/* Native-dependent code for LynxOS.
- Copyright 1993, 1994 Free Software Foundation, Inc.
+ Copyright 1993, 1994, 1995, 1996, 1999, 2000, 2001
+ 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 "regcache.h"
#include <sys/ptrace.h>
#include <sys/wait.h>
+#include <sys/fpp.h>
-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))
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 = alloca (max_register_size (current_gdbarch));
+ int retval;
+ int i;
+
+ errno = 0;
+ retval = ptrace (PTRACE_GETREGS, PIDGET (inferior_ptid),
+ (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 (&deprecated_registers[REGISTER_BYTE (G1_REGNUM)], &ec.g1,
+ 4 * REGISTER_RAW_SIZE (G1_REGNUM));
+ for (i = G1_REGNUM; i <= G1_REGNUM + 3; i++)
+ deprecated_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 (&deprecated_registers[REGISTER_BYTE (O0_REGNUM)], ec.o,
+ 8 * REGISTER_RAW_SIZE (O0_REGNUM));
+ for (i = O0_REGNUM; i <= O0_REGNUM + 7; i++)
+ deprecated_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,
+ &deprecated_registers[REGISTER_BYTE (I0_REGNUM)],
+ 8 * REGISTER_RAW_SIZE (I0_REGNUM));
+ for (i = I0_REGNUM; i <= I7_REGNUM; i++)
+ deprecated_register_valid[i] = 1;
+
+ target_read_memory (sp + FRAME_SAVED_L0,
+ &deprecated_registers[REGISTER_BYTE (L0_REGNUM)],
+ 8 * REGISTER_RAW_SIZE (L0_REGNUM));
+ for (i = L0_REGNUM; i <= L0_REGNUM + 7; i++)
+ deprecated_register_valid[i] = 1;
+ }
+
+ if (whatregs & WHATREGS_FLOAT)
+ {
+ struct fcontext fc; /* fp regs */
+ int retval;
+ int i;
+
+ errno = 0;
+ retval = ptrace (PTRACE_GETFPREGS, PIDGET (inferior_ptid),
+ (PTRACE_ARG3_TYPE) & fc, 0);
+ if (errno)
+ perror_with_name ("ptrace(PTRACE_GETFPREGS)");
+
+ memcpy (&deprecated_registers[REGISTER_BYTE (FP0_REGNUM)], fc.f.fregs,
+ 32 * REGISTER_RAW_SIZE (FP0_REGNUM));
+ for (i = FP0_REGNUM; i <= FP0_REGNUM + 31; i++)
+ deprecated_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, &deprecated_registers[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, &deprecated_registers[REGISTER_BYTE (O0_REGNUM)],
+ 8 * REGISTER_RAW_SIZE (O0_REGNUM));
+
+ errno = 0;
+ retval = ptrace (PTRACE_SETREGS, PIDGET (inferior_ptid),
+ (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 (!deprecated_register_valid[L0_REGNUM + 5])
+ internal_error (__FILE__, __LINE__, "failed internal consistency check");
+ target_write_memory (sp + FRAME_SAVED_I0,
+ &deprecated_registers[REGISTER_BYTE (I0_REGNUM)],
+ 8 * REGISTER_RAW_SIZE (I0_REGNUM));
+
+ target_write_memory (sp + FRAME_SAVED_L0,
+ &deprecated_registers[REGISTER_BYTE (L0_REGNUM)],
+ 8 * REGISTER_RAW_SIZE (L0_REGNUM));
+ }
+ else if (regno >= L0_REGNUM && regno <= I7_REGNUM)
+ {
+ if (!deprecated_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,
+ &deprecated_registers[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, PIDGET (inferior_ptid),
+ (PTRACE_ARG3_TYPE) & fc, 0);
+ if (errno)
+ perror_with_name ("ptrace(PTRACE_GETFPREGS)");
+
+ memcpy (fc.f.fregs, &deprecated_registers[REGISTER_BYTE (FP0_REGNUM)],
+ 32 * REGISTER_RAW_SIZE (FP0_REGNUM));
+
+ fc.fsr = read_register (FPS_REGNUM);
+
+ errno = 0;
+ retval = ptrace (PTRACE_SETFPREGS, PIDGET (inferior_ptid),
+ (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;
}
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;
else
reglo = reghi = regno;
- ecp = registers_addr (inferior_pid);
-
- for (regno = reglo; regno <= reghi; regno++)
- {
- char buf[MAX_REGISTER_RAW_SIZE];
- int ptrace_fun = PTRACE_PEEKTHREAD;
+ ecp = registers_addr (PIDGET (inferior_ptid));
-#ifdef PTRACE_PEEKUSP
- ptrace_fun = regno == SP_REGNUM ? PTRACE_PEEKUSP : PTRACE_PEEKTHREAD;
+ {
+ char *buf = alloca (max_register_size (current_gdbarch));
+ 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_RAW_SIZE (regno); i += sizeof (int))
- {
- unsigned int reg;
-
- errno = 0;
- 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;
- }
- supply_register (regno, buf);
- }
+
+ for (i = 0; i < REGISTER_RAW_SIZE (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;
+ }
+ supply_register (regno, buf);
+ }
+ }
}
/* Store our register values back into the inferior.
Otherwise, REGNO specifies which register (so we can save time). */
void
-store_inferior_registers (regno)
- int regno;
+store_inferior_registers (int regno)
{
int reglo, reghi;
int i;
else
reglo = reghi = regno;
- ecp = registers_addr (inferior_pid);
+ ecp = registers_addr (PIDGET (inferior_ptid));
for (regno = reglo; regno <= reghi; 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
{
unsigned int reg;
- reg = *(unsigned int *)®isters[REGISTER_BYTE (regno) + i];
+ reg = *(unsigned int *) &deprecated_registers[REGISTER_BYTE (regno) + i];
errno = 0;
- ptrace (ptrace_fun, inferior_pid,
+ ptrace (ptrace_fun, PIDGET (inferior_ptid),
(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, ourstatus)
- int pid;
- struct target_waitstatus *ourstatus;
+ptid_t
+child_wait (ptid_t ptid, struct target_waitstatus *ourstatus)
{
int save_errno;
int thread;
- int status;
+ union wait status;
+ int pid;
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_ptid)) /* 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_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;
- if (TIDGET (inferior_pid) == 0)
+ /* Check for thread creation. */
+ if (WIFSTOPPED (status)
+ && WSTOPSIG (status) == SIGTRAP
+ && !in_thread_list (ptid))
{
- inferior_pid = BUILDPID (inferior_pid, thread);
- add_thread (inferior_pid);
+ 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");
}
- pid = BUILDPID (pid, thread);
+ /* 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. */
- store_waitstatus (ourstatus, status);
+void
+child_resume (ptid_t ptid, int step, enum target_signal signal)
+{
+ int func;
+ int pid = PIDGET (ptid);
+
+ errno = 0;
- return pid;
+ /* 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 *
-lynx_pid_to_str (pid)
- int pid;
+child_pid_to_str (ptid_t ptid)
{
static char buf[40];
- sprintf (buf, "process %d thread %d", PIDGET (pid), TIDGET (pid));
+ sprintf (buf, "process %d thread %d", PIDGET (ptid), TIDGET (ptid));
return buf;
}
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
+}
+\f
+
+/* 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);
}