1 /* Target-dependent code for Xilinx MicroBlaze.
3 Copyright (C) 2009-2021 Free Software Foundation, Inc.
5 This file is part of GDB.
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 3 of the License, or
10 (at your option) any later version.
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.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
33 #include "solib-svr4.h"
34 #include "microblaze-tdep.h"
35 #include "trad-frame.h"
36 #include "frame-unwind.h"
37 #include "tramp-frame.h"
38 #include "linux-tdep.h"
41 microblaze_linux_memory_remove_breakpoint (struct gdbarch
*gdbarch
,
42 struct bp_target_info
*bp_tgt
)
44 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
48 gdb_byte old_contents
[BREAKPOINT_MAX
];
50 /* Determine appropriate breakpoint contents and size for this address. */
51 bp
= gdbarch_breakpoint_from_pc (gdbarch
, &addr
, &bplen
);
53 val
= target_read_memory (addr
, old_contents
, bplen
);
55 /* If our breakpoint is no longer at the address, this means that the
56 program modified the code on us, so it is wrong to put back the
58 if (val
== 0 && memcmp (bp
, old_contents
, bplen
) == 0)
59 val
= target_write_raw_memory (addr
, bp_tgt
->shadow_contents
, bplen
);
65 microblaze_linux_sigtramp_cache (struct frame_info
*next_frame
,
66 struct trad_frame_cache
*this_cache
,
67 CORE_ADDR func
, LONGEST offset
,
74 base
= frame_unwind_register_unsigned (next_frame
, MICROBLAZE_SP_REGNUM
);
75 if (bias
> 0 && get_frame_address_in_block (next_frame
) != func
)
76 /* See below, some signal trampolines increment the stack as their
77 first instruction, need to compensate for that. */
80 /* Find the address of the register buffer. */
81 gpregs
= base
+ offset
;
83 /* Registers saved on stack. */
84 for (regnum
= 0; regnum
< MICROBLAZE_BTR_REGNUM
; regnum
++)
85 trad_frame_set_reg_addr (this_cache
, regnum
,
86 gpregs
+ regnum
* MICROBLAZE_REGISTER_SIZE
);
87 trad_frame_set_id (this_cache
, frame_id_build (base
, func
));
92 microblaze_linux_sighandler_cache_init (const struct tramp_frame
*self
,
93 struct frame_info
*next_frame
,
94 struct trad_frame_cache
*this_cache
,
97 microblaze_linux_sigtramp_cache (next_frame
, this_cache
, func
,
98 0 /* Offset to ucontext_t. */
99 + 24 /* Offset to .reg. */,
103 static struct tramp_frame microblaze_linux_sighandler_tramp_frame
=
108 { 0x31800077, ULONGEST_MAX
}, /* addik R12,R0,119. */
109 { 0xb9cc0008, ULONGEST_MAX
}, /* brki R14,8. */
110 { TRAMP_SENTINEL_INSN
},
112 microblaze_linux_sighandler_cache_init
117 microblaze_linux_init_abi (struct gdbarch_info info
,
118 struct gdbarch
*gdbarch
)
120 linux_init_abi (info
, gdbarch
, 0);
122 set_gdbarch_memory_remove_breakpoint (gdbarch
,
123 microblaze_linux_memory_remove_breakpoint
);
125 /* Shared library handling. */
126 set_solib_svr4_fetch_link_map_offsets (gdbarch
,
127 linux_ilp32_fetch_link_map_offsets
);
130 tramp_frame_prepend_unwinder (gdbarch
,
131 µblaze_linux_sighandler_tramp_frame
);
134 void _initialize_microblaze_linux_tdep ();
136 _initialize_microblaze_linux_tdep ()
138 gdbarch_register_osabi (bfd_arch_microblaze
, 0, GDB_OSABI_LINUX
,
139 microblaze_linux_init_abi
);