/* Native-dependent code for SPARC.
- Copyright 2003 Free Software Foundation, Inc.
+ Copyright (C) 2003-2020 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
+ 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,
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. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "inferior.h"
#include "regcache.h"
+#include "target.h"
#include <signal.h>
-#include "gdb_string.h"
#include <sys/ptrace.h>
-#include "gdb_wait.h"
+#include "gdbsupport/gdb_wait.h"
#ifdef HAVE_MACHINE_REG_H
#include <machine/reg.h>
#endif
#include "sparc-tdep.h"
#include "sparc-nat.h"
+#include "inf-ptrace.h"
/* With some trickery we can use the code in this file for most (if
not all) ptrace(2) based SPARC systems, which includes SunOS 4,
- Linux and the various SPARC BSD's.
+ GNU/Linux and the various SPARC BSD's.
First, we need a data structure for use with ptrace(2). SunOS has
`struct regs' and `struct fp_status' in <machine/reg.h>. BSD's
#define PTRACE_SETFPREGS PT_SETFPREGS
#endif
+static PTRACE_TYPE_RET
+gdb_ptrace (PTRACE_TYPE_ARG1 request, ptid_t ptid, PTRACE_TYPE_ARG3 addr)
+{
+#ifdef __NetBSD__
+ /* Support for NetBSD threads: unlike other ptrace implementations in this
+ file, NetBSD requires that we pass both the pid and lwp. */
+ return ptrace (request, ptid.pid (), addr, ptid.lwp ());
+#else
+ pid_t pid = get_ptrace_pid (ptid);
+ return ptrace (request, pid, addr, 0);
+#endif
+}
+
/* Register set description. */
-const struct sparc_gregset *sparc_gregset;
-void (*sparc_supply_gregset) (const struct sparc_gregset *,
+const struct sparc_gregmap *sparc_gregmap;
+const struct sparc_fpregmap *sparc_fpregmap;
+void (*sparc_supply_gregset) (const struct sparc_gregmap *,
struct regcache *, int , const void *);
-void (*sparc_collect_gregset) (const struct sparc_gregset *,
+void (*sparc_collect_gregset) (const struct sparc_gregmap *,
const struct regcache *, int, void *);
-void (*sparc_supply_fpregset) (struct regcache *, int , const void *);
-void (*sparc_collect_fpregset) (const struct regcache *, int , void *);
-int (*sparc_gregset_supplies_p) (int);
-int (*sparc_fpregset_supplies_p) (int);
+void (*sparc_supply_fpregset) (const struct sparc_fpregmap *,
+ struct regcache *, int , const void *);
+void (*sparc_collect_fpregset) (const struct sparc_fpregmap *,
+ const struct regcache *, int , void *);
+int (*sparc_gregset_supplies_p) (struct gdbarch *, int);
+int (*sparc_fpregset_supplies_p) (struct gdbarch *, int);
/* Determine whether `gregset_t' contains register REGNUM. */
int
-sparc32_gregset_supplies_p (int regnum)
+sparc32_gregset_supplies_p (struct gdbarch *gdbarch, int regnum)
{
/* Integer registers. */
if ((regnum >= SPARC_G1_REGNUM && regnum <= SPARC_G7_REGNUM)
/* Determine whether `fpregset_t' contains register REGNUM. */
int
-sparc32_fpregset_supplies_p (int regnum)
+sparc32_fpregset_supplies_p (struct gdbarch *gdbarch, int regnum)
{
/* Floating-point registers. */
if (regnum >= SPARC_F0_REGNUM && regnum <= SPARC_F31_REGNUM)
for all registers (including the floating-point registers). */
void
-fetch_inferior_registers (int regnum)
+sparc_fetch_inferior_registers (struct regcache *regcache, int regnum)
{
- struct regcache *regcache = current_regcache;
- int pid;
-
- /* NOTE: cagney/2002-12-03: This code assumes that the currently
- selected light weight processes' registers can be written
- directly into the selected thread's register cache. This works
- fine when given an 1:1 LWP:thread model (such as found on
- GNU/Linux) but will, likely, have problems when used on an N:1
- (userland threads) or N:M (userland multiple LWP) model. In the
- case of the latter two, the LWP's registers do not necessarily
- belong to the selected thread (the LWP could be in the middle of
- executing the thread switch code).
-
- These functions should instead be paramaterized with an explicit
- object (struct regcache, struct thread_info?) into which the LWPs
- registers can be written. */
- pid = TIDGET (inferior_ptid);
- if (pid == 0)
- pid = PIDGET (inferior_ptid);
+ struct gdbarch *gdbarch = regcache->arch ();
+ ptid_t ptid = regcache->ptid ();
if (regnum == SPARC_G0_REGNUM)
{
- regcache_raw_supply (regcache, SPARC_G0_REGNUM, NULL);
+ gdb_byte zero[8] = { 0 };
+
+ regcache->raw_supply (SPARC_G0_REGNUM, &zero);
return;
}
- if (regnum == -1 || sparc_gregset_supplies_p (regnum))
+ if (regnum == -1 || sparc_gregset_supplies_p (gdbarch, regnum))
{
gregset_t regs;
- if (ptrace (PTRACE_GETREGS, pid, (PTRACE_ARG3_TYPE) ®s, 0) == -1)
- perror_with_name ("Couldn't get registers");
+ if (gdb_ptrace (PTRACE_GETREGS, ptid, (PTRACE_TYPE_ARG3) ®s) == -1)
+ perror_with_name (_("Couldn't get registers"));
- sparc_supply_gregset (sparc_gregset, regcache, -1, ®s);
+ sparc_supply_gregset (sparc_gregmap, regcache, -1, ®s);
if (regnum != -1)
return;
}
- if (regnum == -1 || sparc_fpregset_supplies_p (regnum))
+ if (regnum == -1 || sparc_fpregset_supplies_p (gdbarch, regnum))
{
fpregset_t fpregs;
- if (ptrace (PTRACE_GETFPREGS, pid, (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
- perror_with_name ("Couldn't get floating point status");
+ if (gdb_ptrace (PTRACE_GETFPREGS, ptid, (PTRACE_TYPE_ARG3) &fpregs) == -1)
+ perror_with_name (_("Couldn't get floating point status"));
- sparc_supply_fpregset (regcache, -1, &fpregs);
+ sparc_supply_fpregset (sparc_fpregmap, regcache, -1, &fpregs);
}
}
void
-store_inferior_registers (int regnum)
+sparc_store_inferior_registers (struct regcache *regcache, int regnum)
{
- struct regcache *regcache = current_regcache;
- int pid;
-
- /* NOTE: cagney/2002-12-02: See comment in fetch_inferior_registers
- about threaded assumptions. */
- pid = TIDGET (inferior_ptid);
- if (pid == 0)
- pid = PIDGET (inferior_ptid);
+ struct gdbarch *gdbarch = regcache->arch ();
+ ptid_t ptid = regcache->ptid ();
- if (regnum == -1 || sparc_gregset_supplies_p (regnum))
+ if (regnum == -1 || sparc_gregset_supplies_p (gdbarch, regnum))
{
gregset_t regs;
- if (ptrace (PTRACE_GETREGS, pid, (PTRACE_ARG3_TYPE) ®s, 0) == -1)
- perror_with_name ("Couldn't get registers");
+ if (gdb_ptrace (PTRACE_GETREGS, ptid, (PTRACE_TYPE_ARG3) ®s) == -1)
+ perror_with_name (_("Couldn't get registers"));
- sparc_collect_gregset (sparc_gregset, regcache, regnum, ®s);
+ sparc_collect_gregset (sparc_gregmap, regcache, regnum, ®s);
- if (ptrace (PTRACE_SETREGS, pid, (PTRACE_ARG3_TYPE) ®s, 0) == -1)
- perror_with_name ("Couldn't write registers");
+ if (gdb_ptrace (PTRACE_SETREGS, ptid, (PTRACE_TYPE_ARG3) ®s) == -1)
+ perror_with_name (_("Couldn't write registers"));
/* Deal with the stack regs. */
if (regnum == -1 || regnum == SPARC_SP_REGNUM
return;
}
- if (regnum == -1 || sparc_fpregset_supplies_p (regnum))
+ if (regnum == -1 || sparc_fpregset_supplies_p (gdbarch, regnum))
{
fpregset_t fpregs, saved_fpregs;
- if (ptrace (PTRACE_GETFPREGS, pid, (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
- perror_with_name ("Couldn't get floating-point registers");
+ if (gdb_ptrace (PTRACE_GETFPREGS, ptid, (PTRACE_TYPE_ARG3) &fpregs) == -1)
+ perror_with_name (_("Couldn't get floating-point registers"));
memcpy (&saved_fpregs, &fpregs, sizeof (fpregs));
- sparc_collect_fpregset (regcache, regnum, &fpregs);
+ sparc_collect_fpregset (sparc_fpregmap, regcache, regnum, &fpregs);
/* Writing the floating-point registers will fail on NetBSD with
EINVAL if the inferior process doesn't have an FPU state
to write the registers if nothing changed. */
if (memcmp (&saved_fpregs, &fpregs, sizeof (fpregs)) != 0)
{
- if (ptrace (PTRACE_SETFPREGS, pid,
- (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
- perror_with_name ("Couldn't write floating-point registers");
+ if (gdb_ptrace (PTRACE_SETFPREGS, ptid,
+ (PTRACE_TYPE_ARG3) &fpregs) == -1)
+ perror_with_name (_("Couldn't write floating-point registers"));
}
if (regnum != -1)
return;
}
}
-\f
-/* Provide a prototype to silence -Wmissing-prototypes. */
-void _initialize_sparc_nat (void);
+\f
+/* Implement the to_xfer_partial target_ops method for
+ TARGET_OBJECT_WCOOKIE. Fetch StackGhost Per-Process XOR cookie. */
+
+enum target_xfer_status
+sparc_xfer_wcookie (enum target_object object,
+ const char *annex, gdb_byte *readbuf,
+ const gdb_byte *writebuf, ULONGEST offset, ULONGEST len,
+ ULONGEST *xfered_len)
+{
+ unsigned long wcookie = 0;
+ char *buf = (char *)&wcookie;
+
+ gdb_assert (object == TARGET_OBJECT_WCOOKIE);
+ gdb_assert (readbuf && writebuf == NULL);
+
+ if (offset == sizeof (unsigned long))
+ return TARGET_XFER_EOF; /* Signal EOF. */
+ if (offset > sizeof (unsigned long))
+ return TARGET_XFER_E_IO;
+
+#ifdef PT_WCOOKIE
+ /* If PT_WCOOKIE is defined (by <sys/ptrace.h>), assume we're
+ running on an OpenBSD release that uses StackGhost (3.1 or
+ later). Since release 3.6, OpenBSD uses a fully randomized
+ cookie. */
+ {
+ int pid = inferior_ptid.pid ();
+
+ /* Sanity check. The proper type for a cookie is register_t, but
+ we can't assume that this type exists on all systems supported
+ by the code in this file. */
+ gdb_assert (sizeof (wcookie) == sizeof (register_t));
+
+ /* Fetch the cookie. */
+ if (ptrace (PT_WCOOKIE, pid, (PTRACE_TYPE_ARG3) &wcookie, 0) == -1)
+ {
+ if (errno != EINVAL)
+ perror_with_name (_("Couldn't get StackGhost cookie"));
+
+ /* Although PT_WCOOKIE is defined on OpenBSD 3.1 and later,
+ the request wasn't implemented until after OpenBSD 3.4. If
+ the kernel doesn't support the PT_WCOOKIE request, assume
+ we're running on a kernel that uses non-randomized cookies. */
+ wcookie = 0x3;
+ }
+ }
+#endif /* PT_WCOOKIE */
+
+ if (len > sizeof (unsigned long) - offset)
+ len = sizeof (unsigned long) - offset;
+
+ memcpy (readbuf, buf + offset, len);
+ *xfered_len = (ULONGEST) len;
+ return TARGET_XFER_OK;
+}
+\f
+void _initialize_sparc_nat ();
void
-_initialize_sparc_nat (void)
+_initialize_sparc_nat ()
{
- /* Deafult to using SunOS 4 register sets. */
- if (sparc_gregset == NULL)
- sparc_gregset = &sparc32_sunos4_gregset;
+ /* Default to using SunOS 4 register sets. */
+ if (sparc_gregmap == NULL)
+ sparc_gregmap = &sparc32_sunos4_gregmap;
+ if (sparc_fpregmap == NULL)
+ sparc_fpregmap = &sparc32_sunos4_fpregmap;
if (sparc_supply_gregset == NULL)
sparc_supply_gregset = sparc32_supply_gregset;
if (sparc_collect_gregset == NULL)
projects / deliverable / binutils-gdb.git / blobdiff