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authorMark Kettenis <kettenis@gnu.org>2005-06-24 21:11:39 +0000
committerMark Kettenis <kettenis@gnu.org>2005-06-24 21:11:39 +0000
commit0ae4f2cb51381d17b66283a479974ea953c94d99 (patch)
tree921f9f2ad15a8d824814ea00a1f7803bd17a91cb /gdb
parent772562f8ace6d07d6af90d3dbf19da8ad1eaf75b (diff)
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* ppcobsd-nat.c: Include "gdbcore.h", <sys/signal.h>,
<machine/frame.h>, <machine/pcb.h> and "bsd-kvm.h". (ppcobsd_supply_pcb): New function. (_initialize_ppcobsd_nat): Enable libkvm interface. * Makefile.in (ppcobsd-nat.o): Update dependencies.
Diffstat (limited to 'gdb')
-rw-r--r--gdb/ChangeLog8
-rw-r--r--gdb/ppcobsd-nat.c45
2 files changed, 53 insertions, 0 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 1565a24..4a8158b 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,11 @@
+2005-06-24 Mark Kettenis <kettenis@gnu.org>
+
+ * ppcobsd-nat.c: Include "gdbcore.h", <sys/signal.h>,
+ <machine/frame.h>, <machine/pcb.h> and "bsd-kvm.h".
+ (ppcobsd_supply_pcb): New function.
+ (_initialize_ppcobsd_nat): Enable libkvm interface.
+ * Makefile.in (ppcobsd-nat.o): Update dependencies.
+
2005-06-24 Corinna Vinschen <vinschen@redhat.com>
* i386-tdep.c (struct i386_frame_cache): Define sp_offset as LONGEST.
diff --git a/gdb/ppcobsd-nat.c b/gdb/ppcobsd-nat.c
index 0a4aaf3..c0088c7 100644
--- a/gdb/ppcobsd-nat.c
+++ b/gdb/ppcobsd-nat.c
@@ -20,17 +20,22 @@
Boston, MA 02111-1307, USA. */
#include "defs.h"
+#include "gdbcore.h"
#include "inferior.h"
#include "regcache.h"
#include <stddef.h>
#include <sys/types.h>
#include <sys/ptrace.h>
+#include <sys/signal.h>
+#include <machine/frame.h>
+#include <machine/pcb.h>
#include <machine/reg.h>
#include "ppc-tdep.h"
#include "ppcobsd-tdep.h"
#include "inf-ptrace.h"
+#include "bsd-kvm.h"
/* OpenBSD/powerpc doesn't have PT_GETFPREGS/PT_SETFPREGS like
NetBSD/powerpc and FreeBSD/powerpc. */
@@ -72,6 +77,43 @@ ppcobsd_store_registers (int regnum)
}
+static int
+ppcobsd_supply_pcb (struct regcache *regcache, struct pcb *pcb)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (get_regcache_arch (regcache));
+ struct switchframe sf;
+ struct callframe cf;
+ int i, regnum;
+
+ /* The following is true for OpenBSD 3.7:
+
+ The pcb contains %r1 (the stack pointer) at the point of the
+ context switch in cpu_switch(). At that point we have a stack
+ frame as described by `struct switchframe', and below that a call
+ frame as described by `struct callframe'. From this information
+ we reconstruct the register state as it would look when we are in
+ cpu_switch(). */
+
+ /* The stack pointer shouldn't be zero. */
+ if (pcb->pcb_sp == 0)
+ return 0;
+
+ read_memory (pcb->pcb_sp, (gdb_byte *)&sf, sizeof sf);
+ regcache_raw_supply (regcache, SP_REGNUM, &sf.sp);
+ regcache_raw_supply (regcache, tdep->ppc_cr_regnum, &sf.cr);
+ regcache_raw_supply (regcache, tdep->ppc_gp0_regnum + 2, &sf.fixreg2);
+ for (i = 0, regnum = tdep->ppc_gp0_regnum + 13; i < 19; i++, regnum++)
+ regcache_raw_supply (regcache, regnum, &sf.fixreg[i]);
+
+ read_memory (sf.sp, (gdb_byte *)&cf, sizeof cf);
+ regcache_raw_supply (regcache, PC_REGNUM, &cf.lr);
+ regcache_raw_supply (regcache, tdep->ppc_gp0_regnum + 30, &cf.r30);
+ regcache_raw_supply (regcache, tdep->ppc_gp0_regnum + 31, &cf.r31);
+
+ return 1;
+}
+
+
/* Provide a prototype to silence -Wmissing-prototypes. */
void _initialize_ppcobsd_nat (void);
@@ -104,4 +146,7 @@ _initialize_ppcobsd_nat (void)
ppcobsd_reg_offsets.vr0_offset = offsetof (struct vreg, vreg);
ppcobsd_reg_offsets.vscr_offset = offsetof (struct vreg, vscr);
ppcobsd_reg_offsets.vrsave_offset = offsetof (struct vreg, vrsave);
+
+ /* Support debugging kernel virtual memory images. */
+ bsd_kvm_add_target (ppcobsd_supply_pcb);
}