| /* S390 native-dependent code for GDB, the GNU debugger. |
| Copyright 2001 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 <asm/ptrace.h> |
| #include <sys/ptrace.h> |
| #include <asm/processor.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 |
| #else |
| PT_FPR0_HI |
| #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); |
| #else |
| internal_error (__FILE__, __LINE__, |
| "s390_register_u_addr invalid regnum regnum=%d", |
| regnum); |
| #endif |
| retval = 0; |
| } |
| return retval + blockend; |
| } |
| |
| #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; |
| struct watch_area |
| { |
| 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; |
| |
| |
| |
| CORE_ADDR |
| s390_stopped_by_watchpoint (int pid) |
| { |
| per_lowcore_bits per_lowcore; |
| ptrace_area parea; |
| |
| 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)); |
| } |
| |
| |
| void |
| s390_fix_watch_points (int pid) |
| { |
| per_struct per_info; |
| ptrace_area parea; |
| |
| 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) |
| { |
| 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; |
| ptrace (PTRACE_POKEUSR_AREA, pid, &parea); |
| } |
| |
| int |
| s390_insert_watchpoint (int pid, CORE_ADDR addr, int len, int rw) |
| { |
| 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; |
| } |
| |
| |
| int |
| s390_remove_watchpoint (int pid, CORE_ADDR addr, int len) |
| { |
| 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 |
| { |
| fprintf_unfiltered (gdb_stderr, |
| "Attempt to remove nonexistent watchpoint in s390_remove_watchpoint\n"); |
| return -1; |
| } |
| } |
| |
| int |
| kernel_u_size (void) |
| { |
| return sizeof (struct user); |
| } |
| |
| |
| #if (defined (S390_FP0_REGNUM) && defined (HAVE_FPREGSET_T) && defined(HAVE_SYS_PROCFS_H) && defined (HAVE_GREGSET_T)) |
| void |
| supply_gregset (gregset_t * gregsetp) |
| { |
| 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); |
| } |
| |
| |
| void |
| supply_fpregset (fpregset_t * fpregsetp) |
| { |
| int regi; |
| |
| 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 |
| fill_gregset (gregset_t * gregsetp, int regno) |
| { |
| int regi; |
| greg_t *gregp = (greg_t *) gregsetp; |
| |
| 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]); |
| } |
| |
| /* 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. */ |
| |
| void |
| fill_fpregset (fpregset_t * fpregsetp, int regno) |
| { |
| int regi; |
| |
| 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]); |
| } |
| |
| |
| #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 */ |