Really delete inf_ptrace_xfer_memory!
This commit is contained in:
Andrew Cagney
parent
7479dfd4de
commit
56157dbefc
1 changed files with 0 additions and 139 deletions
139
gdb/inf-ptrace.c
139
gdb/inf-ptrace.c
|
|
@ -95,145 +95,6 @@ inf_ptrace_resume (ptid_t ptid, int step, enum target_signal signal)
|
||||||
perror_with_name ("ptrace");
|
perror_with_name ("ptrace");
|
||||||
}
|
}
|
||||||
|
|
||||||
/* Set an upper limit on alloca. */
|
|
||||||
#define GDB_MAX_ALLOCA 0x1000
|
|
||||||
|
|
||||||
/* 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. TARGET is ignored.
|
|
||||||
|
|
||||||
Returns the length copied, which is either the LEN argument or
|
|
||||||
zero. This xfer function does not do partial moves, since
|
|
||||||
ptrace_ops_hack doesn't allow memory operations to cross below us in the
|
|
||||||
target stack anyway. */
|
|
||||||
|
|
||||||
int
|
|
||||||
inf_ptrace_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write,
|
|
||||||
struct mem_attrib *attrib, struct target_ops *target)
|
|
||||||
{
|
|
||||||
int i;
|
|
||||||
/* Round starting address down to longword boundary. */
|
|
||||||
CORE_ADDR addr = memaddr & -(CORE_ADDR) sizeof (PTRACE_TYPE_RET);
|
|
||||||
/* Round ending address up; get number of longwords that makes. */
|
|
||||||
int count = ((((memaddr + len) - addr) + sizeof (PTRACE_TYPE_RET) - 1)
|
|
||||||
/ sizeof (PTRACE_TYPE_RET));
|
|
||||||
int alloc = count * sizeof (PTRACE_TYPE_RET);
|
|
||||||
PTRACE_TYPE_RET *buffer;
|
|
||||||
struct cleanup *old_chain = NULL;
|
|
||||||
|
|
||||||
#ifdef PT_IO
|
|
||||||
/* OpenBSD 3.1, NetBSD 1.6 and FreeBSD 5.0 have a new PT_IO request
|
|
||||||
that promises to be much more efficient in reading and writing
|
|
||||||
data in the traced process's address space. */
|
|
||||||
|
|
||||||
{
|
|
||||||
struct ptrace_io_desc piod;
|
|
||||||
|
|
||||||
/* NOTE: We assume that there are no distinct address spaces for
|
|
||||||
instruction and data. */
|
|
||||||
piod.piod_op = write ? PIOD_WRITE_D : PIOD_READ_D;
|
|
||||||
piod.piod_offs = (void *) memaddr;
|
|
||||||
piod.piod_addr = myaddr;
|
|
||||||
piod.piod_len = len;
|
|
||||||
|
|
||||||
if (ptrace (PT_IO, PIDGET (inferior_ptid), (caddr_t) &piod, 0) == -1)
|
|
||||||
{
|
|
||||||
/* If the PT_IO request is somehow not supported, fallback on
|
|
||||||
using PT_WRITE_D/PT_READ_D. Otherwise we will return zero
|
|
||||||
to indicate failure. */
|
|
||||||
if (errno != EINVAL)
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
else
|
|
||||||
{
|
|
||||||
/* Return the actual number of bytes read or written. */
|
|
||||||
return piod.piod_len;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
#endif
|
|
||||||
|
|
||||||
/* Allocate buffer of that many longwords. */
|
|
||||||
if (len < GDB_MAX_ALLOCA)
|
|
||||||
{
|
|
||||||
buffer = (PTRACE_TYPE_RET *) alloca (alloc);
|
|
||||||
}
|
|
||||||
else
|
|
||||||
{
|
|
||||||
buffer = (PTRACE_TYPE_RET *) xmalloc (alloc);
|
|
||||||
old_chain = make_cleanup (xfree, buffer);
|
|
||||||
}
|
|
||||||
|
|
||||||
if (write)
|
|
||||||
{
|
|
||||||
/* Fill start and end extra bytes of buffer with existing memory
|
|
||||||
data. */
|
|
||||||
if (addr != memaddr || len < (int) sizeof (PTRACE_TYPE_RET))
|
|
||||||
{
|
|
||||||
/* Need part of initial word -- fetch it. */
|
|
||||||
buffer[0] = ptrace (PT_READ_I, PIDGET (inferior_ptid),
|
|
||||||
(PTRACE_TYPE_ARG3) addr, 0);
|
|
||||||
}
|
|
||||||
|
|
||||||
if (count > 1) /* FIXME, avoid if even boundary. */
|
|
||||||
{
|
|
||||||
buffer[count - 1] =
|
|
||||||
ptrace (PT_READ_I, PIDGET (inferior_ptid),
|
|
||||||
((PTRACE_TYPE_ARG3)
|
|
||||||
(addr + (count - 1) * sizeof (PTRACE_TYPE_RET))), 0);
|
|
||||||
}
|
|
||||||
|
|
||||||
/* Copy data to be written over corresponding part of buffer. */
|
|
||||||
memcpy ((char *) buffer + (memaddr & (sizeof (PTRACE_TYPE_RET) - 1)),
|
|
||||||
myaddr, len);
|
|
||||||
|
|
||||||
/* Write the entire buffer. */
|
|
||||||
for (i = 0; i < count; i++, addr += sizeof (PTRACE_TYPE_RET))
|
|
||||||
{
|
|
||||||
errno = 0;
|
|
||||||
ptrace (PT_WRITE_D, PIDGET (inferior_ptid),
|
|
||||||
(PTRACE_TYPE_ARG3) 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, PIDGET (inferior_ptid),
|
|
||||||
(PTRACE_TYPE_ARG3) addr, buffer[i]);
|
|
||||||
}
|
|
||||||
if (errno)
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
else
|
|
||||||
{
|
|
||||||
/* Read all the longwords. */
|
|
||||||
for (i = 0; i < count; i++, addr += sizeof (PTRACE_TYPE_RET))
|
|
||||||
{
|
|
||||||
errno = 0;
|
|
||||||
buffer[i] = ptrace (PT_READ_I, PIDGET (inferior_ptid),
|
|
||||||
(PTRACE_TYPE_ARG3) addr, 0);
|
|
||||||
if (errno)
|
|
||||||
return 0;
|
|
||||||
QUIT;
|
|
||||||
}
|
|
||||||
|
|
||||||
/* Copy appropriate bytes out of the buffer. */
|
|
||||||
memcpy (myaddr,
|
|
||||||
(char *) buffer + (memaddr & (sizeof (PTRACE_TYPE_RET) - 1)),
|
|
||||||
len);
|
|
||||||
}
|
|
||||||
|
|
||||||
if (old_chain != NULL)
|
|
||||||
do_cleanups (old_chain);
|
|
||||||
return len;
|
|
||||||
}
|
|
||||||
|
|
||||||
/* Wait for child to do something. Return pid of child, or -1 in case
|
/* Wait for child to do something. Return pid of child, or -1 in case
|
||||||
of error; store status through argument pointer OURSTATUS. */
|
of error; store status through argument pointer OURSTATUS. */
|
||||||
|
|
||||||
|
|
|
||||||
Loading…
Reference in a new issue