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3ecc0ae2c0
`supply_register'. (The last change already added the dependency of s390-nat.o on regcache.h. Oops.)
311 lines
8.7 KiB
C
311 lines
8.7 KiB
C
/* S390 native-dependent code for GDB, the GNU debugger.
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Copyright 2001 Free Software Foundation, Inc
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Contributed by D.J. Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com)
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for IBM Deutschland Entwicklung GmbH, IBM Corporation.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA. */
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#include "defs.h"
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#include "tm.h"
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#include "regcache.h"
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#include <asm/ptrace.h>
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#include <sys/ptrace.h>
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#include <asm/processor.h>
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#include <sys/procfs.h>
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#include <sys/user.h>
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#include <value.h>
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#include <sys/ucontext.h>
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#ifndef offsetof
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#define offsetof(type,member) ((size_t) &((type *)0)->member)
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#endif
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int
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s390_register_u_addr (int blockend, int regnum)
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{
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int retval;
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if (regnum >= S390_GP0_REGNUM && regnum <= S390_GP_LAST_REGNUM)
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retval = PT_GPR0 + ((regnum - S390_GP0_REGNUM) * S390_GPR_SIZE);
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else if (regnum >= S390_PSWM_REGNUM && regnum <= S390_PC_REGNUM)
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retval = PT_PSWMASK + ((regnum - S390_PSWM_REGNUM) * S390_PSW_MASK_SIZE);
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else if (regnum == S390_FPC_REGNUM)
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retval = PT_FPC;
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else if (regnum >= S390_FP0_REGNUM && regnum <= S390_FPLAST_REGNUM)
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retval =
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#if CONFIG_ARCH_S390X
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PT_FPR0
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#else
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PT_FPR0_HI
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#endif
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+ ((regnum - S390_FP0_REGNUM) * S390_FPR_SIZE);
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else if (regnum >= S390_FIRST_ACR && regnum <= S390_LAST_ACR)
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retval = PT_ACR0 + ((regnum - S390_FIRST_ACR) * S390_ACR_SIZE);
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else if (regnum >= (S390_FIRST_CR + 9) && regnum <= (S390_FIRST_CR + 11))
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retval = PT_CR_9 + ((regnum - (S390_FIRST_CR + 9)) * S390_CR_SIZE);
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else
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{
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#ifdef GDBSERVER
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error ("s390_register_u_addr invalid regnum %s %d regnum=%d",
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__FILE__, (int) __LINE__, regnum);
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#else
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internal_error (__FILE__, __LINE__,
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"s390_register_u_addr invalid regnum regnum=%d",
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regnum);
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#endif
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retval = 0;
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}
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return retval + blockend;
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}
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#ifndef GDBSERVER
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/* watch_areas are required if you put 2 or more watchpoints on the same
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address or overlapping areas gdb will call us to delete the watchpoint
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more than once when we try to delete them.
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attempted reference counting to reduce the number of areas unfortunately
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they didn't shrink when areas had to be split overlapping occurs. */
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struct watch_area;
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typedef struct watch_area watch_area;
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struct watch_area
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{
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watch_area *next;
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CORE_ADDR lo_addr;
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CORE_ADDR hi_addr;
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};
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static watch_area *watch_base = NULL;
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int watch_area_cnt = 0;
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static CORE_ADDR watch_lo_addr = 0, watch_hi_addr = 0;
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CORE_ADDR
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s390_stopped_by_watchpoint (int pid)
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{
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per_lowcore_bits per_lowcore;
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ptrace_area parea;
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parea.len = sizeof (per_lowcore);
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parea.process_addr = (addr_t) & per_lowcore;
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parea.kernel_addr = offsetof (struct user_regs_struct, per_info.lowcore);
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ptrace (PTRACE_PEEKUSR_AREA, pid, &parea);
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return ((per_lowcore.perc_storage_alteration == 1) &&
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(per_lowcore.perc_store_real_address == 0));
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}
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void
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s390_fix_watch_points (int pid)
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{
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per_struct per_info;
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ptrace_area parea;
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parea.len = sizeof (per_info);
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parea.process_addr = (addr_t) & per_info;
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parea.kernel_addr = PT_CR_9;
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ptrace (PTRACE_PEEKUSR_AREA, pid, &parea);
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/* The kernel automatically sets the psw for per depending */
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/* on whether the per control registers are set for event recording */
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/* & sets cr9 & cr10 appropriately also */
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if (watch_area_cnt)
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{
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per_info.control_regs.bits.em_storage_alteration = 1;
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per_info.control_regs.bits.storage_alt_space_ctl = 1;
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}
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else
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{
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per_info.control_regs.bits.em_storage_alteration = 0;
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per_info.control_regs.bits.storage_alt_space_ctl = 0;
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}
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per_info.starting_addr = watch_lo_addr;
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per_info.ending_addr = watch_hi_addr;
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ptrace (PTRACE_POKEUSR_AREA, pid, &parea);
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}
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int
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s390_insert_watchpoint (int pid, CORE_ADDR addr, int len, int rw)
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{
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CORE_ADDR hi_addr = addr + len - 1;
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watch_area *newarea = (watch_area *) xmalloc (sizeof (watch_area));
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if (newarea)
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{
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newarea->next = watch_base;
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watch_base = newarea;
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watch_lo_addr = min (watch_lo_addr, addr);
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watch_hi_addr = max (watch_hi_addr, hi_addr);
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newarea->lo_addr = addr;
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newarea->hi_addr = hi_addr;
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if (watch_area_cnt == 0)
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{
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watch_lo_addr = newarea->lo_addr;
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watch_hi_addr = newarea->hi_addr;
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}
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watch_area_cnt++;
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s390_fix_watch_points (pid);
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}
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return newarea ? 0 : -1;
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}
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int
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s390_remove_watchpoint (int pid, CORE_ADDR addr, int len)
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{
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watch_area *curr = watch_base, *prev, *matchCurr;
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CORE_ADDR hi_addr = addr + len - 1;
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CORE_ADDR watch_second_lo_addr = 0xffffffffUL, watch_second_hi_addr = 0;
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int lo_addr_ref_cnt, hi_addr_ref_cnt;
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prev = matchCurr = NULL;
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lo_addr_ref_cnt = (addr == watch_lo_addr);
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hi_addr_ref_cnt = (addr == watch_hi_addr);
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while (curr)
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{
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if (matchCurr == NULL)
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{
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if (curr->lo_addr == addr && curr->hi_addr == hi_addr)
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{
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matchCurr = curr;
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if (prev)
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prev->next = curr->next;
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else
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watch_base = curr->next;
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}
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prev = curr;
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}
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if (lo_addr_ref_cnt)
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{
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if (watch_lo_addr == curr->lo_addr)
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lo_addr_ref_cnt++;
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if (curr->lo_addr > watch_lo_addr &&
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curr->lo_addr < watch_second_lo_addr)
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watch_second_lo_addr = curr->lo_addr;
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}
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if (hi_addr_ref_cnt)
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{
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if (watch_hi_addr == curr->hi_addr)
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hi_addr_ref_cnt++;
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if (curr->hi_addr < watch_hi_addr &&
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curr->hi_addr > watch_second_hi_addr)
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watch_second_hi_addr = curr->hi_addr;
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}
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curr = curr->next;
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}
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if (matchCurr)
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{
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xfree (matchCurr);
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watch_area_cnt--;
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if (watch_area_cnt)
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{
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if (lo_addr_ref_cnt == 2)
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watch_lo_addr = watch_second_lo_addr;
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if (hi_addr_ref_cnt == 2)
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watch_hi_addr = watch_second_hi_addr;
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}
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else
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{
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watch_lo_addr = watch_hi_addr = 0;
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}
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s390_fix_watch_points (pid);
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return 0;
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}
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else
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{
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fprintf_unfiltered (gdb_stderr,
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"Attempt to remove nonexistent watchpoint in s390_remove_watchpoint\n");
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return -1;
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}
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}
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int
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kernel_u_size (void)
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{
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return sizeof (struct user);
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}
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#if (defined (S390_FP0_REGNUM) && defined (HAVE_FPREGSET_T) && defined(HAVE_SYS_PROCFS_H) && defined (HAVE_GREGSET_T))
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void
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supply_gregset (gregset_t * gregsetp)
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{
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int regi;
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greg_t *gregp = (greg_t *) gregsetp;
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supply_register (S390_PSWM_REGNUM, (char *) &gregp[S390_PSWM_REGNUM]);
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supply_register (S390_PC_REGNUM, (char *) &gregp[S390_PC_REGNUM]);
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for (regi = 0; regi < S390_NUM_GPRS; regi++)
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supply_register (S390_GP0_REGNUM + regi,
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(char *) &gregp[S390_GP0_REGNUM + regi]);
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for (regi = 0; regi < S390_NUM_ACRS; regi++)
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supply_register (S390_FIRST_ACR + regi,
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(char *) &gregp[S390_FIRST_ACR + regi]);
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/* unfortunately this isn't in gregsetp */
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for (regi = 0; regi < S390_NUM_CRS; regi++)
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supply_register (S390_FIRST_CR + regi, NULL);
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}
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void
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supply_fpregset (fpregset_t * fpregsetp)
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{
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int regi;
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supply_register (S390_FPC_REGNUM, (char *) &fpregsetp->fpc);
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for (regi = 0; regi < S390_NUM_FPRS; regi++)
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supply_register (S390_FP0_REGNUM + regi, (char *) &fpregsetp->fprs[regi]);
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}
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void
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fill_gregset (gregset_t * gregsetp, int regno)
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{
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greg_t *gregp = (greg_t *) gregsetp;
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if (regno >= S390_FIRST_CR && regno <= S390_LAST_CR)
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supply_register (regno, NULL);
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else if (regno != -1)
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supply_register (regno, (char *) &gregp[regno]);
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else
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supply_gregset (gregsetp);
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}
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/* Given a pointer to a floating point register set in /proc format
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(fpregset_t *), update the register specified by REGNO from gdb's idea
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of the current floating point register set. If REGNO is -1, update
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them all. */
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void
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fill_fpregset (fpregset_t * fpregsetp, int regno)
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{
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if (regno == -1)
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supply_fpregset (fpregsetp);
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else
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supply_register (regno,
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&((char *) fpregsetp)[REGISTER_BYTE (regno) -
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REGISTER_BYTE (S390_FPC_REGNUM)]);
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}
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#else
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#error "There are a few possibilities here"
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#error "1) You aren't compiling for linux & don't need a core dumps to work."
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#error "2) The header files sys/elf.h sys/user.h sys/ptrace.h & sys/procfs.h"
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#error "libc files are inconsistent with linux/include/asm-s390/"
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#error "3) you didn't do a completely clean build & delete config.cache."
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#endif
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#endif /* GDBSERVER */
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