/* S390 native-dependent code for GDB, the GNU debugger.
- Copyright 2001 Free Software Foundation, Inc
+ Copyright (C) 2001, 2003, 2004, 2005, 2006
+ 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
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. */
+ Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA. */
#include "defs.h"
-#include "tm.h"
#include "regcache.h"
+#include "inferior.h"
+#include "target.h"
+#include "linux-nat.h"
+
+#include "s390-tdep.h"
+
#include <asm/ptrace.h>
#include <sys/ptrace.h>
-#include <asm/processor.h>
#include <asm/types.h>
#include <sys/procfs.h>
-#include <sys/user.h>
-#include <value.h>
#include <sys/ucontext.h>
-#ifndef offsetof
-#define offsetof(type,member) ((size_t) &((type *)0)->member)
-#endif
-int
-s390_register_u_addr (int blockend, int regnum)
-{
- int retval;
-
- if (regnum >= S390_GP0_REGNUM && regnum <= S390_GP_LAST_REGNUM)
- retval = PT_GPR0 + ((regnum - S390_GP0_REGNUM) * S390_GPR_SIZE);
- else if (regnum >= S390_PSWM_REGNUM && regnum <= S390_PC_REGNUM)
- retval = PT_PSWMASK + ((regnum - S390_PSWM_REGNUM) * S390_PSW_MASK_SIZE);
- else if (regnum == S390_FPC_REGNUM)
- retval = PT_FPC;
- else if (regnum >= S390_FP0_REGNUM && regnum <= S390_FPLAST_REGNUM)
- retval =
-#if CONFIG_ARCH_S390X
- PT_FPR0
+/* Map registers to gregset/ptrace offsets.
+ These arrays are defined in s390-tdep.c. */
+
+#ifdef __s390x__
+#define regmap_gregset s390x_regmap_gregset
#else
- PT_FPR0_HI
+#define regmap_gregset s390_regmap_gregset
#endif
- + ((regnum - S390_FP0_REGNUM) * S390_FPR_SIZE);
- else if (regnum >= S390_FIRST_ACR && regnum <= S390_LAST_ACR)
- retval = PT_ACR0 + ((regnum - S390_FIRST_ACR) * S390_ACR_SIZE);
- else if (regnum >= (S390_FIRST_CR + 9) && regnum <= (S390_FIRST_CR + 11))
- retval = PT_CR_9 + ((regnum - (S390_FIRST_CR + 9)) * S390_CR_SIZE);
- else
- {
-#ifdef GDBSERVER
- error ("s390_register_u_addr invalid regnum %s %d regnum=%d",
- __FILE__, (int) __LINE__, regnum);
+
+#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
- internal_error (__FILE__, __LINE__,
- "s390_register_u_addr invalid regnum regnum=%d",
- regnum);
+#define SUBOFF(i) 0
#endif
- retval = 0;
- }
- return retval + blockend;
+
+
+/* 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));
}
-#ifndef GDBSERVER
-/* watch_areas are required if you put 2 or more watchpoints on the same
- address or overlapping areas gdb will call us to delete the watchpoint
- more than once when we try to delete them.
- attempted reference counting to reduce the number of areas unfortunately
- they didn't shrink when areas had to be split overlapping occurs. */
-struct watch_area;
-typedef struct watch_area watch_area;
+/* 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) ®s;
+ 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 (®s);
+}
+
+/* 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) ®s;
+ 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 (®s, 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. */
+static void
+s390_linux_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. */
+static void
+s390_linux_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
{
- watch_area *next;
+ struct watch_area *next;
CORE_ADDR lo_addr;
CORE_ADDR hi_addr;
};
-static watch_area *watch_base = NULL;
-int watch_area_cnt = 0;
-static CORE_ADDR watch_lo_addr = 0, watch_hi_addr = 0;
-
-
+static struct watch_area *watch_base = NULL;
-CORE_ADDR
-s390_stopped_by_watchpoint (int pid)
+static 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);
- ptrace (PTRACE_PEEKUSR_AREA, pid, &parea);
- return ((per_lowcore.perc_storage_alteration == 1) &&
- (per_lowcore.perc_store_real_address == 0));
-}
+ 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;
+}
-void
-s390_fix_watch_points (int pid)
+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 = PT_CR_9;
- ptrace (PTRACE_PEEKUSR_AREA, pid, &parea);
- /* The kernel automatically sets the psw for per depending */
- /* on whether the per control registers are set for event recording */
- /* & sets cr9 & cr10 appropriately also */
- if (watch_area_cnt)
+ 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;
}
per_info.starting_addr = watch_lo_addr;
per_info.ending_addr = watch_hi_addr;
- ptrace (PTRACE_POKEUSR_AREA, pid, &parea);
+
+ if (ptrace (PTRACE_POKEUSR_AREA, tid, &parea) < 0)
+ perror_with_name (_("Couldn't modify watchpoint status"));
}
-int
-s390_insert_watchpoint (int pid, CORE_ADDR addr, int len, int rw)
+static int
+s390_insert_watchpoint (CORE_ADDR addr, int len, int type)
{
- CORE_ADDR hi_addr = addr + len - 1;
- watch_area *newarea = (watch_area *) xmalloc (sizeof (watch_area));
-
-
- if (newarea)
- {
- newarea->next = watch_base;
- watch_base = newarea;
- watch_lo_addr = min (watch_lo_addr, addr);
- watch_hi_addr = max (watch_hi_addr, hi_addr);
- newarea->lo_addr = addr;
- newarea->hi_addr = hi_addr;
- if (watch_area_cnt == 0)
- {
- watch_lo_addr = newarea->lo_addr;
- watch_hi_addr = newarea->hi_addr;
- }
- watch_area_cnt++;
- s390_fix_watch_points (pid);
- }
- return newarea ? 0 : -1;
+ 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 (int pid, CORE_ADDR addr, int len)
+static int
+s390_remove_watchpoint (CORE_ADDR addr, int len, int type)
{
- watch_area *curr = watch_base, *prev, *matchCurr;
- CORE_ADDR hi_addr = addr + len - 1;
- CORE_ADDR watch_second_lo_addr = 0xffffffffUL, watch_second_hi_addr = 0;
- int lo_addr_ref_cnt, hi_addr_ref_cnt;
- prev = matchCurr = NULL;
- lo_addr_ref_cnt = (addr == watch_lo_addr);
- hi_addr_ref_cnt = (addr == watch_hi_addr);
- while (curr)
- {
- if (matchCurr == NULL)
- {
- if (curr->lo_addr == addr && curr->hi_addr == hi_addr)
- {
- matchCurr = curr;
- if (prev)
- prev->next = curr->next;
- else
- watch_base = curr->next;
- }
- prev = curr;
- }
- if (lo_addr_ref_cnt)
- {
- if (watch_lo_addr == curr->lo_addr)
- lo_addr_ref_cnt++;
- if (curr->lo_addr > watch_lo_addr &&
- curr->lo_addr < watch_second_lo_addr)
- watch_second_lo_addr = curr->lo_addr;
- }
- if (hi_addr_ref_cnt)
- {
- if (watch_hi_addr == curr->hi_addr)
- hi_addr_ref_cnt++;
- if (curr->hi_addr < watch_hi_addr &&
- curr->hi_addr > watch_second_hi_addr)
- watch_second_hi_addr = curr->hi_addr;
- }
- curr = curr->next;
- }
- if (matchCurr)
- {
- xfree (matchCurr);
- watch_area_cnt--;
- if (watch_area_cnt)
- {
- if (lo_addr_ref_cnt == 2)
- watch_lo_addr = watch_second_lo_addr;
- if (hi_addr_ref_cnt == 2)
- watch_hi_addr = watch_second_hi_addr;
- }
- else
- {
- watch_lo_addr = watch_hi_addr = 0;
- }
- s390_fix_watch_points (pid);
- return 0;
- }
- else
+ 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 in s390_remove_watchpoint\n");
+ "Attempt to remove nonexistent watchpoint.\n");
return -1;
}
-}
-int
-kernel_u_size (void)
-{
- return sizeof (struct user);
-}
+ area = *parea;
+ *parea = area->next;
+ xfree (area);
+ s390_fix_watch_points ();
+ return 0;
+}
-#if (defined (S390_FP0_REGNUM) && defined (HAVE_FPREGSET_T) && defined(HAVE_SYS_PROCFS_H) && defined (HAVE_GREGSET_T))
-void
-supply_gregset (gregset_t * gregsetp)
+static int
+s390_can_use_hw_breakpoint (int type, int cnt, int othertype)
{
- int regi;
- greg_t *gregp = (greg_t *) gregsetp;
-
- supply_register (S390_PSWM_REGNUM, (char *) &gregp[S390_PSWM_REGNUM]);
- supply_register (S390_PC_REGNUM, (char *) &gregp[S390_PC_REGNUM]);
- for (regi = 0; regi < S390_NUM_GPRS; regi++)
- supply_register (S390_GP0_REGNUM + regi,
- (char *) &gregp[S390_GP0_REGNUM + regi]);
- for (regi = 0; regi < S390_NUM_ACRS; regi++)
- supply_register (S390_FIRST_ACR + regi,
- (char *) &gregp[S390_FIRST_ACR + regi]);
- /* unfortunately this isn't in gregsetp */
- for (regi = 0; regi < S390_NUM_CRS; regi++)
- supply_register (S390_FIRST_CR + regi, NULL);
+ return 1;
}
-
-void
-supply_fpregset (fpregset_t * fpregsetp)
+static int
+s390_region_ok_for_hw_watchpoint (CORE_ADDR addr, int cnt)
{
- int regi;
+ return 1;
+}
- supply_register (S390_FPC_REGNUM, (char *) &fpregsetp->fpc);
- for (regi = 0; regi < S390_NUM_FPRS; regi++)
- supply_register (S390_FP0_REGNUM + regi, (char *) &fpregsetp->fprs[regi]);
-}
+void _initialize_s390_nat (void);
void
-fill_gregset (gregset_t * gregsetp, int regno)
+_initialize_s390_nat (void)
{
- int regi;
- greg_t *gregp = (greg_t *) gregsetp;
+ struct target_ops *t;
- if (regno < 0)
- {
- regcache_collect (S390_PSWM_REGNUM, &gregp[S390_PSWM_REGNUM]);
- regcache_collect (S390_PC_REGNUM, &gregp[S390_PC_REGNUM]);
- for (regi = 0; regi < S390_NUM_GPRS; regi++)
- regcache_collect (S390_GP0_REGNUM + regi,
- &gregp[S390_GP0_REGNUM + regi]);
- for (regi = 0; regi < S390_NUM_ACRS; regi++)
- regcache_collect (S390_FIRST_ACR + regi,
- &gregp[S390_FIRST_ACR + regi]);
- }
- else if (regno >= S390_PSWM_REGNUM && regno <= S390_LAST_ACR)
- regcache_collect (regno, &gregp[regno]);
-}
+ /* Fill in the generic GNU/Linux methods. */
+ t = linux_target ();
-/* Given a pointer to a floating point register set in /proc format
- (fpregset_t *), update the register specified by REGNO from gdb's idea
- of the current floating point register set. If REGNO is -1, update
- them all. */
+ /* Add our register access methods. */
+ t->to_fetch_registers = s390_linux_fetch_inferior_registers;
+ t->to_store_registers = s390_linux_store_inferior_registers;
-void
-fill_fpregset (fpregset_t * fpregsetp, int regno)
-{
- int regi;
+ /* Add our watchpoint methods. */
+ t->to_can_use_hw_breakpoint = s390_can_use_hw_breakpoint;
+ t->to_region_ok_for_hw_watchpoint = s390_region_ok_for_hw_watchpoint;
+ t->to_have_continuable_watchpoint = 1;
+ t->to_stopped_by_watchpoint = s390_stopped_by_watchpoint;
+ t->to_insert_watchpoint = s390_insert_watchpoint;
+ t->to_remove_watchpoint = s390_remove_watchpoint;
- if (regno < 0)
- {
- regcache_collect (S390_FPC_REGNUM, &fpregsetp->fpc);
- for (regi = 0; regi < S390_NUM_FPRS; regi++)
- regcache_collect (S390_FP0_REGNUM + regi, &fpregsetp->fprs[regi]);
- }
- else if (regno == S390_FPC_REGNUM)
- regcache_collect (S390_FPC_REGNUM, &fpregsetp->fpc);
- else if (regno >= S390_FP0_REGNUM && regno <= S390_FPLAST_REGNUM)
- regcache_collect (regno, &fpregsetp->fprs[regno - S390_FP0_REGNUM]);
+ /* Register the target. */
+ linux_nat_add_target (t);
}
-
-
-#else
-#error "There are a few possibilities here"
-#error "1) You aren't compiling for linux & don't need a core dumps to work."
-#error "2) The header files sys/elf.h sys/user.h sys/ptrace.h & sys/procfs.h"
-#error "libc files are inconsistent with linux/include/asm-s390/"
-#error "3) you didn't do a completely clean build & delete config.cache."
-#endif
-#endif /* GDBSERVER */
projects / deliverable / binutils-gdb.git / blobdiff