1 /* Common target dependent code for GDB on ARM systems.
2 Copyright (C) 2002, 2003, 2007 Free Software Foundation, Inc.
4 This file is part of GDB.
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 3 of the License, or
9 (at your option) any later version.
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.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 /* Forward declarations. */
26 /* Register numbers of various important registers. */
29 ARM_A1_REGNUM = 0, /* first integer-like argument */
30 ARM_A4_REGNUM = 3, /* last integer-like argument */
32 ARM_SP_REGNUM = 13, /* Contains address of top of stack */
33 ARM_LR_REGNUM = 14, /* address to return to from a function call */
34 ARM_PC_REGNUM = 15, /* Contains program counter */
35 ARM_F0_REGNUM = 16, /* first floating point register */
36 ARM_F3_REGNUM = 19, /* last floating point argument register */
37 ARM_F7_REGNUM = 23, /* last floating point register */
38 ARM_FPS_REGNUM = 24, /* floating point status register */
39 ARM_PS_REGNUM = 25, /* Contains processor status */
40 ARM_WR0_REGNUM, /* WMMX data registers. */
41 ARM_WR15_REGNUM = ARM_WR0_REGNUM + 15,
42 ARM_WC0_REGNUM, /* WMMX control registers. */
43 ARM_WCSSF_REGNUM = ARM_WC0_REGNUM + 2,
44 ARM_WCASF_REGNUM = ARM_WC0_REGNUM + 3,
45 ARM_WC7_REGNUM = ARM_WC0_REGNUM + 7,
46 ARM_WCGR0_REGNUM, /* WMMX general purpose registers. */
47 ARM_WCGR3_REGNUM = ARM_WCGR0_REGNUM + 3,
48 ARM_WCGR7_REGNUM = ARM_WCGR0_REGNUM + 7,
52 /* Other useful registers. */
53 ARM_FP_REGNUM = 11, /* Frame register in ARM code, if used. */
54 THUMB_FP_REGNUM = 7, /* Frame register in Thumb code, if used. */
56 ARM_LAST_ARG_REGNUM = ARM_A4_REGNUM,
57 ARM_NUM_FP_ARG_REGS = 4,
58 ARM_LAST_FP_ARG_REGNUM = ARM_F3_REGNUM
61 /* Size of integer registers. */
62 #define INT_REGISTER_SIZE 4
64 /* Say how long FP registers are. Used for documentation purposes and
65 code readability in this header. IEEE extended doubles are 80
66 bits. DWORD aligned they use 96 bits. */
67 #define FP_REGISTER_SIZE 12
69 /* Status registers are the same size as general purpose registers.
70 Used for documentation purposes and code readability in this
72 #define STATUS_REGISTER_SIZE 4
74 /* Number of machine registers. The only define actually required
75 is gdbarch_num_regs. The other definitions are used for documentation
76 purposes and code readability. */
77 /* For 26 bit ARM code, a fake copy of the PC is placed in register 25 (PS)
78 (and called PS for processor status) so the status bits can be cleared
79 from the PC (register 15). For 32 bit ARM code, a copy of CPSR is placed
81 #define NUM_FREGS 8 /* Number of floating point registers. */
82 #define NUM_SREGS 2 /* Number of status registers. */
83 #define NUM_GREGS 16 /* Number of general purpose registers. */
86 /* Instruction condition field values. */
104 #define FLAG_N 0x80000000
105 #define FLAG_Z 0x40000000
106 #define FLAG_C 0x20000000
107 #define FLAG_V 0x10000000
109 /* Type of floating-point code in use by inferior. There are really 3 models
110 that are traditionally supported (plus the endianness issue), but gcc can
111 only generate 2 of those. The third is APCS_FLOAT, where arguments to
112 functions are passed in floating-point registers.
114 In addition to the traditional models, VFP adds two more.
116 If you update this enum, don't forget to update fp_model_strings in
121 ARM_FLOAT_AUTO, /* Automatic detection. Do not set in tdep. */
122 ARM_FLOAT_SOFT_FPA, /* Traditional soft-float (mixed-endian on LE ARM). */
123 ARM_FLOAT_FPA, /* FPA co-processor. GCC calling convention. */
124 ARM_FLOAT_SOFT_VFP, /* Soft-float with pure-endian doubles. */
125 ARM_FLOAT_VFP, /* Full VFP calling convention. */
126 ARM_FLOAT_LAST /* Keep at end. */
129 /* ABI used by the inferior. */
138 /* Convention for returning structures. */
142 pcc_struct_return, /* Return "short" structures in memory. */
143 reg_struct_return /* Return "short" structures in registers. */
146 /* Target-dependent structure in gdbarch. */
149 /* The ABI for this architecture. It should never be set to
151 enum arm_abi_kind arm_abi;
153 enum arm_float_model fp_model; /* Floating point calling conventions. */
155 int have_fpa_registers; /* Does the target report the FPA registers? */
157 CORE_ADDR lowest_pc; /* Lowest address at which instructions
160 const char *arm_breakpoint; /* Breakpoint pattern for an ARM insn. */
161 int arm_breakpoint_size; /* And its size. */
162 const char *thumb_breakpoint; /* Breakpoint pattern for an ARM insn. */
163 int thumb_breakpoint_size; /* And its size. */
165 int jb_pc; /* Offset to PC value in jump buffer.
166 If this is negative, longjmp support
168 size_t jb_elt_size; /* And the size of each entry in the buf. */
170 /* Convention for returning structures. */
171 enum struct_return struct_return;
173 /* Cached core file helpers. */
174 struct regset *gregset, *fpregset;
180 #define LOWEST_PC (gdbarch_tdep (current_gdbarch)->lowest_pc)
183 CORE_ADDR arm_skip_stub (struct frame_info *, CORE_ADDR);
184 int arm_software_single_step (struct frame_info *);
186 /* Functions exported from armbsd-tdep.h. */
188 /* Return the appropriate register set for the core section identified
189 by SECT_NAME and SECT_SIZE. */
191 extern const struct regset *
192 armbsd_regset_from_core_section (struct gdbarch *gdbarch,
193 const char *sect_name, size_t sect_size);
195 #endif /* arm-tdep.h */