| /* Native-dependent code for LynxOS. |
| |
| Copyright (C) 1993, 1994, 1995, 1996, 1999, 2000, 2001, 2003 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 |
| (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., 51 Franklin Street, Fifth Floor, |
| Boston, MA 02110-1301, USA. */ |
| |
| #include "defs.h" |
| #include "frame.h" |
| #include "inferior.h" |
| #include "target.h" |
| #include "gdbcore.h" |
| #include "regcache.h" |
| |
| #include <sys/ptrace.h> |
| #Include "gdb_wait.h" |
| #include <sys/fpp.h> |
| |
| static unsigned long registers_addr (int pid); |
| static void fetch_core_registers (char *, unsigned, int, CORE_ADDR); |
| |
| #define X(ENTRY)(offsetof(struct econtext, ENTRY)) |
| |
| #ifdef I386 |
| /* Mappings from tm-i386v.h */ |
| |
| static int regmap[] = |
| { |
| X (eax), |
| X (ecx), |
| X (edx), |
| X (ebx), |
| X (esp), /* sp */ |
| X (ebp), /* fp */ |
| X (esi), |
| X (edi), |
| X (eip), /* pc */ |
| X (flags), /* ps */ |
| X (cs), |
| X (ss), |
| X (ds), |
| X (es), |
| X (ecode), /* Lynx doesn't give us either fs or gs, so */ |
| X (fault), /* we just substitute these two in the hopes |
| that they are useful. */ |
| }; |
| #endif /* I386 */ |
| |
| #ifdef M68K |
| /* Mappings from tm-m68k.h */ |
| |
| static int regmap[] = |
| { |
| X (regs[0]), /* d0 */ |
| X (regs[1]), /* d1 */ |
| X (regs[2]), /* d2 */ |
| X (regs[3]), /* d3 */ |
| X (regs[4]), /* d4 */ |
| X (regs[5]), /* d5 */ |
| X (regs[6]), /* d6 */ |
| X (regs[7]), /* d7 */ |
| X (regs[8]), /* a0 */ |
| X (regs[9]), /* a1 */ |
| X (regs[10]), /* a2 */ |
| X (regs[11]), /* a3 */ |
| X (regs[12]), /* a4 */ |
| X (regs[13]), /* a5 */ |
| X (regs[14]), /* fp */ |
| offsetof (st_t, usp) - offsetof (st_t, ec), /* sp */ |
| X (status), /* ps */ |
| X (pc), |
| |
| X (fregs[0 * 3]), /* fp0 */ |
| X (fregs[1 * 3]), /* fp1 */ |
| X (fregs[2 * 3]), /* fp2 */ |
| X (fregs[3 * 3]), /* fp3 */ |
| X (fregs[4 * 3]), /* fp4 */ |
| X (fregs[5 * 3]), /* fp5 */ |
| X (fregs[6 * 3]), /* fp6 */ |
| X (fregs[7 * 3]), /* fp7 */ |
| |
| X (fcregs[0]), /* fpcontrol */ |
| X (fcregs[1]), /* fpstatus */ |
| X (fcregs[2]), /* fpiaddr */ |
| X (ssw), /* fpcode */ |
| X (fault), /* fpflags */ |
| }; |
| #endif /* M68K */ |
| |
| #ifdef SPARC |
| /* Mappings from tm-sparc.h */ |
| |
| #define FX(ENTRY)(offsetof(struct fcontext, ENTRY)) |
| |
| static int regmap[] = |
| { |
| -1, /* g0 */ |
| X (g1), |
| X (g2), |
| X (g3), |
| X (g4), |
| -1, /* g5->g7 aren't saved by Lynx */ |
| -1, |
| -1, |
| |
| X (o[0]), |
| X (o[1]), |
| X (o[2]), |
| X (o[3]), |
| X (o[4]), |
| X (o[5]), |
| X (o[6]), /* sp */ |
| X (o[7]), /* ra */ |
| |
| -1, -1, -1, -1, -1, -1, -1, -1, /* l0 -> l7 */ |
| |
| -1, -1, -1, -1, -1, -1, -1, -1, /* i0 -> i7 */ |
| |
| FX (f.fregs[0]), /* f0 */ |
| FX (f.fregs[1]), |
| FX (f.fregs[2]), |
| FX (f.fregs[3]), |
| FX (f.fregs[4]), |
| FX (f.fregs[5]), |
| FX (f.fregs[6]), |
| FX (f.fregs[7]), |
| FX (f.fregs[8]), |
| FX (f.fregs[9]), |
| FX (f.fregs[10]), |
| FX (f.fregs[11]), |
| FX (f.fregs[12]), |
| FX (f.fregs[13]), |
| FX (f.fregs[14]), |
| FX (f.fregs[15]), |
| FX (f.fregs[16]), |
| FX (f.fregs[17]), |
| FX (f.fregs[18]), |
| FX (f.fregs[19]), |
| FX (f.fregs[20]), |
| FX (f.fregs[21]), |
| FX (f.fregs[22]), |
| FX (f.fregs[23]), |
| FX (f.fregs[24]), |
| FX (f.fregs[25]), |
| FX (f.fregs[26]), |
| FX (f.fregs[27]), |
| FX (f.fregs[28]), |
| FX (f.fregs[29]), |
| FX (f.fregs[30]), |
| FX (f.fregs[31]), |
| |
| X (y), |
| X (psr), |
| X (wim), |
| X (tbr), |
| X (pc), |
| X (npc), |
| FX (fsr), /* fpsr */ |
| -1, /* cpsr */ |
| }; |
| #endif /* SPARC */ |
| |
| #ifdef rs6000 |
| |
| static int regmap[] = |
| { |
| X (iregs[0]), /* r0 */ |
| X (iregs[1]), |
| X (iregs[2]), |
| X (iregs[3]), |
| X (iregs[4]), |
| X (iregs[5]), |
| X (iregs[6]), |
| X (iregs[7]), |
| X (iregs[8]), |
| X (iregs[9]), |
| X (iregs[10]), |
| X (iregs[11]), |
| X (iregs[12]), |
| X (iregs[13]), |
| X (iregs[14]), |
| X (iregs[15]), |
| X (iregs[16]), |
| X (iregs[17]), |
| X (iregs[18]), |
| X (iregs[19]), |
| X (iregs[20]), |
| X (iregs[21]), |
| X (iregs[22]), |
| X (iregs[23]), |
| X (iregs[24]), |
| X (iregs[25]), |
| X (iregs[26]), |
| X (iregs[27]), |
| X (iregs[28]), |
| X (iregs[29]), |
| X (iregs[30]), |
| X (iregs[31]), |
| |
| X (fregs[0]), /* f0 */ |
| X (fregs[1]), |
| X (fregs[2]), |
| X (fregs[3]), |
| X (fregs[4]), |
| X (fregs[5]), |
| X (fregs[6]), |
| X (fregs[7]), |
| X (fregs[8]), |
| X (fregs[9]), |
| X (fregs[10]), |
| X (fregs[11]), |
| X (fregs[12]), |
| X (fregs[13]), |
| X (fregs[14]), |
| X (fregs[15]), |
| X (fregs[16]), |
| X (fregs[17]), |
| X (fregs[18]), |
| X (fregs[19]), |
| X (fregs[20]), |
| X (fregs[21]), |
| X (fregs[22]), |
| X (fregs[23]), |
| X (fregs[24]), |
| X (fregs[25]), |
| X (fregs[26]), |
| X (fregs[27]), |
| X (fregs[28]), |
| X (fregs[29]), |
| X (fregs[30]), |
| X (fregs[31]), |
| |
| X (srr0), /* IAR (PC) */ |
| X (srr1), /* MSR (PS) */ |
| X (cr), /* CR */ |
| X (lr), /* LR */ |
| X (ctr), /* CTR */ |
| X (xer), /* XER */ |
| X (mq) /* MQ */ |
| }; |
| |
| #endif /* rs6000 */ |
| |
| #if defined (I386) || defined (M68K) || defined (rs6000) |
| |
| /* Return the offset relative to the start of the per-thread data to the |
| saved context block. */ |
| |
| static unsigned long |
| registers_addr (int pid) |
| { |
| CORE_ADDR stblock; |
| int ecpoff = offsetof (st_t, ecp); |
| CORE_ADDR ecp; |
| |
| errno = 0; |
| stblock = (CORE_ADDR) ptrace (PTRACE_THREADUSER, pid, (PTRACE_ARG3_TYPE) 0, |
| 0); |
| if (errno) |
| perror_with_name ("ptrace(PTRACE_THREADUSER)"); |
| |
| ecp = (CORE_ADDR) ptrace (PTRACE_PEEKTHREAD, pid, (PTRACE_ARG3_TYPE) ecpoff, |
| 0); |
| if (errno) |
| perror_with_name ("ptrace(PTRACE_PEEKTHREAD)"); |
| |
| return ecp - stblock; |
| } |
| |
| /* Fetch one or more registers from the inferior. REGNO == -1 to get |
| them all. We actually fetch more than requested, when convenient, |
| marking them as valid so we won't fetch them again. */ |
| |
| void |
| fetch_inferior_registers (int regno) |
| { |
| int reglo, reghi; |
| int i; |
| unsigned long ecp; |
| |
| if (regno == -1) |
| { |
| reglo = 0; |
| reghi = NUM_REGS - 1; |
| } |
| else |
| reglo = reghi = regno; |
| |
| ecp = registers_addr (PIDGET (inferior_ptid)); |
| |
| { |
| char buf[MAX_REGISTER_SIZE]; |
| for (regno = reglo; regno <= reghi; regno++) |
| { |
| int ptrace_fun = PTRACE_PEEKTHREAD; |
| |
| #ifdef M68K |
| ptrace_fun = regno == SP_REGNUM ? PTRACE_PEEKUSP : PTRACE_PEEKTHREAD; |
| #endif |
| |
| for (i = 0; i < register_size (current_gdbarch, regno); i += sizeof (int)) |
| { |
| unsigned int reg; |
| |
| errno = 0; |
| reg = ptrace (ptrace_fun, PIDGET (inferior_ptid), |
| (PTRACE_ARG3_TYPE) (ecp + regmap[regno] + i), 0); |
| if (errno) |
| perror_with_name ("ptrace(PTRACE_PEEKUSP)"); |
| |
| *(int *) &buf[i] = reg; |
| } |
| regcache_raw_supply (current_regcache, regno, buf); |
| } |
| } |
| } |
| |
| /* Store our register values back into the inferior. |
| If REGNO is -1, do this for all registers. |
| Otherwise, REGNO specifies which register (so we can save time). */ |
| |
| void |
| store_inferior_registers (int regno) |
| { |
| int reglo, reghi; |
| int i; |
| unsigned long ecp; |
| |
| if (regno == -1) |
| { |
| reglo = 0; |
| reghi = NUM_REGS - 1; |
| } |
| else |
| reglo = reghi = regno; |
| |
| ecp = registers_addr (PIDGET (inferior_ptid)); |
| |
| for (regno = reglo; regno <= reghi; regno++) |
| { |
| int ptrace_fun = PTRACE_POKEUSER; |
| |
| if (CANNOT_STORE_REGISTER (regno)) |
| continue; |
| |
| #ifdef M68K |
| ptrace_fun = regno == SP_REGNUM ? PTRACE_POKEUSP : PTRACE_POKEUSER; |
| #endif |
| |
| for (i = 0; i < register_size (current_gdbarch, regno); i += sizeof (int)) |
| { |
| unsigned int reg; |
| |
| reg = *(unsigned int *) &deprecated_registers[DEPRECATED_REGISTER_BYTE (regno) + i]; |
| |
| errno = 0; |
| ptrace (ptrace_fun, PIDGET (inferior_ptid), |
| (PTRACE_ARG3_TYPE) (ecp + regmap[regno] + i), reg); |
| if (errno) |
| perror_with_name ("ptrace(PTRACE_POKEUSP)"); |
| } |
| } |
| } |
| #endif /* defined (I386) || defined (M68K) || defined (rs6000) */ |
| |
| /* Wait for child to do something. Return pid of child, or -1 in case |
| of error; store status through argument pointer OURSTATUS. */ |
| |
| ptid_t |
| child_wait (ptid_t ptid, struct target_waitstatus *ourstatus) |
| { |
| int save_errno; |
| int thread; |
| union wait status; |
| int pid; |
| |
| while (1) |
| { |
| int sig; |
| |
| set_sigint_trap (); /* Causes SIGINT to be passed on to the |
| attached process. */ |
| pid = wait (&status); |
| |
| save_errno = errno; |
| |
| clear_sigint_trap (); |
| |
| if (pid == -1) |
| { |
| if (save_errno == EINTR) |
| continue; |
| fprintf_unfiltered (gdb_stderr, "Child process unexpectedly missing: %s.\n", |
| safe_strerror (save_errno)); |
| /* Claim it exited with unknown signal. */ |
| ourstatus->kind = TARGET_WAITKIND_SIGNALLED; |
| ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN; |
| return -1; |
| } |
| |
| if (pid != PIDGET (inferior_ptid)) /* Some other process?!? */ |
| continue; |
| |
| thread = status.w_tid; /* Get thread id from status */ |
| |
| /* Initial thread value can only be acquired via wait, so we have to |
| resort to this hack. */ |
| |
| if (TIDGET (inferior_ptid) == 0 && thread != 0) |
| { |
| inferior_ptid = MERGEPID (PIDGET (inferior_ptid), thread); |
| add_thread (inferior_ptid); |
| } |
| |
| ptid = BUILDPID (pid, thread); |
| |
| /* We've become a single threaded process again. */ |
| if (thread == 0) |
| inferior_ptid = ptid; |
| |
| /* Check for thread creation. */ |
| if (WIFSTOPPED (status) |
| && WSTOPSIG (status) == SIGTRAP |
| && !in_thread_list (ptid)) |
| { |
| int realsig; |
| |
| realsig = ptrace (PTRACE_GETTRACESIG, PIDGET (ptid), |
| (PTRACE_ARG3_TYPE) 0, 0); |
| |
| if (realsig == SIGNEWTHREAD) |
| { |
| /* It's a new thread notification. We don't want to much with |
| realsig -- the code in wait_for_inferior expects SIGTRAP. */ |
| ourstatus->kind = TARGET_WAITKIND_SPURIOUS; |
| ourstatus->value.sig = TARGET_SIGNAL_0; |
| return ptid; |
| } |
| else |
| error ("Signal for unknown thread was not SIGNEWTHREAD"); |
| } |
| |
| /* Check for thread termination. */ |
| else if (WIFSTOPPED (status) |
| && WSTOPSIG (status) == SIGTRAP |
| && in_thread_list (ptid)) |
| { |
| int realsig; |
| |
| realsig = ptrace (PTRACE_GETTRACESIG, PIDGET (ptid), |
| (PTRACE_ARG3_TYPE) 0, 0); |
| |
| if (realsig == SIGTHREADEXIT) |
| { |
| ptrace (PTRACE_CONT, PIDGET (ptid), (PTRACE_ARG3_TYPE) 0, 0); |
| continue; |
| } |
| } |
| |
| #ifdef SPARC |
| /* SPARC Lynx uses an byte reversed wait status; we must use the |
| host macros to access it. These lines just a copy of |
| store_waitstatus. We can't use CHILD_SPECIAL_WAITSTATUS |
| because target.c can't include the Lynx <sys/wait.h>. */ |
| if (WIFEXITED (status)) |
| { |
| ourstatus->kind = TARGET_WAITKIND_EXITED; |
| ourstatus->value.integer = WEXITSTATUS (status); |
| } |
| else if (!WIFSTOPPED (status)) |
| { |
| ourstatus->kind = TARGET_WAITKIND_SIGNALLED; |
| ourstatus->value.sig = |
| target_signal_from_host (WTERMSIG (status)); |
| } |
| else |
| { |
| ourstatus->kind = TARGET_WAITKIND_STOPPED; |
| ourstatus->value.sig = |
| target_signal_from_host (WSTOPSIG (status)); |
| } |
| #else |
| store_waitstatus (ourstatus, status.w_status); |
| #endif |
| |
| return ptid; |
| } |
| } |
| |
| /* Return nonzero if the given thread is still alive. */ |
| int |
| child_thread_alive (ptid_t ptid) |
| { |
| int pid = PIDGET (ptid); |
| |
| /* Arggh. Apparently pthread_kill only works for threads within |
| the process that calls pthread_kill. |
| |
| We want to avoid the lynx signal extensions as they simply don't |
| map well to the generic gdb interface we want to keep. |
| |
| All we want to do is determine if a particular thread is alive; |
| it appears as if we can just make a harmless thread specific |
| ptrace call to do that. */ |
| return (ptrace (PTRACE_THREADUSER, pid, 0, 0) != -1); |
| } |
| |
| /* Resume execution of the inferior process. |
| If STEP is nonzero, single-step it. |
| If SIGNAL is nonzero, give it that signal. */ |
| |
| void |
| child_resume (ptid_t ptid, int step, enum target_signal signal) |
| { |
| int func; |
| int pid = PIDGET (ptid); |
| |
| errno = 0; |
| |
| /* If pid == -1, then we want to step/continue all threads, else |
| we only want to step/continue a single thread. */ |
| if (pid == -1) |
| { |
| pid = PIDGET (inferior_ptid); |
| func = step ? PTRACE_SINGLESTEP : PTRACE_CONT; |
| } |
| else |
| func = step ? PTRACE_SINGLESTEP_ONE : PTRACE_CONT_ONE; |
| |
| |
| /* An address of (PTRACE_ARG3_TYPE)1 tells ptrace to continue from where |
| it was. (If GDB wanted it to start some other way, we have already |
| written a new PC value to the child.) |
| |
| If this system does not support PT_STEP, a higher level function will |
| have called single_step() to transmute the step request into a |
| continue request (by setting breakpoints on all possible successor |
| instructions), so we don't have to worry about that here. */ |
| |
| ptrace (func, pid, (PTRACE_ARG3_TYPE) 1, target_signal_to_host (signal)); |
| |
| if (errno) |
| perror_with_name ("ptrace"); |
| } |
| |
| /* Convert a Lynx process ID to a string. Returns the string in a static |
| buffer. */ |
| |
| char * |
| child_pid_to_str (ptid_t ptid) |
| { |
| static char buf[40]; |
| |
| sprintf (buf, "process %d thread %d", PIDGET (ptid), TIDGET (ptid)); |
| |
| return buf; |
| } |
| |
| /* Extract the register values out of the core file and store |
| them where `read_register' will find them. |
| |
| CORE_REG_SECT points to the register values themselves, read into memory. |
| CORE_REG_SIZE is the size of that area. |
| WHICH says which set of registers we are handling (0 = int, 2 = float |
| on machines where they are discontiguous). |
| REG_ADDR is the offset from u.u_ar0 to the register values relative to |
| core_reg_sect. This is used with old-fashioned core files to |
| locate the registers in a large upage-plus-stack ".reg" section. |
| Original upage address X is at location core_reg_sect+x+reg_addr. |
| */ |
| |
| static void |
| fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which, |
| CORE_ADDR reg_addr) |
| { |
| struct st_entry s; |
| unsigned int regno; |
| |
| for (regno = 0; regno < NUM_REGS; regno++) |
| if (regmap[regno] != -1) |
| regcache_raw_supply (current_regcache, regno, |
| core_reg_sect + offsetof (st_t, ec) + regmap[regno]); |
| |
| #ifdef SPARC |
| /* Fetching this register causes all of the I & L regs to be read from the |
| stack and validated. */ |
| |
| fetch_inferior_registers (I0_REGNUM); |
| #endif |
| } |
| |
| |
| /* Register that we are able to handle lynx core file formats. |
| FIXME: is this really bfd_target_unknown_flavour? */ |
| |
| static struct core_fns lynx_core_fns = |
| { |
| bfd_target_unknown_flavour, /* core_flavour */ |
| default_check_format, /* check_format */ |
| default_core_sniffer, /* core_sniffer */ |
| fetch_core_registers, /* core_read_registers */ |
| NULL /* next */ |
| }; |
| |
| void |
| _initialize_core_lynx (void) |
| { |
| deprecated_add_core_fns (&lynx_core_fns); |
| } |