[patch 1/1] Uml: kludgy compilation fixes for x86-64 subarch modules support [for -mm]
From: blaisorblade
Date: Sun May 01 2005 - 05:28:11 EST
From: Paolo 'Blaisorblade' Giarrusso <blaisorblade@xxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxx>
These are some trivial fixes for the x86-64 subarch module support. The only
potential problem is that I have to modify arch/x86_64/kernel/module.c, to
avoid copying the whole of it.
I can't use it verbatim because it depends on a special vmalloc-like area for
modules, which for now (maybe that's to fix, I guess not) UML/x86-64 has not.
I went the easy way and reused the i386 vmalloc()-based allocator.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@xxxxxxxx>
---
linux-2.6.12-paolo/arch/um/sys-x86_64/Makefile | 7 ++++-
linux-2.6.12-paolo/arch/um/sys-x86_64/ksyms.c | 23 ++++++++++++++++++
linux-2.6.12-paolo/arch/um/sys-x86_64/um_module.c | 19 +++++++++++++++
linux-2.6.12-paolo/arch/x86_64/kernel/module.c | 4 +++
linux-2.6.12-paolo/include/asm-um/elf.h | 27 ++++++++++++++++++++++
5 files changed, 79 insertions(+), 1 deletion(-)
diff -puN /dev/null arch/um/sys-x86_64/ksyms.c
--- /dev/null 2005-04-30 21:19:18.900148040 +0200
+++ linux-2.6.12-paolo/arch/um/sys-x86_64/ksyms.c 2005-05-01 20:40:52.000000000 +0200
@@ -0,0 +1,23 @@
+#include "linux/module.h"
+#include "linux/in6.h"
+#include "linux/rwsem.h"
+#include "asm/byteorder.h"
+#include "asm/semaphore.h"
+#include "asm/uaccess.h"
+#include "asm/checksum.h"
+#include "asm/errno.h"
+
+EXPORT_SYMBOL(__down_failed);
+EXPORT_SYMBOL(__down_failed_interruptible);
+EXPORT_SYMBOL(__down_failed_trylock);
+EXPORT_SYMBOL(__up_wakeup);
+
+/*XXX: we need them because they would be exported by x86_64 */
+EXPORT_SYMBOL(__memcpy);
+EXPORT_SYMBOL(strcmp);
+EXPORT_SYMBOL(strcat);
+EXPORT_SYMBOL(strcpy);
+
+/* Networking helper routines. */
+/*EXPORT_SYMBOL(csum_partial_copy_from);
+EXPORT_SYMBOL(csum_partial_copy_to);*/
diff -puN arch/um/sys-x86_64/Makefile~uml-x86-64-compilation arch/um/sys-x86_64/Makefile
--- linux-2.6.12/arch/um/sys-x86_64/Makefile~uml-x86-64-compilation 2005-05-01 20:40:52.000000000 +0200
+++ linux-2.6.12-paolo/arch/um/sys-x86_64/Makefile 2005-05-01 20:40:52.000000000 +0200
@@ -4,14 +4,18 @@
# Licensed under the GPL
#
+#XXX: why into lib-y?
lib-y = bitops.o bugs.o csum-partial.o delay.o fault.o mem.o memcpy.o \
ptrace.o ptrace_user.o semaphore.o sigcontext.o signal.o \
syscalls.o sysrq.o thunk.o syscall_table.o
+obj-y := ksyms.o
+obj-$(CONFIG_MODULES) += module.o um_module.o
+
USER_OBJS := ptrace_user.o sigcontext.o
SYMLINKS = bitops.c csum-copy.S csum-partial.c csum-wrappers.c memcpy.S \
- semaphore.c thunk.S
+ semaphore.c thunk.S module.c
bitops.c-dir = lib
csum-copy.S-dir = lib
@@ -20,6 +24,7 @@ csum-wrappers.c-dir = lib
memcpy.S-dir = lib
semaphore.c-dir = kernel
thunk.S-dir = lib
+module.c-dir = kernel
CFLAGS_csum-partial.o := -Dcsum_partial=arch_csum_partial
diff -puN /dev/null arch/um/sys-x86_64/um_module.c
--- /dev/null 2005-04-30 21:19:18.900148040 +0200
+++ linux-2.6.12-paolo/arch/um/sys-x86_64/um_module.c 2005-05-01 20:40:52.000000000 +0200
@@ -0,0 +1,19 @@
+#include <linux/vmalloc.h>
+#include <linux/moduleloader.h>
+
+/*Copied from i386 arch/i386/kernel/module.c */
+void *module_alloc(unsigned long size)
+{
+ if (size == 0)
+ return NULL;
+ return vmalloc_exec(size);
+}
+
+/* Free memory returned from module_alloc */
+void module_free(struct module *mod, void *module_region)
+{
+ vfree(module_region);
+ /* FIXME: If module_region == mod->init_region, trim exception
+ table entries. */
+}
+
diff -puN arch/x86_64/kernel/module.c~uml-x86-64-compilation arch/x86_64/kernel/module.c
--- linux-2.6.12/arch/x86_64/kernel/module.c~uml-x86-64-compilation 2005-05-01 20:40:52.000000000 +0200
+++ linux-2.6.12-paolo/arch/x86_64/kernel/module.c 2005-05-01 20:40:52.000000000 +0200
@@ -30,9 +30,12 @@
#define DEBUGP(fmt...)
+#ifndef CONFIG_UML
void module_free(struct module *mod, void *module_region)
{
vfree(module_region);
+ /* FIXME: If module_region == mod->init_region, trim exception
+ table entries. */
}
void *module_alloc(unsigned long size)
@@ -51,6 +54,7 @@ void *module_alloc(unsigned long size)
return __vmalloc_area(area, GFP_KERNEL, PAGE_KERNEL_EXEC);
}
+#endif
/* We don't need anything special. */
int module_frob_arch_sections(Elf_Ehdr *hdr,
diff -puN include/asm-um/elf.h~uml-x86-64-compilation include/asm-um/elf.h
--- linux-2.6.12/include/asm-um/elf.h~uml-x86-64-compilation 2005-05-01 20:40:52.000000000 +0200
+++ linux-2.6.12-paolo/include/asm-um/elf.h 2005-05-01 20:40:52.000000000 +0200
@@ -21,6 +21,8 @@ extern long elf_aux_hwcap;
#define USE_ELF_CORE_DUMP
+#if defined(CONFIG_UML_X86) && !defined(CONFIG_64BIT)
+
#define R_386_NONE 0
#define R_386_32 1
#define R_386_PC32 2
@@ -34,4 +36,29 @@ extern long elf_aux_hwcap;
#define R_386_GOTPC 10
#define R_386_NUM 11
+#elif defined(CONFIG_UML_X86) && defined(CONFIG_64BIT)
+
+/* x86-64 relocation types */
+#define R_X86_64_NONE 0 /* No reloc */
+#define R_X86_64_64 1 /* Direct 64 bit */
+#define R_X86_64_PC32 2 /* PC relative 32 bit signed */
+#define R_X86_64_GOT32 3 /* 32 bit GOT entry */
+#define R_X86_64_PLT32 4 /* 32 bit PLT address */
+#define R_X86_64_COPY 5 /* Copy symbol at runtime */
+#define R_X86_64_GLOB_DAT 6 /* Create GOT entry */
+#define R_X86_64_JUMP_SLOT 7 /* Create PLT entry */
+#define R_X86_64_RELATIVE 8 /* Adjust by program base */
+#define R_X86_64_GOTPCREL 9 /* 32 bit signed pc relative
+ offset to GOT */
+#define R_X86_64_32 10 /* Direct 32 bit zero extended */
+#define R_X86_64_32S 11 /* Direct 32 bit sign extended */
+#define R_X86_64_16 12 /* Direct 16 bit zero extended */
+#define R_X86_64_PC16 13 /* 16 bit sign extended pc relative */
+#define R_X86_64_8 14 /* Direct 8 bit sign extended */
+#define R_X86_64_PC8 15 /* 8 bit sign extended pc relative */
+
+#define R_X86_64_NUM 16
+
+#endif
+
#endif
_
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/