Merge tp1.ruhr-uni-bochum.de:/scratch/kai/kernel/v2.5/linux-2.5

into tp1.ruhr-uni-bochum.de:/scratch/kai/kernel/v2.5/linux-2.5.make

Makefile

@@ -394,6 +394,17 @@ $(SUBDIRS): .hdepend prepare
 prepare: include/linux/version.h include/asm include/config/MARKER
 	@echo '  Starting the build. KBUILD_BUILTIN=$(KBUILD_BUILTIN) KBUILD_MODULES=$(KBUILD_MODULES)'
 
+#	We need to build init/vermagic.o before descending since all modules
+#	(*.ko) need it already
+
+ifdef CONFIG_MODULES
+
+prepare: init/vermagic.o
+
+init/vermagic.o: include/linux/version.h
+
+endif
+
 #	This can be used by arch/$ARCH/Makefile to preprocess
 #	their vmlinux.lds.S file
 

arch/alpha/vmlinux.lds.S

@@ -47,6 +47,7 @@ SECTIONS
   }
 
   .kstrtab : { *(.kstrtab) }
+  __vermagic : { *(__vermagic) }
   .rodata : { *(.rodata) *(.rodata.*) }
 
   /* Startup code */

arch/arm/vmlinux-armo.lds.in

@@ -64,6 +64,7 @@ SECTIONS
 	}
 
 	.kstrtab : { *(.kstrtab) }
+	__vermagic : { *(__vermagic) }
 
 	. = ALIGN(16);
 	__ex_table : {			/* Exception table		*/

arch/arm/vmlinux-armv.lds.in

@@ -67,6 +67,7 @@ SECTIONS
 	}
 
 	.kstrtab : { *(.kstrtab) }
+	__vermagic : { *(__vermagic) }
 
 	. = ALIGN(16);
 	__ex_table : {			/* Exception table		*/

arch/cris/vmlinux.lds.S

@@ -33,6 +33,7 @@ SECTIONS
 
 	.rodata : { *(.rodata) *(.rodata.__*) }
 	.kstrtab : { *(.kstrtab) }
+	__vermagic : { *(__vermagic) }
 
 	. = ALIGN(4);                /* Exception table */
   	__start___ex_table = .;

arch/i386/vmlinux.lds.S

@@ -20,6 +20,7 @@ SECTIONS
 
   .rodata : { *(.rodata) *(.rodata.*) }
   .kstrtab : { *(.kstrtab) }
+  __vermagic : { *(__vermagic) }
 
   . = ALIGN(16);		/* Exception table */
   __start___ex_table = .;

arch/ia64/vmlinux.lds.S

@@ -90,6 +90,8 @@ SECTIONS
 	{ *(.rodata) *(.rodata.*) }
   .kstrtab : AT(ADDR(.kstrtab) - PAGE_OFFSET)
 	{ *(.kstrtab) }
+  __vermagic : AT(ADDR(__vermagic) - PAGE_OFFSET)
+	{ *(__vermagic) }
   .opd : AT(ADDR(.opd) - PAGE_OFFSET)
 	{ *(.opd) }
 

arch/m68k/vmlinux-std.lds

@@ -14,6 +14,7 @@ SECTIONS
 	} = 0x4e75
   .rodata : { *(.rodata) *(.rodata.*) }
   .kstrtab : { *(.kstrtab) }
+  __vermagic : { *(__vermagic) }
 
   . = ALIGN(16);		/* Exception table */
   __start___ex_table = .;

arch/m68k/vmlinux-sun3.lds

@@ -14,7 +14,7 @@ SECTIONS
 	*(.gnu.warning)
 	} = 0x4e75
   .kstrtab : { *(.kstrtab) }
-
+  __vermagic : { *(__vermagic) }
 
   _etext = .;			/* End of text section */
 

arch/m68knommu/vmlinux.lds.S

@@ -224,6 +224,7 @@ SECTIONS {
 
 		. = ALIGN(0x4) ;
 		*(.kstrtab)
+		*(__vermagic)
 
 		. = ALIGN(16);          /* Exception table              */
 		__start___ex_table = .;

arch/mips/vmlinux.lds.S

@@ -15,6 +15,7 @@ SECTIONS
     *(.gnu.warning)
   } =0
   .kstrtab : { *(.kstrtab) }
+  __vermagic : { *(__vermagic) }
 
   . = ALIGN(16);		/* Exception table */
   __start___ex_table = .;

arch/mips64/ld.script.elf64

@@ -25,6 +25,7 @@ SECTIONS
     *(.gnu.warning)
   } = 0
   .kstrtab : { *(.kstrtab) }
+  __vermagic : { *(__vermagic) }
 
   . = ALIGN(16);		/* Exception table */
   __start___ex_table = .;

arch/mips64/vmlinux.lds.S

@@ -14,6 +14,7 @@ SECTIONS
     *(.gnu.warning)
   } =0
   .kstrtab : { *(.kstrtab) }
+  __vermagic : { *(__vermagic) }
 
   . = ALIGN(16);		/* Exception table */
   __start___ex_table = .;

arch/parisc/vmlinux.lds.S

@@ -34,6 +34,7 @@ SECTIONS
   . = ALIGN(16);
   .rodata : { *(.rodata) *(.rodata.*) }
   .kstrtab : { *(.kstrtab) }
+  __vermagic : { *(__vermagic) }
 
   .data BLOCK(8192) : {			/* Data without special */
 	data_start = .;

arch/ppc/vmlinux.lds.S

@@ -47,6 +47,7 @@ SECTIONS
     *(.rodata1)
   }
   .kstrtab   : { *(.kstrtab) }
+  __vermagic : { *(__vermagic) }
   .fini      : { *(.fini)    } =0
   .ctors     : { *(.ctors)   }
   .dtors     : { *(.dtors)   }

arch/ppc64/boot/zImage.lds

@@ -42,6 +42,7 @@ SECTIONS
     *(.rodata1)
   }
   .kstrtab   : { *(.kstrtab) }
+  __vermagic : { *(__vermagic) }
   .fini      : { *(.fini)    } =0
   .ctors     : { *(.ctors)   }
   .dtors     : { *(.dtors)   }

arch/s390/vmlinux.lds.S

@@ -19,6 +19,7 @@ SECTIONS
 
   .rodata : { *(.rodata) *(.rodata.*) }
   .kstrtab : { *(.kstrtab) }
+  __vermagic : { *(__vermagic) }
 
   . = ALIGN(16);		/* Exception table */
   __start___ex_table = .;

arch/s390x/vmlinux.lds.S

@@ -19,6 +19,7 @@ SECTIONS
 
   .rodata : { *(.rodata) *(.rodata.*) }
   .kstrtab : { *(.kstrtab) }
+  __vermagic : { *(__vermagic) }
 
   . = ALIGN(16);		/* Exception table */
   __start___ex_table = .;

arch/sh/vmlinux.lds.S

@@ -27,6 +27,7 @@ SECTIONS
 	} = 0x0009
   .rodata : { *(.rodata) *(.rodata.*) }
   .kstrtab : { *(.kstrtab) }
+  __vermagic : { *(__vermagic) }
 
   . = ALIGN(16);		/* Exception table */
   __start___ex_table = .;

arch/sparc64/vmlinux.lds.S

@@ -43,6 +43,7 @@ SECTIONS
   __gpl_ksymtab : { *(__gpl_ksymtab) }
   __stop___gpl_ksymtab = .;
   __kstrtab  : { *(.kstrtab) }
+  __vermagic : { *(__vermagic) }
   __start___kallsyms = .;	/* All kernel symbols */
   __kallsyms : { *(__kallsyms) }
   __stop___kallsyms = .;

arch/um/uml.lds.S

@@ -32,6 +32,7 @@ SECTIONS
     *(.gnu.linkonce.t*)
   }
   .kstrtab : { *(.kstrtab) }
+  __vermagic : { *(__vermagic) }
 
   . = ALIGN(16);		/* Exception table */
   __start___ex_table = .;

arch/v850/vmlinux.lds.S

@@ -41,6 +41,7 @@
 			*(.rodata)					      \
 		. = ALIGN (0x4) ;					      \
 			*(.kstrtab)					      \
+			*(__vermagic)					      \
 		. = ALIGN (4) ;						      \
 		    	*(.call_table_data)				      \
 			*(.call_table_text)				      \

arch/x86_64/vmlinux.lds.S

@@ -20,6 +20,7 @@ SECTIONS
 
   .rodata : { *(.rodata) *(.rodata.*) }
   .kstrtab : { *(.kstrtab) }
+  __vermagic : { *(__vermagic) }
 
   . = ALIGN(16);		/* Exception table */
   __start___ex_table = .;

include/asm-i386/module.h

 #ifndef _ASM_I386_MODULE_H
 #define _ASM_I386_MODULE_H
+
 /* x86 is simple */
 struct mod_arch_specific
 {
@@ -8,4 +9,47 @@ struct mod_arch_specific
 #define Elf_Shdr Elf32_Shdr
 #define Elf_Sym Elf32_Sym
 #define Elf_Ehdr Elf32_Ehdr
+
+#ifdef CONFIG_M386
+#define MODULE_PROC_FAMILY "386 "
+#elif CONFIG_M486
+#define MODULE_PROC_FAMILY "486 "
+#elif CONFIG_M586
+#define MODULE_PROC_FAMILY "586 "
+#elif CONFIG_M586TSC
+#define MODULE_PROC_FAMILY "586TSC "
+#elif CONFIG_M586MMX
+#define MODULE_PROC_FAMILY "586MMX "
+#elif CONFIG_M686
+#define MODULE_PROC_FAMILY "686 "
+#elif CONFIG_MPENTIUMII
+#define MODULE_PROC_FAMILY "PENTIUMII "
+#elif CONFIG_MPENTIUMIII
+#define MODULE_PROC_FAMILY "PENTIUMIII "
+#elif CONFIG_MPENTIUM4
+#define MODULE_PROC_FAMILY "PENTIUM4 "
+#elif CONFIG_MK6
+#define MODULE_PROC_FAMILY "K6 "
+#elif CONFIG_MK7
+#define MODULE_PROC_FAMILY "K7 "
+#elif CONFIG_MK8
+#define MODULE_PROC_FAMILY "K8 "
+#elif CONFIG_MELAN
+#define MODULE_PROC_FAMILY "ELAN "
+#elif CONFIG_MCRUSOE
+#define MODULE_PROC_FAMILY "CRUSOE "
+#elif CONFIG_MWINCHIPC6
+#define MODULE_PROC_FAMILY "WINCHIPC6 "
+#elif CONFIG_MWINCHIP2
+#define MODULE_PROC_FAMILY "WINCHIP2 "
+#elif CONFIG_MWINCHIP3D
+#define MODULE_PROC_FAMILY "WINCHIP3D "
+#elif CONFIG_MCYRIXIII
+#define MODULE_PROC_FAMILY "CYRIXIII "
+#else
+#error unknown processor family
+#endif
+
+#define MODULE_ARCH_VERMAGIC MODULE_PROC_FAMILY
+
 #endif /* _ASM_I386_MODULE_H */

init/Makefile

@@ -3,6 +3,7 @@
 #
 
 obj-y			:= main.o version.o do_mounts.o initramfs.o
+obj-$(CONFIG_MODULES)	+= vermagic.o
 
 # files to be removed upon make clean
 clean-files := ../include/linux/compile.h

init/vermagic.c

+#include <linux/version.h>
+#include <linux/module.h>
+
+/* Simply sanity version stamp for modules. */
+#ifdef CONFIG_SMP
+#define MODULE_VERMAGIC_SMP "SMP "
+#else
+#define MODULE_VERMAGIC_SMP ""
+#endif
+#ifdef CONFIG_PREEMPT
+#define MODULE_VERMAGIC_PREEMPT "preempt "
+#else
+#define MODULE_VERMAGIC_PREEMPT ""
+#endif
+#ifndef MODULE_ARCH_VERMAGIC
+#define MODULE_ARCH_VERMAGIC ""
+#endif
+
+const char vermagic[] __attribute__((section("__vermagic"))) =
+       UTS_RELEASE " "
+       MODULE_VERMAGIC_SMP MODULE_VERMAGIC_PREEMPT MODULE_ARCH_VERMAGIC
+       "gcc-" __stringify(__GNUC__) "." __stringify(__GNUC_MINOR__);

kernel/module.c

@@ -963,6 +963,9 @@ static void set_license(struct module *mod, Elf_Shdr *sechdrs, int licenseidx)
 	}
 }
 
+/* From init/vermagic.o */
+extern char vermagic[];
+
 /* Allocate and load the module: note that size of section 0 is always
    zero, and we rely on this for optional sections. */
 static struct module *load_module(void *umod,
@@ -973,7 +976,7 @@ static struct module *load_module(void *umod,
 	Elf_Shdr *sechdrs;
 	char *secstrings, *args;
 	unsigned int i, symindex, exportindex, strindex, setupindex, exindex,
-		modindex, obsparmindex, licenseindex, gplindex;
+		modindex, obsparmindex, licenseindex, gplindex, vmagindex;
 	long arglen;
 	struct module *mod;
 	long err = 0;
@@ -1012,7 +1015,7 @@ static struct module *load_module(void *umod,
 	exportindex = setupindex = obsparmindex = gplindex = licenseindex = 0;
 
 	/* And these should exist, but gcc whinges if we don't init them */
-	symindex = strindex = exindex = modindex = 0;
+	symindex = strindex = exindex = modindex = vmagindex = 0;
 
 	/* Find where important sections are */
 	for (i = 1; i < hdr->e_shnum; i++) {
@@ -1062,6 +1065,11 @@ static struct module *load_module(void *umod,
 			/* EXPORT_SYMBOL_GPL() */
 			DEBUGP("GPL symbols found in section %u\n", i);
 			gplindex = i;
+		} else if (strcmp(secstrings+sechdrs[i].sh_name,
+				  "__vermagic") == 0) {
+			/* Version magic. */
+			DEBUGP("Version magic found in section %u\n", i);
+			vmagindex = i;
 		}
 #ifdef CONFIG_KALLSYMS
 		/* symbol and string tables for decoding later. */
@@ -1082,6 +1090,18 @@ static struct module *load_module(void *umod,
 	}
 	mod = (void *)sechdrs[modindex].sh_addr;
 
+	/* This is allowed: modprobe --force will strip it. */
+	if (!vmagindex) {
+		tainted |= TAINT_FORCED_MODULE;
+		printk(KERN_WARNING "%s: no version magic, tainting kernel.\n",
+		       mod->name);
+	} else if (strcmp((char *)sechdrs[vmagindex].sh_addr, vermagic) != 0) {
+		printk(KERN_ERR "%s: version magic '%s' should be '%s'\n",
+		       mod->name, (char*)sechdrs[vmagindex].sh_addr, vermagic);
+		err = -ENOEXEC;
+		goto free_hdr;
+	}
+
 	/* Now copy in args */
 	arglen = strlen_user(uargs);
 	if (!arglen) {

scripts/Makefile.build

@@ -176,10 +176,15 @@ quiet_cmd_link_multi-y = LD      $@
 cmd_link_multi-y = $(LD) $(LDFLAGS) $(EXTRA_LDFLAGS) -r -o $@ $(filter $(addprefix $(obj)/,$($(subst $(obj)/,,$(@:.o=-objs))) $($(subst $(obj)/,,$(@:.o=-y)))),$^)
 
 quiet_cmd_link_multi-m = LD [M]  $@
-cmd_link_multi-m = $(LD) $(LDFLAGS) $(EXTRA_LDFLAGS) $(LDFLAGS_MODULE) -o $@ $(filter $(addprefix $(obj)/,$($(subst $(obj)/,,$(@:.ko=-objs))) $($(subst $(obj)/,,$(@:.ko=-y)))),$^)
+cmd_link_multi-m = $(LD) $(LDFLAGS) $(EXTRA_LDFLAGS) $(LDFLAGS_MODULE) -o $@ $(filter $(addprefix $(obj)/,$($(subst $(obj)/,,$(@:.ko=-objs))) $($(subst $(obj)/,,$(@:.ko=-y)))),$^) init/vermagic.o
 
 quiet_cmd_link_single-m = LD [M]  $@
-cmd_link_single-m = $(LD) $(LDFLAGS) $(EXTRA_LDFLAGS) $(LDFLAGS_MODULE) -o $@ $<
+cmd_link_single-m = $(LD) $(LDFLAGS) $(EXTRA_LDFLAGS) $(LDFLAGS_MODULE) -o $@ $< init/vermagic.o
+
+# Don't rebuilt vermagic.o unless we actually are in the init/ dir
+ifneq ($(obj),init)
+init/vermagic.o: ;
+endif
 
 # We would rather have a list of rules like
 # 	foo.o: $(foo-objs)
@@ -188,10 +193,10 @@ cmd_link_single-m = $(LD) $(LDFLAGS) $(EXTRA_LDFLAGS) $(LDFLAGS_MODULE) -o $@ $<
 $(multi-used-y) : %.o: $(multi-objs-y) FORCE
 	$(call if_changed,link_multi-y)
 
-$(multi-used-m:.o=.ko) : %.ko: $(multi-objs-m) FORCE
+$(multi-used-m:.o=.ko) : %.ko: $(multi-objs-m) init/vermagic.o FORCE
 	$(call if_changed,link_multi-m)
 
-$(single-used-m:.o=.ko) : %.ko: %.o FORCE
+$(single-used-m:.o=.ko) : %.ko: %.o init/vermagic.o FORCE
 	$(call if_changed,link_single-m)
 
 targets += $(multi-used-y) $(multi-used-m:.o=.ko) $(single-used-m:.o=.ko)