aboutsummaryrefslogtreecommitdiff
path: root/gdb/alphanbsd-tdep.c
diff options
context:
space:
mode:
Diffstat (limited to 'gdb/alphanbsd-tdep.c')
-rw-r--r--gdb/alphanbsd-tdep.c240
1 files changed, 0 insertions, 240 deletions
diff --git a/gdb/alphanbsd-tdep.c b/gdb/alphanbsd-tdep.c
deleted file mode 100644
index bc7b1a4..0000000
--- a/gdb/alphanbsd-tdep.c
+++ /dev/null
@@ -1,240 +0,0 @@
-/* Target-dependent code for NetBSD/Alpha.
- Copyright 2002 Free Software Foundation, Inc.
- Contributed by Wasabi Systems, 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 2 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, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
-
-#include "defs.h"
-#include "gdbcore.h"
-#include "frame.h"
-#include "regcache.h"
-#include "value.h"
-
-#include "solib-svr4.h"
-
-#include "alpha-tdep.h"
-#include "alphabsd-tdep.h"
-#include "nbsd-tdep.h"
-
-static void
-fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which,
- CORE_ADDR ignore)
-{
- char *regs, *fpregs;
- int regno;
-
- /* Table to map a gdb register number to a trapframe register index. */
- static const int regmap[] =
- {
- 0, 1, 2, 3,
- 4, 5, 6, 7,
- 8, 9, 10, 11,
- 12, 13, 14, 15,
- 30, 31, 32, 16,
- 17, 18, 19, 20,
- 21, 22, 23, 24,
- 25, 29, 26
- };
-#define SIZEOF_TRAPFRAME (33 * 8)
-
- /* We get everything from one section. */
- if (which != 0)
- return;
-
- regs = core_reg_sect;
- fpregs = core_reg_sect + SIZEOF_TRAPFRAME;
-
- if (core_reg_size < (SIZEOF_TRAPFRAME + SIZEOF_STRUCT_FPREG))
- {
- warning ("Wrong size register set in core file.");
- return;
- }
-
- /* Integer registers. */
- for (regno = 0; regno < ALPHA_ZERO_REGNUM; regno++)
- supply_register (regno, regs + (regmap[regno] * 8));
- supply_register (ALPHA_ZERO_REGNUM, NULL);
- supply_register (FP_REGNUM, NULL);
- supply_register (PC_REGNUM, regs + (28 * 8));
-
- /* Floating point registers. */
- alphabsd_supply_fpreg (fpregs, -1);
-}
-
-static void
-fetch_elfcore_registers (char *core_reg_sect, unsigned core_reg_size, int which,
- CORE_ADDR ignore)
-{
- switch (which)
- {
- case 0: /* Integer registers. */
- if (core_reg_size != SIZEOF_STRUCT_REG)
- warning ("Wrong size register set in core file.");
- else
- alphabsd_supply_reg (core_reg_sect, -1);
- break;
-
- case 2: /* Floating point registers. */
- if (core_reg_size != SIZEOF_STRUCT_FPREG)
- warning ("Wrong size FP register set in core file.");
- else
- alphabsd_supply_fpreg (core_reg_sect, -1);
- break;
-
- default:
- /* Don't know what kind of register request this is; just ignore it. */
- break;
- }
-}
-
-static struct core_fns alphanbsd_core_fns =
-{
- bfd_target_unknown_flavour, /* core_flavour */
- default_check_format, /* check_format */
- default_core_sniffer, /* core_sniffer */
- fetch_core_registers, /* core_read_registers */
- NULL /* next */
-};
-
-static struct core_fns alphanbsd_elfcore_fns =
-{
- bfd_target_elf_flavour, /* core_flavour */
- default_check_format, /* check_format */
- default_core_sniffer, /* core_sniffer */
- fetch_elfcore_registers, /* core_read_registers */
- NULL /* next */
-};
-
-/* Under NetBSD/alpha, signal handler invocations can be identified by the
- designated code sequence that is used to return from a signal handler.
- In particular, the return address of a signal handler points to the
- following code sequence:
-
- ldq a0, 0(sp)
- lda sp, 16(sp)
- lda v0, 295(zero) # __sigreturn14
- call_pal callsys
-
- Each instruction has a unique encoding, so we simply attempt to match
- the instruction the PC is pointing to with any of the above instructions.
- If there is a hit, we know the offset to the start of the designated
- sequence and can then check whether we really are executing in the
- signal trampoline. If not, -1 is returned, otherwise the offset from the
- start of the return sequence is returned. */
-static const unsigned char sigtramp_retcode[] =
-{
- 0x00, 0x00, 0x1e, 0xa6, /* ldq a0, 0(sp) */
- 0x10, 0x00, 0xde, 0x23, /* lda sp, 16(sp) */
- 0x27, 0x01, 0x1f, 0x20, /* lda v0, 295(zero) */
- 0x83, 0x00, 0x00, 0x00, /* call_pal callsys */
-};
-#define RETCODE_NWORDS 4
-#define RETCODE_SIZE (RETCODE_NWORDS * 4)
-
-LONGEST
-alphanbsd_sigtramp_offset (CORE_ADDR pc)
-{
- unsigned char ret[RETCODE_SIZE], w[4];
- LONGEST off;
- int i;
-
- if (read_memory_nobpt (pc, (char *) w, 4) != 0)
- return -1;
-
- for (i = 0; i < RETCODE_NWORDS; i++)
- {
- if (memcmp (w, sigtramp_retcode + (i * 4), 4) == 0)
- break;
- }
- if (i == RETCODE_NWORDS)
- return (-1);
-
- off = i * 4;
- pc -= off;
-
- if (read_memory_nobpt (pc, (char *) ret, sizeof (ret)) != 0)
- return -1;
-
- if (memcmp (ret, sigtramp_retcode, RETCODE_SIZE) == 0)
- return off;
-
- return -1;
-}
-
-static int
-alphanbsd_pc_in_sigtramp (CORE_ADDR pc, char *func_name)
-{
- return (nbsd_pc_in_sigtramp (pc, func_name)
- || alphanbsd_sigtramp_offset (pc) >= 0);
-}
-
-static CORE_ADDR
-alphanbsd_sigcontext_addr (struct frame_info *frame)
-{
- /* FIXME: This is not correct for all versions of NetBSD/alpha.
- We will probably need to disassemble the trampoline to figure
- out which trampoline frame type we have. */
- return frame->frame;
-}
-
-static CORE_ADDR
-alphanbsd_skip_sigtramp_frame (struct frame_info *frame, CORE_ADDR pc)
-{
- char *name;
-
- /* FIXME: This is not correct for all versions of NetBSD/alpha.
- We will probably need to disassemble the trampoline to figure
- out which trampoline frame type we have. */
- find_pc_partial_function (pc, &name, (CORE_ADDR *) NULL, (CORE_ADDR *) NULL);
- if (PC_IN_SIGTRAMP (pc, name))
- return frame->frame;
- return 0;
-}
-
-static void
-alphanbsd_init_abi (struct gdbarch_info info,
- struct gdbarch *gdbarch)
-{
- struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
-
- set_gdbarch_pc_in_sigtramp (gdbarch, alphanbsd_pc_in_sigtramp);
-
- /* NetBSD/alpha does not provide single step support via ptrace(2); we
- must use software single-stepping. */
- set_gdbarch_software_single_step (gdbarch, alpha_software_single_step);
-
- set_solib_svr4_fetch_link_map_offsets (gdbarch,
- nbsd_lp64_solib_svr4_fetch_link_map_offsets);
-
- tdep->skip_sigtramp_frame = alphanbsd_skip_sigtramp_frame;
- tdep->dynamic_sigtramp_offset = alphanbsd_sigtramp_offset;
- tdep->sigcontext_addr = alphanbsd_sigcontext_addr;
-
- tdep->jb_pc = 2;
- tdep->jb_elt_size = 8;
-}
-
-void
-_initialize_alphanbsd_tdep (void)
-{
- gdbarch_register_osabi (bfd_arch_alpha, GDB_OSABI_NETBSD_ELF,
- alphanbsd_init_abi);
-
- add_core_fns (&alphanbsd_core_fns);
- add_core_fns (&alphanbsd_elfcore_fns);
-}
generated by cgit v1.1 at 2025-08-09 04:34:59 +0000