old-cross-binutils/gdb/s390-nat.c
Andrew Cagney e2e0b3e57f 2005-02-11 Andrew Cagney <cagney@gnu.org>
Mark up error_no_arg, query, perror_with_name, complaint, and
	internal_error.
	* breakpoint.c, cp-abi.c, cp-namespace.c, cp-support.c: Update.
	* cris-tdep.c, dbxread.c, dictionary.c, dsrec.c: Update.
	* dummy-frame.c, dve3900-rom.c, dwarf2-frame.c, dwarf2expr.c: Update.
	* dwarf2read.c, dwarfread.c, elfread.c, event-loop.c: Update.
	* exceptions.c, exec.c, f-lang.c, findvar.c, fork-child.c: Update.
	* frame-unwind.c, frame.c, frv-linux-tdep.c, frv-tdep.c: Update.
	* gdb_assert.h, gdbarch.c, gdbtypes.c, gnu-nat.c: Update.
	* go32-nat.c, hppa-tdep.c, hppabsd-nat.c, hpread.c: Update.
	* i386-linux-nat.c, i386-nat.c, i386-tdep.c, i386bsd-nat.c: Update.
	* i386fbsd-nat.c, inf-ptrace.c, inf-ttrace.c, infcall.c: Update.
	* infcmd.c, inflow.c, infptrace.c, infrun.c, inftarg.c: Update.
	* interps.c, language.c, linespec.c, linux-nat.c: Update.
	* m32r-linux-nat.c, m68k-tdep.c, m68kbsd-nat.c: Update.
	* m68klinux-nat.c, m88kbsd-nat.c, macroexp.c, macroscope.c: Update.
	* macrotab.c, maint.c, mdebugread.c, memattr.c: Update.
	* mips-linux-tdep.c, mips-tdep.c, mips64obsd-nat.c: Update.
	* mipsnbsd-nat.c, mn10300-tdep.c, monitor.c, nto-procfs.c: Update.
	* objc-lang.c, objfiles.c, objfiles.h, ocd.c, osabi.c: Update.
	* parse.c, ppc-bdm.c, ppc-linux-nat.c, ppc-sysv-tdep.c: Update.
	* ppcnbsd-nat.c, ppcobsd-nat.c, printcmd.c, procfs.c: Update.
	* regcache.c, reggroups.c, remote-e7000.c, remote-mips.c: Update.
	* remote-rdp.c, remote-sds.c, remote-sim.c, remote-st.c: Update.
	* remote-utils.c, remote.c, rs6000-nat.c, rs6000-tdep.c: Update.
	* s390-nat.c, s390-tdep.c, sentinel-frame.c, serial.c: Update.
	* sh-tdep.c, sh3-rom.c, sh64-tdep.c, shnbsd-nat.c: Update.
	* solib-aix5.c, solib-svr4.c, solib.c, source.c: Update.
	* sparc-nat.c, stabsread.c, stack.c, symfile.c, symtab.c: Update.
	* symtab.h, target.c, tracepoint.c, ui-file.c, ui-out.c: Update.
	* utils.c, valops.c, valprint.c, vax-nat.c, vaxbsd-nat.c: Update.
	* win32-nat.c, xcoffread.c, xstormy16-tdep.c: Update.
	* cli/cli-cmds.c, cli/cli-logging.c, cli/cli-script.c: Update.
	* cli/cli-setshow.c, mi/mi-cmd-break.c, mi/mi-cmds.c: Update.
	* mi/mi-console.c, mi/mi-getopt.c, mi/mi-out.c: Update.
	* tui/tui-file.c, tui/tui-interp.c: Update.
2005-02-11 18:13:55 +00:00

359 lines
9.4 KiB
C

/* S390 native-dependent code for GDB, the GNU debugger.
Copyright 2001, 2003 Free Software Foundation, Inc
Contributed by D.J. Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com)
for IBM Deutschland Entwicklung GmbH, IBM Corporation.
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., 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA. */
#include "defs.h"
#include "tm.h"
#include "regcache.h"
#include "inferior.h"
#include "s390-tdep.h"
#include <asm/ptrace.h>
#include <sys/ptrace.h>
#include <asm/types.h>
#include <sys/procfs.h>
#include <sys/user.h>
#include <sys/ucontext.h>
/* Map registers to gregset/ptrace offsets.
These arrays are defined in s390-tdep.c. */
#ifdef __s390x__
#define regmap_gregset s390x_regmap_gregset
#else
#define regmap_gregset s390_regmap_gregset
#endif
#define regmap_fpregset s390_regmap_fpregset
/* When debugging a 32-bit executable running under a 64-bit kernel,
we have to fix up the 64-bit registers we get from the kernel
to make them look like 32-bit registers. */
#ifdef __s390x__
#define SUBOFF(i) \
((TARGET_PTR_BIT == 32 \
&& ((i) == S390_PSWA_REGNUM \
|| ((i) >= S390_R0_REGNUM && (i) <= S390_R15_REGNUM)))? 4 : 0)
#else
#define SUBOFF(i) 0
#endif
/* Fill GDB's register array with the general-purpose register values
in *REGP. */
void
supply_gregset (gregset_t *regp)
{
int i;
for (i = 0; i < S390_NUM_REGS; i++)
if (regmap_gregset[i] != -1)
regcache_raw_supply (current_regcache, i,
(char *)regp + regmap_gregset[i] + SUBOFF (i));
}
/* Fill register REGNO (if it is a general-purpose register) in
*REGP with the value in GDB's register array. If REGNO is -1,
do this for all registers. */
void
fill_gregset (gregset_t *regp, int regno)
{
int i;
for (i = 0; i < S390_NUM_REGS; i++)
if (regmap_gregset[i] != -1)
if (regno == -1 || regno == i)
regcache_raw_collect (current_regcache, i,
(char *)regp + regmap_gregset[i] + SUBOFF (i));
}
/* Fill GDB's register array with the floating-point register values
in *REGP. */
void
supply_fpregset (fpregset_t *regp)
{
int i;
for (i = 0; i < S390_NUM_REGS; i++)
if (regmap_fpregset[i] != -1)
regcache_raw_supply (current_regcache, i,
((char *)regp) + regmap_fpregset[i]);
}
/* Fill register REGNO (if it is a general-purpose register) in
*REGP with the value in GDB's register array. If REGNO is -1,
do this for all registers. */
void
fill_fpregset (fpregset_t *regp, int regno)
{
int i;
for (i = 0; i < S390_NUM_REGS; i++)
if (regmap_fpregset[i] != -1)
if (regno == -1 || regno == i)
regcache_raw_collect (current_regcache, i,
((char *)regp) + regmap_fpregset[i]);
}
/* Find the TID for the current inferior thread to use with ptrace. */
static int
s390_inferior_tid (void)
{
/* GNU/Linux LWP ID's are process ID's. */
int tid = TIDGET (inferior_ptid);
if (tid == 0)
tid = PIDGET (inferior_ptid); /* Not a threaded program. */
return tid;
}
/* Fetch all general-purpose registers from process/thread TID and
store their values in GDB's register cache. */
static void
fetch_regs (int tid)
{
gregset_t regs;
ptrace_area parea;
parea.len = sizeof (regs);
parea.process_addr = (addr_t) &regs;
parea.kernel_addr = offsetof (struct user_regs_struct, psw);
if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea) < 0)
perror_with_name (_("Couldn't get registers"));
supply_gregset (&regs);
}
/* Store all valid general-purpose registers in GDB's register cache
into the process/thread specified by TID. */
static void
store_regs (int tid, int regnum)
{
gregset_t regs;
ptrace_area parea;
parea.len = sizeof (regs);
parea.process_addr = (addr_t) &regs;
parea.kernel_addr = offsetof (struct user_regs_struct, psw);
if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea) < 0)
perror_with_name (_("Couldn't get registers"));
fill_gregset (&regs, regnum);
if (ptrace (PTRACE_POKEUSR_AREA, tid, (long) &parea) < 0)
perror_with_name (_("Couldn't write registers"));
}
/* Fetch all floating-point registers from process/thread TID and store
their values in GDB's register cache. */
static void
fetch_fpregs (int tid)
{
fpregset_t fpregs;
ptrace_area parea;
parea.len = sizeof (fpregs);
parea.process_addr = (addr_t) &fpregs;
parea.kernel_addr = offsetof (struct user_regs_struct, fp_regs);
if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea) < 0)
perror_with_name (_("Couldn't get floating point status"));
supply_fpregset (&fpregs);
}
/* Store all valid floating-point registers in GDB's register cache
into the process/thread specified by TID. */
static void
store_fpregs (int tid, int regnum)
{
fpregset_t fpregs;
ptrace_area parea;
parea.len = sizeof (fpregs);
parea.process_addr = (addr_t) &fpregs;
parea.kernel_addr = offsetof (struct user_regs_struct, fp_regs);
if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea) < 0)
perror_with_name (_("Couldn't get floating point status"));
fill_fpregset (&fpregs, regnum);
if (ptrace (PTRACE_POKEUSR_AREA, tid, (long) &parea) < 0)
perror_with_name (_("Couldn't write floating point status"));
}
/* Fetch register REGNUM from the child process. If REGNUM is -1, do
this for all registers. */
void
fetch_inferior_registers (int regnum)
{
int tid = s390_inferior_tid ();
if (regnum == -1
|| (regnum < S390_NUM_REGS && regmap_gregset[regnum] != -1))
fetch_regs (tid);
if (regnum == -1
|| (regnum < S390_NUM_REGS && regmap_fpregset[regnum] != -1))
fetch_fpregs (tid);
}
/* Store register REGNUM back into the child process. If REGNUM is
-1, do this for all registers. */
void
store_inferior_registers (int regnum)
{
int tid = s390_inferior_tid ();
if (regnum == -1
|| (regnum < S390_NUM_REGS && regmap_gregset[regnum] != -1))
store_regs (tid, regnum);
if (regnum == -1
|| (regnum < S390_NUM_REGS && regmap_fpregset[regnum] != -1))
store_fpregs (tid, regnum);
}
/* Hardware-assisted watchpoint handling. */
/* We maintain a list of all currently active watchpoints in order
to properly handle watchpoint removal.
The only thing we actually need is the total address space area
spanned by the watchpoints. */
struct watch_area
{
struct watch_area *next;
CORE_ADDR lo_addr;
CORE_ADDR hi_addr;
};
static struct watch_area *watch_base = NULL;
int
s390_stopped_by_watchpoint (void)
{
per_lowcore_bits per_lowcore;
ptrace_area parea;
/* Speed up common case. */
if (!watch_base)
return 0;
parea.len = sizeof (per_lowcore);
parea.process_addr = (addr_t) & per_lowcore;
parea.kernel_addr = offsetof (struct user_regs_struct, per_info.lowcore);
if (ptrace (PTRACE_PEEKUSR_AREA, s390_inferior_tid (), &parea) < 0)
perror_with_name (_("Couldn't retrieve watchpoint status"));
return per_lowcore.perc_storage_alteration == 1
&& per_lowcore.perc_store_real_address == 0;
}
static void
s390_fix_watch_points (void)
{
int tid = s390_inferior_tid ();
per_struct per_info;
ptrace_area parea;
CORE_ADDR watch_lo_addr = (CORE_ADDR)-1, watch_hi_addr = 0;
struct watch_area *area;
for (area = watch_base; area; area = area->next)
{
watch_lo_addr = min (watch_lo_addr, area->lo_addr);
watch_hi_addr = max (watch_hi_addr, area->hi_addr);
}
parea.len = sizeof (per_info);
parea.process_addr = (addr_t) & per_info;
parea.kernel_addr = offsetof (struct user_regs_struct, per_info);
if (ptrace (PTRACE_PEEKUSR_AREA, tid, &parea) < 0)
perror_with_name (_("Couldn't retrieve watchpoint status"));
if (watch_base)
{
per_info.control_regs.bits.em_storage_alteration = 1;
per_info.control_regs.bits.storage_alt_space_ctl = 1;
}
else
{
per_info.control_regs.bits.em_storage_alteration = 0;
per_info.control_regs.bits.storage_alt_space_ctl = 0;
}
per_info.starting_addr = watch_lo_addr;
per_info.ending_addr = watch_hi_addr;
if (ptrace (PTRACE_POKEUSR_AREA, tid, &parea) < 0)
perror_with_name (_("Couldn't modify watchpoint status"));
}
int
s390_insert_watchpoint (CORE_ADDR addr, int len)
{
struct watch_area *area = xmalloc (sizeof (struct watch_area));
if (!area)
return -1;
area->lo_addr = addr;
area->hi_addr = addr + len - 1;
area->next = watch_base;
watch_base = area;
s390_fix_watch_points ();
return 0;
}
int
s390_remove_watchpoint (CORE_ADDR addr, int len)
{
struct watch_area *area, **parea;
for (parea = &watch_base; *parea; parea = &(*parea)->next)
if ((*parea)->lo_addr == addr
&& (*parea)->hi_addr == addr + len - 1)
break;
if (!*parea)
{
fprintf_unfiltered (gdb_stderr,
"Attempt to remove nonexistent watchpoint.\n");
return -1;
}
area = *parea;
*parea = area->next;
xfree (area);
s390_fix_watch_points ();
return 0;
}
int
kernel_u_size (void)
{
return sizeof (struct user);
}