2011-08-14 22:03:45 +08:00
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/* GNU/Linux on TI C6x target support.
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2024-01-12 23:30:44 +08:00
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Copyright (C) 2011-2024 Free Software Foundation, Inc.
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2011-08-14 22:03:45 +08:00
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Contributed by Yao Qi <yao@codesourcery.com>
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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2019-01-28 03:51:36 +08:00
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#ifndef TIC6X_TDEP_H
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#define TIC6X_TDEP_H
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gdb: fix gdbarch_tdep ODR violation
I would like to be able to use non-trivial types in gdbarch_tdep types.
This is not possible at the moment (in theory), because of the one
definition rule.
To allow it, rename all gdbarch_tdep types to <arch>_gdbarch_tdep, and
make them inherit from a gdbarch_tdep base class. The inheritance is
necessary to be able to pass pointers to all these <arch>_gdbarch_tdep
objects to gdbarch_alloc, which takes a pointer to gdbarch_tdep.
These objects are never deleted through a base class pointer, so I
didn't include a virtual destructor. In the future, if gdbarch objects
deletable, I could imagine that the gdbarch_tdep objects could become
owned by the gdbarch objects, and then it would become useful to have a
virtual destructor (so that the gdbarch object can delete the owned
gdbarch_tdep object). But that's not necessary right now.
It turns out that RISC-V already has a gdbarch_tdep that is
non-default-constructible, so that provides a good motivation for this
change.
Most changes are fairly straightforward, mostly needing to add some
casts all over the place. There is however the xtensa architecture,
doing its own little weird thing to define its gdbarch_tdep. I did my
best to adapt it, but I can't test those changes.
Change-Id: Ic001903f91ddd106bd6ca09a79dabe8df2d69f3b
2021-11-16 00:29:39 +08:00
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#include "gdbarch.h"
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2011-08-14 22:03:45 +08:00
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enum
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{
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TIC6X_A4_REGNUM = 4,
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TIC6X_A5_REGNUM = 5,
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TIC6X_FP_REGNUM = 15, /* Frame Pointer: A15 */
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TIC6X_B0_REGNUM = 16,
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TIC6X_RA_REGNUM = 19, /* Return address: B3 */
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TIC6X_B4_REGNUM = 20,
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TIC6X_B5_REGNUM = 21,
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TIC6X_DP_REGNUM = 30, /* Data Page Pointer: B14 */
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TIC6X_SP_REGNUM = 31, /* Stack Pointer: B15 */
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TIC6X_CSR_REGNUM = 32,
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TIC6X_PC_REGNUM = 33,
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TIC6X_NUM_CORE_REGS = 33, /* The number of core registers */
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TIC6X_RILC_REGNUM = 68,
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TIC6X_NUM_REGS /* The number of registers */
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};
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#define TIC6X_INST_SWE 0x10000000
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extern const gdb_byte tic6x_bkpt_illegal_opcode_be[];
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extern const gdb_byte tic6x_bkpt_illegal_opcode_le[];
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/* Target-dependent structure in gdbarch. */
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2022-07-25 19:07:11 +08:00
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struct tic6x_gdbarch_tdep : gdbarch_tdep_base
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2011-08-14 22:03:45 +08:00
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{
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/* Return the expected next PC if FRAME is stopped at a syscall
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instruction. */
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gdb: pass frames as `const frame_info_ptr &`
We currently pass frames to function by value, as `frame_info_ptr`.
This is somewhat expensive:
- the size of `frame_info_ptr` is 64 bytes, which is a bit big to pass
by value
- the constructors and destructor link/unlink the object in the global
`frame_info_ptr::frame_list` list. This is an `intrusive_list`, so
it's not so bad: it's just assigning a few points, there's no memory
allocation as if it was `std::list`, but still it's useless to do
that over and over.
As suggested by Tom Tromey, change many function signatures to accept
`const frame_info_ptr &` instead of `frame_info_ptr`.
Some functions reassign their `frame_info_ptr` parameter, like:
void
the_func (frame_info_ptr frame)
{
for (; frame != nullptr; frame = get_prev_frame (frame))
{
...
}
}
I wondered what to do about them, do I leave them as-is or change them
(and need to introduce a separate local variable that can be
re-assigned). I opted for the later for consistency. It might not be
clear why some functions take `const frame_info_ptr &` while others take
`frame_info_ptr`. Also, if a function took a `frame_info_ptr` because
it did re-assign its parameter, I doubt that we would think to change it
to `const frame_info_ptr &` should the implementation change such that
it doesn't need to take `frame_info_ptr` anymore. It seems better to
have a simple rule and apply it everywhere.
Change-Id: I59d10addef687d157f82ccf4d54f5dde9a963fd0
Approved-By: Andrew Burgess <aburgess@redhat.com>
2024-02-20 02:07:47 +08:00
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CORE_ADDR (*syscall_next_pc) (const frame_info_ptr &frame) = nullptr;
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2011-08-14 22:03:45 +08:00
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gdb: fix gdbarch_tdep ODR violation
I would like to be able to use non-trivial types in gdbarch_tdep types.
This is not possible at the moment (in theory), because of the one
definition rule.
To allow it, rename all gdbarch_tdep types to <arch>_gdbarch_tdep, and
make them inherit from a gdbarch_tdep base class. The inheritance is
necessary to be able to pass pointers to all these <arch>_gdbarch_tdep
objects to gdbarch_alloc, which takes a pointer to gdbarch_tdep.
These objects are never deleted through a base class pointer, so I
didn't include a virtual destructor. In the future, if gdbarch objects
deletable, I could imagine that the gdbarch_tdep objects could become
owned by the gdbarch objects, and then it would become useful to have a
virtual destructor (so that the gdbarch object can delete the owned
gdbarch_tdep object). But that's not necessary right now.
It turns out that RISC-V already has a gdbarch_tdep that is
non-default-constructible, so that provides a good motivation for this
change.
Most changes are fairly straightforward, mostly needing to add some
casts all over the place. There is however the xtensa architecture,
doing its own little weird thing to define its gdbarch_tdep. I did my
best to adapt it, but I can't test those changes.
Change-Id: Ic001903f91ddd106bd6ca09a79dabe8df2d69f3b
2021-11-16 00:29:39 +08:00
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const gdb_byte *breakpoint = nullptr; /* Breakpoint instruction. */
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2011-08-14 22:03:45 +08:00
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gdb: fix gdbarch_tdep ODR violation
I would like to be able to use non-trivial types in gdbarch_tdep types.
This is not possible at the moment (in theory), because of the one
definition rule.
To allow it, rename all gdbarch_tdep types to <arch>_gdbarch_tdep, and
make them inherit from a gdbarch_tdep base class. The inheritance is
necessary to be able to pass pointers to all these <arch>_gdbarch_tdep
objects to gdbarch_alloc, which takes a pointer to gdbarch_tdep.
These objects are never deleted through a base class pointer, so I
didn't include a virtual destructor. In the future, if gdbarch objects
deletable, I could imagine that the gdbarch_tdep objects could become
owned by the gdbarch objects, and then it would become useful to have a
virtual destructor (so that the gdbarch object can delete the owned
gdbarch_tdep object). But that's not necessary right now.
It turns out that RISC-V already has a gdbarch_tdep that is
non-default-constructible, so that provides a good motivation for this
change.
Most changes are fairly straightforward, mostly needing to add some
casts all over the place. There is however the xtensa architecture,
doing its own little weird thing to define its gdbarch_tdep. I did my
best to adapt it, but I can't test those changes.
Change-Id: Ic001903f91ddd106bd6ca09a79dabe8df2d69f3b
2021-11-16 00:29:39 +08:00
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int has_gp = 0; /* Has general purpose registers A16 - A31 and B16 - B31. */
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2011-08-14 22:03:45 +08:00
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};
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2019-01-28 03:51:36 +08:00
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#endif /* TIC6X_TDEP_H */
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