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Diffstat (limited to 'gdb/z8k-tdep.c')
| -rw-r--r-- | gdb/z8k-tdep.c | 430 |
1 files changed, 0 insertions, 430 deletions
diff --git a/gdb/z8k-tdep.c b/gdb/z8k-tdep.c deleted file mode 100644 index c7396e2..0000000 --- a/gdb/z8k-tdep.c +++ /dev/null @@ -1,430 +0,0 @@ -/* Target-machine dependent code for Zilog Z8000, for GDB. - - Copyright 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001, - 2002 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. */ - -/* - Contributed by Steve Chamberlain - sac@cygnus.com - */ - -#include "defs.h" -#include "frame.h" -#include "symtab.h" -#include "gdbcmd.h" -#include "gdbtypes.h" -#include "dis-asm.h" -#include "gdbcore.h" -#include "regcache.h" - -#include "value.h" /* For read_register() */ - - -static int read_memory_pointer (CORE_ADDR x); - -/* Return the saved PC from this frame. - - If the frame has a memory copy of SRP_REGNUM, use that. If not, - just use the register SRP_REGNUM itself. */ - -CORE_ADDR -z8k_frame_saved_pc (struct frame_info *frame) -{ - return read_memory_pointer (frame->frame + (BIG ? 4 : 2)); -} - -#define IS_PUSHL(x) (BIG ? ((x & 0xfff0) == 0x91e0):((x & 0xfff0) == 0x91F0)) -#define IS_PUSHW(x) (BIG ? ((x & 0xfff0) == 0x93e0):((x & 0xfff0)==0x93f0)) -#define IS_MOVE_FP(x) (BIG ? x == 0xa1ea : x == 0xa1fa) -#define IS_MOV_SP_FP(x) (BIG ? x == 0x94ea : x == 0x0d76) -#define IS_SUB2_SP(x) (x==0x1b87) -#define IS_MOVK_R5(x) (x==0x7905) -#define IS_SUB_SP(x) ((x & 0xffff) == 0x020f) -#define IS_PUSH_FP(x) (BIG ? (x == 0x93ea) : (x == 0x93fa)) - -/* work out how much local space is on the stack and - return the pc pointing to the first push */ - -static CORE_ADDR -skip_adjust (CORE_ADDR pc, int *size) -{ - *size = 0; - - if (IS_PUSH_FP (read_memory_short (pc)) - && IS_MOV_SP_FP (read_memory_short (pc + 2))) - { - /* This is a function with an explict frame pointer */ - pc += 4; - *size += 2; /* remember the frame pointer */ - } - - /* remember any stack adjustment */ - if (IS_SUB_SP (read_memory_short (pc))) - { - *size += read_memory_short (pc + 2); - pc += 4; - } - return pc; -} - -static CORE_ADDR examine_frame (CORE_ADDR, CORE_ADDR * regs, CORE_ADDR); -static CORE_ADDR -examine_frame (CORE_ADDR pc, CORE_ADDR *regs, CORE_ADDR sp) -{ - int w = read_memory_short (pc); - int offset = 0; - int regno; - - for (regno = 0; regno < NUM_REGS; regno++) - regs[regno] = 0; - - while (IS_PUSHW (w) || IS_PUSHL (w)) - { - /* work out which register is being pushed to where */ - if (IS_PUSHL (w)) - { - regs[w & 0xf] = offset; - regs[(w & 0xf) + 1] = offset + 2; - offset += 4; - } - else - { - regs[w & 0xf] = offset; - offset += 2; - } - pc += 2; - w = read_memory_short (pc); - } - - if (IS_MOVE_FP (w)) - { - /* We know the fp */ - - } - else if (IS_SUB_SP (w)) - { - /* Subtracting a value from the sp, so were in a function - which needs stack space for locals, but has no fp. We fake up - the values as if we had an fp */ - regs[FP_REGNUM] = sp; - } - else - { - /* This one didn't have an fp, we'll fake it up */ - regs[SP_REGNUM] = sp; - } - /* stack pointer contains address of next frame */ - /* regs[fp_regnum()] = fp; */ - regs[SP_REGNUM] = sp; - return pc; -} - -CORE_ADDR -z8k_skip_prologue (CORE_ADDR start_pc) -{ - CORE_ADDR dummy[NUM_REGS]; - - return examine_frame (start_pc, dummy, 0); -} - -CORE_ADDR -z8k_addr_bits_remove (CORE_ADDR addr) -{ - return (addr & PTR_MASK); -} - -static int -read_memory_pointer (CORE_ADDR x) -{ - return read_memory_integer (ADDR_BITS_REMOVE (x), BIG ? 4 : 2); -} - -CORE_ADDR -z8k_frame_chain (struct frame_info *thisframe) -{ - if (!inside_entry_file (thisframe->pc)) - { - return read_memory_pointer (thisframe->frame); - } - return 0; -} - -void -init_frame_pc (void) -{ - internal_error (__FILE__, __LINE__, "failed internal consistency check"); -} - -/* Put here the code to store, into a struct frame_saved_regs, - the addresses of the saved registers of frame described by FRAME_INFO. - This includes special registers such as pc and fp saved in special - ways in the stack frame. sp is even more special: - the address we return for it IS the sp for the next frame. */ - -void -z8k_frame_init_saved_regs (struct frame_info *frame_info) -{ - CORE_ADDR pc; - int w; - - frame_saved_regs_zalloc (frame_info); - pc = get_pc_function_start (frame_info->pc); - - /* wander down the instruction stream */ - examine_frame (pc, frame_info->saved_regs, frame_info->frame); - -} - -void -z8k_push_dummy_frame (void) -{ - internal_error (__FILE__, __LINE__, "failed internal consistency check"); -} - -int -gdb_print_insn_z8k (bfd_vma memaddr, disassemble_info *info) -{ - if (BIG) - return print_insn_z8001 (memaddr, info); - else - return print_insn_z8002 (memaddr, info); -} - -/* Fetch the instruction at ADDR, returning 0 if ADDR is beyond LIM or - is not the address of a valid instruction, the address of the next - instruction beyond ADDR otherwise. *PWORD1 receives the first word - of the instruction. */ - -CORE_ADDR -NEXT_PROLOGUE_INSN (CORE_ADDR addr, CORE_ADDR lim, short *pword1) -{ - char buf[2]; - if (addr < lim + 8) - { - read_memory (addr, buf, 2); - *pword1 = extract_signed_integer (buf, 2); - - return addr + 2; - } - return 0; -} - -#if 0 -/* Put here the code to store, into a struct frame_saved_regs, - the addresses of the saved registers of frame described by FRAME_INFO. - This includes special registers such as pc and fp saved in special - ways in the stack frame. sp is even more special: - the address we return for it IS the sp for the next frame. - - We cache the result of doing this in the frame_cache_obstack, since - it is fairly expensive. */ - -void -frame_find_saved_regs (struct frame_info *fip, struct frame_saved_regs *fsrp) -{ - int locals; - CORE_ADDR pc; - CORE_ADDR adr; - int i; - - memset (fsrp, 0, sizeof *fsrp); - - pc = skip_adjust (get_pc_function_start (fip->pc), &locals); - - { - adr = FRAME_FP (fip) - locals; - for (i = 0; i < 8; i++) - { - int word = read_memory_short (pc); - - pc += 2; - if (IS_PUSHL (word)) - { - fsrp->regs[word & 0xf] = adr; - fsrp->regs[(word & 0xf) + 1] = adr - 2; - adr -= 4; - } - else if (IS_PUSHW (word)) - { - fsrp->regs[word & 0xf] = adr; - adr -= 2; - } - else - break; - } - - } - - fsrp->regs[PC_REGNUM] = fip->frame + 4; - fsrp->regs[FP_REGNUM] = fip->frame; - -} -#endif - -int -z8k_saved_pc_after_call (struct frame_info *frame) -{ - return ADDR_BITS_REMOVE - (read_memory_integer (read_register (SP_REGNUM), PTR_SIZE)); -} - - -void -extract_return_value (struct type *type, char *regbuf, char *valbuf) -{ - int b; - int len = TYPE_LENGTH (type); - - for (b = 0; b < len; b += 2) - { - int todo = len - b; - - if (todo > 2) - todo = 2; - memcpy (valbuf + b, regbuf + b, todo); - } -} - -void -write_return_value (struct type *type, char *valbuf) -{ - int reg; - int len; - - for (len = 0; len < TYPE_LENGTH (type); len += 2) - write_register_bytes (REGISTER_BYTE (len / 2 + 2), valbuf + len, 2); -} - -void -store_struct_return (CORE_ADDR addr, CORE_ADDR sp) -{ - write_register (2, addr); -} - - -void -z8k_print_register_hook (int regno) -{ - if ((regno & 1) == 0 && regno < 16) - { - unsigned char l[4]; - - frame_register_read (selected_frame, regno, l + 0); - frame_register_read (selected_frame, regno + 1, l + 2); - printf_unfiltered ("\t"); - printf_unfiltered ("0x%02x%02x%02x%02x", l[0], l[1], l[2], l[3]); - } - - if ((regno & 3) == 0 && regno < 16) - { - unsigned char l[8]; - - frame_register_read (selected_frame, regno, l + 0); - frame_register_read (selected_frame, regno + 1, l + 2); - frame_register_read (selected_frame, regno + 2, l + 4); - frame_register_read (selected_frame, regno + 3, l + 6); - - printf_unfiltered ("\t"); - printf_unfiltered ("0x%02x%02x%02x%02x%02x%02x%02x%02x", - l[0], l[1], l[2], l[3], l[4], l[5], l[6], l[7]); - } - if (regno == 15) - { - unsigned short rval; - int i; - - frame_register_read (selected_frame, regno, (char *) (&rval)); - - printf_unfiltered ("\n"); - for (i = 0; i < 10; i += 2) - { - printf_unfiltered ("(sp+%d=%04x)", i, - (unsigned int)read_memory_short (rval + i)); - } - } - -} - -void -z8k_pop_frame (void) -{ -} - -struct cmd_list_element *setmemorylist; - -void -z8k_set_pointer_size (int newsize) -{ - static int oldsize = 0; - - if (oldsize != newsize) - { - printf_unfiltered ("pointer size set to %d bits\n", newsize); - oldsize = newsize; - if (newsize == 32) - { - BIG = 1; - } - else - { - BIG = 0; - } - /* FIXME: This code should be using the GDBARCH framework to - handle changed type sizes. If this problem is ever fixed - (the direct reference to _initialize_gdbtypes() below - eliminated) then Makefile.in should be updated so that - z8k-tdep.c is again compiled with -Werror. */ - _initialize_gdbtypes (); - } -} - -static void -segmented_command (char *args, int from_tty) -{ - z8k_set_pointer_size (32); -} - -static void -unsegmented_command (char *args, int from_tty) -{ - z8k_set_pointer_size (16); -} - -static void -set_memory (char *args, int from_tty) -{ - printf_unfiltered ("\"set memory\" must be followed by the name of a memory subcommand.\n"); - help_list (setmemorylist, "set memory ", -1, gdb_stdout); -} - -void -_initialize_z8ktdep (void) -{ - tm_print_insn = gdb_print_insn_z8k; - - add_prefix_cmd ("memory", no_class, set_memory, - "set the memory model", &setmemorylist, "set memory ", 0, - &setlist); - add_cmd ("segmented", class_support, segmented_command, - "Set segmented memory model.", &setmemorylist); - add_cmd ("unsegmented", class_support, unsegmented_command, - "Set unsegmented memory model.", &setmemorylist); - -} |