diff options
Diffstat (limited to 'gdb/hppanbsd-tdep.c')
| -rw-r--r-- | gdb/hppanbsd-tdep.c | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/gdb/hppanbsd-tdep.c b/gdb/hppanbsd-tdep.c new file mode 100644 index 0000000..e8c31f9 --- /dev/null +++ b/gdb/hppanbsd-tdep.c @@ -0,0 +1,228 @@ +/* Target-dependent code for NetBSD/hppa + + Copyright (C) 2008 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 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., 51 Franklin Street, Fifth Floor, + Boston, MA 02110-1301, USA. */ + +#include "defs.h" +#include "osabi.h" +#include "regcache.h" +#include "regset.h" + +#include "trad-frame.h" +#include "tramp-frame.h" + +#include "gdb_assert.h" +#include "gdb_string.h" + +#include "hppa-tdep.h" + +/* From <machine/mcontext.h>. */ +static int hppanbsd_mc_reg_offset[] = +{ + /* r0 ... r31 */ + -1, 1 * 4, 2 * 4, 3 * 4, + 4 * 4, 5 * 4, 6 * 4, 7 * 4, + 8 * 4, 9 * 4, 10 * 4, 11 * 4, + 12 * 4, 13 * 4, 14 * 4, 15 * 4, + 16 * 4, 17 * 4, 18 * 4, 19 * 4, + 20 * 4, 21 * 4, 22 * 4, 23 * 4, + 24 * 4, 25 * 4, 26 * 4, 27 * 4, + 28 * 4, 29 * 4, 30 * 4, 31 * 4, + + 32 * 4, /* HPPA_SAR_REGNUM */ + 35 * 4, /* HPPA_PCOQ_HEAD_REGNUM */ + 33 * 4, /* HPPA_PCSQ_HEAD_REGNUM */ + 36 * 4, /* HPPA_PCOQ_TAIL_REGNUM */ + 34 * 4, /* HPPA_PCSQ_TAIL_REGNUM */ + -1, /* HPPA_EIEM_REGNUM */ + -1, /* HPPA_IIR_REGNUM */ + -1, /* HPPA_ISR_REGNUM */ + -1, /* HPPA_IOR_REGNUM */ + 0 * 4, /* HPPA_IPSW_REGNUM */ + -1, /* spare? */ + 41 * 4, /* HPPA_SR4_REGNUM */ + 37 * 4, /* sr0 */ + 38 * 4, /* sr1 */ + 39 * 4, /* sr2 */ + 40 * 4, /* sr3 */ + + /* more tbd */ +}; + +static void hppanbsd_sigtramp_cache_init (const struct tramp_frame *, + struct frame_info *, + struct trad_frame_cache *, + CORE_ADDR); + +static const struct tramp_frame hppanbsd_sigtramp_si4 = +{ + SIGTRAMP_FRAME, + 4, + { + { 0xc7d7c012, -1 }, /* bb,>=,n %arg3, 30, 1f */ + { 0xd6e01c1e, -1 }, /* depwi 0,31,2,%arg3 */ + { 0x0ee81093, -1 }, /* ldw 4(%arg3), %r19 */ + { 0x0ee01097, -1 }, /* ldw 0(%arg3), %arg3 */ + /* 1: */ + { 0xe8404000, -1 }, /* blr %r0, %rp */ + { 0xeae0c002, -1 }, /* bv,n %r0(%arg3) */ + { 0x08000240, -1 }, /* nop */ + + { 0x0803025a, -1 }, /* copy %r3, %arg0 */ + { 0x20200801, -1 }, /* ldil -40000000, %r1 */ + { 0xe420e008, -1 }, /* be,l 4(%sr7, %r1), %sr0, %r31 */ + { 0x34160268, -1 }, /* ldi 134, %t1 ; SYS_setcontext */ + + { 0x081c025a, -1 }, /* copy ret0, %arg0 */ + { 0x20200801, -1 }, /* ldil -40000000, %r1 */ + { 0xe420e008, -1 }, /* be,l 4(%sr7, %r1), %sr0, %r31 */ + { 0x34160002, -1 }, /* ldi 1, %t1 ; SYS_exit */ + { TRAMP_SENTINEL_INSN, -1 } + }, + hppanbsd_sigtramp_cache_init +}; + + +static void +hppanbsd_sigtramp_cache_init (const struct tramp_frame *self, + struct frame_info *next_frame, + struct trad_frame_cache *this_cache, + CORE_ADDR func) +{ + struct gdbarch *gdbarch = get_frame_arch (next_frame); + struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); + CORE_ADDR sp = frame_unwind_register_unsigned (next_frame, HPPA_SP_REGNUM); + CORE_ADDR base; + int *reg_offset; + int num_regs; + int i; + + reg_offset = hppanbsd_mc_reg_offset; + num_regs = ARRAY_SIZE (hppanbsd_mc_reg_offset); + + /* frame pointer */ + base = sp - 0x280; + /* offsetof(struct sigframe_siginfo, sf_uc) = 128 */ + base += 128; + /* offsetof(ucontext_t, uc_mcontext) == 40 */ + base += 40; + + for (i = 0; i < num_regs; i++) + if (reg_offset[i] != -1) + trad_frame_set_reg_addr (this_cache, i, base + reg_offset[i]); + + /* Construct the frame ID using the function start. */ + trad_frame_set_id (this_cache, frame_id_build (sp, func)); +} + +/* Core file support. */ + +/* Sizeof `struct reg' in <machine/reg.h>. */ +#define HPPANBSD_SIZEOF_GREGS (44 * 4) + +static int hppanbsd_reg_offset[] = +{ + /* r0 ... r31 */ + -1, 1 * 4, 2 * 4, 3 * 4, + 4 * 4, 5 * 4, 6 * 4, 7 * 4, + 8 * 4, 9 * 4, 10 * 4, 11 * 4, + 12 * 4, 13 * 4, 14 * 4, 15 * 4, + 16 * 4, 17 * 4, 18 * 4, 19 * 4, + 20 * 4, 21 * 4, 22 * 4, 23 * 4, + 24 * 4, 25 * 4, 26 * 4, 27 * 4, + 28 * 4, 29 * 4, 30 * 4, 31 * 4, + + 32 * 4, /* HPPA_SAR_REGNUM */ + 35 * 4, /* HPPA_PCOQ_HEAD_REGNUM */ + 33 * 4, /* HPPA_PCSQ_HEAD_REGNUM */ + 36 * 4, /* HPPA_PCOQ_TAIL_REGNUM */ + 34 * 4, /* HPPA_PCSQ_TAIL_REGNUM */ + -1, /* HPPA_EIEM_REGNUM */ + -1, /* HPPA_IIR_REGNUM */ + -1, /* HPPA_ISR_REGNUM */ + -1, /* HPPA_IOR_REGNUM */ + 0 * 4, /* HPPA_IPSW_REGNUM */ +}; + +/* Supply register REGNUM from the buffer specified by GREGS and LEN + in the general-purpose register set REGSET to register cache + REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */ + +static void +hppanbsd_supply_gregset (const struct regset *regset, struct regcache *regcache, + int regnum, const void *gregs, size_t len) +{ + const gdb_byte *regs = gregs; + size_t offset; + int i; + + gdb_assert (len >= HPPANBSD_SIZEOF_GREGS); + + for (i = 0; i < ARRAY_SIZE (hppanbsd_reg_offset); i++) + if (hppanbsd_reg_offset[i] != -1) + if (regnum == -1 || regnum == i) + regcache_raw_supply (regcache, i, regs + hppanbsd_reg_offset[i]); +} + +/* NetBSD/hppa register set. */ + +static struct regset hppanbsd_gregset = +{ + NULL, + hppanbsd_supply_gregset +}; + +/* Return the appropriate register set for the core section identified + by SECT_NAME and SECT_SIZE. */ + +static const struct regset * +hppanbsd_regset_from_core_section (struct gdbarch *gdbarch, + const char *sect_name, size_t sect_size) +{ + if (strcmp (sect_name, ".reg") == 0 && sect_size >= HPPANBSD_SIZEOF_GREGS) + return &hppanbsd_gregset; + + return NULL; +} + +void hppabsd_init_abi (struct gdbarch_info, struct gdbarch *); + +static void +hppanbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) +{ + /* Obviously NetBSD is BSD-based. */ + hppabsd_init_abi (info, gdbarch); + + /* Core file support. */ + set_gdbarch_regset_from_core_section + (gdbarch, hppanbsd_regset_from_core_section); + + tramp_frame_prepend_unwinder (gdbarch, &hppanbsd_sigtramp_si4); +} + + +/* Provide a prototype to silence -Wmissing-prototypes. */ +void _initialize_hppabsd_tdep (void); + +void +_initialize_hppanbsd_tdep (void) +{ + gdbarch_register_osabi (bfd_arch_hppa, 0, GDB_OSABI_NETBSD_ELF, + hppanbsd_init_abi); +} |