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* i386obsd-nat.c: Include "gdbcore.h", "regcache.h", "target.h",

Browse source 
<machine/frame.h>, <machine/pcb.h>, "i386bsd-nat.h" and
"bsd-kvm.h".
(i386obsd_supply_pcb): New function.
(_initialize_i386obsd_nat): Construct and add target
vector. Enable libkvm interface.
* Makefile.in (i386obsd-nat.o): Update dependencies.
* config/i386/obsd.mh (NATDEPFILES): Remove i386nbsd-nat.c
This commit is contained in:
Mark Kettenis 2006-12-16 10:45:52 +00:00
parent 37e28b926c
commit 5d0fc17b31
4 changed files with 78 additions and 3 deletions
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9
gdb/ChangeLog
View file

@ -1,5 +1,14 @@
2006-12-16 Mark Kettenis <kettenis@gnu.org>
* i386obsd-nat.c: Include "gdbcore.h", "regcache.h", "target.h",
<machine/frame.h>, <machine/pcb.h>, "i386bsd-nat.h" and
"bsd-kvm.h".
(i386obsd_supply_pcb): New function.
(_initialize_i386obsd_nat): Construct and add target
vector. Enable libkvm interface.
* Makefile.in (i386obsd-nat.o): Update dependencies.
* config/i386/obsd.mh (NATDEPFILES): Remove i386nbsd-nat.c
* sparcobsd-tdep.c: Fix typo.
Add OpenBSD/sh native support.

3
gdb/Makefile.in
View file

@ -2132,7 +2132,8 @@ i386nbsd-tdep.o: i386nbsd-tdep.c $(defs_h) $(arch_utils_h) $(frame_h) \
i386-nto-tdep.o: i386-nto-tdep.c $(defs_h) $(frame_h) $(osabi_h) \
$(regcache_h) $(target_h) $(gdb_assert_h) $(gdb_string_h) \
$(i386_tdep_h) $(i387_tdep_h) $(nto_tdep_h) $(solib_svr4_h)
i386obsd-nat.o: i386obsd-nat.c $(defs_h) $(i386_tdep_h)
i386obsd-nat.o: i386obsd-nat.c $(defs_h) $(gdbcore_h) $(regcache_h) \
$(target_h) $(i386_tdep_h) $(i386bsd_nat_h) $(bsd_kvm_h)
i386obsd-tdep.o: i386obsd-tdep.c $(defs_h) $(arch_utils_h) $(frame_h) \
$(frame_unwind_h) $(gdbcore_h) $(regcache_h) $(regset_h) $(symtab_h) \
$(objfiles_h) $(osabi_h) $(target_h) $(trad_frame_h) $(gdb_assert_h) \

2
gdb/config/i386/obsd.mh
View file

@ -1,5 +1,5 @@
# Host: OpenBSD/i386 ELF
NATDEPFILES= fork-child.o inf-ptrace.o \
i386bsd-nat.o i386obsd-nat.o i386nbsd-nat.o bsd-kvm.o
i386bsd-nat.o i386obsd-nat.o bsd-kvm.o
LOADLIBES= -lkvm

67
gdb/i386obsd-nat.c
View file

@ -1,6 +1,6 @@
/* Native-dependent code for OpenBSD/i386.
Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
Copyright (C) 2002, 2003, 2004, 2006 Free Software Foundation, Inc.
This file is part of GDB.
@ -20,11 +20,70 @@
Boston, MA 02110-1301, USA. */
#include "defs.h"
#include "gdbcore.h"
#include "regcache.h"
#include "target.h"
#include <sys/param.h>
#include <sys/sysctl.h>
#include <machine/frame.h>
#include <machine/pcb.h>
#include "i386-tdep.h"
#include "i386bsd-nat.h"
#include "bsd-kvm.h"
static int
i386obsd_supply_pcb (struct regcache *regcache, struct pcb *pcb)
{
struct switchframe sf;
/* The following is true for OpenBSD 3.6:
The pcb contains %esp and %ebp at the point of the context switch
in cpu_switch(). At that point we have a stack frame as
described by `struct switchframe', which for OpenBSD 3.6 has the
following layout:
interrupt level
%edi
%esi
%ebx
%eip
we reconstruct the register state as it would look when we just
returned from cpu_switch(). */
/* The stack pointer shouldn't be zero. */
if (pcb->pcb_esp == 0)
return 0;
/* Read the stack frame, and check its validity. We do this by
checking if the saved interrupt priority level in the stack frame
looks reasonable.. */
read_memory (pcb->pcb_esp, (char *) &sf, sizeof sf);
if ((unsigned int) sf.sf_ppl < 0x100 && (sf.sf_ppl & 0xf) == 0)
{
/* Yes, we have a frame that matches cpu_switch(). */
pcb->pcb_esp += sizeof (struct switchframe);
regcache_raw_supply (regcache, I386_EDI_REGNUM, &sf.sf_edi);
regcache_raw_supply (regcache, I386_ESI_REGNUM, &sf.sf_esi);
regcache_raw_supply (regcache, I386_EBX_REGNUM, &sf.sf_ebx);
regcache_raw_supply (regcache, I386_EIP_REGNUM, &sf.sf_eip);
}
else
{
/* No, the pcb must have been last updated by savectx(). */
pcb->pcb_esp += 4;
regcache_raw_supply (regcache, I386_EIP_REGNUM, &sf);
}
regcache_raw_supply (regcache, I386_EBP_REGNUM, &pcb->pcb_ebp);
regcache_raw_supply (regcache, I386_ESP_REGNUM, &pcb->pcb_esp);
return 1;
}
/* Prevent warning from -Wmissing-prototypes. */
void _initialize_i386obsd_nat (void);
@ -32,6 +91,12 @@ void _initialize_i386obsd_nat (void);
void
_initialize_i386obsd_nat (void)
{
/* We've got nothing to add to the common *BSD/i386 target. */
add_target (i386bsd_target ());
/* Support debugging kernel virtual memory images. */
bsd_kvm_add_target (i386obsd_supply_pcb);
/* OpenBSD provides a vm.psstrings sysctl that we can use to locate
the sigtramp. That way we can still recognize a sigtramp if its
location is changed in a new kernel. This is especially