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Date: Tue, 14 Dec 2010 15:56:14 +0530
From: "Suzuki K. Poulose" <suzuki@...ibm.com>
To: linux-kernel@...r.kernel.org
Cc: "Suzuki K. Poulose" <suzuki@...ibm.com>,
Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>,
Christoph Hellwig <hch@....de>,
Masami Hiramatsu <mhiramat@...hat.com>,
Ananth N Mavinakayanahalli <ananth@...ibm.com>,
Daisuke HATAYAMA <d.hatayama@...fujitsu.com>,
Andi Kleen <andi@...stfloor.org>,
Roland McGrath <roland@...hat.com>,
Amerigo Wang <amwang@...hat.com>,
Linus Torvalds <torvalds@...ux-foundation.org>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
Oleg Nesterov <oleg@...hat.com>,
Andrew Morton <akpm@...ux-foundation.org>
Subject: [Patch 20/21] Add supporting for compat ELF class data structures
Redefine the structures to include the compat class variant of the data
structures.
gencore-elf.c will be reused for the compat ELF class support. Hence, define
macros to get the right member for each class.
Signed-off-by: Suzuki K. Poulose <suzuki@...ibm.com>
---
fs/proc/gencore-elf.c | 37 +++++++++++++++++++++++++------------
fs/proc/gencore.h | 18 ++++++++++++++++--
2 files changed, 41 insertions(+), 14 deletions(-)
Index: linux-2.6.36-rc7/fs/proc/gencore-elf.c
===================================================================
--- linux-2.6.36-rc7.orig/fs/proc/gencore-elf.c
+++ linux-2.6.36-rc7/fs/proc/gencore-elf.c
@@ -16,6 +16,8 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* Copyright (C) IBM Corporation, 2010
+ *
+ * This code is reused in gencore-compat-elf.c for compat ELF class support.
*/
#include <linux/mm.h>
#include <linux/slab.h>
@@ -30,6 +32,17 @@
#include "gencore.h"
+#ifndef et_prstatus
+/* prstatus field for native elf, in elf_thread_core_info*/
+#define et_prstatus u.prstatus
+#endif
+
+#ifndef cp_prpsinfo
+/* prpsinfo field for native elf, in core_proc */
+#define cp_prpsinfo u.prpsinfo
+#endif
+
+
static int notesize(struct memelfnote *men)
{
int size = sizeof(struct elf_note);
@@ -73,14 +86,14 @@ static int fill_thread_core_info(struct
unsigned int i;
const struct user_regset_view *view = task_user_regset_view(tinfo->task);
- fill_prstatus(&tinfo->prstatus, tinfo->task, 0);
+ fill_prstatus(&tinfo->et_prstatus, tinfo->task, 0);
do_thread_regset_writeback(tinfo->task, &view->regsets[0]);
(void) view->regsets[0].get(tinfo->task, &view->regsets[0],
- 0, sizeof(tinfo->prstatus.pr_reg),
- &tinfo->prstatus.pr_reg, NULL);
+ 0, sizeof(tinfo->et_prstatus.pr_reg),
+ &tinfo->et_prstatus.pr_reg, NULL);
fill_note(&tinfo->notes[0], "CORE", NT_PRSTATUS,
- sizeof(tinfo->prstatus), &tinfo->prstatus);
+ sizeof(tinfo->et_prstatus), &tinfo->et_prstatus);
cp->notes_size += notesize(&tinfo->notes[0]);
tinfo->num_notes = view->n;
@@ -105,7 +118,7 @@ static int fill_thread_core_info(struct
regset->core_note_type,
size, data);
else {
- tinfo->prstatus.pr_fpvalid = 1;
+ tinfo->et_prstatus.pr_fpvalid = 1;
fill_note(&tinfo->notes[i], "CORE",
NT_PRFPREG, size, data);
}
@@ -124,15 +137,15 @@ static int fill_thread_core_info(struct
elf_fpxregset_t xfpu, *pxfpu;
#endif
- fill_prstatus(&tinfo->prstatus, t->task, 0);
- elf_core_copy_task_regs(t->task, &tinfo->prstatus.pr_reg);
+ fill_prstatus(&tinfo->et_prstatus, t->task, 0);
+ elf_core_copy_task_regs(t->task, &tinfo->et_prstatus.pr_reg);
fill_note(&tinfo->notes[0], "CORE", NT_PRSTATUS,
- sizeof(t->prstatus), &t->prstatus);
+ sizeof(t->et_prstatus), &t->et_prstatus);
cp->notes_size += notesize(&tinfo->notes[0]);
tinfo->num_notes = 1;
- if (tinfo->prstatus.pr_fpvalid = elf_core_copy_task_fpregs(tinfo->task,
+ if (tinfo->et_prstatus.pr_fpvalid = elf_core_copy_task_fpregs(tinfo->task,
NULL, &fpu)) {
pfpu = kzalloc(sizeof(*pfpu), GFP_KERNEL);
if (pfpu == NULL)
@@ -168,7 +181,7 @@ static void zero_thread_state(struct elf
{
int i;
- memset(&tinfo->prstatus.pr_reg, 0, sizeof(tinfo->prstatus.pr_reg));
+ memset(&tinfo->et_prstatus.pr_reg, 0, sizeof(tinfo->et_prstatus.pr_reg));
for (i = 1; i < tinfo->num_notes; i++)
if (tinfo->notes[i].data)
memset(tinfo->notes[i].data, 0, tinfo->notes[i].datasz);
@@ -180,9 +193,9 @@ static int collect_notes(struct core_pro
struct elf_thread_core_info *tinfo;
/* Fill the 2 process wide notes */
- fill_psinfo(&cp->prpsinfo, cp->task, cp->task->mm);
+ fill_psinfo(&cp->cp_prpsinfo, cp->task, cp->task->mm);
fill_note(&cp->psinfo, "CORE", NT_PRPSINFO,
- sizeof(struct elf_prpsinfo), &cp->prpsinfo);
+ sizeof(struct elf_prpsinfo), &cp->cp_prpsinfo);
cp->notes_size += notesize(&cp->psinfo);
fill_auxv_note(&cp->auxv, cp->task->mm);
Index: linux-2.6.36-rc7/fs/proc/gencore.h
===================================================================
--- linux-2.6.36-rc7.orig/fs/proc/gencore.h
+++ linux-2.6.36-rc7/fs/proc/gencore.h
@@ -6,6 +6,10 @@
#include <linux/elfcore.h>
#include <linux/elfcore-internal.h>
+#ifdef CONFIG_COMPAT_BINFMT_ELF
+#include <linux/elfcore-compat.h>
+#endif
+
enum { ELF_CLASS_NATIVE, ELF_CLASS_COMPAT };
struct elf_thread_core_info {
@@ -13,7 +17,12 @@ struct elf_thread_core_info {
unsigned short num_notes; /* Number of notes for this thread */
struct elf_thread_core_info *next;
struct task_struct *task;
- struct elf_prstatus prstatus;
+ union {
+ struct elf_prstatus prstatus;
+#ifdef CONFIG_COMPAT_BINFMT_ELF
+ struct compat_elf_prstatus compat_prstatus;
+#endif
+ } u;
struct memelfnote notes[0];
};
@@ -25,7 +34,12 @@ struct core_proc {
struct elf_thread_core_info *tinfo;
struct memelfnote psinfo;
struct memelfnote auxv;
- struct elf_prpsinfo prpsinfo;
+ union {
+ struct elf_prpsinfo prpsinfo;
+#ifdef CONFIG_COMPAT_BINFMT_ELF
+ struct compat_elf_prpsinfo compat_prpsinfo;
+#endif
+ } u;
size_t elf_buflen; /* size of elf_buf */
size_t nphdrs; /* number of phdrs */
size_t notes_size;
--
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