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[PATCH] uml: cross-build support : kernel_offsets 

The next group of helpers is a bit trickier - they want the constants similar
to those in user-offsets.h, but we need target sc.h for it.  So we can't put
that into user-offsets (sc.h depends on it) and need the second generated
header for that stuff (kernel-offsets.h.  BFD...

Signed-off-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Al Viro 2005-05-05 16:15:25 -07:00 committed by Linus Torvalds
parent 6bae32d395
commit a31769ed3e
4 changed files with 76 additions and 0 deletions
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13
arch/um/Makefile
View File

@ -174,6 +174,19 @@ $(ARCH_DIR)/user-offsets.h: $(ARCH_DIR)/user-offsets.s
CLEAN_FILES += $(ARCH_DIR)/user-offsets.s $(ARCH_DIR)/user-offsets.h
$(ARCH_DIR)/kernel-offsets.s: $(ARCH_DIR)/sys-$(SUBARCH)/kernel-offsets.c \
$(ARCH_SYMLINKS) \
$(SYS_DIR)/sc.h \
include/asm include/linux/version.h \
include/config/MARKER \
$(ARCH_DIR)/include/user_constants.h
$(CC) $(CFLAGS) $(NOSTDINC_FLAGS) $(CPPFLAGS) -S -o $@ $<
$(ARCH_DIR)/kernel-offsets.h: $(ARCH_DIR)/kernel-offsets.s
$(call filechk,gen-asm-offsets)
CLEAN_FILES += $(ARCH_DIR)/kernel-offsets.s $(ARCH_DIR)/kernel-offsets.h
$(ARCH_DIR)/include/task.h: $(ARCH_DIR)/util/mk_task
$(call filechk,gen_header)

14
arch/um/include/common-offsets.h Normal file
View File

@ -0,0 +1,14 @@
/* for use by sys-$SUBARCH/kernel-offsets.c */
OFFSET(TASK_REGS, task_struct, thread.regs);
OFFSET(TASK_PID, task_struct, pid);
DEFINE(UM_KERN_PAGE_SIZE, PAGE_SIZE);
DEFINE(UM_NSEC_PER_SEC, NSEC_PER_SEC);
DEFINE_STR(UM_KERN_EMERG, KERN_EMERG);
DEFINE_STR(UM_KERN_ALERT, KERN_ALERT);
DEFINE_STR(UM_KERN_CRIT, KERN_CRIT);
DEFINE_STR(UM_KERN_ERR, KERN_ERR);
DEFINE_STR(UM_KERN_WARNING, KERN_WARNING);
DEFINE_STR(UM_KERN_NOTICE, KERN_NOTICE);
DEFINE_STR(UM_KERN_INFO, KERN_INFO);
DEFINE_STR(UM_KERN_DEBUG, KERN_DEBUG);

25
arch/um/sys-i386/kernel-offsets.c Normal file
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@ -0,0 +1,25 @@
#include <linux/config.h>
#include <linux/stddef.h>
#include <linux/sched.h>
#include <linux/time.h>
#include <asm/page.h>
#define DEFINE(sym, val) \
asm volatile("\n->" #sym " %0 " #val : : "i" (val))
#define STR(x) #x
#define DEFINE_STR(sym, val) asm volatile("\n->" #sym " " STR(val) " " #val: : )
#define BLANK() asm volatile("\n->" : : )
#define OFFSET(sym, str, mem) \
DEFINE(sym, offsetof(struct str, mem));
void foo(void)
{
OFFSET(TASK_DEBUGREGS, task_struct, thread.arch.debugregs);
#ifdef CONFIG_MODE_TT
OFFSET(TASK_EXTERN_PID, task_struct, thread.mode.tt.extern_pid);
#endif
#include <common-offsets.h>
}

24
arch/um/sys-x86_64/kernel-offsets.c Normal file
View File

@ -0,0 +1,24 @@
#include <linux/config.h>
#include <linux/stddef.h>
#include <linux/sched.h>
#include <linux/time.h>
#include <asm/page.h>
#define DEFINE(sym, val) \
asm volatile("\n->" #sym " %0 " #val : : "i" (val))
#define DEFINE_STR1(x) #x
#define DEFINE_STR(sym, val) asm volatile("\n->" #sym " " DEFINE_STR1(val) " " #val: : )
#define BLANK() asm volatile("\n->" : : )
#define OFFSET(sym, str, mem) \
DEFINE(sym, offsetof(struct str, mem));
void foo(void)
{
#ifdef CONFIG_MODE_TT
OFFSET(TASK_EXTERN_PID, task_struct, thread.mode.tt.extern_pid);
#endif
#include <common-offsets.h>
}