From 0ca198f1f90071a054287c204a3fd1b4ea315e18 Mon Sep 17 00:00:00 2001
From: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date: Mon, 11 Dec 2017 02:32:26 +0100
Subject: Record executable entry for PIE core dumps

* hurd/process.defs (proc_set_entry, proc_get_entry): New RPCs.
* hurd/process_reply.defs: Add skips for proc_set_entry, proc_get_entry.
* hurd/process_request.defs: Likewise.
* exec/exec.c (do_exec): Call proc_set_entry.
* proc/proc.h (proc): Add p_entry field.
* proc/mgt.c (S_proc_set_entry, S_proc_get_entry): New RPC
implementations.
* exec/elfcore.c (dump_core): Add at_entry note, call proc_get_entry to
get it, and write it with WRITE_NOTE.
---
 proc/mgt.c  | 18 ++++++++++++++++++
 proc/proc.h |  1 +
 2 files changed, 19 insertions(+)

(limited to 'proc')

diff --git a/proc/mgt.c b/proc/mgt.c
index 750073a0..354f3784 100644
--- a/proc/mgt.c
+++ b/proc/mgt.c
@@ -348,6 +348,24 @@ S_proc_get_arg_locations (struct proc *p,
   return 0;
 }
 
+/* Implement proc_set_entry as described in <hurd/process.defs>. */
+kern_return_t
+S_proc_set_entry (struct proc *p, vm_address_t entry)
+{
+  if (!p)
+    return EOPNOTSUPP;
+  p->p_entry = entry;
+  return 0;
+}
+
+/* Implement proc_get_entry as described in <hurd/process.defs>. */
+kern_return_t
+S_proc_get_entry (struct proc *p, vm_address_t *entry)
+{
+  *entry = p->p_entry;
+  return 0;
+}
+
 /* Implement proc_dostop as described in <hurd/process.defs>. */
 kern_return_t
 S_proc_dostop (struct proc *p,
diff --git a/proc/proc.h b/proc/proc.h
index 333e8840..b33845d9 100644
--- a/proc/proc.h
+++ b/proc/proc.h
@@ -71,6 +71,7 @@ struct proc
   vm_address_t p_argv, p_envp;
   vm_address_t start_code;	/* all executable segments are in this range */
   vm_address_t end_code;
+  vm_address_t p_entry;		/* executable entry */
   int p_status;			/* to return via wait */
   int p_sigcode;
   struct rusage p_rusage;	/* my usage if I'm dead, to return via wait */
-- 
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