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* infptrace.c (child_xfer_memory): Make use of the new PT_IO

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request that's available in *BSD.
This commit is contained in:
Mark Kettenis 2002-11-08 23:48:38 +00:00
parent 94ba925ab9
commit 371a6e84e5
2 changed files with 34 additions and 0 deletions
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3
gdb/ChangeLog
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@ -1,5 +1,8 @@
2002-11-09 Mark Kettenis <kettenis@gnu.org> 2002-11-09 Mark Kettenis <kettenis@gnu.org>
* infptrace.c (child_xfer_memory): Make use of the new PT_IO
request that's available in *BSD.
* i386-tdep.h (IS_FPU_CTRL_REGNUM): Remove. * i386-tdep.h (IS_FPU_CTRL_REGNUM): Remove.
* i387-tdep.c (i387_fill_fxsave): Use FOOFF_REGNUM instead of * i387-tdep.c (i387_fill_fxsave): Use FOOFF_REGNUM instead of

31
gdb/infptrace.c
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@ -514,6 +514,37 @@ child_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write,
PTRACE_XFER_TYPE *buffer; PTRACE_XFER_TYPE *buffer;
struct cleanup *old_chain = NULL; 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. */ /* Allocate buffer of that many longwords. */
if (len < GDB_MAX_ALLOCA) if (len < GDB_MAX_ALLOCA)
{ {