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kernel: Make sure brk area is found

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Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
This commit is contained in:
Cyrill Gorcunov 2011-10-12 13:33:20 +04:00
parent 94789dcfc9
commit b2c4ebf207
1 changed files with 16 additions and 5 deletions
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21
kernel/binfmt-elf-for-cr-5
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@ -27,16 +27,16 @@ Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
arch/x86/include/asm/elf.h | 3
arch/x86/include/asm/elf_ckpt.h | 80 ++++++++
arch/x86/kernel/Makefile | 2
arch/x86/kernel/elf_ckpt.c | 161 +++++++++++++++++
arch/x86/kernel/elf_ckpt.c | 161 ++++++++++++++++
arch/x86/vdso/vma.c | 22 ++
fs/Kconfig.binfmt | 11 +
fs/Makefile | 1
fs/binfmt_elf.c | 17 +
fs/binfmt_elf_ckpt.c | 378 ++++++++++++++++++++++++++++++++++++++++
fs/binfmt_elf_ckpt.c | 389 ++++++++++++++++++++++++++++++++++++++++
fs/exec.c | 27 +-
include/linux/binfmts.h | 1
include/linux/elf_ckpt.h | 97 ++++++++++
12 files changed, 788 insertions(+), 12 deletions(-)
include/linux/elf_ckpt.h | 97 +++++++++
12 files changed, 799 insertions(+), 12 deletions(-)
Index: linux-2.6.git/arch/x86/include/asm/elf.h
===================================================================
@ -429,7 +429,7 @@ Index: linux-2.6.git/fs/binfmt_elf_ckpt.c
===================================================================
--- /dev/null
+++ linux-2.6.git/fs/binfmt_elf_ckpt.c
@@ -0,0 +1,378 @@
@@ -0,0 +1,389 @@
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/fs.h>
@ -616,6 +616,11 @@ Index: linux-2.6.git/fs/binfmt_elf_ckpt.c
+ for (i = 0; i < nr_vma_found; i++) {
+ vma_entry_ptr = flex_array_get(fa, i);
+
+ /*
+ * This [heap] area is not explicitly existing on old kernels
+ * so if it's not found we need to setup brk area from saved
+ * brk value.
+ */
+ if (vma_entry_ptr->status & VMA_AREA_HEAP)
+ start_brk = vma_entry_ptr->start;
+
@ -708,6 +713,12 @@ Index: linux-2.6.git/fs/binfmt_elf_ckpt.c
+
+ bprm->p = start_stack;
+
+ if (start_brk == -1UL) {
+ pr_err("elf-ckpt: Can't find brk area\n");
+ ret = -ENOEXEC;
+ goto out_unmap;
+ }
+
+ current->mm->start_code = start_code;
+ current->mm->end_code = end_code;
+ current->mm->start_data = start_data;