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* i386bsd-nat.c: Include "gdb_assert.h".

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[HAVE_PT_GETDBREGS] (DBREG_DRX): Define if not
already defined.
[HAVE_PT_GETDBREGS] (i386bsd_dr_set, i386bsd_dr_set_control,
i386bsd_dr_set_addr, i386bsd_dr_reset_addr,
i386bsd_dr_get_status): New functions.
* config/i386/nm-fbsd.h [HAVE_PT_GETDBREGS]
(I386_USE_GENERIC_WATCHPOINTS): Define.
Include "i386/nm-i386.h".
(I386_DR_LOW_SET_CONTROL, I386_DR_LOW_SET_ADDR,
I386_DR_LOW_RESET_ADDR, I386_DR_LOW_GET_STATUS): New macros.
(i386bsd_dr_set_control, i386bsd_dr_set_addr,
i386bsd_dr_reset_addr, i386bsd_dr_get_status): New prototypes.
* acconfig.h (HAVE_PT_GETDBREGS): New configure macro.
* configure.in: Cleanup a few comments.  Check for PT_GETDBREGS
ptrace request.
* config.in, configure: Regenerate.
This commit is contained in:
Mark Kettenis
2001-03-31 18:09:03 +00:00
parent 4bcc394469
commit 0afdd43759
7 changed files with 549 additions and 384 deletions
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75
gdb/i386bsd-nat.c
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@@ -22,6 +22,7 @@
#include "inferior.h"
#include "regcache.h"
#include "gdb_assert.h"
#include <sys/types.h>
#include <sys/ptrace.h>
#include <machine/reg.h>
@@ -215,6 +216,80 @@ store_inferior_registers (int regno)
}
/* Support for debug registers. */
#ifdef HAVE_PT_GETDBREGS
/* Not all versions of FreeBSD/i386 that support the debug registers
have this macro. */
#ifndef DBREG_DRX
#define DBREG_DRX(d, x) ((&d->dr0)[x])
#endif
static void
i386bsd_dr_set (int regnum, unsigned int value)
{
struct dbreg dbregs;
if (ptrace (PT_GETDBREGS, inferior_pid, (PTRACE_ARG3_TYPE) &dbregs, 0) == -1)
perror_with_name ("Couldn't get debug registers");
/* For some mysterious reason, some of the reserved bits in the
debug control register get set. Mask these off, otherwise the
ptrace call below will fail. */
dbregs.dr7 &= ~(0x0000fc00);
DBREG_DRX ((&dbregs), regnum) = value;
if (ptrace (PT_SETDBREGS, inferior_pid, (PTRACE_ARG3_TYPE) &dbregs, 0) == -1)
perror_with_name ("Couldn't write debug registers");
}
void
i386bsd_dr_set_control (unsigned long control)
{
i386bsd_dr_set (7, control);
}
void
i386bsd_dr_set_addr (int regnum, CORE_ADDR addr)
{
gdb_assert (regnum >= 0 && regnum <= 4);
i386bsd_dr_set (regnum, addr);
}
void
i386bsd_dr_reset_addr (int regnum)
{
gdb_assert (regnum >= 0 && regnum <= 4);
i386bsd_dr_set (regnum, 0);
}
unsigned long
i386bsd_dr_get_status (void)
{
struct dbreg dbregs;
/* FIXME: kettenis/2001-03-31: Calling perror_with_name if the
ptrace call fails breaks debugging remote targets. The correct
way to fix this is to add the hardware breakpoint and watchpoint
stuff to the target vectore. For now, just return zero if the
ptrace call fails. */
if (ptrace (PT_GETDBREGS, inferior_pid, (PTRACE_ARG3_TYPE) &dbregs, 0) == -1)
#if 0
perror_with_name ("Couldn't read debug registers");
#else
return 0;
#endif
return dbregs.dr6;
}
#endif /* PT_GETDBREGS */
/* Support for the user struct. */
/* Return the address register REGNO. BLOCKEND is the value of