/* Xtensa GNU/Linux native support.
- Copyright (C) 2007-2014 Free Software Foundation, Inc.
+ Copyright (C) 2007-2020 Free Software Foundation, Inc.
This file is part of GDB.
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
-#include <string.h>
#include "frame.h"
#include "inferior.h"
#include "gdbcore.h"
#include "regcache.h"
#include "target.h"
#include "linux-nat.h"
-
-#include <stdint.h>
#include <sys/types.h>
#include <signal.h>
#include <sys/user.h>
#include <sys/ioctl.h>
-#include "gdb_wait.h"
+#include "gdbsupport/gdb_wait.h"
#include <fcntl.h>
#include <sys/procfs.h>
-#include <sys/ptrace.h>
+#include "nat/gdb_ptrace.h"
#include <asm/ptrace.h>
#include "gregset.h"
#include "xtensa-tdep.h"
+/* Defines ps_err_e, struct ps_prochandle. */
+#include "gdb_proc_service.h"
+
/* Extended register set depends on hardware configs.
Keeping these definitions separately allows to introduce
hardware-specific overlays. */
#include "xtensa-xtregs.c"
-static int
-get_thread_id (ptid_t ptid)
+class xtensa_linux_nat_target final : public linux_nat_target
{
- int tid = ptid_get_lwp (ptid);
- if (0 == tid)
- tid = ptid_get_pid (ptid);
- return tid;
-}
-#define GET_THREAD_ID(PTID) get_thread_id (PTID)
+public:
+ /* Add our register access methods. */
+ void fetch_registers (struct regcache *, int) override;
+ void store_registers (struct regcache *, int) override;
+};
+
+static xtensa_linux_nat_target the_xtensa_linux_nat_target;
void
fill_gregset (const struct regcache *regcache,
{
int i;
xtensa_elf_gregset_t *regs = (xtensa_elf_gregset_t *) gregsetp;
- struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ struct gdbarch *gdbarch = regcache->arch ();
if (regnum == gdbarch_pc_regnum (gdbarch) || regnum == -1)
- regcache_raw_collect (regcache, gdbarch_pc_regnum (gdbarch), ®s->pc);
+ regcache->raw_collect (gdbarch_pc_regnum (gdbarch), ®s->pc);
if (regnum == gdbarch_ps_regnum (gdbarch) || regnum == -1)
- regcache_raw_collect (regcache, gdbarch_ps_regnum (gdbarch), ®s->ps);
+ regcache->raw_collect (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);
+ regcache->raw_collect (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);
+ regcache->raw_collect (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);
+ regcache->raw_collect (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);
+ regcache->raw_collect (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);
+ regcache->raw_collect (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);
+ regcache->raw_collect (gdbarch_tdep (gdbarch)->sar_regnum,
+ ®s->sar);
+ if (regnum == gdbarch_tdep (gdbarch)->threadptr_regnum || regnum == -1)
+ regcache->raw_collect (gdbarch_tdep (gdbarch)->threadptr_regnum,
+ ®s->threadptr);
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]);
+ regcache->raw_collect (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]);
+ regcache->raw_collect (gdbarch_tdep (gdbarch)->ar_base + i,
+ ®s->ar[i]);
+ }
+ if (regnum >= gdbarch_tdep (gdbarch)->a0_base
+ && regnum < gdbarch_tdep (gdbarch)->a0_base + C0_NREGS)
+ regcache->raw_collect (regnum,
+ ®s->ar[(4 * regs->windowbase + regnum
+ - gdbarch_tdep (gdbarch)->a0_base)
+ % gdbarch_tdep (gdbarch)->num_aregs]);
+ else if (regnum == -1)
+ {
+ for (i = 0; i < C0_NREGS; ++i)
+ regcache->raw_collect (gdbarch_tdep (gdbarch)->a0_base + i,
+ (®s->ar[(4 * regs->windowbase + i)
+ % gdbarch_tdep (gdbarch)->num_aregs]));
}
}
-void
+static 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);
+ struct gdbarch *gdbarch = regcache->arch ();
if (regnum == gdbarch_pc_regnum (gdbarch) || regnum == -1)
- regcache_raw_supply (regcache, gdbarch_pc_regnum (gdbarch), ®s->pc);
+ regcache->raw_supply (gdbarch_pc_regnum (gdbarch), ®s->pc);
if (regnum == gdbarch_ps_regnum (gdbarch) || regnum == -1)
- regcache_raw_supply (regcache, gdbarch_ps_regnum (gdbarch), ®s->ps);
+ regcache->raw_supply (gdbarch_ps_regnum (gdbarch), ®s->ps);
if (regnum == gdbarch_tdep (gdbarch)->wb_regnum || regnum == -1)
- regcache_raw_supply (regcache,
- gdbarch_tdep (gdbarch)->wb_regnum,
+ regcache->raw_supply (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,
+ regcache->raw_supply (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,
+ regcache->raw_supply (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,
+ regcache->raw_supply (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,
+ regcache->raw_supply (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,
+ regcache->raw_supply (gdbarch_tdep (gdbarch)->sar_regnum,
®s->sar);
+ if (regnum == gdbarch_tdep (gdbarch)->threadptr_regnum || regnum == -1)
+ regcache->raw_supply (gdbarch_tdep (gdbarch)->threadptr_regnum,
+ ®s->threadptr);
if (regnum >=gdbarch_tdep (gdbarch)->ar_base
&& regnum < gdbarch_tdep (gdbarch)->ar_base
+ gdbarch_tdep (gdbarch)->num_aregs)
- regcache_raw_supply (regcache,regnum,
+ regcache->raw_supply (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,
+ regcache->raw_supply (gdbarch_tdep (gdbarch)->ar_base + i,
®s->ar[i]);
}
+ if (regnum >= gdbarch_tdep (gdbarch)->a0_base
+ && regnum < gdbarch_tdep (gdbarch)->a0_base + C0_NREGS)
+ regcache->raw_supply (regnum,
+ ®s->ar[(4 * regs->windowbase + regnum
+ - gdbarch_tdep (gdbarch)->a0_base)
+ % gdbarch_tdep (gdbarch)->num_aregs]);
+ else if (regnum == -1)
+ {
+ for (i = 0; i < C0_NREGS; ++i)
+ regcache->raw_supply (gdbarch_tdep (gdbarch)->a0_base + i,
+ ®s->ar[(4 * regs->windowbase + i)
+ % gdbarch_tdep (gdbarch)->num_aregs]);
+ }
}
void
static void
fetch_gregs (struct regcache *regcache, int regnum)
{
- int tid = GET_THREAD_ID (inferior_ptid);
- const gdb_gregset_t regs;
+ int tid = regcache->ptid ().lwp ();
+ gdb_gregset_t regs;
int areg;
if (ptrace (PTRACE_GETREGS, tid, 0, (long) ®s) < 0)
static void
store_gregs (struct regcache *regcache, int regnum)
{
- int tid = GET_THREAD_ID (inferior_ptid);
+ int tid = regcache->ptid ().lwp ();
gdb_gregset_t regs;
int areg;
static void
fetch_xtregs (struct regcache *regcache, int regnum)
{
- int tid = GET_THREAD_ID (inferior_ptid);
+ int tid = regcache->ptid ().lwp ();
const xtensa_regtable_t *ptr;
char xtregs [XTENSA_ELF_XTREG_SIZE];
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);
+ regcache->raw_supply (ptr->gdb_regnum, xtregs + ptr->ptrace_offset);
}
static void
store_xtregs (struct regcache *regcache, int regnum)
{
- int tid = GET_THREAD_ID (inferior_ptid);
+ int tid = regcache->ptid ().lwp ();
const xtensa_regtable_t *ptr;
char xtregs [XTENSA_ELF_XTREG_SIZE];
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);
+ regcache->raw_collect (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 target_ops *ops,
- struct regcache *regcache, int regnum)
+xtensa_linux_nat_target::fetch_registers (struct regcache *regcache,
+ int regnum)
{
if (regnum == -1)
{
}
void
-xtensa_linux_store_inferior_registers (struct target_ops *ops,
- struct regcache *regcache, int regnum)
+xtensa_linux_nat_target::store_registers (struct regcache *regcache,
+ int regnum)
{
if (regnum == -1)
{
store_xtregs (regcache, regnum);
}
-void _initialize_xtensa_linux_nat (void);
+/* Called by libthread_db. */
+
+ps_err_e
+ps_get_thread_area (struct ps_prochandle *ph,
+ lwpid_t lwpid, int idx, void **base)
+{
+ xtensa_elf_gregset_t regs;
+
+ if (ptrace (PTRACE_GETREGS, lwpid, NULL, ®s) != 0)
+ return PS_ERR;
+
+ /* IDX is the bias from the thread pointer to the beginning of the
+ thread descriptor. It has to be subtracted due to implementation
+ quirks in libthread_db. */
+ *base = (void *) ((char *) regs.threadptr - idx);
+
+ return PS_OK;
+}
void
_initialize_xtensa_linux_nat (void)
{
- struct target_ops *t;
const xtensa_regtable_t *ptr;
/* Calculate the number range for extended registers. */
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);
+ linux_target = &the_xtensa_linux_nat_target;
+ add_inf_child_target (&the_xtensa_linux_nat_target);
}