From 88ff171493e27609ac0ed7fc0463950513ac0d95 Mon Sep 17 00:00:00 2001 From: Maxim Grigoriev Date: Mon, 11 Feb 2008 21:58:41 +0000 Subject: 2008-02-11 Maxim Grigoriev * NEWS (New native configurations): Xtensa GNU/Linux. (New targets): Xtensa GNU/Linux. * Makefile.in (ALL_TARGET_OBS): Add xtensa-linux-nat.o and xtensa-linux-tdep.o (ALLDEPFILES): Add xtensa-linux-tdep.c and xtensa-linux-nat.c (xtensa-linux-nat.o, xtensa-linux-tdep.o): New dependencies. * configure.tgt (xtensa*-*-linux*): New entry. * xtensa-config.c (xtensa_tdep): New variable. (xtensa_config_byte_order, xtensa_config_tdep): Removed. (rmap): Change format based on new macro XTREG. (XTENSA_CONFIG_INSTANTIATE): Use new macro defined in xtensa-tdep.h. * xtensa-linux-nat.c: New. * xtensa-linux-tdep.c: New. * xtensa-xtregs.c: New. * xtensa-tdep.h (xtensa_elf_gregset_t): Update. (XTENSA_ELF_NGREG, XTREG, XTREG_END, XTENSA_GDBARCH_TDEP_INSTANTIATE) (XCHAL_NUM_CONTEXTS, XCHAL_HAVE_EXCEPTIONS): New macros. (xtensa_register_t): New field coprocessor. (XTENSA_REGISTER_FLAGS_PRIVILEGED): Name spelling corrected. * xtensa-tdep.c (xtensa_config_tdep, xtensa_config_byte_order): Removed. (xtensa_pseudo_register_read, xtensa_pseudo_register_write): Update to handle privileged registers. (xtensa_supply_gregset) Remove exccause and excvaddr registers. (xtensa_push_dummy_call): Set windowstart register correctly. (call0_analyze_prologue): Initialize xtensa_default_isa. (xtensa_derive_tdep): New. (xtensa_gdbarch_init): Get rid of xtensa_config_byte_order and xtensa_config_tdep, use XCHAL_HAVE_BE and xtensa_tdep instead. Call xtensa_derive_tdep(). * config/xtensa/linux.mh: New. * regformats/reg-xtensa.dat: New. --- gdb/xtensa-linux-nat.c | 322 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 322 insertions(+) create mode 100644 gdb/xtensa-linux-nat.c (limited to 'gdb/xtensa-linux-nat.c') diff --git a/gdb/xtensa-linux-nat.c b/gdb/xtensa-linux-nat.c new file mode 100644 index 00000000000..5d27173fd5d --- /dev/null +++ b/gdb/xtensa-linux-nat.c @@ -0,0 +1,322 @@ +/* Xtensa GNU/Linux native support. + + Copyright (C) 2007, 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 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 . */ + +#include "defs.h" +#include "gdb_string.h" +#include "frame.h" +#include "inferior.h" +#include "gdbcore.h" +#include "regcache.h" +#include "gdb_assert.h" +#include "target.h" +#include "linux-nat.h" + +#include +#include +#include +#include +#include +#include +#include "gdb_wait.h" +#include +#include +#include + +#include "gregset.h" +#include "xtensa-tdep.h" + +/* Extended register set depends on hardware configs. + Keeping these definitions separately allows to introduce + hardware-specific overlays. */ +#include "xtensa-xtregs.c" + +int +get_thread_id (ptid_t ptid) +{ + int tid = TIDGET (ptid); + if (0 == tid) + tid = PIDGET (ptid); + return tid; +} +#define GET_THREAD_ID(PTID) get_thread_id (PTID) + +void +fill_gregset (const struct regcache *regcache, + gdb_gregset_t *gregsetp, int regnum) +{ + int i; + xtensa_elf_gregset_t *regs = (xtensa_elf_gregset_t *) gregsetp; + struct gdbarch *gdbarch = get_regcache_arch (regcache); + + if (regnum == gdbarch_pc_regnum (gdbarch) || regnum == -1) + regcache_raw_collect (regcache, gdbarch_pc_regnum (gdbarch), ®s->pc); + if (regnum == gdbarch_ps_regnum (gdbarch) || regnum == -1) + regcache_raw_collect (regcache, gdbarch_ps_regnum (gdbarch), ®s->ps); + + if (regnum == gdbarch_tdep (gdbarch)->wb_regnum || regnum == -1) + regcache_raw_collect (regcache, + gdbarch_tdep (gdbarch)->wb_regnum, + ®s->windowbase); + if (regnum == gdbarch_tdep (gdbarch)->ws_regnum || regnum == -1) + regcache_raw_collect (regcache, + gdbarch_tdep (gdbarch)->ws_regnum, + ®s->windowstart); + if (regnum == gdbarch_tdep (gdbarch)->lbeg_regnum || regnum == -1) + regcache_raw_collect (regcache, + gdbarch_tdep (gdbarch)->lbeg_regnum, + ®s->lbeg); + if (regnum == gdbarch_tdep (gdbarch)->lend_regnum || regnum == -1) + regcache_raw_collect (regcache, + gdbarch_tdep (gdbarch)->lend_regnum, + ®s->lend); + if (regnum == gdbarch_tdep (gdbarch)->lcount_regnum || regnum == -1) + regcache_raw_collect (regcache, + gdbarch_tdep (gdbarch)->lcount_regnum, + ®s->lcount); + if (regnum == gdbarch_tdep (gdbarch)->sar_regnum || regnum == -1) + regcache_raw_collect (regcache, + gdbarch_tdep (gdbarch)->sar_regnum, + ®s->sar); + if (regnum >=gdbarch_tdep (gdbarch)->ar_base + && regnum < gdbarch_tdep (gdbarch)->ar_base + + gdbarch_tdep (gdbarch)->num_aregs) + regcache_raw_collect (regcache,regnum, + ®s->ar[regnum - gdbarch_tdep (gdbarch)->ar_base]); + else if (regnum == -1) + { + for (i = 0; i < gdbarch_tdep (gdbarch)->num_aregs; ++i) + regcache_raw_collect (regcache, + gdbarch_tdep (gdbarch)->ar_base + i, + ®s->ar[i]); + } +} + +void +supply_gregset_reg (struct regcache *regcache, + const gdb_gregset_t *gregsetp, int regnum) +{ + int i; + xtensa_elf_gregset_t *regs = (xtensa_elf_gregset_t *) gregsetp; + + struct gdbarch *gdbarch = get_regcache_arch (regcache); + + if (regnum == gdbarch_pc_regnum (gdbarch) || regnum == -1) + regcache_raw_supply (regcache, gdbarch_pc_regnum (gdbarch), ®s->pc); + if (regnum == gdbarch_ps_regnum (gdbarch) || regnum == -1) + regcache_raw_supply (regcache, gdbarch_ps_regnum (gdbarch), ®s->ps); + + if (regnum == gdbarch_tdep (gdbarch)->wb_regnum || regnum == -1) + regcache_raw_supply (regcache, + gdbarch_tdep (gdbarch)->wb_regnum, + ®s->windowbase); + if (regnum == gdbarch_tdep (gdbarch)->ws_regnum || regnum == -1) + regcache_raw_supply (regcache, + gdbarch_tdep (gdbarch)->ws_regnum, + ®s->windowstart); + if (regnum == gdbarch_tdep (gdbarch)->lbeg_regnum || regnum == -1) + regcache_raw_supply (regcache, + gdbarch_tdep (gdbarch)->lbeg_regnum, + ®s->lbeg); + if (regnum == gdbarch_tdep (gdbarch)->lend_regnum || regnum == -1) + regcache_raw_supply (regcache, + gdbarch_tdep (gdbarch)->lend_regnum, + ®s->lend); + if (regnum == gdbarch_tdep (gdbarch)->lcount_regnum || regnum == -1) + regcache_raw_supply (regcache, + gdbarch_tdep (gdbarch)->lcount_regnum, + ®s->lcount); + if (regnum == gdbarch_tdep (gdbarch)->sar_regnum || regnum == -1) + regcache_raw_supply (regcache, + gdbarch_tdep (gdbarch)->sar_regnum, + ®s->sar); + if (regnum >=gdbarch_tdep (gdbarch)->ar_base + && regnum < gdbarch_tdep (gdbarch)->ar_base + + gdbarch_tdep (gdbarch)->num_aregs) + regcache_raw_supply (regcache,regnum, + ®s->ar[regnum - gdbarch_tdep (gdbarch)->ar_base]); + else if (regnum == -1) + { + for (i = 0; i < gdbarch_tdep (gdbarch)->num_aregs; ++i) + regcache_raw_supply (regcache, + gdbarch_tdep (gdbarch)->ar_base + i, + ®s->ar[i]); + } +} + +void +supply_gregset (struct regcache *regcache, const gdb_gregset_t *gregsetp) +{ + supply_gregset_reg (regcache, gregsetp, -1); +} + +void +fill_fpregset (const struct regcache *regcache, + gdb_fpregset_t *fpregsetp, int regnum) +{ + return; +} + +void +supply_fpregset (struct regcache *regcache, + const gdb_fpregset_t *fpregsetp) +{ + return; +} + +/* Fetch greg-register(s) from process/thread TID + and store value(s) in GDB's register array. */ + +static void +fetch_gregs (struct regcache *regcache, int regnum) +{ + int tid = GET_THREAD_ID (inferior_ptid); + const gdb_gregset_t regs; + int areg; + + if (ptrace (PTRACE_GETREGS, tid, 0, (long) ®s) < 0) + { + perror_with_name (_("Couldn't get registers")); + return; + } + + supply_gregset_reg (regcache, ®s, regnum); +} + +/* Store greg-register(s) in GDB's register + array into the process/thread specified by TID. */ + +static void +store_gregs (struct regcache *regcache, int regnum) +{ + int tid = GET_THREAD_ID (inferior_ptid); + gdb_gregset_t regs; + int areg; + + if (ptrace (PTRACE_GETREGS, tid, 0, (long) ®s) < 0) + { + perror_with_name (_("Couldn't get registers")); + return; + } + + fill_gregset (regcache, ®s, regnum); + + if (ptrace (PTRACE_SETREGS, tid, 0, (long) ®s) < 0) + { + perror_with_name (_("Couldn't write registers")); + return; + } +} + +static int xtreg_lo; +static int xtreg_high; + +/* Fetch/Store Xtensa TIE registers. Xtensa GNU/Linux PTRACE + interface provides special requests for this. */ + +static void +fetch_xtregs (struct regcache *regcache, int regnum) +{ + int tid = GET_THREAD_ID (inferior_ptid); + const xtensa_regtable_t *ptr; + char xtregs [XTENSA_ELF_XTREG_SIZE]; + + if (ptrace (PTRACE_GETXTREGS, tid, 0, (long)&xtregs) < 0) + perror_with_name (_("Couldn't get extended registers")); + + for (ptr = xtensa_regmap_table; ptr->name; ptr++) + if (regnum == ptr->gdb_regnum || regnum == -1) + regcache_raw_supply (regcache, ptr->gdb_regnum, + xtregs + ptr->ptrace_offset); +} + +static void +store_xtregs (struct regcache *regcache, int regnum) +{ + int tid = GET_THREAD_ID (inferior_ptid); + const xtensa_regtable_t *ptr; + char xtregs [XTENSA_ELF_XTREG_SIZE]; + + if (ptrace (PTRACE_GETXTREGS, tid, 0, (long)&xtregs) < 0) + perror_with_name (_("Couldn't get extended registers")); + + for (ptr = xtensa_regmap_table; ptr->name; ptr++) + if (regnum == ptr->gdb_regnum || regnum == -1) + regcache_raw_collect (regcache, ptr->gdb_regnum, + xtregs + ptr->ptrace_offset); + + if (ptrace (PTRACE_SETXTREGS, tid, 0, (long)&xtregs) < 0) + perror_with_name (_("Couldn't write extended registers")); +} + +void +xtensa_linux_fetch_inferior_registers (struct regcache *regcache, int regnum) +{ + if (regnum == -1) + { + fetch_gregs (regcache, regnum); + fetch_xtregs (regcache, regnum); + } + else if ((regnum < xtreg_lo) || (regnum > xtreg_high)) + fetch_gregs (regcache, regnum); + else + fetch_xtregs (regcache, regnum); +} + +void +xtensa_linux_store_inferior_registers (struct regcache *regcache, int regnum) +{ + if (regnum == -1) + { + store_gregs (regcache, regnum); + store_xtregs (regcache, regnum); + } + else if ((regnum < xtreg_lo) || (regnum > xtreg_high)) + store_gregs (regcache, regnum); + else + store_xtregs (regcache, regnum); +} + +void _initialize_xtensa_linux_nat (void); + +void +_initialize_xtensa_linux_nat (void) +{ + struct target_ops *t; + const xtensa_regtable_t *ptr; + + /* Calculate the number range for extended registers. */ + xtreg_lo = 1000000000; + xtreg_high = -1; + for (ptr = xtensa_regmap_table; ptr->name; ptr++) + { + if (ptr->gdb_regnum < xtreg_lo) + xtreg_lo = ptr->gdb_regnum; + if (ptr->gdb_regnum > xtreg_high) + xtreg_high = ptr->gdb_regnum; + } + + /* Fill in the generic GNU/Linux methods. */ + t = linux_target (); + + /* Add our register access methods. */ + t->to_fetch_registers = xtensa_linux_fetch_inferior_registers; + t->to_store_registers = xtensa_linux_store_inferior_registers; + + linux_nat_add_target (t); +} -- cgit v1.2.1