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- /* Target-dependent code for the HP PA-RISC architecture.
- Copyright (C) 2003-2022 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 so_list;
- /* 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
- {
- /* 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) (struct frame_info *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) (struct so_list *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 (struct frame_info *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,
- struct frame_info *next_frame);
- extern struct bound_minimal_symbol
- hppa_lookup_stub_minimal_symbol (const char *name,
- enum unwind_stub_types stub_type);
- extern int hppa_in_solib_call_trampoline (struct gdbarch *gdbarch,
- CORE_ADDR pc);
- extern CORE_ADDR hppa_skip_trampoline_code (struct frame_info *, CORE_ADDR pc);
- #endif /* hppa-tdep.h */
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