The patch titled
arch: personality independent stack top
has been removed from the -mm tree. Its filename was
arch-personality-independent-stack-top.patch
This patch was dropped because an updated version will be merged
------------------------------------------------------
Subject: arch: personality independent stack top
From: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
This patch-set aims at removing the current limit on argv+env space aka.
MAX_ARG_PAGES.
The new mm is created before the binfmt code runs, the stack is placed at the
highest address supported by that architecture.
The argv+env data is then copied from the old mm into the new mm (which is
inactive at that time - this introduces some cache coherency issues).
Then we run the binfmt code, which will compute the final stack address. The
existing stack will be moved downwards (or upwards on PA-RISC) to the desired
place.
This 'trick' heavily relies on the MMU, so for no-MMU archs we stay with the
old approach.
This patch:
New arch macro STACK_TOP_MAX it gives the larges valid stack address for the
architecture in question.
It differs from STACK_TOP in that it will not distinguish between
personalities but will always return the largest possible address.
This is used to create the initial stack on execve, which we will move down to
the proper location once the binfmt code has figured out where that is.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Signed-off-by: Ollie Wild <aaw@xxxxxxxxxx>
Cc: <linux-arch@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/asm-alpha/a.out.h | 2 ++
include/asm-arm/a.out.h | 1 +
include/asm-arm26/a.out.h | 1 +
include/asm-avr32/a.out.h | 1 +
include/asm-cris/a.out.h | 1 +
include/asm-frv/mem-layout.h | 1 +
include/asm-h8300/a.out.h | 1 +
include/asm-i386/a.out.h | 1 +
include/asm-ia64/ustack.h | 1 +
include/asm-m32r/a.out.h | 1 +
include/asm-m68k/a.out.h | 1 +
include/asm-mips/a.out.h | 1 +
include/asm-parisc/a.out.h | 1 +
include/asm-powerpc/a.out.h | 3 +++
include/asm-s390/a.out.h | 1 +
include/asm-sh/a.out.h | 1 +
include/asm-sh64/a.out.h | 1 +
include/asm-sparc/a.out.h | 1 +
include/asm-sparc64/a.out.h | 2 ++
include/asm-um/a.out.h | 2 ++
include/asm-x86_64/a.out.h | 3 ++-
include/asm-xtensa/a.out.h | 1 +
22 files changed, 28 insertions(+), 1 deletion(-)
diff -puN include/asm-alpha/a.out.h~arch-personality-independent-stack-top include/asm-alpha/a.out.h
--- a/include/asm-alpha/a.out.h~arch-personality-independent-stack-top
+++ a/include/asm-alpha/a.out.h
@@ -101,6 +101,8 @@ struct exec
#define STACK_TOP \
(current->personality & ADDR_LIMIT_32BIT ? 0x80000000 : 0x00120000000UL)
+#define STACK_TOP_MAX 0x00120000000UL
+
#endif
#endif /* __A_OUT_GNU_H__ */
diff -puN include/asm-arm/a.out.h~arch-personality-independent-stack-top include/asm-arm/a.out.h
--- a/include/asm-arm/a.out.h~arch-personality-independent-stack-top
+++ a/include/asm-arm/a.out.h
@@ -30,6 +30,7 @@ struct exec
#ifdef __KERNEL__
#define STACK_TOP ((current->personality == PER_LINUX_32BIT) ? \
TASK_SIZE : TASK_SIZE_26)
+#define STACK_TOP_MAX TASK_SIZE
#endif
#ifndef LIBRARY_START_TEXT
diff -puN include/asm-arm26/a.out.h~arch-personality-independent-stack-top include/asm-arm26/a.out.h
--- a/include/asm-arm26/a.out.h~arch-personality-independent-stack-top
+++ a/include/asm-arm26/a.out.h
@@ -29,6 +29,7 @@ struct exec
#ifdef __KERNEL__
#define STACK_TOP TASK_SIZE
+#define STACK_TOP_MAX STACK_TOP
#endif
#ifndef LIBRARY_START_TEXT
diff -puN include/asm-avr32/a.out.h~arch-personality-independent-stack-top include/asm-avr32/a.out.h
--- a/include/asm-avr32/a.out.h~arch-personality-independent-stack-top
+++ a/include/asm-avr32/a.out.h
@@ -20,6 +20,7 @@ struct exec
#ifdef __KERNEL__
#define STACK_TOP TASK_SIZE
+#define STACK_TOP_MAX STACK_TOP
#endif
diff -puN include/asm-cris/a.out.h~arch-personality-independent-stack-top include/asm-cris/a.out.h
--- a/include/asm-cris/a.out.h~arch-personality-independent-stack-top
+++ a/include/asm-cris/a.out.h
@@ -8,6 +8,7 @@
/* grabbed from the intel stuff */
#define STACK_TOP TASK_SIZE
+#define STACK_TOP_MAX STACK_TOP
struct exec
diff -puN include/asm-frv/mem-layout.h~arch-personality-independent-stack-top include/asm-frv/mem-layout.h
--- a/include/asm-frv/mem-layout.h~arch-personality-independent-stack-top
+++ a/include/asm-frv/mem-layout.h
@@ -60,6 +60,7 @@
*/
#define BRK_BASE __UL(2 * 1024 * 1024 + PAGE_SIZE)
#define STACK_TOP __UL(2 * 1024 * 1024)
+#define STACK_TOP_MAX STACK_TOP
/* userspace process size */
#ifdef CONFIG_MMU
diff -puN include/asm-h8300/a.out.h~arch-personality-independent-stack-top include/asm-h8300/a.out.h
--- a/include/asm-h8300/a.out.h~arch-personality-independent-stack-top
+++ a/include/asm-h8300/a.out.h
@@ -20,6 +20,7 @@ struct exec
#ifdef __KERNEL__
#define STACK_TOP TASK_SIZE
+#define STACK_TOP_MAX STACK_TOP
#endif
diff -puN include/asm-i386/a.out.h~arch-personality-independent-stack-top include/asm-i386/a.out.h
--- a/include/asm-i386/a.out.h~arch-personality-independent-stack-top
+++ a/include/asm-i386/a.out.h
@@ -20,6 +20,7 @@ struct exec
#ifdef __KERNEL__
#define STACK_TOP TASK_SIZE
+#define STACK_TOP_MAX STACK_TOP
#endif
diff -puN include/asm-ia64/ustack.h~arch-personality-independent-stack-top include/asm-ia64/ustack.h
--- a/include/asm-ia64/ustack.h~arch-personality-independent-stack-top
+++ a/include/asm-ia64/ustack.h
@@ -11,6 +11,7 @@
/* The absolute hard limit for stack size is 1/2 of the mappable space in the region */
#define MAX_USER_STACK_SIZE (RGN_MAP_LIMIT/2)
#define STACK_TOP (0x6000000000000000UL + RGN_MAP_LIMIT)
+#define STACK_TOP_MAX STACK_TOP
#endif
/* Make a default stack size of 2GiB */
diff -puN include/asm-m32r/a.out.h~arch-personality-independent-stack-top include/asm-m32r/a.out.h
--- a/include/asm-m32r/a.out.h~arch-personality-independent-stack-top
+++ a/include/asm-m32r/a.out.h
@@ -20,6 +20,7 @@ struct exec
#ifdef __KERNEL__
#define STACK_TOP TASK_SIZE
+#define STACK_TOP_MAX STACK_TOP
#endif
diff -puN include/asm-m68k/a.out.h~arch-personality-independent-stack-top include/asm-m68k/a.out.h
--- a/include/asm-m68k/a.out.h~arch-personality-independent-stack-top
+++ a/include/asm-m68k/a.out.h
@@ -20,6 +20,7 @@ struct exec
#ifdef __KERNEL__
#define STACK_TOP TASK_SIZE
+#define STACK_TOP_MAX STACK_TOP
#endif
diff -puN include/asm-mips/a.out.h~arch-personality-independent-stack-top include/asm-mips/a.out.h
--- a/include/asm-mips/a.out.h~arch-personality-independent-stack-top
+++ a/include/asm-mips/a.out.h
@@ -40,6 +40,7 @@ struct exec
#ifdef CONFIG_64BIT
#define STACK_TOP (current->thread.mflags & MF_32BIT_ADDR ? TASK_SIZE32 : TASK_SIZE)
#endif
+#define STACK_TOP_MAX TASK_SIZE
#endif
diff -puN include/asm-parisc/a.out.h~arch-personality-independent-stack-top include/asm-parisc/a.out.h
--- a/include/asm-parisc/a.out.h~arch-personality-independent-stack-top
+++ a/include/asm-parisc/a.out.h
@@ -23,6 +23,7 @@ struct exec
* prumpf */
#define STACK_TOP TASK_SIZE
+#define STACK_TOP_MAX DEFAULT_TASK_SIZE
#endif
diff -puN include/asm-powerpc/a.out.h~arch-personality-independent-stack-top include/asm-powerpc/a.out.h
--- a/include/asm-powerpc/a.out.h~arch-personality-independent-stack-top
+++ a/include/asm-powerpc/a.out.h
@@ -26,9 +26,12 @@ struct exec
#define STACK_TOP (test_thread_flag(TIF_32BIT) ? \
STACK_TOP_USER32 : STACK_TOP_USER64)
+#define STACK_TOP_MAX STACK_TOP_USER64
+
#else /* __powerpc64__ */
#define STACK_TOP TASK_SIZE
+#define STACK_TOP_MAX STACK_TOP
#endif /* __powerpc64__ */
#endif /* __KERNEL__ */
diff -puN include/asm-s390/a.out.h~arch-personality-independent-stack-top include/asm-s390/a.out.h
--- a/include/asm-s390/a.out.h~arch-personality-independent-stack-top
+++ a/include/asm-s390/a.out.h
@@ -32,6 +32,7 @@ struct exec
#ifdef __KERNEL__
#define STACK_TOP TASK_SIZE
+#define STACK_TOP_MAX DEFAULT_TASK_SIZE
#endif
diff -puN include/asm-sh/a.out.h~arch-personality-independent-stack-top include/asm-sh/a.out.h
--- a/include/asm-sh/a.out.h~arch-personality-independent-stack-top
+++ a/include/asm-sh/a.out.h
@@ -20,6 +20,7 @@ struct exec
#ifdef __KERNEL__
#define STACK_TOP TASK_SIZE
+#define STACK_TOP_MAX STACK_TOP
#endif
diff -puN include/asm-sh64/a.out.h~arch-personality-independent-stack-top include/asm-sh64/a.out.h
--- a/include/asm-sh64/a.out.h~arch-personality-independent-stack-top
+++ a/include/asm-sh64/a.out.h
@@ -31,6 +31,7 @@ struct exec
#ifdef __KERNEL__
#define STACK_TOP TASK_SIZE
+#define STACK_TOP_MAX STACK_TOP
#endif
diff -puN include/asm-sparc/a.out.h~arch-personality-independent-stack-top include/asm-sparc/a.out.h
--- a/include/asm-sparc/a.out.h~arch-personality-independent-stack-top
+++ a/include/asm-sparc/a.out.h
@@ -92,6 +92,7 @@ struct relocation_info /* used when head
#include <asm/page.h>
#define STACK_TOP (PAGE_OFFSET - PAGE_SIZE)
+#define STACK_TOP_MAX STACK_TOP
#endif /* __KERNEL__ */
diff -puN include/asm-sparc64/a.out.h~arch-personality-independent-stack-top include/asm-sparc64/a.out.h
--- a/include/asm-sparc64/a.out.h~arch-personality-independent-stack-top
+++ a/include/asm-sparc64/a.out.h
@@ -101,6 +101,8 @@ struct relocation_info /* used when head
#define STACK_TOP (test_thread_flag(TIF_32BIT) ? \
STACK_TOP32 : STACK_TOP64)
+#define STACK_TOP_MAX STACK_TOP64
+
#endif
#endif /* !(__ASSEMBLY__) */
diff -puN include/asm-um/a.out.h~arch-personality-independent-stack-top include/asm-um/a.out.h
--- a/include/asm-um/a.out.h~arch-personality-independent-stack-top
+++ a/include/asm-um/a.out.h
@@ -16,4 +16,6 @@ extern int honeypot;
#define STACK_TOP \
CHOOSE_MODE((honeypot ? host_task_size : task_size), task_size)
+#define STACK_TOP_MAX STACK_TOP
+
#endif
diff -puN include/asm-x86_64/a.out.h~arch-personality-independent-stack-top include/asm-x86_64/a.out.h
--- a/include/asm-x86_64/a.out.h~arch-personality-independent-stack-top
+++ a/include/asm-x86_64/a.out.h
@@ -21,7 +21,8 @@ struct exec
#ifdef __KERNEL__
#include <linux/thread_info.h>
-#define STACK_TOP TASK_SIZE
+#define STACK_TOP TASK_SIZE
+#define STACK_TOP_MAX TASK_SIZE64
#endif
#endif /* __A_OUT_GNU_H__ */
diff -puN include/asm-xtensa/a.out.h~arch-personality-independent-stack-top include/asm-xtensa/a.out.h
--- a/include/asm-xtensa/a.out.h~arch-personality-independent-stack-top
+++ a/include/asm-xtensa/a.out.h
@@ -17,6 +17,7 @@
/* Note: the kernel needs the a.out definitions, even if only ELF is used. */
#define STACK_TOP TASK_SIZE
+#define STACK_TOP_MAX STACK_TOP
struct exec
{
_
Patches currently in -mm which might be from a.p.zijlstra@xxxxxxxxx are
lumpy-reclaim-v4.patch
split-mmap.patch
only-allow-nonlinear-vmas-for-ram-backed-filesystems.patch
percpu_counters-use-cpu-notifiers.patch
percpu_counters-use-for_each_online_cpu.patch
arch-personality-independent-stack-top.patch
audit-rework-execve-audit.patch
audit-rework-execve-audit-fix.patch
mm-move_page_tables_up.patch
mm-variable-length-argument-support.patch
mm-variable-length-argument-support-fix.patch
fix-raw_spinlock_t-vs-lockdep.patch
lockdep-sanitise-config_prove_locking.patch
lockdep-reduce-the-ifdeffery.patch
lockstat-core-infrastructure.patch
lockstat-core-infrastructure-fix.patch
lockstat-core-infrastructure-fix-fix.patch
lockstat-human-readability-tweaks.patch
lockstat-human-readability-tweaks-fix.patch
lockstat-hook-into-spinlock_t-rwlock_t-rwsem-and-mutex.patch
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