X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=gdb%2Fi386fbsd-nat.c;h=bb516fedfea3688adeabbb42addcca706f0ce629;hb=44cd25cf2da5e83fed367a7f49614e3024dee38b;hp=efc61b6cbbb8e4b360ee0541e1292fd243464e45;hpb=5d93ae8cf3aa4d3b8600ca2496c4385889996fb1;p=deliverable%2Fbinutils-gdb.git

diff --git a/gdb/i386fbsd-nat.c b/gdb/i386fbsd-nat.c
index efc61b6cbb..bb516fedfe 100644
--- a/gdb/i386fbsd-nat.c
+++ b/gdb/i386fbsd-nat.c
@@ -22,22 +22,21 @@
 #include "defs.h"
 #include "inferior.h"
 #include "regcache.h"
+#include "target.h"
 
 #include <sys/types.h>
 #include <sys/ptrace.h>
 #include <sys/sysctl.h>
 
+#include "fbsd-nat.h"
 #include "i386-tdep.h"
+#include "i386bsd-nat.h"
 
-/* Prevent warning from -Wmissing-prototypes.  */
-void _initialize_i386fbsd_nat (void);
-
-/* Resume execution of the inferior process.
-   If STEP is nonzero, single-step it.
-   If SIGNAL is nonzero, give it that signal.  */
+/* Resume execution of the inferior process.  If STEP is nonzero,
+   single-step it.  If SIGNAL is nonzero, give it that signal.  */
 
-void
-child_resume (ptid_t ptid, int step, enum target_signal signal)
+static void
+i386fbsd_resume (ptid_t ptid, int step, enum target_signal signal)
 {
   pid_t pid = ptid_get_pid (ptid);
   int request = PT_STEP;
@@ -76,12 +75,65 @@ child_resume (ptid_t ptid, int step, enum target_signal signal)
      written a new PC value to the child.)  */
   if (ptrace (request, pid, (caddr_t) 1,
 	      target_signal_to_host (signal)) == -1)
-    perror_with_name ("ptrace");
+    perror_with_name (("ptrace"));
 }
 
+
+/* Support for debugging kernel virtual memory images.  */
+
+#include <sys/types.h>
+#include <machine/pcb.h>
+
+#include "bsd-kvm.h"
+
+static int
+i386fbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb)
+{
+  /* The following is true for FreeBSD 4.7:
+
+     The pcb contains %eip, %ebx, %esp, %ebp, %esi, %edi and %gs.
+     This accounts for all callee-saved registers specified by the
+     psABI and then some.  Here %esp contains the stack pointer at the
+     point just after the call to cpu_switch().  From this information
+     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;
+
+  pcb->pcb_esp += 4;
+  regcache_raw_supply (regcache, I386_EDI_REGNUM, &pcb->pcb_edi);
+  regcache_raw_supply (regcache, I386_ESI_REGNUM, &pcb->pcb_esi);
+  regcache_raw_supply (regcache, I386_EBP_REGNUM, &pcb->pcb_ebp);
+  regcache_raw_supply (regcache, I386_ESP_REGNUM, &pcb->pcb_esp);
+  regcache_raw_supply (regcache, I386_EBX_REGNUM, &pcb->pcb_ebx);
+  regcache_raw_supply (regcache, I386_EIP_REGNUM, &pcb->pcb_eip);
+  regcache_raw_supply (regcache, I386_GS_REGNUM, &pcb->pcb_gs);
+
+  return 1;
+}
+
+
+/* Prevent warning from -Wmissing-prototypes.  */
+void _initialize_i386fbsd_nat (void);
+
 void
 _initialize_i386fbsd_nat (void)
 {
+  struct target_ops *t;
+
+  /* Add some extra features to the common *BSD/i386 target.  */
+  t = i386bsd_target ();
+  t->to_resume = i386fbsd_resume;
+  t->to_pid_to_exec_file = fbsd_pid_to_exec_file;
+  t->to_find_memory_regions = fbsd_find_memory_regions;
+  t->to_make_corefile_notes = fbsd_make_corefile_notes;
+  add_target (t);
+
+  /* Support debugging kernel virtual memory images.  */
+  bsd_kvm_add_target (i386fbsd_supply_pcb);
+
   /* FreeBSD provides a kern.ps_strings 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.  Of course this is
@@ -91,7 +143,7 @@ _initialize_i386fbsd_nat (void)
 #ifdef KERN_PS_STRINGS
   {
     int mib[2];
-    int ps_strings;
+    u_long ps_strings;
     size_t len;
 
     mib[0] = CTL_KERN;