From: Andi Kleen <ak@suse.de>
To: patches@x86-64.org, linux-kernel@vger.kernel.org
Subject: [PATCH x86 for review III] [23/29] x86: Don't require the vDSO for handling a.out signals
Date: Mon, 12 Feb 2007 17:51:43 +0100 (CET) [thread overview]
Message-ID: <20070212165144.0460313E1A@wotan.suse.de> (raw)
In-Reply-To: <20070212551.664370000@suse.de>
and in other strange binfmts. vDSO is not necessarily mapped there.
Signed-off-by: Andi Kleen <ak@suse.de>
---
arch/i386/kernel/signal.c | 6 +++++-
arch/x86_64/ia32/ia32_signal.c | 7 ++++++-
fs/binfmt_elf.c | 3 ++-
include/linux/binfmts.h | 1 +
4 files changed, 14 insertions(+), 3 deletions(-)
Index: linux/arch/i386/kernel/signal.c
===================================================================
--- linux.orig/arch/i386/kernel/signal.c
+++ linux/arch/i386/kernel/signal.c
@@ -21,6 +21,7 @@
#include <linux/suspend.h>
#include <linux/ptrace.h>
#include <linux/elf.h>
+#include <linux/binfmts.h>
#include <asm/processor.h>
#include <asm/ucontext.h>
#include <asm/uaccess.h>
@@ -349,7 +350,10 @@ static int setup_frame(int sig, struct k
goto give_sigsegv;
}
- restorer = (void *)VDSO_SYM(&__kernel_sigreturn);
+ if (current->binfmt->hasvdso)
+ restorer = (void *)VDSO_SYM(&__kernel_sigreturn);
+ else
+ restorer = (void *)&frame->retcode;
if (ka->sa.sa_flags & SA_RESTORER)
restorer = ka->sa.sa_restorer;
Index: linux/arch/x86_64/ia32/ia32_signal.c
===================================================================
--- linux.orig/arch/x86_64/ia32/ia32_signal.c
+++ linux/arch/x86_64/ia32/ia32_signal.c
@@ -21,6 +21,7 @@
#include <linux/stddef.h>
#include <linux/personality.h>
#include <linux/compat.h>
+#include <linux/binfmts.h>
#include <asm/ucontext.h>
#include <asm/uaccess.h>
#include <asm/i387.h>
@@ -449,7 +450,11 @@ int ia32_setup_frame(int sig, struct k_s
/* Return stub is in 32bit vsyscall page */
{
- void __user *restorer = VSYSCALL32_SIGRETURN;
+ void __user *restorer;
+ if (current->binfmt->hasvdso)
+ restorer = VSYSCALL32_SIGRETURN;
+ else
+ restorer = (void *)&frame->retcode;
if (ka->sa.sa_flags & SA_RESTORER)
restorer = ka->sa.sa_restorer;
err |= __put_user(ptr_to_compat(restorer), &frame->pretcode);
Index: linux/fs/binfmt_elf.c
===================================================================
--- linux.orig/fs/binfmt_elf.c
+++ linux/fs/binfmt_elf.c
@@ -76,7 +76,8 @@ static struct linux_binfmt elf_format =
.load_binary = load_elf_binary,
.load_shlib = load_elf_library,
.core_dump = elf_core_dump,
- .min_coredump = ELF_EXEC_PAGESIZE
+ .min_coredump = ELF_EXEC_PAGESIZE,
+ .hasvdso = 1
};
#define BAD_ADDR(x) ((unsigned long)(x) >= TASK_SIZE)
Index: linux/include/linux/binfmts.h
===================================================================
--- linux.orig/include/linux/binfmts.h
+++ linux/include/linux/binfmts.h
@@ -59,6 +59,7 @@ struct linux_binfmt {
int (*load_shlib)(struct file *);
int (*core_dump)(long signr, struct pt_regs * regs, struct file * file);
unsigned long min_coredump; /* minimal dump size */
+ int hasvdso;
};
extern int register_binfmt(struct linux_binfmt *);
next prev parent reply other threads:[~2007-02-12 16:53 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-02-12 16:51 [PATCH x86 for review III] [1/29] i386: avoid gcc extension Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [2/29] i386: support Classic MediaGXm Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [3/29] i386: entry.S END/ENDPROC annotations Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [4/29] x86_64: clean up sparsemem memory_present call Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [5/29] i386: arch/i386/kernel/alternative.c should #include <asm/bugs.h> Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [6/29] i386: Remove unused kernel config option X86_XADD Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [7/29] x86_64: update IO-APIC dest field to 8-bit for xAPIC Andi Kleen
2007-02-12 19:49 ` Eric W. Biederman
2007-02-12 16:51 ` [PATCH x86 for review III] [8/29] x86_64: avoid warning message livelock Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [9/29] x86_64: Minor patch for compilation warning in x86_64 signal code Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [10/29] i386: don't include bugs.h Andi Kleen
2007-02-12 17:35 ` Jörn Engel
2007-02-12 18:33 ` Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [11/29] i386: add option to show more code in oops reports Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [12/29] x86_64: 32-bit ptrace mangles sixth system call argument Andi Kleen
2007-02-12 22:04 ` Chuck Ebbert
2007-02-12 22:26 ` Andi Kleen
2007-02-14 17:52 ` Jeff Dike
2007-02-12 16:51 ` [PATCH x86 for review III] [13/29] i386: geode configuration fixes Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [15/29] x86_64: Fix wrong gcc check in bitops.h Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [16/29] i386: Remove fastcall in paravirt.[ch] Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [17/29] x86: Add new CPUID bits for AMD Family 10 CPUs in /proc/cpuinfo Andi Kleen
2007-02-12 22:11 ` Chuck Ebbert
2007-02-12 22:23 ` Andi Kleen
2007-02-12 22:37 ` Chuck Ebbert
2007-02-12 22:38 ` Andi Kleen
2007-02-12 23:04 ` Chuck Ebbert
2007-02-12 16:51 ` [PATCH x86 for review III] [18/29] i386: Add L3 cache support to AMD CPUID4 emulation Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [19/29] x86: Enable NMI watchdog for AMD Family 0x10 CPUs Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [20/29] i386: Fix warning in microcode.c Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [21/29] i386: Fix warning in cpu initialization Andi Kleen
2007-02-12 16:51 ` Andi Kleen [this message]
2007-02-12 16:51 ` [PATCH x86 for review III] [24/29] x86_64: -mm merge plans for 2.6.21 Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [25/29] i386: paravirt unhandled fallthrough Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [26/29] i386: Move mce_disabled to asm/mce.h Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [27/29] i386: Rename cpu_gdt_descr and remove extern declaration from smpboot.c Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [28/29] i386: Remove extern declaration from mm/discontig.c, put in header Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [29/29] x86: Unify pcspeaker platform device code between i386/x86-64 Andi Kleen
2007-02-12 19:43 ` [PATCH x86 for review III] [1/29] i386: avoid gcc extension Jochen Voß
2007-02-12 20:18 ` Randy Dunlap
2007-02-13 15:11 ` Arnd Bergmann
2007-02-13 16:10 ` Randy Dunlap
2007-02-13 16:52 ` Andi Kleen
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