next & 0x1f) == 0x1b) /* skip imm32 argument */
- current_pc += 4;
-
- /* Calculate the total size of the saved registers, and add it
- it to the immediate value used to adjust SP. */
- for (i = 0; reg_table[i].mask != 0; i++)
- if (list12 & reg_table[i].mask)
- offset += v850_register_raw_size (reg_table[i].regno);
- pi->frameoffset -= offset;
-
- /* Calculate the offsets of the registers relative to the value
- the SP will have after the registers have been pushed and the
- imm5 value has been subtracted from it. */
- if (pifsr)
- {
- for (i = 0; reg_table[i].mask != 0; i++)
- {
- if (list12 & reg_table[i].mask)
- {
- int reg = reg_table[i].regno;
- offset -= v850_register_raw_size (reg);
- pifsr->reg = reg;
- pifsr->offset = offset;
- pifsr->cur_frameoffset = pi->frameoffset;
-#ifdef DEBUG
- printf_filtered ("\tSaved register r%d, offset %d", reg, pifsr->offset);
-#endif
- pifsr++;
- }
- }
- }
-#ifdef DEBUG
- printf_filtered ("\tfound ctret after regsave func");
-#endif
-
- /* Set result parameters. */
- *current_pc_ptr = current_pc;
- *pifsr_ptr = pifsr;
-}
-
-
-/* Helper function for v850_scan_prologue to handle pushm/pushl instructions.
- FIXME: the SR bit of the register list is not supported; must check
- that the compiler does not ever generate this bit. */
-
-static void
-handle_pushm (int insn, int insn2, struct prologue_info *pi,
- struct pifsr **pifsr_ptr)
-{
- struct pifsr *pifsr = *pifsr_ptr;
- long list12 = ((insn & 0x0f) << 16) + (insn2 & 0xfff0);
- long offset = 0;
- static struct reg_list pushml_reg_table[] =
- {
- {0x80000, E_PS_REGNUM}, /* PSW */
- {0x40000, 1}, /* r1 */
- {0x20000, 2}, /* r2 */
- {0x10000, 3}, /* r3 */
- {0x00800, 4}, /* r4 */
- {0x00400, 5}, /* r5 */
- {0x00200, 6}, /* r6 */
- {0x00100, 7}, /* r7 */
- {0x08000, 8}, /* r8 */
- {0x04000, 9}, /* r9 */
- {0x02000, 10}, /* r10 */
- {0x01000, 11}, /* r11 */
- {0x00080, 12}, /* r12 */
- {0x00040, 13}, /* r13 */
- {0x00020, 14}, /* r14 */
- {0x00010, 15}, /* r15 */
- {0, 0} /* end of table */
- };
- static struct reg_list pushmh_reg_table[] =
- {
- {0x80000, 16}, /* r16 */
- {0x40000, 17}, /* r17 */
- {0x20000, 18}, /* r18 */
- {0x10000, 19}, /* r19 */
- {0x00800, 20}, /* r20 */
- {0x00400, 21}, /* r21 */
- {0x00200, 22}, /* r22 */
- {0x00100, 23}, /* r23 */
- {0x08000, 24}, /* r24 */
- {0x04000, 25}, /* r25 */
- {0x02000, 26}, /* r26 */
- {0x01000, 27}, /* r27 */
- {0x00080, 28}, /* r28 */
- {0x00040, 29}, /* r29 */
- {0x00010, 30}, /* r30 */
- {0x00020, 31}, /* r31 */
- {0, 0} /* end of table */
- };
- struct reg_list *reg_table;
- int i;
-
- /* Is this a pushml or a pushmh? */
- if ((insn2 & 7) == 1)
- reg_table = pushml_reg_table;
- else
- reg_table = pushmh_reg_table;
-
- /* Calculate the total size of the saved registers, and add it
- it to the immediate value used to adjust SP. */
- for (i = 0; reg_table[i].mask != 0; i++)
- if (list12 & reg_table[i].mask)
- offset += v850_register_raw_size (reg_table[i].regno);
- pi->frameoffset -= offset;
-
- /* Calculate the offsets of the registers relative to the value
- the SP will have after the registers have been pushed and the
- imm5 value is subtracted from it. */
- if (pifsr)
- {
- for (i = 0; reg_table[i].mask != 0; i++)
- {
- if (list12 & reg_table[i].mask)
- {
- int reg = reg_table[i].regno;
- offset -= v850_register_raw_size (reg);
- pifsr->reg = reg;
- pifsr->offset = offset;
- pifsr->cur_frameoffset = pi->frameoffset;
-#ifdef DEBUG
- printf_filtered ("\tSaved register r%d, offset %d", reg, pifsr->offset);
-#endif
- pifsr++;
- }
- }
- }
-#ifdef DEBUG
- printf_filtered ("\tfound ctret after regsave func");
-#endif
-
- /* Set result parameters. */
- *pifsr_ptr = pifsr;
-}
-
-
-
-
-/* Function: scan_prologue
- Scan the prologue of the function that contains PC, and record what
- we find in PI. Returns the pc after the prologue. Note that the
- addresses saved in frame->saved_regs are just frame relative (negative
- offsets from the frame pointer). This is because we don't know the
- actual value of the frame pointer yet. In some circumstances, the
- frame pointer can't be determined till after we have scanned the
- prologue. */
-
-static CORE_ADDR
-v850_scan_prologue (CORE_ADDR pc, struct prologue_info *pi)
-{
- CORE_ADDR func_addr, prologue_end, current_pc;
- struct pifsr *pifsr, *pifsr_tmp;
- int fp_used;
- int ep_used;
- int reg;
- CORE_ADDR save_pc, save_end;
- int regsave_func_p;
- int r12_tmp;
-
- /* First, figure out the bounds of the prologue so that we can limit the
- search to something reasonable. */
-
- if (find_pc_partial_function (pc, NULL, &func_addr, NULL))
- {
- struct symtab_and_line sal;
-
- sal = find_pc_line (func_addr, 0);
-
- if (func_addr == entry_point_address ())
- pi->start_function = 1;
- else
- pi->start_function = 0;
-
-#if 0
- if (sal.line == 0)
- prologue_end = pc;
- else
- prologue_end = sal.end;
-#else
- prologue_end = pc;
-#endif
- }
- else
- { /* We're in the boondocks */
- func_addr = pc - 100;
- prologue_end = pc;
- }
-
- prologue_end = min (prologue_end, pc);
-
- /* Now, search the prologue looking for instructions that setup fp, save
- rp, adjust sp and such. We also record the frame offset of any saved
- registers. */
-
- pi->frameoffset = 0;
- pi->framereg = E_SP_REGNUM;
- fp_used = 0;
- ep_used = 0;
- pifsr = pi->pifsrs;
- regsave_func_p = 0;
- save_pc = 0;
- save_end = 0;
- r12_tmp = 0;
-
-#ifdef DEBUG
- printf_filtered ("Current_pc = 0x%.8lx, prologue_end = 0x%.8lx\n",
- (long) func_addr, (long) prologue_end);
-#endif
-
- for (current_pc = func_addr; current_pc < prologue_end;)
- {
- int insn;
- int insn2 = -1; /* dummy value */
-
-#ifdef DEBUG
- fprintf_filtered (gdb_stdlog, "0x%.8lx ", (long) current_pc);
- gdb_print_insn (current_pc, gdb_stdlog);
-#endif
-
- insn = read_memory_unsigned_integer (current_pc, 2);
- current_pc += 2;
- if ((insn & 0x0780) >= 0x0600) /* Four byte instruction? */
- {
- insn2 = read_memory_unsigned_integer (current_pc, 2);
- current_pc += 2;
- }
-
- if ((insn & 0xffc0) == ((10 << 11) | 0x0780) && !regsave_func_p)
- { /* jarl <func>,10 */
- long low_disp = insn2 & ~(long) 1;
- long disp = (((((insn & 0x3f) << 16) + low_disp)
- & ~(long) 1) ^ 0x00200000) - 0x00200000;
-
- save_pc = current_pc;
- save_end = prologue_end;
- regsave_func_p = 1;
- current_pc += disp - 4;
- prologue_end = (current_pc
- + (2 * 3) /* moves to/from ep */
- + 4 /* addi <const>,sp,sp */
- + 2 /* jmp [r10] */
- + (2 * 12) /* sst.w to save r2, r20-r29, r31 */
- + 20); /* slop area */
-
-#ifdef DEBUG
- printf_filtered ("\tfound jarl <func>,r10, disp = %ld, low_disp = %ld, new pc = 0x%.8lx\n",
- disp, low_disp, (long) current_pc + 2);
-#endif
- continue;
- }
- else if ((insn & 0xffc0) == 0x0200 && !regsave_func_p)
- { /* callt <imm6> */
- long ctbp = read_register (E_CTBP_REGNUM);
- long adr = ctbp + ((insn & 0x3f) << 1);
-
- save_pc = current_pc;
- save_end = prologue_end;
- regsave_func_p = 1;
- current_pc = ctbp + (read_memory_unsigned_integer (adr, 2) & 0xffff);
- prologue_end = (current_pc
- + (2 * 3) /* prepare list2,imm5,sp/imm */
- + 4 /* ctret */
- + 20); /* slop area */
-
-#ifdef DEBUG
- printf_filtered ("\tfound callt, ctbp = 0x%.8lx, adr = %.8lx, new pc = 0x%.8lx\n",
- ctbp, adr, (long) current_pc);
-#endif
- continue;
- }
- else if ((insn & 0xffc0) == 0x0780) /* prepare list2,imm5 */
- {
- handle_prepare (insn, insn2, &current_pc, pi, &pifsr);
- continue;
- }
- else if (insn == 0x07e0 && regsave_func_p && insn2 == 0x0144)
- { /* ctret after processing register save function */
- current_pc = save_pc;
- prologue_end = save_end;
- regsave_func_p = 0;
-#ifdef DEBUG
- printf_filtered ("\tfound ctret after regsave func");
-#endif
- continue;
- }
- else if ((insn & 0xfff0) == 0x07e0 && (insn2 & 5) == 1)
- { /* pushml, pushmh */
- handle_pushm (insn, insn2, pi, &pifsr);
- continue;
- }
- else if ((insn & 0xffe0) == 0x0060 && regsave_func_p)
- { /* jmp after processing register save function */
- current_pc = save_pc;
- prologue_end = save_end;
- regsave_func_p = 0;
-#ifdef DEBUG
- printf_filtered ("\tfound jmp after regsave func");
-#endif
- continue;
- }
- else if ((insn & 0x07c0) == 0x0780 /* jarl or jr */
- || (insn & 0xffe0) == 0x0060 /* jmp */
- || (insn & 0x0780) == 0x0580) /* branch */
- {
-#ifdef DEBUG
- printf_filtered ("\n");
-#endif
- break; /* Ran into end of prologue */
- }
-
- else if ((insn & 0xffe0) == ((E_SP_REGNUM << 11) | 0x0240)) /* add <imm>,sp */
- pi->frameoffset += ((insn & 0x1f) ^ 0x10) - 0x10;
- else if (insn == ((E_SP_REGNUM << 11) | 0x0600 | E_SP_REGNUM)) /* addi <imm>,sp,sp */
- pi->frameoffset += insn2;
- else if (insn == ((E_FP_RAW_REGNUM << 11) | 0x0000 | E_SP_REGNUM)) /* mov sp,fp */
- {
- fp_used = 1;
- pi->framereg = E_FP_RAW_REGNUM;
- }
-
- else if (insn == ((E_R12_REGNUM << 11) | 0x0640 | E_R0_REGNUM)) /* movhi hi(const),r0,r12 */
- r12_tmp = insn2 << 16;
- else if (insn == ((E_R12_REGNUM << 11) | 0x0620 | E_R12_REGNUM)) /* movea lo(const),r12,r12 */
- r12_tmp += insn2;
- else if (insn == ((E_SP_REGNUM << 11) | 0x01c0 | E_R12_REGNUM) && r12_tmp) /* add r12,sp */
- pi->frameoffset = r12_tmp;
- else if (insn == ((E_EP_REGNUM << 11) | 0x0000 | E_SP_REGNUM)) /* mov sp,ep */
- ep_used = 1;
- else if (insn == ((E_EP_REGNUM << 11) | 0x0000 | E_R1_REGNUM)) /* mov r1,ep */
- ep_used = 0;
- else if (((insn & 0x07ff) == (0x0760 | E_SP_REGNUM) /* st.w <reg>,<offset>[sp] */
- || (fp_used
- && (insn & 0x07ff) == (0x0760 | E_FP_RAW_REGNUM))) /* st.w <reg>,<offset>[fp] */
- && pifsr
- && (((reg = (insn >> 11) & 0x1f) >= E_SAVE1_START_REGNUM && reg <= E_SAVE1_END_REGNUM)
- || (reg >= E_SAVE2_START_REGNUM && reg <= E_SAVE2_END_REGNUM)
- || (reg >= E_SAVE3_START_REGNUM && reg <= E_SAVE3_END_REGNUM)))
- {
- pifsr->reg = reg;
- pifsr->offset = insn2 & ~1;
- pifsr->cur_frameoffset = pi->frameoffset;
-#ifdef DEBUG
- printf_filtered ("\tSaved register r%d, offset %d", reg, pifsr->offset);
-#endif
- pifsr++;
- }
-
- else if (ep_used /* sst.w <reg>,<offset>[ep] */
- && ((insn & 0x0781) == 0x0501)
- && pifsr
- && (((reg = (insn >> 11) & 0x1f) >= E_SAVE1_START_REGNUM && reg <= E_SAVE1_END_REGNUM)
- || (reg >= E_SAVE2_START_REGNUM && reg <= E_SAVE2_END_REGNUM)
- || (reg >= E_SAVE3_START_REGNUM && reg <= E_SAVE3_END_REGNUM)))
- {
- pifsr->reg = reg;
- pifsr->offset = (insn & 0x007e) << 1;
- pifsr->cur_frameoffset = pi->frameoffset;
-#ifdef DEBUG
- printf_filtered ("\tSaved register r%d, offset %d", reg, pifsr->offset);
-#endif
- pifsr++;
- }
-
-#ifdef DEBUG
- printf_filtered ("\n");
-#endif
- }
-
- if (pifsr)
- pifsr->framereg = 0; /* Tie off last entry */
-
- /* Fix up any offsets to the final offset. If a frame pointer was created, use it
- instead of the stack pointer. */
- for (pifsr_tmp = pi->pifsrs; pifsr_tmp && pifsr_tmp != pifsr; pifsr_tmp++)
- {
- pifsr_tmp->offset -= pi->frameoffset - pifsr_tmp->cur_frameoffset;
- pifsr_tmp->framereg = pi->framereg;
-
-#ifdef DEBUG
- printf_filtered ("Saved register r%d, offset = %d, framereg = r%d\n",
- pifsr_tmp->reg, pifsr_tmp->offset, pifsr_tmp->framereg);
-#endif
- }
-
-#ifdef DEBUG
- printf_filtered ("Framereg = r%d, frameoffset = %d\n", pi->framereg, pi->frameoffset);
-#endif
-
- return current_pc;
-}
-
-/* Function: find_callers_reg
- Find REGNUM on the stack. Otherwise, it's in an active register.
- One thing we might want to do here is to check REGNUM against the
- clobber mask, and somehow flag it as invalid if it isn't saved on
- the stack somewhere. This would provide a graceful failure mode
- when trying to get the value of caller-saves registers for an inner
- frame. */
-
-static CORE_ADDR
-v850_find_callers_reg (struct frame_info *fi, int regnum)
-{
- for (; fi; fi = get_next_frame (fi))
- if (deprecated_pc_in_call_dummy (get_frame_pc (fi)))
- return deprecated_read_register_dummy (get_frame_pc (fi),
- get_frame_base (fi), regnum);
- else if (deprecated_get_frame_saved_regs (fi)[regnum] != 0)
- return read_memory_unsigned_integer (deprecated_get_frame_saved_regs (fi)[regnum],
- v850_register_raw_size (regnum));
-
- return read_register (regnum);
-}
-
-/* Function: frame_chain
- Figure out the frame prior to FI. Unfortunately, this involves
- scanning the prologue of the caller, which will also be done
- shortly by v850_init_extra_frame_info. For the dummy frame, we
- just return the stack pointer that was in use at the time the
- function call was made. */
-
-static CORE_ADDR
-v850_frame_chain (struct frame_info *fi)
-{
- struct prologue_info pi;
- CORE_ADDR callers_pc, fp;
-
- /* First, find out who called us */
- callers_pc = DEPRECATED_FRAME_SAVED_PC (fi);
- /* If caller is a call-dummy, then our FP bears no relation to his FP! */
- fp = v850_find_callers_reg (fi, E_FP_RAW_REGNUM);
- if (deprecated_pc_in_call_dummy (callers_pc))
- return fp; /* caller is call-dummy: return oldest value of FP */
-
- /* Caller is NOT a call-dummy, so everything else should just work.
- Even if THIS frame is a call-dummy! */
- pi.pifsrs = NULL;
-
- v850_scan_prologue (callers_pc, &pi);
-
- if (pi.start_function)
- return 0; /* Don't chain beyond the start function */
-
- if (pi.framereg == E_FP_RAW_REGNUM)
- return v850_find_callers_reg (fi, pi.framereg);
-
- return get_frame_base (fi) - pi.frameoffset;
-}
-
-/* Function: skip_prologue
- Return the address of the first code past the prologue of the function. */
-
-static CORE_ADDR
-v850_skip_prologue (CORE_ADDR pc)
-{
- CORE_ADDR func_addr, func_end;
-
- /* See what the symbol table says */
-
- if (find_pc_partial_function (pc, NULL, &func_addr, &func_end))
- {
- struct symtab_and_line sal;
-
- sal = find_pc_line (func_addr, 0);
-
- if (sal.line != 0 && sal.end < func_end)
- return sal.end;
- else
- /* Either there's no line info, or the line after the prologue is after
- the end of the function. In this case, there probably isn't a
- prologue. */
- return pc;
- }
-
-/* We can't find the start of this function, so there's nothing we can do. */
- return pc;
-}
-
-/* Function: pop_frame
- This routine gets called when either the user uses the `return'
- command, or the call dummy breakpoint gets hit. */
-
-static void
-v850_pop_frame (void)
-{
- struct frame_info *frame = get_current_frame ();
- int regnum;
-
- if (deprecated_pc_in_call_dummy (get_frame_pc (frame)))
- deprecated_pop_dummy_frame ();
- else
- {
- write_register (E_PC_REGNUM, DEPRECATED_FRAME_SAVED_PC (frame));
-
- for (regnum = 0; regnum < E_NUM_REGS; regnum++)
- if (deprecated_get_frame_saved_regs (frame)[regnum] != 0)
- write_register (regnum,
- read_memory_unsigned_integer (deprecated_get_frame_saved_regs (frame)[regnum],
- v850_register_raw_size (regnum)));
-
- write_register (E_SP_REGNUM, get_frame_base (frame));
- }
-
- flush_cached_frames ();
-}
-
-/* Function: push_arguments
- Setup arguments and RP for a call to the target. First four args
- go in R6->R9, subsequent args go into sp + 16 -> sp + ... Structs
- are passed by reference. 64 bit quantities (doubles and long
- longs) may be split between the regs and the stack. When calling a
- function that returns a struct, a pointer to the struct is passed
- in as a secret first argument (always in R6).
-
- Stack space for the args has NOT been allocated: that job is up to us.
- */
-
-static CORE_ADDR
-v850_push_arguments (int nargs, struct value **args, CORE_ADDR sp,
- int struct_return, CORE_ADDR struct_addr)
-{
- int argreg;
- int argnum;
- int len = 0;
- int stack_offset;
-
- /* First, just for safety, make sure stack is aligned */
- sp &= ~3;
-
- /* The offset onto the stack at which we will start copying parameters
- (after the registers are used up) begins at 16 rather than at zero.
- I don't really know why, that's just the way it seems to work. */
- stack_offset = 16;
-
- /* Now make space on the stack for the args. */
- for (argnum = 0; argnum < nargs; argnum++)
- len += ((TYPE_LENGTH (value_type (args[argnum])) + 3) & ~3);
- sp -= len + stack_offset; /* possibly over-allocating, but it works... */
- /* (you might think we could allocate 16 bytes */
- /* less, but the ABI seems to use it all! ) */
-
- argreg = E_ARG0_REGNUM;
- /* the struct_return pointer occupies the first parameter-passing reg */
- if (struct_return)
- argreg++;
-
- /* Now load as many as possible of the first arguments into
- registers, and push the rest onto the stack. There are 16 bytes
- in four registers available. Loop thru args from first to last. */
- for (argnum = 0; argnum < nargs; argnum++)
- {
- int len;
- char *val;
- char valbuf[v850_register_raw_size (E_ARG0_REGNUM)];
-
- if (!v850_type_is_scalar (value_type (*args))
- && TYPE_LENGTH (value_type (*args)) > E_MAX_RETTYPE_SIZE_IN_REGS)
- {
- store_unsigned_integer (valbuf, 4, VALUE_ADDRESS (*args));
- len = 4;
- val = valbuf;
- }
- else
- {
- len = TYPE_LENGTH (value_type (*args));
- val = (char *) VALUE_CONTENTS (*args);
- }
-
- while (len > 0)
- if (argreg <= E_ARGLAST_REGNUM)
- {
- CORE_ADDR regval;
-
- regval = extract_unsigned_integer (val, v850_register_raw_size (argreg));
- write_register (argreg, regval);
-
- len -= v850_register_raw_size (argreg);
- val += v850_register_raw_size (argreg);
- argreg++;
- }
- else
- {
- write_memory (sp + stack_offset, val, 4);
-
- len -= 4;
- val += 4;
- stack_offset += 4;
- }
- args++;
- }
- return sp;
-}
-
-/* Function: push_return_address (pc)
- Set up the return address for the inferior function call.
- Needed for targets where we don't actually execute a JSR/BSR instruction */
-
-static CORE_ADDR
-v850_push_return_address (CORE_ADDR pc, CORE_ADDR sp)
-{
- write_register (E_RP_REGNUM, entry_point_address ());
- return sp;
-}
-
-/* Function: frame_saved_pc
- Find the caller of this frame. We do this by seeing if E_RP_REGNUM
- is saved in the stack anywhere, otherwise we get it from the
- registers. If the inner frame is a dummy frame, return its PC
- instead of RP, because that's where "caller" of the dummy-frame
- will be found. */
-
-static CORE_ADDR
-v850_frame_saved_pc (struct frame_info *fi)
-{
- if (deprecated_pc_in_call_dummy (get_frame_pc (fi)))
- return deprecated_read_register_dummy (get_frame_pc (fi),
- get_frame_base (fi), E_PC_REGNUM);
- else
- return v850_find_callers_reg (fi, E_RP_REGNUM);
-}
-
-
-static CORE_ADDR
-v850_saved_pc_after_call (struct frame_info *ignore)
-{
- return read_register (E_RP_REGNUM);
-}
-
-static void
-v850_extract_return_value (struct type *type, char *regbuf, char *valbuf)
-{
- CORE_ADDR return_buffer;
-
- if (!v850_use_struct_convention (0, type))
- {
- /* Scalar return values of <= 8 bytes are returned in
- E_V0_REGNUM to E_V1_REGNUM. */
- memcpy (valbuf,
- &regbuf[DEPRECATED_REGISTER_BYTE (E_V0_REGNUM)],
- TYPE_LENGTH (type));
- }
- else
- {
- /* Aggregates and return values > 8 bytes are returned in memory,
- pointed to by R6. */
- return_buffer =
- extract_unsigned_integer (regbuf + DEPRECATED_REGISTER_BYTE (E_V0_REGNUM),
- register_size (current_gdbarch, E_V0_REGNUM));
-
- read_memory (return_buffer, valbuf, TYPE_LENGTH (type));
- }
-}
-
-const static unsigned char *
-v850_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr)
-{
- static unsigned char breakpoint[] = { 0x85, 0x05 };
- *lenptr = sizeof (breakpoint);
- return breakpoint;
-}
-
-static void
-v850_store_return_value (struct type *type, char *valbuf)
-{
- CORE_ADDR return_buffer;
-
- if (!v850_use_struct_convention (0, type))
- deprecated_write_register_bytes (DEPRECATED_REGISTER_BYTE (E_V0_REGNUM), valbuf,
- TYPE_LENGTH (type));
- else
- {
- return_buffer = read_register (E_V0_REGNUM);
- write_memory (return_buffer, valbuf, TYPE_LENGTH (type));
- }
-}
-
-static void
-v850_frame_init_saved_regs (struct frame_info *fi)
-{
- struct prologue_info pi;
- struct pifsr pifsrs[E_NUM_REGS + 1], *pifsr;
- CORE_ADDR func_addr, func_end;
-
- if (!deprecated_get_frame_saved_regs (fi))
- {
- frame_saved_regs_zalloc (fi);
-
- /* The call dummy doesn't save any registers on the stack, so we
- can return now. */
- if (deprecated_pc_in_call_dummy (get_frame_pc (fi)))
- return;
-
- /* Find the beginning of this function, so we can analyze its
- prologue. */
- if (find_pc_partial_function (get_frame_pc (fi), NULL, &func_addr, &func_end))
- {
- pi.pifsrs = pifsrs;
-
- v850_scan_prologue (get_frame_pc (fi), &pi);
-
- if (!get_next_frame (fi) && pi.framereg == E_SP_REGNUM)
- deprecated_update_frame_base_hack (fi, read_register (pi.framereg) - pi.frameoffset);
-
- for (pifsr = pifsrs; pifsr->framereg; pifsr++)
- {
- deprecated_get_frame_saved_regs (fi)[pifsr->reg] = pifsr->offset + get_frame_base (fi);
-
- if (pifsr->framereg == E_SP_REGNUM)
- deprecated_get_frame_saved_regs (fi)[pifsr->reg] += pi.frameoffset;
- }
- }
- /* Else we're out of luck (can't debug completely stripped code).
- FIXME. */
- }
-}
-
-/* Function: init_extra_frame_info
- Setup the frame's frame pointer, pc, and frame addresses for saved
- registers. Most of the work is done in scan_prologue().
-
- Note that when we are called for the last frame (currently active frame),
- that get_frame_pc (fi) and fi->frame will already be setup. However, fi->frame will
- be valid only if this routine uses FP. For previous frames, fi-frame will
- always be correct (since that is derived from v850_frame_chain ()).
-
- We can be called with the PC in the call dummy under two
- circumstances. First, during normal backtracing, second, while
- figuring out the frame pointer just prior to calling the target
- function (see call_function_by_hand). */
-
-static void
-v850_init_extra_frame_info (int fromleaf, struct frame_info *fi)
-{
- struct prologue_info pi;
-
- if (get_next_frame (fi))
- deprecated_update_frame_pc_hack (fi, DEPRECATED_FRAME_SAVED_PC (get_next_frame (fi)));
-
- v850_frame_init_saved_regs (fi);
-}
-
-static void
-v850_store_struct_return (CORE_ADDR addr, CORE_ADDR sp)
-{
- write_register (E_ARG0_REGNUM, addr);
-}
-
-static CORE_ADDR
-v850_target_read_fp (void)
-{
- return read_register (E_FP_RAW_REGNUM);
-}
-
-static struct gdbarch *
-v850_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
-{
- struct gdbarch_tdep *tdep = NULL;
- struct gdbarch *gdbarch;
- int i;
-
- /* find a candidate among the list of pre-declared architectures. */
- arches = gdbarch_list_lookup_by_info (arches, &info);
- if (arches != NULL)
- return (arches->gdbarch);
-
-#if 0
- tdep = (struct gdbarch_tdep *) xmalloc (sizeof (struct gdbarch_tdep));
-#endif
-
- /* Change the register names based on the current machine type. */
- if (info.bfd_arch_info->arch != bfd_arch_v850)
- return 0;
-
- gdbarch = gdbarch_alloc (&info, 0);
-
- /* NOTE: cagney/2002-12-06: This can be deleted when this arch is
- ready to unwind the PC first (see frame.c:get_prev_frame()). */
- set_gdbarch_deprecated_init_frame_pc (gdbarch, deprecated_init_frame_pc_default);
-
- for (i = 0; v850_processor_type_table[i].regnames != NULL; i++)
- {
- if (v850_processor_type_table[i].mach == info.bfd_arch_info->mach)
- {
- v850_register_names = v850_processor_type_table[i].regnames;
- break;
- }
- }
-
- /*
- * Basic register fields and methods.
- */
- set_gdbarch_num_regs (gdbarch, E_NUM_REGS);
- set_gdbarch_num_pseudo_regs (gdbarch, 0);
- set_gdbarch_sp_regnum (gdbarch, E_SP_REGNUM);
- set_gdbarch_deprecated_fp_regnum (gdbarch, E_FP_REGNUM);
- set_gdbarch_pc_regnum (gdbarch, E_PC_REGNUM);
- set_gdbarch_register_name (gdbarch, v850_register_name);
- set_gdbarch_deprecated_register_size (gdbarch, v850_reg_size);
- set_gdbarch_deprecated_register_byte (gdbarch, v850_register_byte);
- set_gdbarch_deprecated_register_raw_size (current_gdbarch, gdbarch, v850_register_raw_size);
- set_gdbarch_deprecated_register_virtual_size (gdbarch, v850_register_raw_size);
- set_gdbarch_deprecated_register_virtual_type (gdbarch, v850_reg_virtual_type);
-
- set_gdbarch_deprecated_target_read_fp (gdbarch, v850_target_read_fp);
-
- /*
- * Frame Info
- */
- set_gdbarch_deprecated_frame_init_saved_regs (gdbarch, v850_frame_init_saved_regs);
- set_gdbarch_deprecated_init_extra_frame_info (gdbarch, v850_init_extra_frame_info);
- set_gdbarch_deprecated_frame_chain (gdbarch, v850_frame_chain);
- set_gdbarch_deprecated_saved_pc_after_call (gdbarch, v850_saved_pc_after_call);
- set_gdbarch_deprecated_frame_saved_pc (gdbarch, v850_frame_saved_pc);
- set_gdbarch_skip_prologue (gdbarch, v850_skip_prologue);
-
- /*
- * Miscelany
- */
- /* Stack grows up. */
- set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
-
- /*
- * Call Dummies
- *
- * These values and methods are used when gdb calls a target function. */
- set_gdbarch_deprecated_push_return_address (gdbarch, v850_push_return_address);
- set_gdbarch_deprecated_extract_return_value (gdbarch, v850_extract_return_value);
- set_gdbarch_deprecated_push_arguments (gdbarch, v850_push_arguments);
- set_gdbarch_deprecated_pop_frame (gdbarch, v850_pop_frame);
- set_gdbarch_deprecated_store_struct_return (gdbarch, v850_store_struct_return);
- set_gdbarch_deprecated_store_return_value (gdbarch, v850_store_return_value);
- set_gdbarch_deprecated_use_struct_convention (gdbarch, v850_use_struct_convention);
- set_gdbarch_breakpoint_from_pc (gdbarch, v850_breakpoint_from_pc);
-
- set_gdbarch_int_bit (gdbarch, 4 * TARGET_CHAR_BIT);
- set_gdbarch_ptr_bit (gdbarch, 4 * TARGET_CHAR_BIT);
- set_gdbarch_addr_bit (gdbarch, 4 * TARGET_CHAR_BIT);
- set_gdbarch_long_double_bit (gdbarch, 8 * TARGET_CHAR_BIT);
-
- /* Should be using push_dummy_call. */
- set_gdbarch_deprecated_dummy_write_sp (gdbarch, deprecated_write_sp);
-
- set_gdbarch_print_insn (gdbarch, print_insn_v850);
-
- return gdbarch;
-}
-
-extern initialize_file_ftype _initialize_v850_tdep; /* -Wmissing-prototypes */
-
-void
-_initialize_v850_tdep (void)
-{
- register_gdbarch_init (bfd_arch_v850, v850_gdbarch_init);
-}
generated by cgit v1.1 at 2024-12-29 14:00:29 +0000