-/* Machine-dependent hooks for the unix child process stratum. This
- code is for the HP PA-RISC cpu.
+/* Machine-dependent hooks for the unix child process stratum, for HPUX PA-RISC.
- Copyright 1986, 1987, 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
+ Copyright 1986, 1987, 1989, 1990, 1991, 1992, 1993
+ Free Software Foundation, Inc.
Contributed by the Center for Software Science at the
University of Utah (pa-gdb-bugs@cs.utah.edu).
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. */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "defs.h"
#include "inferior.h"
+#include "target.h"
+#include <sys/ptrace.h>
+#include "gdbcore.h"
-#ifndef PT_ATTACH
-#define PT_ATTACH PTRACE_ATTACH
-#endif
-#ifndef PT_DETACH
-#define PT_DETACH PTRACE_DETACH
-#endif
+extern CORE_ADDR text_end;
-/* This function simply calls ptrace with the given arguments.
- It exists so that all calls to ptrace are isolated in this
- machine-dependent file. */
-#ifdef WANT_NATIVE_TARGET
-int
-call_ptrace (request, pid, addr, data)
- int request, pid;
- PTRACE_ARG3_TYPE addr;
- int data;
-{
- return ptrace (request, pid, addr, data, 0);
-}
-#endif /* WANT_NATIVE_TARGET */
-
-#ifdef DEBUG_PTRACE
-/* For the rest of the file, use an extra level of indirection */
-/* This lets us breakpoint usefully on call_ptrace. */
-#define ptrace call_ptrace
-#endif
-
-void
-kill_inferior ()
-{
- if (inferior_pid == 0)
- return;
- ptrace (PT_EXIT, inferior_pid, (PTRACE_ARG3_TYPE) 0, 0, 0); /* PT_EXIT = PT_KILL ? */
- wait ((int *)0);
- target_mourn_inferior ();
-}
-
-#ifdef ATTACH_DETACH
-/* Nonzero if we are debugging an attached process rather than
- an inferior. */
-extern int attach_flag;
-
-/* Start debugging the process whose number is PID. */
-int
-attach (pid)
- int pid;
-{
- errno = 0;
- ptrace (PT_ATTACH, pid, (PTRACE_ARG3_TYPE) 0, 0, 0);
- if (errno)
- perror_with_name ("ptrace");
- attach_flag = 1;
- return pid;
-}
-
-/* Stop debugging the process whose number is PID
- and continue it with signal number SIGNAL.
- SIGNAL = 0 means just continue it. */
-
-void
-detach (signal)
- int signal;
-{
- errno = 0;
- ptrace (PT_DETACH, inferior_pid, (PTRACE_ARG3_TYPE) 1, signal, 0);
- if (errno)
- perror_with_name ("ptrace");
- attach_flag = 0;
-}
-#endif /* ATTACH_DETACH */
-
-/* Fetch all registers, or just one, from the child process. */
+static void fetch_register PARAMS ((int));
void
fetch_inferior_registers (regno)
fetch_register (regno);
}
-/* Registers we shouldn't try to store. */
-#if !defined (CANNOT_STORE_REGISTER)
-#define CANNOT_STORE_REGISTER(regno) 0
-#endif
-
/* 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). */
char buf[80];
extern char registers[];
register int i;
-
unsigned int offset = U_REGS_OFFSET;
+ int scratch;
if (regno >= 0)
{
+ if (CANNOT_STORE_REGISTER (regno))
+ return;
regaddr = register_addr (regno, offset);
- for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof(int))
- {
- errno = 0;
- ptrace (PT_WUAREA, inferior_pid, (PTRACE_ARG3_TYPE) regaddr,
- *(int *) ®isters[REGISTER_BYTE (regno) + i], 0);
- if (errno != 0)
- {
- sprintf (buf, "writing register number %d(%d)", regno, i);
- perror_with_name (buf);
- }
- regaddr += sizeof(int);
- }
+ errno = 0;
+ if (regno == PCOQ_HEAD_REGNUM || regno == PCOQ_TAIL_REGNUM)
+ {
+ scratch = *(int *) ®isters[REGISTER_BYTE (regno)] | 0x3;
+ call_ptrace (PT_WUREGS, inferior_pid, (PTRACE_ARG3_TYPE) regaddr,
+ scratch);
+ if (errno != 0)
+ {
+ /* Error, even if attached. Failing to write these two
+ registers is pretty serious. */
+ sprintf (buf, "writing register number %d", regno);
+ perror_with_name (buf);
+ }
+ }
+ else
+ for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof(int))
+ {
+ errno = 0;
+ call_ptrace (PT_WUREGS, inferior_pid, (PTRACE_ARG3_TYPE) regaddr,
+ *(int *) ®isters[REGISTER_BYTE (regno) + i]);
+ if (errno != 0)
+ {
+ /* Warning, not error, in case we are attached; sometimes the
+ kernel doesn't let us at the registers. */
+ char *err = safe_strerror (errno);
+ char *msg = alloca (strlen (err) + 128);
+ sprintf (msg, "writing register %s: %s",
+ reg_names[regno], err);
+ warning (msg);
+ return;
+ }
+ regaddr += sizeof(int);
+ }
}
else
- {
- for (regno = 0; regno < NUM_REGS; regno++)
- {
- if (CANNOT_STORE_REGISTER (regno))
- continue;
- regaddr = register_addr (regno, offset);
- for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof(int))
- {
- errno = 0;
- ptrace (PT_WUAREA, inferior_pid, (PTRACE_ARG3_TYPE) regaddr,
- *(int *) ®isters[REGISTER_BYTE (regno) + i], 0);
- if (errno != 0)
- {
- sprintf (buf, "writing register number %d(%d)", regno, i);
- perror_with_name (buf);
- }
- regaddr += sizeof(int);
- }
- }
- }
- return;
-}
-
-/* KERNEL_U_ADDR is the amount to subtract from u.u_ar0
- to get the offset in the core file of the register values. */
-#if defined (KERNEL_U_ADDR_BSD)
-/* Get kernel_u_addr using BSD-style nlist(). */
-CORE_ADDR kernel_u_addr;
-
-#include <a.out.gnu.h> /* For struct nlist */
-
-void
-_initialize_kernel_u_addr ()
-{
- struct nlist names[2];
-
- names[0].n_un.n_name = "_u";
- names[1].n_un.n_name = NULL;
- if (nlist ("/vmunix", names) == 0)
- kernel_u_addr = names[0].n_value;
- else
- fatal ("Unable to get kernel u area address.");
-}
-#endif /* KERNEL_U_ADDR_BSD. */
-
-#if defined (KERNEL_U_ADDR_HPUX)
-/* Get kernel_u_addr using HPUX-style nlist(). */
-CORE_ADDR kernel_u_addr;
-
-struct hpnlist {
- char * n_name;
- long n_value;
- unsigned char n_type;
- unsigned char n_length;
- short n_almod;
- short n_unused;
-};
-static struct hpnlist nl[] = {{ "_u", -1, }, { (char *) 0, }};
-
-/* read the value of the u area from the hp-ux kernel */
-void _initialize_kernel_u_addr ()
-{
- struct user u;
- nlist ("/hp-ux", &nl);
- kernel_u_addr = nl[0].n_value;
+ for (regno = 0; regno < NUM_REGS; regno++)
+ store_inferior_registers (regno);
}
-#endif /* KERNEL_U_ADDR_HPUX. */
-
-#if !defined (offsetof)
-#define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER)
-#endif
-
-/* U_REGS_OFFSET is the offset of the registers within the u area. */
-#if !defined (U_REGS_OFFSET)
-#define U_REGS_OFFSET \
- ptrace (PT_READ_U, inferior_pid, \
- (PTRACE_ARG3_TYPE) (offsetof (struct user, u_ar0)), 0, 0) \
- - KERNEL_U_ADDR
-#endif
-
-/* Registers we shouldn't try to fetch. */
-#if !defined (CANNOT_FETCH_REGISTER)
-#define CANNOT_FETCH_REGISTER(regno) 0
-#endif
/* Fetch one register. */
{
register unsigned int regaddr;
char buf[MAX_REGISTER_RAW_SIZE];
- char mess[128]; /* For messages */
register int i;
/* Offset of registers within the u area. */
unsigned int offset;
- if (CANNOT_FETCH_REGISTER (regno))
- {
- bzero (buf, REGISTER_RAW_SIZE (regno)); /* Supply zeroes */
- supply_register (regno, buf);
- return;
- }
-
offset = U_REGS_OFFSET;
regaddr = register_addr (regno, offset);
for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
{
errno = 0;
- *(int *) &buf[i] = ptrace (PT_RUREGS, inferior_pid,
- (PTRACE_ARG3_TYPE) regaddr, 0, 0);
+ *(int *) &buf[i] = call_ptrace (PT_RUREGS, inferior_pid,
+ (PTRACE_ARG3_TYPE) regaddr, 0);
regaddr += sizeof (int);
if (errno != 0)
{
- sprintf (mess, "reading register %s (#%d)", reg_names[regno], regno);
- perror_with_name (mess);
+ /* Warning, not error, in case we are attached; sometimes the
+ kernel doesn't let us at the registers. */
+ char *err = safe_strerror (errno);
+ char *msg = alloca (strlen (err) + 128);
+ sprintf (msg, "reading register %s: %s", reg_names[regno], err);
+ warning (msg);
+ goto error_exit;
}
}
+ if (regno == PCOQ_HEAD_REGNUM || regno == PCOQ_TAIL_REGNUM)
+ buf[3] &= ~0x3;
supply_register (regno, buf);
+ error_exit:;
}
-
-
-/* Resume execution of the inferior process.
- If STEP is nonzero, single-step it.
- If SIGNAL is nonzero, give it that signal. */
-
-void
-child_resume (step, signal)
- int step;
- int signal;
-{
- errno = 0;
-
- /* 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 (step)
- ptrace (PT_SINGLE, inferior_pid, (PTRACE_ARG3_TYPE) 1, signal, 0);
- else
- ptrace (PT_CONTIN, inferior_pid, (PTRACE_ARG3_TYPE) 1, signal, 0);
-
- if (errno)
- perror_with_name ("ptrace");
-}
-
-/* NOTE! I tried using PTRACE_READDATA, etc., to read and write memory
- in the NEW_SUN_PTRACE case.
- It ought to be straightforward. But it appears that writing did
- not write the data that I specified. I cannot understand where
- it got the data that it actually did write. */
-
/* Copy LEN bytes to or from inferior's memory starting at MEMADDR
to debugger memory starting at MYADDR. Copy to inferior if
WRITE is nonzero.
if (addr != memaddr || len < (int)sizeof (int)) {
/* Need part of initial word -- fetch it. */
- buffer[0] = ptrace (PT_RIUSER, inferior_pid,
- (PTRACE_ARG3_TYPE) addr, 0, 0);
+ buffer[0] = call_ptrace (addr < text_end ? PT_RIUSER : PT_RDUSER,
+ inferior_pid, (PTRACE_ARG3_TYPE) addr, 0);
}
if (count > 1) /* FIXME, avoid if even boundary */
{
buffer[count - 1]
- = ptrace (PT_RIUSER, inferior_pid,
+ = call_ptrace (addr < text_end ? PT_RIUSER : PT_RDUSER, inferior_pid,
(PTRACE_ARG3_TYPE) (addr + (count - 1) * sizeof (int)),
- 0, 0);
+ 0);
}
/* Copy data to be written over corresponding part of buffer */
- bcopy (myaddr, (char *) buffer + (memaddr & (sizeof (int) - 1)), len);
+ memcpy ((char *) buffer + (memaddr & (sizeof (int) - 1)), myaddr, len);
/* Write the entire buffer. */
for (i = 0; i < count; i++, addr += sizeof (int))
{
-#if 0
/* The HP-UX kernel crashes if you use PT_WDUSER to write into the text
segment. FIXME -- does it work to write into the data segment using
WIUSER, or do these idiots really expect us to figure out which segment
the address is in, so we can use a separate system call for it??! */
errno = 0;
- ptrace (PT_WDUSER, inferior_pid, (PTRACE_ARG3_TYPE) addr,
- buffer[i], 0);
- if (errno)
-#endif
- {
- /* Using the appropriate one (I or D) is necessary for
- Gould NP1, at least. */
- errno = 0;
- ptrace (PT_WIUSER, inferior_pid, (PTRACE_ARG3_TYPE) addr,
- buffer[i], 0);
- }
+ call_ptrace (addr < text_end ? PT_WIUSER : PT_WDUSER, inferior_pid,
+ (PTRACE_ARG3_TYPE) addr,
+ buffer[i]);
if (errno)
return 0;
}
for (i = 0; i < count; i++, addr += sizeof (int))
{
errno = 0;
- buffer[i] = ptrace (PT_RIUSER, inferior_pid,
- (PTRACE_ARG3_TYPE) addr, 0, 0);
+ buffer[i] = call_ptrace (addr < text_end ? PT_RIUSER : PT_RDUSER,
+ inferior_pid, (PTRACE_ARG3_TYPE) addr, 0);
if (errno)
return 0;
QUIT;
}
/* Copy appropriate bytes out of the buffer. */
- bcopy ((char *) buffer + (memaddr & (sizeof (int) - 1)), myaddr, len);
+ memcpy (myaddr, (char *) buffer + (memaddr & (sizeof (int) - 1)), len);
}
return len;
}
-
projects / deliverable / binutils-gdb.git / blobdiff