X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gdb%2Flynx-nat.c;h=38bd6d3ddfb4047cad7d6120306b71bd1b64ff9b;hb=e1e9e218c189882084a89fdee655a0a523efbaf8;hp=28bb9767ac0c47295783da9d8c9d46ed51218840;hpb=67ac97591175936a06cc1ef1df228746edcdb545;p=deliverable%2Fbinutils-gdb.git diff --git a/gdb/lynx-nat.c b/gdb/lynx-nat.c index 28bb9767ac..38bd6d3ddf 100644 --- a/gdb/lynx-nat.c +++ b/gdb/lynx-nat.c @@ -1,31 +1,35 @@ /* Native-dependent code for LynxOS. - Copyright 1993 Free Software Foundation, Inc. + Copyright 1993, 1994 Free Software Foundation, Inc. -This file is part of GDB. + 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 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. + 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ + 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 "frame.h" #include "inferior.h" #include "target.h" +#include "gdbcore.h" #include -#include "/usr/include/sys/wait.h" +#include +#include -static unsigned long registers_addr PARAMS ((int pid)); +static unsigned long registers_addr (int pid); +static void fetch_core_registers (char *, unsigned, int, CORE_ADDR); #define X(ENTRY)(offsetof(struct econtext, ENTRY)) @@ -34,88 +38,451 @@ static unsigned long registers_addr PARAMS ((int pid)); 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 + 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 +#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 */ + 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 +#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 */ + +#ifdef SPARC + +/* This routine handles some oddball cases for Sparc registers and LynxOS. + In partucular, it causes refs to G0, g5->7, and all fp regs to return zero. + It also handles knows where to find the I & L regs on the stack. */ + +void +fetch_inferior_registers (int regno) +{ + int whatregs = 0; + +#define WHATREGS_FLOAT 1 +#define WHATREGS_GEN 2 +#define WHATREGS_STACK 4 + + if (regno == -1) + whatregs = WHATREGS_FLOAT | WHATREGS_GEN | WHATREGS_STACK; + else if (regno >= L0_REGNUM && regno <= I7_REGNUM) + whatregs = WHATREGS_STACK; + else if (regno >= FP0_REGNUM && regno < FP0_REGNUM + 32) + whatregs = WHATREGS_FLOAT; + else + whatregs = WHATREGS_GEN; + + if (whatregs & WHATREGS_GEN) + { + struct econtext ec; /* general regs */ + char buf[MAX_REGISTER_RAW_SIZE]; + int retval; + int i; + + errno = 0; + retval = ptrace (PTRACE_GETREGS, inferior_pid, (PTRACE_ARG3_TYPE) & ec, + 0); + if (errno) + perror_with_name ("ptrace(PTRACE_GETREGS)"); + + memset (buf, 0, REGISTER_RAW_SIZE (G0_REGNUM)); + supply_register (G0_REGNUM, buf); + supply_register (TBR_REGNUM, (char *) &ec.tbr); + + memcpy (®isters[REGISTER_BYTE (G1_REGNUM)], &ec.g1, + 4 * REGISTER_RAW_SIZE (G1_REGNUM)); + for (i = G1_REGNUM; i <= G1_REGNUM + 3; i++) + register_valid[i] = 1; + + supply_register (PS_REGNUM, (char *) &ec.psr); + supply_register (Y_REGNUM, (char *) &ec.y); + supply_register (PC_REGNUM, (char *) &ec.pc); + supply_register (NPC_REGNUM, (char *) &ec.npc); + supply_register (WIM_REGNUM, (char *) &ec.wim); + + memcpy (®isters[REGISTER_BYTE (O0_REGNUM)], ec.o, + 8 * REGISTER_RAW_SIZE (O0_REGNUM)); + for (i = O0_REGNUM; i <= O0_REGNUM + 7; i++) + register_valid[i] = 1; + } + + if (whatregs & WHATREGS_STACK) + { + CORE_ADDR sp; + int i; + + sp = read_register (SP_REGNUM); + + target_read_memory (sp + FRAME_SAVED_I0, + ®isters[REGISTER_BYTE (I0_REGNUM)], + 8 * REGISTER_RAW_SIZE (I0_REGNUM)); + for (i = I0_REGNUM; i <= I7_REGNUM; i++) + register_valid[i] = 1; + + target_read_memory (sp + FRAME_SAVED_L0, + ®isters[REGISTER_BYTE (L0_REGNUM)], + 8 * REGISTER_RAW_SIZE (L0_REGNUM)); + for (i = L0_REGNUM; i <= L0_REGNUM + 7; i++) + register_valid[i] = 1; + } + + if (whatregs & WHATREGS_FLOAT) + { + struct fcontext fc; /* fp regs */ + int retval; + int i; + + errno = 0; + retval = ptrace (PTRACE_GETFPREGS, inferior_pid, (PTRACE_ARG3_TYPE) & fc, + 0); + if (errno) + perror_with_name ("ptrace(PTRACE_GETFPREGS)"); + + memcpy (®isters[REGISTER_BYTE (FP0_REGNUM)], fc.f.fregs, + 32 * REGISTER_RAW_SIZE (FP0_REGNUM)); + for (i = FP0_REGNUM; i <= FP0_REGNUM + 31; i++) + register_valid[i] = 1; + + supply_register (FPS_REGNUM, (char *) &fc.fsr); + } +} + +/* This routine handles storing of the I & L regs for the Sparc. The trick + here is that they actually live on the stack. The really tricky part is + that when changing the stack pointer, the I & L regs must be written to + where the new SP points, otherwise the regs will be incorrect when the + process is started up again. We assume that the I & L regs are valid at + this point. */ + +void +store_inferior_registers (int regno) +{ + int whatregs = 0; + + if (regno == -1) + whatregs = WHATREGS_FLOAT | WHATREGS_GEN | WHATREGS_STACK; + else if (regno >= L0_REGNUM && regno <= I7_REGNUM) + whatregs = WHATREGS_STACK; + else if (regno >= FP0_REGNUM && regno < FP0_REGNUM + 32) + whatregs = WHATREGS_FLOAT; + else if (regno == SP_REGNUM) + whatregs = WHATREGS_STACK | WHATREGS_GEN; + else + whatregs = WHATREGS_GEN; + + if (whatregs & WHATREGS_GEN) + { + struct econtext ec; /* general regs */ + int retval; + + ec.tbr = read_register (TBR_REGNUM); + memcpy (&ec.g1, ®isters[REGISTER_BYTE (G1_REGNUM)], + 4 * REGISTER_RAW_SIZE (G1_REGNUM)); + + ec.psr = read_register (PS_REGNUM); + ec.y = read_register (Y_REGNUM); + ec.pc = read_register (PC_REGNUM); + ec.npc = read_register (NPC_REGNUM); + ec.wim = read_register (WIM_REGNUM); + + memcpy (ec.o, ®isters[REGISTER_BYTE (O0_REGNUM)], + 8 * REGISTER_RAW_SIZE (O0_REGNUM)); + + errno = 0; + retval = ptrace (PTRACE_SETREGS, inferior_pid, (PTRACE_ARG3_TYPE) & ec, + 0); + if (errno) + perror_with_name ("ptrace(PTRACE_SETREGS)"); + } + + if (whatregs & WHATREGS_STACK) + { + int regoffset; + CORE_ADDR sp; + + sp = read_register (SP_REGNUM); + + if (regno == -1 || regno == SP_REGNUM) + { + if (!register_valid[L0_REGNUM + 5]) + internal_error (__FILE__, __LINE__, "failed internal consistency check"); + target_write_memory (sp + FRAME_SAVED_I0, + ®isters[REGISTER_BYTE (I0_REGNUM)], + 8 * REGISTER_RAW_SIZE (I0_REGNUM)); + + target_write_memory (sp + FRAME_SAVED_L0, + ®isters[REGISTER_BYTE (L0_REGNUM)], + 8 * REGISTER_RAW_SIZE (L0_REGNUM)); + } + else if (regno >= L0_REGNUM && regno <= I7_REGNUM) + { + if (!register_valid[regno]) + internal_error (__FILE__, __LINE__, "failed internal consistency check"); + if (regno >= L0_REGNUM && regno <= L0_REGNUM + 7) + regoffset = REGISTER_BYTE (regno) - REGISTER_BYTE (L0_REGNUM) + + FRAME_SAVED_L0; + else + regoffset = REGISTER_BYTE (regno) - REGISTER_BYTE (I0_REGNUM) + + FRAME_SAVED_I0; + target_write_memory (sp + regoffset, + ®isters[REGISTER_BYTE (regno)], + REGISTER_RAW_SIZE (regno)); + } + } + + if (whatregs & WHATREGS_FLOAT) + { + struct fcontext fc; /* fp regs */ + int retval; + +/* We read fcontext first so that we can get good values for fq_t... */ + errno = 0; + retval = ptrace (PTRACE_GETFPREGS, inferior_pid, (PTRACE_ARG3_TYPE) & fc, + 0); + if (errno) + perror_with_name ("ptrace(PTRACE_GETFPREGS)"); + + memcpy (fc.f.fregs, ®isters[REGISTER_BYTE (FP0_REGNUM)], + 32 * REGISTER_RAW_SIZE (FP0_REGNUM)); + + fc.fsr = read_register (FPS_REGNUM); + + errno = 0; + retval = ptrace (PTRACE_SETFPREGS, inferior_pid, (PTRACE_ARG3_TYPE) & fc, + 0); + if (errno) + perror_with_name ("ptrace(PTRACE_SETFPREGS)"); + } +} +#endif /* SPARC */ + +#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(pid) - int pid; +registers_addr (int pid) { CORE_ADDR stblock; - int ecpoff = offsetof(st_t, ecp); + int ecpoff = offsetof (st_t, ecp); CORE_ADDR ecp; errno = 0; - stblock = (CORE_ADDR) ptrace (PTRACE_THREADUSER, pid, (PTRACE_ARG3_TYPE)0, + stblock = (CORE_ADDR) ptrace (PTRACE_THREADUSER, pid, (PTRACE_ARG3_TYPE) 0, 0); if (errno) - perror_with_name ("registers_addr(PTRACE_THREADUSER)"); + perror_with_name ("ptrace(PTRACE_THREADUSER)"); - ecp = (CORE_ADDR) ptrace (PTRACE_PEEKTHREAD, pid, (PTRACE_ARG3_TYPE)ecpoff, + ecp = (CORE_ADDR) ptrace (PTRACE_PEEKTHREAD, pid, (PTRACE_ARG3_TYPE) ecpoff, 0); if (errno) - perror_with_name ("registers_addr(PTRACE_PEEKTHREAD)"); + perror_with_name ("ptrace(PTRACE_PEEKTHREAD)"); return ecp - stblock; } @@ -125,8 +492,7 @@ registers_addr(pid) marking them as valid so we won't fetch them again. */ void -fetch_inferior_registers (regno) - int regno; +fetch_inferior_registers (int regno) { int reglo, reghi; int i; @@ -147,7 +513,7 @@ fetch_inferior_registers (regno) char buf[MAX_REGISTER_RAW_SIZE]; int ptrace_fun = PTRACE_PEEKTHREAD; -#ifdef PTRACE_PEEKUSP +#ifdef M68K ptrace_fun = regno == SP_REGNUM ? PTRACE_PEEKUSP : PTRACE_PEEKTHREAD; #endif @@ -159,9 +525,9 @@ fetch_inferior_registers (regno) reg = ptrace (ptrace_fun, inferior_pid, (PTRACE_ARG3_TYPE) (ecp + regmap[regno] + i), 0); if (errno) - perror_with_name ("fetch_inferior_registers(ptrace)"); - - *(int *)&buf[i] = reg; + perror_with_name ("ptrace(PTRACE_PEEKUSP)"); + + *(int *) &buf[i] = reg; } supply_register (regno, buf); } @@ -171,9 +537,13 @@ fetch_inferior_registers (regno) If REGNO is -1, do this for all registers. Otherwise, REGNO specifies which register (so we can save time). */ +/* Registers we shouldn't try to store. */ +#if !defined (CANNOT_STORE_REGISTER) +#define CANNOT_STORE_REGISTER(regno) 0 +#endif + void -store_inferior_registers (regno) - int regno; +store_inferior_registers (int regno) { int reglo, reghi; int i; @@ -193,7 +563,10 @@ store_inferior_registers (regno) { int ptrace_fun = PTRACE_POKEUSER; -#ifdef PTRACE_POKEUSP + if (CANNOT_STORE_REGISTER (regno)) + continue; + +#ifdef M68K ptrace_fun = regno == SP_REGNUM ? PTRACE_POKEUSP : PTRACE_POKEUSER; #endif @@ -201,63 +574,61 @@ store_inferior_registers (regno) { unsigned int reg; - reg = *(unsigned int *)®isters[REGISTER_BYTE (regno) + i]; + reg = *(unsigned int *) ®isters[REGISTER_BYTE (regno) + i]; errno = 0; ptrace (ptrace_fun, inferior_pid, (PTRACE_ARG3_TYPE) (ecp + regmap[regno] + i), reg); if (errno) - perror_with_name ("PTRACE_POKEUSER"); + 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. */ int -child_wait (pid, status) - int pid; - struct target_waitstatus *ourstatus; +child_wait (int pid, struct target_waitstatus *ourstatus) { int save_errno; int thread; + union wait status; while (1) { int sig; - if (attach_flag) - set_sigint_trap(); /* Causes SIGINT to be passed on to the + set_sigint_trap (); /* Causes SIGINT to be passed on to the attached process. */ - pid = wait (status); + pid = wait (&status); + save_errno = errno; - if (attach_flag) - clear_sigint_trap(); + 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)); + 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_pid)) /* Some other process?!? */ + if (pid != PIDGET (inferior_pid)) /* Some other process?!? */ continue; -/* thread = WIFTID (*status);*/ - thread = *status >> 16; + 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. */ + resort to this hack. */ - if (TIDGET (inferior_pid) == 0) + if (TIDGET (inferior_pid) == 0 && thread != 0) { inferior_pid = BUILDPID (inferior_pid, thread); add_thread (inferior_pid); @@ -265,18 +636,135 @@ child_wait (pid, status) pid = BUILDPID (pid, thread); - store_waitstatus (ourstatus, status); + /* We've become a single threaded process again. */ + if (thread == 0) + inferior_pid = pid; + + /* Check for thread creation. */ + if (WIFSTOPPED (status) + && WSTOPSIG (status) == SIGTRAP + && !in_thread_list (pid)) + { + int realsig; + + realsig = ptrace (PTRACE_GETTRACESIG, pid, (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 pid; + } + else + error ("Signal for unknown thread was not SIGNEWTHREAD"); + } + + /* Check for thread termination. */ + else if (WIFSTOPPED (status) + && WSTOPSIG (status) == SIGTRAP + && in_thread_list (pid)) + { + int realsig; + + realsig = ptrace (PTRACE_GETTRACESIG, pid, (PTRACE_ARG3_TYPE) 0, 0); + + if (realsig == SIGTHREADEXIT) + { + ptrace (PTRACE_CONT, PIDGET (pid), (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 . */ + 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 pid; } } +/* Return nonzero if the given thread is still alive. */ +int +child_thread_alive (int pid) +{ + /* 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 (int pid, int step, enum target_signal signal) +{ + int func; + + 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 = inferior_pid; + 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 * -lynx_pid_to_str (pid) - int pid; +child_pid_to_str (int pid) { static char buf[40]; @@ -291,24 +779,48 @@ lynx_pid_to_str (pid) 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). + 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. + 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. */ -void -fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr) - char *core_reg_sect; - unsigned core_reg_size; - int which; - unsigned 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++) - supply_register (regno, core_reg_sect + offsetof (st_t, ec) - + regmap[regno]); + if (regmap[regno] != -1) + supply_register (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) +{ + add_core_fns (&lynx_core_fns); }