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dc129d82 | 1 | /* Common target dependent code for GDB on Alpha systems. |
9b254dd1 DJ |
2 | Copyright (C) 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2002, 2003, 2007, |
3 | 2008 Free Software Foundation, Inc. | |
dc129d82 JT |
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 | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
dc129d82 JT |
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 | |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
dc129d82 JT |
19 | |
20 | #ifndef ALPHA_TDEP_H | |
21 | #define ALPHA_TDEP_H | |
22 | ||
390c1522 UW |
23 | struct regcache; |
24 | ||
dc129d82 | 25 | /* Say how long (ordinary) registers are. This is a piece of bogosity |
3acba339 AC |
26 | used in push_word and a few other places; register_size() is the |
27 | real way to know how big a register is. */ | |
dc129d82 JT |
28 | #define ALPHA_REGISTER_SIZE 8 |
29 | ||
30 | /* Number of machine registers. */ | |
87d1b352 | 31 | #define ALPHA_NUM_REGS 67 |
dc129d82 JT |
32 | |
33 | /* Total amount of space needed to store our copies of the machine's | |
34 | register state. */ | |
35 | #define ALPHA_REGISTER_BYTES (ALPHA_NUM_REGS * 8) | |
36 | ||
0ba6dca9 AC |
37 | /* Register numbers of various important registers. Note that most of |
38 | these values are "real" register numbers, and correspond to the | |
44d88583 | 39 | general registers of the machine. */ |
dc129d82 JT |
40 | |
41 | #define ALPHA_V0_REGNUM 0 /* Function integer return value */ | |
42 | #define ALPHA_T7_REGNUM 8 /* Return address register for OSF/1 __add* */ | |
4816ec69 | 43 | #define ALPHA_S0_REGNUM 9 /* First saved register */ |
dc129d82 JT |
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 | 57 | |
24c41760 MK |
58 | /* Instruction size. */ |
59 | #define ALPHA_INSN_SIZE 4 | |
60 | ||
dc129d82 JT |
61 | /* The alpha has two different virtual pointers for arguments and locals. |
62 | ||
63 | The virtual argument pointer is pointing to the bottom of the argument | |
64 | transfer area, which is located immediately below the virtual frame | |
65 | pointer. Its size is fixed for the native compiler, it is either zero | |
66 | (for the no arguments case) or large enough to hold all argument registers. | |
67 | gcc uses a variable sized argument transfer area. As it has | |
68 | to stay compatible with the native debugging tools it has to use the same | |
69 | virtual argument pointer and adjust the argument offsets accordingly. | |
70 | ||
71 | The virtual local pointer is localoff bytes below the virtual frame | |
72 | pointer, the value of localoff is obtained from the PDR. */ | |
73 | #define ALPHA_NUM_ARG_REGS 6 | |
74 | ||
dc129d82 JT |
75 | /* Target-dependent structure in gdbarch. */ |
76 | struct gdbarch_tdep | |
77 | { | |
d2427a71 | 78 | CORE_ADDR vm_min_address; /* Used by alpha_heuristic_proc_start. */ |
36a6271d JT |
79 | |
80 | /* If PC is inside a dynamically-generated signal trampoline function | |
81 | (i.e. one copied onto the user stack at run-time), return how many | |
82 | bytes PC is beyond the start of that function. Otherwise, return -1. */ | |
83 | LONGEST (*dynamic_sigtramp_offset) (CORE_ADDR); | |
84 | ||
d2427a71 RH |
85 | /* Translate a signal handler stack base address into the address of |
86 | the sigcontext structure for that signal handler. */ | |
5868c862 JT |
87 | CORE_ADDR (*sigcontext_addr) (struct frame_info *); |
88 | ||
f2524b93 AC |
89 | /* Does the PC fall in a signal trampoline. */ |
90 | /* NOTE: cagney/2004-04-30: Do not copy/clone this code. Instead | |
91 | look at tramp-frame.h and other simplier per-architecture | |
92 | sigtramp unwinders. */ | |
93 | int (*pc_in_sigtramp) (CORE_ADDR pc, char *name); | |
94 | ||
9823e921 RH |
95 | /* If TYPE will be returned in memory, return true. */ |
96 | int (*return_in_memory) (struct type *type); | |
97 | ||
138e7be5 MK |
98 | /* Offset of registers in `struct sigcontext'. */ |
99 | int sc_pc_offset; | |
100 | int sc_regs_offset; | |
101 | int sc_fpregs_offset; | |
102 | ||
accc6d1f JT |
103 | int jb_pc; /* Offset to PC value in jump buffer. |
104 | If htis is negative, longjmp support | |
105 | will be disabled. */ | |
106 | size_t jb_elt_size; /* And the size of each entry in the buf. */ | |
dc129d82 JT |
107 | }; |
108 | ||
d2427a71 | 109 | extern unsigned int alpha_read_insn (CORE_ADDR pc); |
0b1b3e42 | 110 | extern int alpha_software_single_step (struct frame_info *frame); |
d2427a71 | 111 | extern CORE_ADDR alpha_after_prologue (CORE_ADDR pc); |
d2427a71 RH |
112 | |
113 | extern void alpha_mdebug_init_abi (struct gdbarch_info, struct gdbarch *); | |
baa490c4 | 114 | extern void alpha_dwarf2_init_abi (struct gdbarch_info, struct gdbarch *); |
4bcbd6cb | 115 | |
390c1522 UW |
116 | extern void alpha_supply_int_regs (struct regcache *, int, const void *, |
117 | const void *, const void *); | |
118 | extern void alpha_fill_int_regs (const struct regcache *, int, | |
119 | void *, void *, void *); | |
120 | extern void alpha_supply_fp_regs (struct regcache *, int, | |
121 | const void *, const void *); | |
122 | extern void alpha_fill_fp_regs (const struct regcache *, | |
123 | int, void *, void *); | |
98a8e1e5 | 124 | |
dc129d82 | 125 | #endif /* ALPHA_TDEP_H */ |