1 /* Target-dependent header for the MIPS architecture, for GDB, the GNU Debugger.
3 Copyright (C) 2002-2019 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
27 /* All the possible MIPS ABIs. */
40 /* Return the MIPS ABI associated with GDBARCH. */
41 enum mips_abi mips_abi (struct gdbarch *gdbarch);
43 /* Base and compressed MIPS ISA variations. */
46 ISA_MIPS = -1, /* mips_compression_string depends on it. */
51 /* Corresponding MSYMBOL_TARGET_FLAG aliases. */
52 #define MSYMBOL_TARGET_FLAG_MIPS16 MSYMBOL_TARGET_FLAG_1
53 #define MSYMBOL_TARGET_FLAG_MICROMIPS MSYMBOL_TARGET_FLAG_2
55 /* Return the MIPS ISA's register size. Just a short cut to the BFD
56 architecture's word size. */
57 extern int mips_isa_regsize (struct gdbarch *gdbarch);
59 /* Return the current index for various MIPS registers. */
64 int fp_implementation_revision;
65 int fp_control_status;
66 int badvaddr; /* Bad vaddr for addressing exception. */
67 int cause; /* Describes last exception. */
68 int hi; /* Multiply/divide temp. */
70 int dspacc; /* SmartMIPS/DSP accumulators. */
71 int dspctl; /* DSP control. */
73 extern const struct mips_regnum *mips_regnum (struct gdbarch *gdbarch);
75 /* Some MIPS boards don't support floating point while others only
76 support single-precision floating-point operations. */
80 MIPS_FPU_DOUBLE, /* Full double precision floating point. */
81 MIPS_FPU_SINGLE, /* Single precision floating point (R4650). */
82 MIPS_FPU_NONE /* No floating point. */
85 /* MIPS specific per-architecture information. */
88 /* from the elf header */
92 enum mips_abi mips_abi;
93 enum mips_abi found_abi;
94 enum mips_isa mips_isa;
95 enum mips_fpu_type mips_fpu_type;
96 int mips_last_arg_regnum;
97 int mips_last_fp_arg_regnum;
98 int default_mask_address_p;
99 /* Is the target using 64-bit raw integer registers but only
100 storing a left-aligned 32-bit value in each? */
101 int mips64_transfers_32bit_regs_p;
102 /* Indexes for various registers. IRIX and embedded have
103 different values. This contains the "public" fields. Don't
104 add any that do not need to be public. */
105 const struct mips_regnum *regnum;
106 /* Register names table for the current register set. */
107 const char **mips_processor_reg_names;
109 /* The size of register data available from the target, if known.
110 This doesn't quite obsolete the manual
111 mips64_transfers_32bit_regs_p, since that is documented to force
112 left alignment even for big endian (very strange). */
113 int register_size_valid_p;
116 /* Return the expected next PC if FRAME is stopped at a syscall
118 CORE_ADDR (*syscall_next_pc) (struct frame_info *frame);
121 /* Register numbers of various important registers. */
125 MIPS_ZERO_REGNUM = 0, /* Read-only register, always 0. */
127 MIPS_V0_REGNUM = 2, /* Function integer return value. */
128 MIPS_A0_REGNUM = 4, /* Loc of first arg during a subr call. */
129 MIPS_S2_REGNUM = 18, /* Contains return address in MIPS16 thunks. */
130 MIPS_T9_REGNUM = 25, /* Contains address of callee in PIC. */
134 MIPS_PS_REGNUM = 32, /* Contains processor status. */
135 MIPS_EMBED_LO_REGNUM = 33,
136 MIPS_EMBED_HI_REGNUM = 34,
137 MIPS_EMBED_BADVADDR_REGNUM = 35,
138 MIPS_EMBED_CAUSE_REGNUM = 36,
139 MIPS_EMBED_PC_REGNUM = 37,
140 MIPS_EMBED_FP0_REGNUM = 38,
141 MIPS_UNUSED_REGNUM = 73, /* Never used, FIXME. */
142 MIPS_FIRST_EMBED_REGNUM = 74, /* First CP0 register for embedded use. */
143 MIPS_PRID_REGNUM = 89, /* Processor ID. */
144 MIPS_LAST_EMBED_REGNUM = 89 /* Last one. */
147 /* Instruction sizes and other useful constants. */
150 MIPS_INSN16_SIZE = 2,
151 MIPS_INSN32_SIZE = 4,
152 /* The number of floating-point or integer registers. */
156 /* Single step based on where the current instruction will take us. */
157 extern std::vector<CORE_ADDR> mips_software_single_step
158 (struct regcache *regcache);
160 /* Strip the ISA (compression) bit off from ADDR. */
161 extern CORE_ADDR mips_unmake_compact_addr (CORE_ADDR addr);
163 /* Tell if the program counter value in MEMADDR is in a standard
165 extern int mips_pc_is_mips (bfd_vma memaddr);
167 /* Tell if the program counter value in MEMADDR is in a MIPS16
169 extern int mips_pc_is_mips16 (struct gdbarch *gdbarch, bfd_vma memaddr);
171 /* Tell if the program counter value in MEMADDR is in a microMIPS
173 extern int mips_pc_is_micromips (struct gdbarch *gdbarch, bfd_vma memaddr);
175 /* Return the currently configured (or set) saved register size. */
176 extern unsigned int mips_abi_regsize (struct gdbarch *gdbarch);
178 /* Make PC the address of the next instruction to execute. */
179 extern void mips_write_pc (struct regcache *regcache, CORE_ADDR pc);
181 /* Target descriptions which only indicate the size of general
183 extern struct target_desc *mips_tdesc_gp32;
184 extern struct target_desc *mips_tdesc_gp64;
186 /* Return non-zero if PC is in a MIPS SVR4 lazy binding stub section. */
189 in_mips_stubs_section (CORE_ADDR pc)
191 return pc_in_section (pc, ".MIPS.stubs");
194 #endif /* MIPS_TDEP_H */