Support 'info proc' for FreeBSD process core dumps.

- Command line arguments are obtained from the pr_psargs[] array
  saved in the NT_PRPSINFO note.
- The 'cwd' and 'exe' values are obtained from the per-process file
  descriptor table stored in the NT_PROCSTAT_FILES core note.
- 'mappings' is implemented by walking the array of VM map entries
  stored in the NT_PROCSTAT_VMMAP core note.
- 'status' output is generated by outputting fields from
  the first structure stored in the NT_PROCSTAT_PROC core note.
- 'stat' is aliased to 'status'.

gdb/ChangeLog:

	* fbsd-tdep.c (KVE_STRUCTSIZE, KVE_START, KVE_END, KVE_OFFSET)
	(KVE_FLAGS, KVE_PROTECTION, KVE_PATH, KINFO_VME_PROT_READ)
	(KINFO_VME_PROT_WRITE, KINFO_VME_PROT_EXEC, KINFO_VME_FLAG_COW)
	(KINFO_VME_FLAG_NEEDS_COPY, KINFO_VME_FLAG_NOCOREDUMP)
	(KINFO_VME_FLAG_SUPER, KINFO_VME_FLAG_GROWS_UP)
	(KINFO_VME_FLAG_GROWS_DOWN, KF_STRUCTSIZE, KF_TYPE, KF_FD)
	(KF_PATH, KINFO_FILE_TYPE_VNODE, KINFO_FILE_FD_TYPE_CWD)
	(KINFO_FILE_FD_TYPE_TEXT, SIG_WORDS, struct kinfo_proc_layout)
	(kinfo_proc_layout_32, kinfo_proc_layout_i386)
	(kinfo_proc_layout_64, fbsd_vm_map_entry_flags)
	(fbsd_core_info_proc_mappings, fbsd_core_vnode_path)
	(fbsd_core_fetch_timeval, fbsd_print_sigset)
	(fbsd_core_info_proc_status, fbsd_core_info_proc): New.
	(fbsd_init_abi):  Install gdbarch "core_info_proc" method.
	* fbsd-tdep.h (fbsd_vm_map_entry_flags): New.

1 files changed, 7 insertions, 0 deletions

diff --git a/gdb/fbsd-tdep.h b/gdb/fbsd-tdep.h
index 9769903..0b293e5 100644
--- a/gdb/fbsd-tdep.h
+++ b/gdb/fbsd-tdep.h
@@ -22,4 +22,11 @@
 
 extern void fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch);
 
+/* Helper function to generate mappings flags for a single VM map
+   entry in 'info proc mappings'.  The KVE_FLAGS and KVE_PROTECTION
+   parameters should contain the values of the corresponding fields in
+   a 'struct kinfo_vmentry'.  */
+
+extern const char *fbsd_vm_map_entry_flags (int kve_flags, int kve_protection);
+
 #endif /* fbsd-tdep.h */