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* i386bsd-nat.c: Include <signal.h>, <stddef.h> and

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<sys/sysctl.h>.
(store_inferior_registers): Wrap long line.
(i386bsd_dr_get_status): Fix typo in comment.
(_initialize_i386bsd_nat): New function.  * i386bsd-tdep.c: New
file.  * config/i386/tm-fbsd.h (IN_SIGTRAMP): New define.
(i386bsd_in_sigtramp): New prototype.
(SIGTRAMP_START, SIGTRAMP_END): Redefine in terms...
(i386bsd_sigtramp_start, i386bsd_sigtramp_end): ...these new
(external) variables.
(SIGCONTEXT_PC_OFFSET): Removed.
(FRAME_SAVED_PC): New define.
(i386bsd_frame_saved_pc): New function.  * config/i386/fbsd.mt
(TDEPFILES): Add i386bsd-tdep.o.
This commit is contained in:
Mark Kettenis
2001-07-13 18:27:21 +00:00
parent d1bacddc24
commit b724791951
5 changed files with 168 additions and 12 deletions
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49
gdb/i386bsd-nat.c
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@@ -23,6 +23,8 @@
#include "regcache.h"
#include "gdb_assert.h"
#include <signal.h>
#include <stddef.h>
#include <sys/types.h>
#include <sys/ptrace.h>
#include <machine/reg.h>
@@ -198,7 +200,8 @@ store_inferior_registers (int regno)
fill_gregset (&gregs, regno);
if (ptrace (PT_SETREGS, PIDGET (inferior_ptid), (PTRACE_ARG3_TYPE) &gregs, 0) == -1)
if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) &gregs, 0) == -1)
perror_with_name ("Couldn't write registers");
if (regno == -1 || regno >= FP0_REGNUM)
@@ -279,7 +282,7 @@ i386bsd_dr_get_status (void)
/* 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
stuff to the target vector. For now, just return zero if the
ptrace call fails. */
if (ptrace (PT_GETDBREGS, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) & dbregs, 0) == -1)
@@ -316,3 +319,45 @@ kernel_u_size (void)
{
return (sizeof (struct user));
}
/* See i386bsd-tdep.c. */
extern int i386bsd_sigcontext_pc_offset;
#include <sys/sysctl.h>
void
_initialize_i386bsd_nat (void)
{
/* To support the recognition of signal handlers, i386bsd-tdep.c
hardcodes some constants. Inclusion of this file means that we
are compiling a native debugger, which means that we can use the
system header files and sysctl(3) to get at the relevant
information. */
/* Override the default value for the offset of the program counter
in the sigcontext structure. */
i386bsd_sigcontext_pc_offset = offsetof (struct sigcontext, sc_pc);
/* FreeBSD provides a kern.ps_strings sysctl that we can use to
locate the sigtramp. That way we can still recognize a sigtramp
if it's location is changed in a new kernel. Of course this is
still based on the assumption that the sigtramp is placed
directly under the location where the program arguments and
environment can be found. */
#ifdef KERN_PS_STRINGS
{
int mib[2];
int ps_strings;
size_t len;
mib[0] = CTL_KERN;
mib[1] = KERN_PS_STRINGS;
len = sizeof (ps_strings);
if (sysctl (mib, 2, &ps_strings, &len, NULL, 0) == 0)
{
i386bsd_sigtramp_start = ps_strings - 128;
i386bsd_sigtramp_end = ps_strings;
}
}
#endif
}