gdb/config/sparc/tm-sparclet.h

   1 /* Target machine definitions for GDB for an embedded SPARC.
   2    Copyright 1996 Free Software Foundation, Inc.
   3
   4 This file is part of GDB.
   5
   6 This program is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2 of the License, or
   9 (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with this program; if not, write to the Free Software
  18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  19
  20 #include "sparc/tm-sparc.h"
  21
  22 #define TARGET_SPARCLET 1
  23
  24 /* Select the sparclet disassembler.  Slightly different instruction set from
  25    the V8 sparc.  */
  26
  27 #undef TM_PRINT_INSN_MACH
  28 #define TM_PRINT_INSN_MACH bfd_mach_sparc_sparclet
  29
  30 /* overrides of tm-sparc.h */
  31
  32 #undef TARGET_BYTE_ORDER
  33 #define TARGET_BYTE_ORDER_SELECTABLE
  34
  35 /* Sequence of bytes for breakpoint instruction (ta 1). */
  36 #undef BREAKPOINT
  37 #define BIG_BREAKPOINT {0x91, 0xd0, 0x20, 0x01}
  38 #define LITTLE_BREAKPOINT {0x01, 0x20, 0xd0, 0x91}
  39
  40 #undef  NUM_REGS /* formerly "72" */
  41 /*                WIN  FP   CPU  CCP  ASR  AWR  APSR */
  42 #define NUM_REGS (32 + 32 + 8  + 8  + 8/*+ 32 + 1*/)
  43
  44 #undef  REGISTER_BYTES /* formerly "(32*4 + 32*4 + 8*4)" */
  45 #define REGISTER_BYTES (32*4 + 32*4 + 8*4 + 8*4 + 8*4/* + 32*4 + 1*4*/)
  46
  47 /* Initializer for an array of names of registers.
  48    There should be NUM_REGS strings in this initializer.  */
  49 /* Sparclet has no fp! */
  50 /* Compiler maps types for floats by number, so can't
  51    change the numbers here. */
  52
  53 #undef REGISTER_NAMES
  54 #define REGISTER_NAMES  \
  55 { "g0", "g1", "g2", "g3", "g4", "g5", "g6", "g7",       \
  56   "o0", "o1", "o2", "o3", "o4", "o5", "o6", "o7",       \
  57   "l0", "l1", "l2", "l3", "l4", "l5", "l6", "l7",       \
  58   "i0", "i1", "i2", "i3", "i4", "i5", "i6", "i7",       \
  59                                                         \
  60   "", "", "", "", "", "", "", "", /* no FPU regs */     \
  61   "", "", "", "", "", "", "", "",                       \
  62   "", "", "", "", "", "", "", "",                       \
  63   "", "", "", "", "", "", "", "",                       \
  64                                   /* no CPSR, FPSR */   \
  65   "y", "psr", "wim", "tbr", "pc", "npc", "", "",        \
  66                                                         \
  67   "ccsr", "ccpr", "cccrcr", "ccor", "ccobr", "ccibr", "ccir", "", \
  68                                                                   \
  69   "asr1",  "asr15", "asr17", "asr18", "asr19", "asr20", "asr21", "asr22", \
  70 /*                                                                        \
  71   "awr0",  "awr1",  "awr2",  "awr3",  "awr4",  "awr5",  "awr6",  "awr7",  \
  72   "awr8",  "awr9",  "awr10", "awr11", "awr12", "awr13", "awr14", "awr15", \
  73   "awr16", "awr17", "awr18", "awr19", "awr20", "awr21", "awr22", "awr23", \
  74   "awr24", "awr25", "awr26", "awr27", "awr28", "awr29", "awr30", "awr31", \
  75   "apsr",                                                                 \
  76  */                                                                       \
  77 }
  78
  79 /* Remove FP dependant code which was defined in tm-sparc.h */
  80 #undef  FP0_REGNUM /* Floating point register 0 */
  81 #undef  FPS_REGNUM /* Floating point status register */
  82 #undef  CPS_REGNUM /* Coprocessor status register */
  83
  84 /* sparclet register numbers */
  85 #define CCSR_REGNUM 72
  86
  87 #undef EXTRACT_RETURN_VALUE
  88 #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF)                       \
  89   {                                                                    \
  90     memcpy ((VALBUF),                                                  \
  91             (char *)(REGBUF) + REGISTER_RAW_SIZE (O0_REGNUM) * 8 +     \
  92             (TYPE_LENGTH(TYPE) >= REGISTER_RAW_SIZE (O0_REGNUM)        \
  93              ? 0 : REGISTER_RAW_SIZE (O0_REGNUM) - TYPE_LENGTH(TYPE)), \
  94             TYPE_LENGTH(TYPE));                                        \
  95   }
  96 #undef STORE_RETURN_VALUE
  97 #define STORE_RETURN_VALUE(TYPE,VALBUF) \
  98   {                                                                    \
  99     /* Other values are returned in register %o0.  */                  \
 100     write_register_bytes (REGISTER_BYTE (O0_REGNUM), (VALBUF),         \
 101                           TYPE_LENGTH (TYPE));                         \
 102   }
 103
 104 #undef PRINT_REGISTER_HOOK
 105 #define PRINT_REGISTER_HOOK(regno)
 106
 107 /* Override the standard gdb prompt when compiled for this target.  */
 108
 109 #define DEFAULT_PROMPT  "(gdbslet) "
 110
 111 /* Offsets into jmp_buf.  Not defined by Sun, but at least documented in a
 112    comment in <machine/setjmp.h>! */
 113
 114 #define JB_ELEMENT_SIZE 4       /* Size of each element in jmp_buf */
 115
 116 #define JB_ONSSTACK 0
 117 #define JB_SIGMASK 1
 118 #define JB_SP 2
 119 #define JB_PC 3
 120 #define JB_NPC 4
 121 #define JB_PSR 5
 122 #define JB_G1 6
 123 #define JB_O0 7
 124 #define JB_WBCNT 8
 125
 126 /* Figure out where the longjmp will land.  We expect that we have just entered
 127    longjmp and haven't yet setup the stack frame, so the args are still in the
 128    output regs.  %o0 (O0_REGNUM) points at the jmp_buf structure from which we
 129    extract the pc (JB_PC) that we will land at.  The pc is copied into ADDR.
 130    This routine returns true on success */
 131
 132 extern int
 133 get_longjmp_target PARAMS ((CORE_ADDR *));
 134
 135 #define GET_LONGJMP_TARGET(ADDR) get_longjmp_target(ADDR)