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-rw-r--r--gdb/xtensa-linux-nat.c322
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diff --git a/gdb/xtensa-linux-nat.c b/gdb/xtensa-linux-nat.c
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+/* 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 <http://www.gnu.org/licenses/>. */
+
+#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 <stdint.h>
+#include <sys/types.h>
+#include <sys/param.h>
+#include <signal.h>
+#include <sys/user.h>
+#include <sys/ioctl.h>
+#include "gdb_wait.h"
+#include <fcntl.h>
+#include <sys/procfs.h>
+#include <sys/ptrace.h>
+
+#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), &regs->pc);
+ if (regnum == gdbarch_ps_regnum (gdbarch) || regnum == -1)
+ regcache_raw_collect (regcache, gdbarch_ps_regnum (gdbarch), &regs->ps);
+
+ if (regnum == gdbarch_tdep (gdbarch)->wb_regnum || regnum == -1)
+ regcache_raw_collect (regcache,
+ gdbarch_tdep (gdbarch)->wb_regnum,
+ &regs->windowbase);
+ if (regnum == gdbarch_tdep (gdbarch)->ws_regnum || regnum == -1)
+ regcache_raw_collect (regcache,
+ gdbarch_tdep (gdbarch)->ws_regnum,
+ &regs->windowstart);
+ if (regnum == gdbarch_tdep (gdbarch)->lbeg_regnum || regnum == -1)
+ regcache_raw_collect (regcache,
+ gdbarch_tdep (gdbarch)->lbeg_regnum,
+ &regs->lbeg);
+ if (regnum == gdbarch_tdep (gdbarch)->lend_regnum || regnum == -1)
+ regcache_raw_collect (regcache,
+ gdbarch_tdep (gdbarch)->lend_regnum,
+ &regs->lend);
+ if (regnum == gdbarch_tdep (gdbarch)->lcount_regnum || regnum == -1)
+ regcache_raw_collect (regcache,
+ gdbarch_tdep (gdbarch)->lcount_regnum,
+ &regs->lcount);
+ if (regnum == gdbarch_tdep (gdbarch)->sar_regnum || regnum == -1)
+ regcache_raw_collect (regcache,
+ gdbarch_tdep (gdbarch)->sar_regnum,
+ &regs->sar);
+ if (regnum >=gdbarch_tdep (gdbarch)->ar_base
+ && regnum < gdbarch_tdep (gdbarch)->ar_base
+ + gdbarch_tdep (gdbarch)->num_aregs)
+ regcache_raw_collect (regcache,regnum,
+ &regs->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,
+ &regs->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), &regs->pc);
+ if (regnum == gdbarch_ps_regnum (gdbarch) || regnum == -1)
+ regcache_raw_supply (regcache, gdbarch_ps_regnum (gdbarch), &regs->ps);
+
+ if (regnum == gdbarch_tdep (gdbarch)->wb_regnum || regnum == -1)
+ regcache_raw_supply (regcache,
+ gdbarch_tdep (gdbarch)->wb_regnum,
+ &regs->windowbase);
+ if (regnum == gdbarch_tdep (gdbarch)->ws_regnum || regnum == -1)
+ regcache_raw_supply (regcache,
+ gdbarch_tdep (gdbarch)->ws_regnum,
+ &regs->windowstart);
+ if (regnum == gdbarch_tdep (gdbarch)->lbeg_regnum || regnum == -1)
+ regcache_raw_supply (regcache,
+ gdbarch_tdep (gdbarch)->lbeg_regnum,
+ &regs->lbeg);
+ if (regnum == gdbarch_tdep (gdbarch)->lend_regnum || regnum == -1)
+ regcache_raw_supply (regcache,
+ gdbarch_tdep (gdbarch)->lend_regnum,
+ &regs->lend);
+ if (regnum == gdbarch_tdep (gdbarch)->lcount_regnum || regnum == -1)
+ regcache_raw_supply (regcache,
+ gdbarch_tdep (gdbarch)->lcount_regnum,
+ &regs->lcount);
+ if (regnum == gdbarch_tdep (gdbarch)->sar_regnum || regnum == -1)
+ regcache_raw_supply (regcache,
+ gdbarch_tdep (gdbarch)->sar_regnum,
+ &regs->sar);
+ if (regnum >=gdbarch_tdep (gdbarch)->ar_base
+ && regnum < gdbarch_tdep (gdbarch)->ar_base
+ + gdbarch_tdep (gdbarch)->num_aregs)
+ regcache_raw_supply (regcache,regnum,
+ &regs->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,
+ &regs->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) &regs) < 0)
+ {
+ perror_with_name (_("Couldn't get registers"));
+ return;
+ }
+
+ supply_gregset_reg (regcache, &regs, 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) &regs) < 0)
+ {
+ perror_with_name (_("Couldn't get registers"));
+ return;
+ }
+
+ fill_gregset (regcache, &regs, regnum);
+
+ if (ptrace (PTRACE_SETREGS, tid, 0, (long) &regs) < 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);
+}
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