Commit | Line | Data |
---|---|---|
dc129d82 | 1 | /* Common target dependent code for GDB on Alpha systems. |
4be87837 | 2 | Copyright 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2002, 2003 Free |
dc129d82 JT |
3 | Software Foundation, Inc. |
4 | ||
5 | This file is part of GDB. | |
6 | ||
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 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
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. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
21 | ||
22 | #ifndef ALPHA_TDEP_H | |
23 | #define ALPHA_TDEP_H | |
24 | ||
25 | /* Say how long (ordinary) registers are. This is a piece of bogosity | |
12c266ea AC |
26 | used in push_word and a few other places; |
27 | DEPRECATED_REGISTER_RAW_SIZE is the real way to know how big a | |
28 | register is. */ | |
dc129d82 JT |
29 | #define ALPHA_REGISTER_SIZE 8 |
30 | ||
31 | /* Number of machine registers. */ | |
87d1b352 | 32 | #define ALPHA_NUM_REGS 67 |
dc129d82 JT |
33 | |
34 | /* Total amount of space needed to store our copies of the machine's | |
35 | register state. */ | |
36 | #define ALPHA_REGISTER_BYTES (ALPHA_NUM_REGS * 8) | |
37 | ||
0ba6dca9 AC |
38 | /* Register numbers of various important registers. Note that most of |
39 | these values are "real" register numbers, and correspond to the | |
44d88583 | 40 | general registers of the machine. */ |
dc129d82 JT |
41 | |
42 | #define ALPHA_V0_REGNUM 0 /* Function integer return value */ | |
43 | #define ALPHA_T7_REGNUM 8 /* Return address register for OSF/1 __add* */ | |
44 | #define ALPHA_GCC_FP_REGNUM 15 /* Used by gcc as frame register */ | |
45 | #define ALPHA_A0_REGNUM 16 /* Loc of first arg during a subr call */ | |
46 | #define ALPHA_T9_REGNUM 23 /* Return address register for OSF/1 __div* */ | |
72667056 | 47 | #define ALPHA_RA_REGNUM 26 /* Contains return address value */ |
dc129d82 | 48 | #define ALPHA_T12_REGNUM 27 /* Contains start addr of current proc */ |
72667056 | 49 | #define ALPHA_GP_REGNUM 29 /* Contains the global pointer */ |
dc129d82 | 50 | #define ALPHA_SP_REGNUM 30 /* Contains address of top of stack */ |
dc129d82 JT |
51 | #define ALPHA_ZERO_REGNUM 31 /* Read-only register, always 0 */ |
52 | #define ALPHA_FP0_REGNUM 32 /* Floating point register 0 */ | |
53 | #define ALPHA_FPA0_REGNUM 48 /* First float arg during a subr call */ | |
54 | #define ALPHA_FPCR_REGNUM 63 /* Floating point control register */ | |
55 | #define ALPHA_PC_REGNUM 64 /* Contains program counter */ | |
87d1b352 | 56 | #define ALPHA_UNIQUE_REGNUM 66 /* PAL_rduniq value */ |
dc129d82 JT |
57 | |
58 | /* The alpha has two different virtual pointers for arguments and locals. | |
59 | ||
60 | The virtual argument pointer is pointing to the bottom of the argument | |
61 | transfer area, which is located immediately below the virtual frame | |
62 | pointer. Its size is fixed for the native compiler, it is either zero | |
63 | (for the no arguments case) or large enough to hold all argument registers. | |
64 | gcc uses a variable sized argument transfer area. As it has | |
65 | to stay compatible with the native debugging tools it has to use the same | |
66 | virtual argument pointer and adjust the argument offsets accordingly. | |
67 | ||
68 | The virtual local pointer is localoff bytes below the virtual frame | |
69 | pointer, the value of localoff is obtained from the PDR. */ | |
70 | #define ALPHA_NUM_ARG_REGS 6 | |
71 | ||
dc129d82 JT |
72 | /* Target-dependent structure in gdbarch. */ |
73 | struct gdbarch_tdep | |
74 | { | |
d2427a71 | 75 | CORE_ADDR vm_min_address; /* Used by alpha_heuristic_proc_start. */ |
36a6271d JT |
76 | |
77 | /* If PC is inside a dynamically-generated signal trampoline function | |
78 | (i.e. one copied onto the user stack at run-time), return how many | |
79 | bytes PC is beyond the start of that function. Otherwise, return -1. */ | |
80 | LONGEST (*dynamic_sigtramp_offset) (CORE_ADDR); | |
81 | ||
d2427a71 RH |
82 | /* Translate a signal handler stack base address into the address of |
83 | the sigcontext structure for that signal handler. */ | |
5868c862 JT |
84 | CORE_ADDR (*sigcontext_addr) (struct frame_info *); |
85 | ||
138e7be5 MK |
86 | /* Offset of registers in `struct sigcontext'. */ |
87 | int sc_pc_offset; | |
88 | int sc_regs_offset; | |
89 | int sc_fpregs_offset; | |
90 | ||
accc6d1f JT |
91 | int jb_pc; /* Offset to PC value in jump buffer. |
92 | If htis is negative, longjmp support | |
93 | will be disabled. */ | |
94 | size_t jb_elt_size; /* And the size of each entry in the buf. */ | |
dc129d82 JT |
95 | }; |
96 | ||
d2427a71 RH |
97 | extern unsigned int alpha_read_insn (CORE_ADDR pc); |
98 | extern void alpha_software_single_step (enum target_signal, int); | |
d2427a71 | 99 | extern CORE_ADDR alpha_after_prologue (CORE_ADDR pc); |
d2427a71 RH |
100 | |
101 | extern void alpha_mdebug_init_abi (struct gdbarch_info, struct gdbarch *); | |
baa490c4 | 102 | extern void alpha_dwarf2_init_abi (struct gdbarch_info, struct gdbarch *); |
4bcbd6cb | 103 | |
98a8e1e5 RH |
104 | extern void alpha_supply_int_regs (int, const void *, const void *, |
105 | const void *); | |
106 | extern void alpha_fill_int_regs (int, void *, void *, void *); | |
107 | extern void alpha_supply_fp_regs (int, const void *, const void *); | |
108 | extern void alpha_fill_fp_regs (int, void *, void *); | |
109 | ||
dc129d82 | 110 | #endif /* ALPHA_TDEP_H */ |