Messages in this thread Patch in this message |  | | Date | Fri, 9 Feb 2007 21:31:45 -0500 (EST) | Subject | [PATCH] Make aout executables work again | From | Parag Warudkar <> |
| |
This a reworked, replacement version of x86-fix-vdso-mapping-for-aout-executables-* series of patches in -mm.
1) Define arch_setup_additional_pages() as weak in linux/interp.h 2) Include linux/interp.h in appropriate places 3) Conditionally call arch_setup_additional_pages() from binfmt_*.c if the arch defines it 4) EXPORT_SYMBOL_GPL(arch_setup_additional_pages) for all x86{64}, powerpc, sh - binfmt_aout can be built as module 5) Get rid of ARCH_HAS_SETUP_ADDITIONAL_PAGES from various places 6) For x86_64 - define and export arch_setup_additional_pages as a wrapper over syscall32_setup_pages, call it from ia32_aout.c
Fully tested on x86. (Compile, boot and run the aout binary at http://ftp.funet.fi/pub/Linux/bin/as86.tar.Z). Other arches - changes are minimal but still I'll appreciate if someone tests them.
Signed-off-by: Parag Warudkar <parag.warudkar@gmail.com>
diff -urN --exclude='*git*' --exclude='scripts*' linux-2.6-us/arch/i386/kernel/sysenter.c linux-2.6-wk/arch/i386/kernel/sysenter.c --- linux-2.6-us/arch/i386/kernel/sysenter.c 2007-02-09 17:29:34.000000000 -0500 +++ linux-2.6-wk/arch/i386/kernel/sysenter.c 2007-02-09 17:54:48.000000000 -0500 @@ -137,6 +137,7 @@ up_write(&mm->mmap_sem); return ret; } +EXPORT_SYMBOL_GPL(arch_setup_additional_pages);
const char *arch_vma_name(struct vm_area_struct *vma) { diff -urN --exclude='*git*' --exclude='scripts*' linux-2.6-us/arch/powerpc/kernel/vdso.c linux-2.6-wk/arch/powerpc/kernel/vdso.c --- linux-2.6-us/arch/powerpc/kernel/vdso.c 2007-02-09 17:29:34.000000000 -0500 +++ linux-2.6-wk/arch/powerpc/kernel/vdso.c 2007-02-09 18:02:09.000000000 -0500 @@ -254,6 +254,7 @@ up_write(&mm->mmap_sem); return rc; } +EXPORT_SYMBOL_GPL(arch_setup_additional_pages);
const char *arch_vma_name(struct vm_area_struct *vma) { diff -urN --exclude='*git*' --exclude='scripts*' linux-2.6-us/arch/sh/kernel/vsyscall/vsyscall.c linux-2.6-wk/arch/sh/kernel/vsyscall/vsyscall.c --- linux-2.6-us/arch/sh/kernel/vsyscall/vsyscall.c 2007-02-09 17:29:34.000000000 -0500 +++ linux-2.6-wk/arch/sh/kernel/vsyscall/vsyscall.c 2007-02-09 18:02:51.000000000 -0500 @@ -85,6 +85,7 @@ up_write(&mm->mmap_sem); return ret; } +EXPORT_SYMBOL_GPL(arch_setup_additional_pages);
const char *arch_vma_name(struct vm_area_struct *vma) { diff -urN --exclude='*git*' --exclude='scripts*' linux-2.6-us/arch/x86_64/ia32/ia32_aout.c linux-2.6-wk/arch/x86_64/ia32/ia32_aout.c --- linux-2.6-us/arch/x86_64/ia32/ia32_aout.c 2007-01-26 18:49:37.000000000 -0500 +++ linux-2.6-wk/arch/x86_64/ia32/ia32_aout.c 2007-02-09 20:29:01.000000000 -0500 @@ -23,6 +23,7 @@ #include <linux/user.h> #include <linux/slab.h> #include <linux/binfmts.h> +#include <linux/interp.h> #include <linux/personality.h> #include <linux/init.h>
@@ -410,6 +411,12 @@ send_sig(SIGKILL, current, 0); return retval; } + + retval = arch_setup_additional_pages(bprm, EXSTACK_DEFAULT); + if (retval < 0) { + send_sig(SIGKILL, current, 0); + return retval; + }
current->mm->start_stack = (unsigned long)create_aout_tables((char __user *)bprm->p, bprm); diff -urN --exclude='*git*' --exclude='scripts*' linux-2.6-us/arch/x86_64/ia32/ia32_binfmt.c linux-2.6-wk/arch/x86_64/ia32/ia32_binfmt.c --- linux-2.6-us/arch/x86_64/ia32/ia32_binfmt.c 2007-01-27 17:23:08.000000000 -0500 +++ linux-2.6-wk/arch/x86_64/ia32/ia32_binfmt.c 2007-02-09 17:58:42.000000000 -0500 @@ -258,10 +258,6 @@
static void elf32_init(struct pt_regs *);
-#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1 -#define arch_setup_additional_pages syscall32_setup_pages -extern int syscall32_setup_pages(struct linux_binprm *, int exstack); - #include "../../../fs/binfmt_elf.c"
static void elf32_init(struct pt_regs *regs) diff -urN --exclude='*git*' --exclude='scripts*' linux-2.6-us/arch/x86_64/ia32/syscall32.c linux-2.6-wk/arch/x86_64/ia32/syscall32.c --- linux-2.6-us/arch/x86_64/ia32/syscall32.c 2007-02-09 17:29:34.000000000 -0500 +++ linux-2.6-wk/arch/x86_64/ia32/syscall32.c 2007-02-09 18:01:23.000000000 -0500 @@ -48,6 +48,12 @@ return ret; }
+int arch_setup_additional_pages(struct linux_binprm* bprm, int exstack) +{ + return syscall32_setup_pages(bprm, exstack); +} +EXPORT_SYMBOL_GPL(arch_setup_additional_pages); + const char *arch_vma_name(struct vm_area_struct *vma) { if (vma->vm_start == VSYSCALL32_BASE && diff -urN --exclude='*git*' --exclude='scripts*' linux-2.6-us/fs/binfmt_aout.c linux-2.6-wk/fs/binfmt_aout.c --- linux-2.6-us/fs/binfmt_aout.c 2007-01-26 18:49:39.000000000 -0500 +++ linux-2.6-wk/fs/binfmt_aout.c 2007-02-09 17:53:33.000000000 -0500 @@ -22,6 +22,7 @@ #include <linux/user.h> #include <linux/slab.h> #include <linux/binfmts.h> +#include <linux/interp.h> #include <linux/personality.h> #include <linux/init.h>
@@ -445,6 +446,14 @@ send_sig(SIGKILL, current, 0); return retval; } + + if(arch_setup_additional_pages) { + retval = arch_setup_additional_pages(bprm, EXSTACK_DEFAULT); + if (retval < 0) { + send_sig(SIGKILL, current, 0); + return retval; + } + }
current->mm->start_stack = (unsigned long) create_aout_tables((char __user *) bprm->p, bprm); diff -urN --exclude='*git*' --exclude='scripts*' linux-2.6-us/fs/binfmt_elf.c linux-2.6-wk/fs/binfmt_elf.c --- linux-2.6-us/fs/binfmt_elf.c 2007-01-27 17:23:08.000000000 -0500 +++ linux-2.6-wk/fs/binfmt_elf.c 2007-02-09 17:48:18.000000000 -0500 @@ -20,6 +20,7 @@ #include <linux/errno.h> #include <linux/signal.h> #include <linux/binfmts.h> +#include <linux/interp.h> #include <linux/string.h> #include <linux/file.h> #include <linux/fcntl.h> @@ -974,13 +975,13 @@
set_binfmt(&elf_format);
-#ifdef ARCH_HAS_SETUP_ADDITIONAL_PAGES - retval = arch_setup_additional_pages(bprm, executable_stack); - if (retval < 0) { - send_sig(SIGKILL, current, 0); - goto out; + if (arch_setup_additional_pages) { + retval = arch_setup_additional_pages(bprm, executable_stack); + if (retval < 0) { + send_sig(SIGKILL, current, 0); + goto out; + } } -#endif /* ARCH_HAS_SETUP_ADDITIONAL_PAGES */
compute_creds(bprm); current->flags &= ~PF_FORKNOEXEC; diff -urN --exclude='*git*' --exclude='scripts*' linux-2.6-us/include/linux/interp.h linux-2.6-wk/include/linux/interp.h --- linux-2.6-us/include/linux/interp.h 1969-12-31 19:00:00.000000000 -0500 +++ linux-2.6-wk/include/linux/interp.h 2007-02-09 21:26:34.000000000 -0500 @@ -0,0 +1,8 @@ +#ifndef _LINUX_INTERP_H +#define _LINUX_INTERP_H + +struct linux_binprm; + +extern int __attribute__((weak)) + arch_setup_additional_pages(struct linux_binprm*, int); +#endif /* _LINUX_INTERP_H */ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
|  |