| /* Target-dependent code for the HP PA-RISC architecture. |
| |
| Copyright (C) 2003-2024 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 3 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, see <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef HPPA_TDEP_H |
| #define HPPA_TDEP_H |
| |
| #include "gdbarch.h" |
| |
| struct trad_frame_saved_reg; |
| struct objfile; |
| struct solib; |
| |
| /* Register numbers of various important registers. */ |
| |
| enum hppa_regnum |
| { |
| HPPA_R0_REGNUM = 0, /* Doesn't actually exist, used as base for |
| other r registers. */ |
| HPPA_R1_REGNUM = 1, |
| HPPA_FLAGS_REGNUM = 0, /* Various status flags */ |
| HPPA_RP_REGNUM = 2, /* return pointer */ |
| HPPA_FP_REGNUM = 3, /* The ABI's frame pointer, when used */ |
| HPPA_DP_REGNUM = 27, |
| HPPA_RET0_REGNUM = 28, |
| HPPA_RET1_REGNUM = 29, |
| HPPA_SP_REGNUM = 30, /* Stack pointer. */ |
| HPPA_R31_REGNUM = 31, |
| HPPA_SAR_REGNUM = 32, /* Shift Amount Register */ |
| HPPA_IPSW_REGNUM = 41, /* Interrupt Processor Status Word */ |
| HPPA_PCOQ_HEAD_REGNUM = 33, /* instruction offset queue head */ |
| HPPA_PCSQ_HEAD_REGNUM = 34, /* instruction space queue head */ |
| HPPA_PCOQ_TAIL_REGNUM = 35, /* instruction offset queue tail */ |
| HPPA_PCSQ_TAIL_REGNUM = 36, /* instruction space queue tail */ |
| HPPA_EIEM_REGNUM = 37, /* External Interrupt Enable Mask */ |
| HPPA_IIR_REGNUM = 38, /* Interrupt Instruction Register */ |
| HPPA_ISR_REGNUM = 39, /* Interrupt Space Register */ |
| HPPA_IOR_REGNUM = 40, /* Interrupt Offset Register */ |
| HPPA_SR4_REGNUM = 43, /* space register 4 */ |
| HPPA_SR0_REGNUM = 44, /* space register 0 */ |
| HPPA_SR1_REGNUM = 45, /* space register 1 */ |
| HPPA_SR2_REGNUM = 46, /* space register 2 */ |
| HPPA_SR3_REGNUM = 47, /* space register 3 */ |
| HPPA_SR5_REGNUM = 48, /* space register 5 */ |
| HPPA_SR6_REGNUM = 49, /* space register 6 */ |
| HPPA_SR7_REGNUM = 50, /* space register 7 */ |
| HPPA_RCR_REGNUM = 51, /* Recover Counter (also known as cr0) */ |
| HPPA_PID0_REGNUM = 52, /* Protection ID */ |
| HPPA_PID1_REGNUM = 53, /* Protection ID */ |
| HPPA_PID2_REGNUM = 55, /* Protection ID */ |
| HPPA_PID3_REGNUM = 56, /* Protection ID */ |
| HPPA_CCR_REGNUM = 54, /* Coprocessor Configuration Register */ |
| HPPA_TR0_REGNUM = 57, /* Temporary Registers (cr24 -> cr31) */ |
| HPPA_CR26_REGNUM = 59, |
| HPPA_CR27_REGNUM = 60, /* Base register for thread-local |
| storage, cr27 */ |
| HPPA_FP0_REGNUM = 64, /* First floating-point. */ |
| HPPA_FP4_REGNUM = 72, |
| HPPA64_FP4_REGNUM = 68, |
| HPPA_FP31R_REGNUM = 127, /* Last floating-point. */ |
| |
| HPPA_ARG0_REGNUM = 26, /* The first argument of a callee. */ |
| HPPA_ARG1_REGNUM = 25, /* The second argument of a callee. */ |
| HPPA_ARG2_REGNUM = 24, /* The third argument of a callee. */ |
| HPPA_ARG3_REGNUM = 23 /* The fourth argument of a callee. */ |
| }; |
| |
| /* Instruction size. */ |
| #define HPPA_INSN_SIZE 4 |
| |
| /* Target-dependent structure in gdbarch. */ |
| struct hppa_gdbarch_tdep : gdbarch_tdep_base |
| { |
| /* The number of bytes in an address. For now, this field is designed |
| to allow us to differentiate hppa32 from hppa64 targets. */ |
| int bytes_per_address = 0; |
| |
| /* Is this an ELF target? This can be 64-bit HP-UX, or a 32/64-bit GNU/Linux |
| system. */ |
| int is_elf = 0; |
| |
| /* Given a function address, try to find the global pointer for the |
| corresponding shared object. */ |
| CORE_ADDR (*find_global_pointer) (struct gdbarch *, struct value *) = nullptr; |
| |
| /* For shared libraries, each call goes through a small piece of |
| trampoline code in the ".plt" section. IN_SOLIB_CALL_TRAMPOLINE |
| evaluates to nonzero if we are currently stopped in one of these. */ |
| int (*in_solib_call_trampoline) (struct gdbarch *gdbarch, |
| CORE_ADDR pc) = nullptr; |
| |
| /* For targets that support multiple spaces, we may have additional stubs |
| in the return path. These stubs are internal to the ABI, and users are |
| not interested in them. If we detect that we are returning to a stub, |
| adjust the pc to the real caller. This improves the behavior of commands |
| that traverse frames such as "up" and "finish". */ |
| void (*unwind_adjust_stub) (const frame_info_ptr &this_frame, CORE_ADDR base, |
| trad_frame_saved_reg *saved_regs) = nullptr; |
| |
| /* These are solib-dependent methods. They are really HPUX only, but |
| we don't have a HPUX-specific tdep vector at the moment. */ |
| CORE_ADDR (*solib_thread_start_addr) (solib *so) = nullptr; |
| CORE_ADDR (*solib_get_got_by_pc) (CORE_ADDR addr) = nullptr; |
| CORE_ADDR (*solib_get_solib_by_pc) (CORE_ADDR addr) = nullptr; |
| CORE_ADDR (*solib_get_text_base) (struct objfile *objfile) = nullptr; |
| }; |
| |
| /* |
| * Unwind table and descriptor. |
| */ |
| |
| struct unwind_table_entry |
| { |
| CORE_ADDR region_start; |
| CORE_ADDR region_end; |
| |
| unsigned int Cannot_unwind:1; /* 0 */ |
| unsigned int Millicode:1; /* 1 */ |
| unsigned int Millicode_save_sr0:1; /* 2 */ |
| unsigned int Region_description:2; /* 3..4 */ |
| unsigned int reserved:1; /* 5 */ |
| unsigned int Entry_SR:1; /* 6 */ |
| unsigned int Entry_FR:4; /* number saved *//* 7..10 */ |
| unsigned int Entry_GR:5; /* number saved *//* 11..15 */ |
| unsigned int Args_stored:1; /* 16 */ |
| unsigned int Variable_Frame:1; /* 17 */ |
| unsigned int Separate_Package_Body:1; /* 18 */ |
| unsigned int Frame_Extension_Millicode:1; /* 19 */ |
| unsigned int Stack_Overflow_Check:1; /* 20 */ |
| unsigned int Two_Instruction_SP_Increment:1; /* 21 */ |
| unsigned int sr4export:1; /* 22 */ |
| unsigned int cxx_info:1; /* 23 */ |
| unsigned int cxx_try_catch:1; /* 24 */ |
| unsigned int sched_entry_seq:1; /* 25 */ |
| unsigned int reserved1:1; /* 26 */ |
| unsigned int Save_SP:1; /* 27 */ |
| unsigned int Save_RP:1; /* 28 */ |
| unsigned int Save_MRP_in_frame:1; /* 29 */ |
| unsigned int save_r19:1; /* 30 */ |
| unsigned int Cleanup_defined:1; /* 31 */ |
| |
| unsigned int MPE_XL_interrupt_marker:1; /* 0 */ |
| unsigned int HP_UX_interrupt_marker:1; /* 1 */ |
| unsigned int Large_frame:1; /* 2 */ |
| unsigned int alloca_frame:1; /* 3 */ |
| unsigned int reserved2:1; /* 4 */ |
| unsigned int Total_frame_size:27; /* 5..31 */ |
| |
| /* This is *NOT* part of an actual unwind_descriptor in an object |
| file. It is *ONLY* part of the "internalized" descriptors that |
| we create from those in a file. */ |
| |
| struct |
| { |
| unsigned int stub_type:4; /* 0..3 */ |
| unsigned int padding:28; /* 4..31 */ |
| } |
| stub_unwind; |
| }; |
| |
| /* HP linkers also generate unwinds for various linker-generated stubs. |
| GDB reads in the stubs from the $UNWIND_END$ subspace, then |
| "converts" them into normal unwind entries using some of the reserved |
| fields to store the stub type. */ |
| |
| /* The gaps represent linker stubs used in MPE and space for future |
| expansion. */ |
| enum unwind_stub_types |
| { |
| LONG_BRANCH = 1, |
| PARAMETER_RELOCATION = 2, |
| EXPORT = 10, |
| IMPORT = 11, |
| IMPORT_SHLIB = 12, |
| }; |
| |
| struct unwind_table_entry *find_unwind_entry (CORE_ADDR); |
| |
| int hppa_get_field (unsigned word, int from, int to); |
| int hppa_extract_5_load (unsigned int); |
| unsigned hppa_extract_5R_store (unsigned int); |
| unsigned hppa_extract_5r_store (unsigned int); |
| int hppa_extract_17 (unsigned int); |
| int hppa_extract_21 (unsigned); |
| int hppa_extract_14 (unsigned); |
| CORE_ADDR hppa_symbol_address(const char *sym); |
| |
| extern struct value * |
| hppa_frame_prev_register_helper (const frame_info_ptr &this_frame, |
| trad_frame_saved_reg *saved_regs, |
| int regnum); |
| |
| extern CORE_ADDR hppa_read_pc (struct regcache *regcache); |
| extern void hppa_write_pc (struct regcache *regcache, CORE_ADDR pc); |
| extern CORE_ADDR hppa_unwind_pc (struct gdbarch *gdbarch, |
| const frame_info_ptr &next_frame); |
| |
| extern int hppa_in_solib_call_trampoline (struct gdbarch *gdbarch, |
| CORE_ADDR pc); |
| extern CORE_ADDR hppa_skip_trampoline_code (const frame_info_ptr &, CORE_ADDR pc); |
| |
| #endif /* hppa-tdep.h */ |