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- /* Low level Alpha GNU/Linux interface, for GDB when running native.
- Copyright (C) 2005-2022 Free Software Foundation, Inc.
- This file is part of GDB.
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>. */
- #include "defs.h"
- #include "target.h"
- #include "regcache.h"
- #include "linux-nat-trad.h"
- #include "alpha-tdep.h"
- #include "gdbarch.h"
- #include "nat/gdb_ptrace.h"
- #include <alpha/ptrace.h>
- #include <sys/procfs.h>
- #include "gregset.h"
- /* The address of UNIQUE for ptrace. */
- #define ALPHA_UNIQUE_PTRACE_ADDR 65
- class alpha_linux_nat_target final : public linux_nat_trad_target
- {
- protected:
- /* Override linux_nat_trad_target methods. */
- CORE_ADDR register_u_offset (struct gdbarch *gdbarch,
- int regno, int store_p) override;
- };
- static alpha_linux_nat_target the_alpha_linux_nat_target;
- /* See the comment in m68k-tdep.c regarding the utility of these
- functions. */
- void
- supply_gregset (struct regcache *regcache, const gdb_gregset_t *gregsetp)
- {
- const long *regp = (const long *)gregsetp;
- /* PC is in slot 32, UNIQUE is in slot 33. */
- alpha_supply_int_regs (regcache, -1, regp, regp + 31, regp + 32);
- }
- void
- fill_gregset (const struct regcache *regcache,
- gdb_gregset_t *gregsetp, int regno)
- {
- long *regp = (long *)gregsetp;
- /* PC is in slot 32, UNIQUE is in slot 33. */
- alpha_fill_int_regs (regcache, regno, regp, regp + 31, regp + 32);
- }
- /* Now we do the same thing for floating-point registers.
- Again, see the comments in m68k-tdep.c. */
- void
- supply_fpregset (struct regcache *regcache, const gdb_fpregset_t *fpregsetp)
- {
- const long *regp = (const long *)fpregsetp;
- /* FPCR is in slot 32. */
- alpha_supply_fp_regs (regcache, -1, regp, regp + 31);
- }
- void
- fill_fpregset (const struct regcache *regcache,
- gdb_fpregset_t *fpregsetp, int regno)
- {
- long *regp = (long *)fpregsetp;
- /* FPCR is in slot 32. */
- alpha_fill_fp_regs (regcache, regno, regp, regp + 31);
- }
- CORE_ADDR
- alpha_linux_nat_target::register_u_offset (struct gdbarch *gdbarch,
- int regno, int store_p)
- {
- if (regno == gdbarch_pc_regnum (gdbarch))
- return PC;
- if (regno == ALPHA_UNIQUE_REGNUM)
- return ALPHA_UNIQUE_PTRACE_ADDR;
- if (regno < gdbarch_fp0_regnum (gdbarch))
- return GPR_BASE + regno;
- else
- return FPR_BASE + regno - gdbarch_fp0_regnum (gdbarch);
- }
- void _initialize_alpha_linux_nat ();
- void
- _initialize_alpha_linux_nat ()
- {
- linux_target = &the_alpha_linux_nat_target;
- add_inf_child_target (&the_alpha_linux_nat_target);
- }
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