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Diffstat (limited to 'gdb/alpha-tdep.h')
| -rw-r--r-- | gdb/alpha-tdep.h | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/gdb/alpha-tdep.h b/gdb/alpha-tdep.h new file mode 100644 index 0000000..c3ee007 --- /dev/null +++ b/gdb/alpha-tdep.h @@ -0,0 +1,125 @@ +/* Common target dependent code for GDB on Alpha systems. + Copyright 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2002 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 2 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, write to the Free Software + Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#ifndef ALPHA_TDEP_H +#define ALPHA_TDEP_H + +/* Say how long (ordinary) registers are. This is a piece of bogosity + used in push_word and a few other places; REGISTER_RAW_SIZE is the + real way to know how big a register is. */ +#define ALPHA_REGISTER_SIZE 8 + +/* Number of machine registers. */ +#define ALPHA_NUM_REGS 66 + +/* Total amount of space needed to store our copies of the machine's + register state. */ +#define ALPHA_REGISTER_BYTES (ALPHA_NUM_REGS * 8) + +/* Largest value REGISTER_RAW_SIZE can have. */ +#define ALPHA_MAX_REGISTER_RAW_SIZE 8 + +/* Largest value REGISTER_VIRTUAL_SIZE can have. */ +#define ALPHA_MAX_REGISTER_VIRTUAL_SIZE 8 + +/* Register numbers of various important registers. + Note that most of these values are "real" register numbers, + and correspond to the general registers of the machine, + and FP_REGNUM is a "phony" register number which is too large + to be an actual register number as far as the user is concerned + but serves to get the desired value when passed to read_register. */ + +#define ALPHA_V0_REGNUM 0 /* Function integer return value */ +#define ALPHA_T7_REGNUM 8 /* Return address register for OSF/1 __add* */ +#define ALPHA_GCC_FP_REGNUM 15 /* Used by gcc as frame register */ +#define ALPHA_A0_REGNUM 16 /* Loc of first arg during a subr call */ +#define ALPHA_T9_REGNUM 23 /* Return address register for OSF/1 __div* */ +#define ALPHA_T12_REGNUM 27 /* Contains start addr of current proc */ +#define ALPHA_SP_REGNUM 30 /* Contains address of top of stack */ +#define ALPHA_RA_REGNUM 26 /* Contains return address value */ +#define ALPHA_ZERO_REGNUM 31 /* Read-only register, always 0 */ +#define ALPHA_FP0_REGNUM 32 /* Floating point register 0 */ +#define ALPHA_FPA0_REGNUM 48 /* First float arg during a subr call */ +#define ALPHA_FPCR_REGNUM 63 /* Floating point control register */ +#define ALPHA_PC_REGNUM 64 /* Contains program counter */ +#define ALPHA_FP_REGNUM 65 /* Virtual frame pointer */ + +/* The alpha has two different virtual pointers for arguments and locals. + + The virtual argument pointer is pointing to the bottom of the argument + transfer area, which is located immediately below the virtual frame + pointer. Its size is fixed for the native compiler, it is either zero + (for the no arguments case) or large enough to hold all argument registers. + gcc uses a variable sized argument transfer area. As it has + to stay compatible with the native debugging tools it has to use the same + virtual argument pointer and adjust the argument offsets accordingly. + + The virtual local pointer is localoff bytes below the virtual frame + pointer, the value of localoff is obtained from the PDR. */ +#define ALPHA_NUM_ARG_REGS 6 + +/* ABI variants that we know about. If you add to this enum, please + update the table of names in alpha-tdep.c. */ +enum alpha_abi +{ + ALPHA_ABI_UNKNOWN = 0, + ALPHA_ABI_OSF1, + ALPHA_ABI_LINUX, + ALPHA_ABI_FREEBSD, + ALPHA_ABI_NETBSD, + + ALPHA_ABI_INVALID /* Keep this last. */ +}; + +/* Target-dependent structure in gdbarch. */ +struct gdbarch_tdep +{ + enum alpha_abi alpha_abi; /* OS/ABI of inferior. */ + const char *abi_name; /* Name of the above. */ + + CORE_ADDR vm_min_address; /* used by heuristic_proc_start */ + + /* If PC is inside a dynamically-generated signal trampoline function + (i.e. one copied onto the user stack at run-time), return how many + bytes PC is beyond the start of that function. Otherwise, return -1. */ + LONGEST (*dynamic_sigtramp_offset) (CORE_ADDR); + + /* If FRAME refers to a sigtramp frame, return the address of the next + frame. */ + CORE_ADDR (*skip_sigtramp_frame) (struct frame_info *, CORE_ADDR); + + /* Translate a signal handler frame into the address of the sigcontext + structure for that signal handler. */ + CORE_ADDR (*sigcontext_addr) (struct frame_info *); + + int jb_pc; /* Offset to PC value in jump buffer. + If htis is negative, longjmp support + will be disabled. */ + size_t jb_elt_size; /* And the size of each entry in the buf. */ +}; + +void alpha_software_single_step (enum target_signal, int); + +void alpha_gdbarch_register_os_abi (enum alpha_abi, + void (*init_abi)(struct gdbarch_info, + struct gdbarch *)); + +#endif /* ALPHA_TDEP_H */ |