-/* 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).
#include "target.h"
#include <sys/ptrace.h>
+extern CORE_ADDR text_end;
+
static void fetch_register ();
/* This function simply calls ptrace with the given arguments.
char buf[80];
extern char registers[];
register int i;
-
unsigned int offset = U_REGS_OFFSET;
+ int scratch;
if (regno >= 0)
{
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;
+ ptrace (PT_WUREGS, inferior_pid, (PTRACE_ARG3_TYPE) regaddr,
+ scratch, 0);
+ 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;
+ ptrace (PT_WUREGS, inferior_pid, (PTRACE_ARG3_TYPE) regaddr,
+ *(int *) ®isters[REGISTER_BYTE (regno) + i], 0);
+ 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);
+ goto error_exit;
+ }
+ regaddr += sizeof(int);
+ }
}
else
{
for (regno = 0; regno < NUM_REGS; regno++)
{
- 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);
- }
+ if (CANNOT_STORE_REGISTER (regno))
+ continue;
+ store_inferior_registers (regno);
}
}
+ error_exit:
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. */
-
-/* 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 ()
-{
-#if 0
- struct user u;
-#endif
- nlist ("/hp-ux", &nl);
- kernel_u_addr = nl[0].n_value;
-}
-
-#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
-
/* Fetch one register. */
static void
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.
+/* Resume execution of process PID.
If STEP is nonzero, single-step it.
If SIGNAL is nonzero, give it that signal. */
void
-child_resume (step, signal)
+child_resume (pid, step, signal)
+ int pid;
int step;
int signal;
{
written a new PC value to the child.) */
if (step)
- ptrace (PT_SINGLE, inferior_pid, (PTRACE_ARG3_TYPE) 1, signal, 0);
+ ptrace (PT_SINGLE, pid, (PTRACE_ARG3_TYPE) 1, signal, 0);
else
- ptrace (PT_CONTIN, inferior_pid, (PTRACE_ARG3_TYPE) 1, signal, 0);
+ ptrace (PT_CONTIN, 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] = ptrace (addr < text_end ? PT_RIUSER : PT_RDUSER,
+ inferior_pid, (PTRACE_ARG3_TYPE) addr, 0, 0);
}
if (count > 1) /* FIXME, avoid if even boundary */
{
buffer[count - 1]
- = ptrace (PT_RIUSER, inferior_pid,
+ = ptrace (addr < text_end ? PT_RIUSER : PT_RDUSER, inferior_pid,
(PTRACE_ARG3_TYPE) (addr + (count - 1) * sizeof (int)),
0, 0);
}
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,
+ ptrace (addr < text_end ? PT_WIUSER : 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);
- }
- 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] = ptrace (addr < text_end ? PT_RIUSER : PT_RDUSER,
+ inferior_pid, (PTRACE_ARG3_TYPE) addr, 0, 0);
if (errno)
return 0;
QUIT;
}
return len;
}
-
projects / deliverable / binutils-gdb.git / blobdiff