#include "target.h"
#include <sys/ptrace.h>
-#ifdef FIVE_ARG_PTRACE
+/* Use an extra level of indirection for ptrace calls.
+ This lets us breakpoint usefully on call_ptrace. It also
+ allows us to pass an extra argument to ptrace without
+ using an ANSI-C specific macro. */
-/* Deal with HPUX 8.0 braindamage. */
-#define ptrace(a,b,c,d) ptrace(a,b,c,d,0)
-
-#endif
-
-#ifndef PT_ATTACH
-#define PT_ATTACH PTRACE_ATTACH
-#endif
-
-#ifndef PT_DETACH
-#define PT_DETACH PTRACE_DETACH
-#endif
-
-/* This function simply calls ptrace with the given arguments.
- It exists so that all calls to ptrace are isolated in this
- machine-dependent file. */
-
-int
-call_ptrace (request, pid, addr, data)
- int request, pid;
- PTRACE_ARG3_TYPE addr;
- int data;
-{
- return ptrace (request, pid, addr, data);
-}
-
-#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_KILL, inferior_pid, (PTRACE_ARG3_TYPE) 0, 0);
- wait ((int *)0);
- target_mourn_inferior ();
-}
-
-#ifdef ATTACH_DETACH
-
-/* Start debugging the process whose number is PID. */
-int
-attach (pid)
- int pid;
-{
- errno = 0;
- ptrace (PT_ATTACH, pid, (PTRACE_ARG3_TYPE) 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);
- if (errno)
- perror_with_name ("ptrace");
- attach_flag = 0;
-}
-#endif /* ATTACH_DETACH */
-\f
-
-
-/* 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;
-}
-#endif /* KERNEL_U_ADDR_HPUX. */
#if !defined (offsetof)
#define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER)
char *msg = alloca (strlen (err) + 128);
sprintf (msg, "writing register %s: %s", reg_names[regno], err);
warning (msg);
- errors_found = 1;
}
regaddr += sizeof(int);
}
return;
}
-/* 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_STEP, inferior_pid, (PTRACE_ARG3_TYPE) 1, signal);
- else
- ptrace (PT_CONTINUE, inferior_pid, (PTRACE_ARG3_TYPE) 1, signal);
-
- 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.
-
- Returns the length copied, which is either the LEN argument or zero.
- This xfer function does not do partial moves, since child_ops
- doesn't allow memory operations to cross below us in the target stack
- anyway. */
-
-int
-child_xfer_memory (memaddr, myaddr, len, write, target)
- CORE_ADDR memaddr;
- char *myaddr;
- int len;
- int write;
- struct target_ops *target; /* ignored */
-{
- register int i;
- /* Round starting address down to longword boundary. */
- register CORE_ADDR addr = memaddr & - sizeof (int);
- /* Round ending address up; get number of longwords that makes. */
- register int count
- = (((memaddr + len) - addr) + sizeof (int) - 1) / sizeof (int);
- /* Allocate buffer of that many longwords. */
- register int *buffer = (int *) alloca (count * sizeof (int));
-
- if (write)
- {
- /* Fill start and end extra bytes of buffer with existing memory data. */
-
- if (addr != memaddr || len < (int)sizeof (int)) {
- /* Need part of initial word -- fetch it. */
- buffer[0] = ptrace (PT_READ_I, inferior_pid, (PTRACE_ARG3_TYPE) addr,
- 0);
- }
-
- if (count > 1) /* FIXME, avoid if even boundary */
- {
- buffer[count - 1]
- = ptrace (PT_READ_I, inferior_pid,
- (PTRACE_ARG3_TYPE) (addr + (count - 1) * sizeof (int)),
- 0);
- }
-
- /* Copy data to be written over corresponding part of buffer */
-
- bcopy (myaddr, (char *) buffer + (memaddr & (sizeof (int) - 1)), len);
-
- /* Write the entire buffer. */
-
- for (i = 0; i < count; i++, addr += sizeof (int))
- {
- errno = 0;
- ptrace (PT_WRITE_D, inferior_pid, (PTRACE_ARG3_TYPE) addr,
- buffer[i]);
- if (errno)
- {
- /* Using the appropriate one (I or D) is necessary for
- Gould NP1, at least. */
- errno = 0;
- ptrace (PT_WRITE_I, inferior_pid, (PTRACE_ARG3_TYPE) addr,
- buffer[i]);
- }
- if (errno)
- return 0;
- }
- }
- else
- {
- /* Read all the longwords */
- for (i = 0; i < count; i++, addr += sizeof (int))
- {
- errno = 0;
- buffer[i] = ptrace (PT_READ_I, 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);
- }
- return len;
-}
-
projects / deliverable / binutils-gdb.git / blobdiff