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dc129d82 | 1 | /* Common target dependent code for GDB on Alpha systems. |
1d506c26 | 2 | Copyright (C) 1993-2024 Free Software Foundation, Inc. |
dc129d82 JT |
3 | |
4 | This file is part of GDB. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 8 | the Free Software Foundation; either version 3 of the License, or |
dc129d82 JT |
9 | (at your option) any later version. |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 17 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
dc129d82 JT |
18 | |
19 | #ifndef ALPHA_TDEP_H | |
20 | #define ALPHA_TDEP_H | |
21 | ||
345bd07c SM |
22 | #include "gdbarch.h" |
23 | ||
390c1522 UW |
24 | struct regcache; |
25 | ||
dc129d82 | 26 | /* Say how long (ordinary) registers are. This is a piece of bogosity |
3acba339 AC |
27 | used in push_word and a few other places; register_size() is the |
28 | real way to know how big a register is. */ | |
dc129d82 JT |
29 | #define ALPHA_REGISTER_SIZE 8 |
30 | ||
31 | /* Number of machine registers. */ | |
87d1b352 | 32 | #define ALPHA_NUM_REGS 67 |
dc129d82 | 33 | |
0ba6dca9 AC |
34 | /* Register numbers of various important registers. Note that most of |
35 | these values are "real" register numbers, and correspond to the | |
44d88583 | 36 | general registers of the machine. */ |
dc129d82 JT |
37 | |
38 | #define ALPHA_V0_REGNUM 0 /* Function integer return value */ | |
39 | #define ALPHA_T7_REGNUM 8 /* Return address register for OSF/1 __add* */ | |
4816ec69 | 40 | #define ALPHA_S0_REGNUM 9 /* First saved register */ |
dc129d82 JT |
41 | #define ALPHA_GCC_FP_REGNUM 15 /* Used by gcc as frame register */ |
42 | #define ALPHA_A0_REGNUM 16 /* Loc of first arg during a subr call */ | |
43 | #define ALPHA_T9_REGNUM 23 /* Return address register for OSF/1 __div* */ | |
72667056 | 44 | #define ALPHA_RA_REGNUM 26 /* Contains return address value */ |
dc129d82 | 45 | #define ALPHA_T12_REGNUM 27 /* Contains start addr of current proc */ |
72667056 | 46 | #define ALPHA_GP_REGNUM 29 /* Contains the global pointer */ |
dc129d82 | 47 | #define ALPHA_SP_REGNUM 30 /* Contains address of top of stack */ |
dc129d82 JT |
48 | #define ALPHA_ZERO_REGNUM 31 /* Read-only register, always 0 */ |
49 | #define ALPHA_FP0_REGNUM 32 /* Floating point register 0 */ | |
50 | #define ALPHA_FPA0_REGNUM 48 /* First float arg during a subr call */ | |
51 | #define ALPHA_FPCR_REGNUM 63 /* Floating point control register */ | |
52 | #define ALPHA_PC_REGNUM 64 /* Contains program counter */ | |
87d1b352 | 53 | #define ALPHA_UNIQUE_REGNUM 66 /* PAL_rduniq value */ |
dc129d82 | 54 | |
24c41760 MK |
55 | /* Instruction size. */ |
56 | #define ALPHA_INSN_SIZE 4 | |
57 | ||
dc129d82 JT |
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 | |
0963b4bd | 62 | pointer. Its size is fixed for the native compiler, it is either zero |
dc129d82 | 63 | (for the no arguments case) or large enough to hold all argument registers. |
0963b4bd | 64 | gcc uses a variable sized argument transfer area. As it has |
dc129d82 JT |
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 | 72 | /* Target-dependent structure in gdbarch. */ |
ab25d9bb | 73 | struct alpha_gdbarch_tdep : gdbarch_tdep_base |
dc129d82 | 74 | { |
345bd07c | 75 | CORE_ADDR vm_min_address = 0; /* 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. */ | |
345bd07c | 80 | LONGEST (*dynamic_sigtramp_offset) (struct gdbarch *, CORE_ADDR) = nullptr; |
36a6271d | 81 | |
d2427a71 RH |
82 | /* Translate a signal handler stack base address into the address of |
83 | the sigcontext structure for that signal handler. */ | |
8480a37e | 84 | CORE_ADDR (*sigcontext_addr) (const frame_info_ptr &) = nullptr; |
5868c862 | 85 | |
f2524b93 AC |
86 | /* Does the PC fall in a signal trampoline. */ |
87 | /* NOTE: cagney/2004-04-30: Do not copy/clone this code. Instead | |
85102364 | 88 | look at tramp-frame.h and other simpler per-architecture |
f2524b93 | 89 | sigtramp unwinders. */ |
2c02bd72 | 90 | int (*pc_in_sigtramp) (struct gdbarch *gdbarch, CORE_ADDR pc, |
345bd07c | 91 | const char *name) = nullptr; |
f2524b93 | 92 | |
9823e921 | 93 | /* If TYPE will be returned in memory, return true. */ |
345bd07c | 94 | int (*return_in_memory) (struct type *type) = nullptr; |
9823e921 | 95 | |
138e7be5 | 96 | /* Offset of registers in `struct sigcontext'. */ |
345bd07c SM |
97 | int sc_pc_offset = 0; |
98 | int sc_regs_offset = 0; | |
99 | int sc_fpregs_offset = 0; | |
138e7be5 | 100 | |
345bd07c | 101 | int jb_pc = 0; /* Offset to PC value in jump buffer. |
accc6d1f JT |
102 | If htis is negative, longjmp support |
103 | will be disabled. */ | |
345bd07c | 104 | size_t jb_elt_size = 0; /* And the size of each entry in the buf. */ |
dc129d82 JT |
105 | }; |
106 | ||
e17a4113 | 107 | extern unsigned int alpha_read_insn (struct gdbarch *gdbarch, CORE_ADDR pc); |
a0ff9e1a SM |
108 | extern std::vector<CORE_ADDR> alpha_software_single_step |
109 | (struct regcache *regcache); | |
d2427a71 | 110 | extern CORE_ADDR alpha_after_prologue (CORE_ADDR pc); |
d2427a71 RH |
111 | |
112 | extern void alpha_mdebug_init_abi (struct gdbarch_info, struct gdbarch *); | |
baa490c4 | 113 | extern void alpha_dwarf2_init_abi (struct gdbarch_info, struct gdbarch *); |
4bcbd6cb | 114 | |
390c1522 UW |
115 | extern void alpha_supply_int_regs (struct regcache *, int, const void *, |
116 | const void *, const void *); | |
117 | extern void alpha_fill_int_regs (const struct regcache *, int, | |
118 | void *, void *, void *); | |
119 | extern void alpha_supply_fp_regs (struct regcache *, int, | |
120 | const void *, const void *); | |
121 | extern void alpha_fill_fp_regs (const struct regcache *, | |
122 | int, void *, void *); | |
98a8e1e5 | 123 | |
dc129d82 | 124 | #endif /* ALPHA_TDEP_H */ |