1 /* Low level Alpha GNU/Linux interface, for GDB when running native.
2 Copyright (C) 2005-2019 Free Software Foundation, Inc.
4 This file is part of GDB.
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
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
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.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 #include "linux-nat-trad.h"
24 #include "alpha-tdep.h"
26 #include "nat/gdb_ptrace.h"
27 #include <alpha/ptrace.h>
29 #include <sys/procfs.h>
32 /* The address of UNIQUE for ptrace. */
33 #define ALPHA_UNIQUE_PTRACE_ADDR 65
35 class alpha_linux_nat_target final : public linux_nat_trad_target
38 /* Override linux_nat_trad_target methods. */
39 CORE_ADDR register_u_offset (struct gdbarch *gdbarch,
40 int regno, int store_p) override;
43 static alpha_linux_nat_target the_alpha_linux_nat_target;
45 /* See the comment in m68k-tdep.c regarding the utility of these
49 supply_gregset (struct regcache *regcache, const gdb_gregset_t *gregsetp)
51 const long *regp = (const long *)gregsetp;
53 /* PC is in slot 32, UNIQUE is in slot 33. */
54 alpha_supply_int_regs (regcache, -1, regp, regp + 31, regp + 32);
58 fill_gregset (const struct regcache *regcache,
59 gdb_gregset_t *gregsetp, int regno)
61 long *regp = (long *)gregsetp;
63 /* PC is in slot 32, UNIQUE is in slot 33. */
64 alpha_fill_int_regs (regcache, regno, regp, regp + 31, regp + 32);
67 /* Now we do the same thing for floating-point registers.
68 Again, see the comments in m68k-tdep.c. */
71 supply_fpregset (struct regcache *regcache, const gdb_fpregset_t *fpregsetp)
73 const long *regp = (const long *)fpregsetp;
75 /* FPCR is in slot 32. */
76 alpha_supply_fp_regs (regcache, -1, regp, regp + 31);
80 fill_fpregset (const struct regcache *regcache,
81 gdb_fpregset_t *fpregsetp, int regno)
83 long *regp = (long *)fpregsetp;
85 /* FPCR is in slot 32. */
86 alpha_fill_fp_regs (regcache, regno, regp, regp + 31);
90 alpha_linux_nat_target::register_u_offset (struct gdbarch *gdbarch,
91 int regno, int store_p)
93 if (regno == gdbarch_pc_regnum (gdbarch))
95 if (regno == ALPHA_UNIQUE_REGNUM)
96 return ALPHA_UNIQUE_PTRACE_ADDR;
97 if (regno < gdbarch_fp0_regnum (gdbarch))
98 return GPR_BASE + regno;
100 return FPR_BASE + regno - gdbarch_fp0_regnum (gdbarch);
104 _initialize_alpha_linux_nat (void)
106 linux_target = &the_alpha_linux_nat_target;
107 add_inf_child_target (&the_alpha_linux_nat_target);