x86_64: prepare shared kernel/asm-offsets.c

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 85 insertions, 0 deletions

diff --git a/arch/x86_64/kernel/asm-offsets_64.c b/arch/x86_64/kernel/asm-offsets_64.c
new file mode 100644
index 000000000000..778953bc636c
--- /dev/null
+++ b/arch/x86_64/kernel/asm-offsets_64.c
@@ -0,0 +1,85 @@
+/*
+ * Generate definitions needed by assembly language modules.
+ * This code generates raw asm output which is post-processed to extract
+ * and format the required data.
+ */
+
+#include <linux/crypto.h>
+#include <linux/sched.h> 
+#include <linux/stddef.h>
+#include <linux/errno.h> 
+#include <linux/hardirq.h>
+#include <linux/suspend.h>
+#include <asm/pda.h>
+#include <asm/processor.h>
+#include <asm/segment.h>
+#include <asm/thread_info.h>
+#include <asm/ia32.h>
+
+#define DEFINE(sym, val) \
+        asm volatile("\n->" #sym " %0 " #val : : "i" (val))
+
+#define BLANK() asm volatile("\n->" : : )
+
+#define __NO_STUBS 1
+#undef __SYSCALL
+#undef _ASM_X86_64_UNISTD_H_
+#define __SYSCALL(nr, sym) [nr] = 1,
+static char syscalls[] = {
+#include <asm/unistd.h>
+};
+
+int main(void)
+{
+#define ENTRY(entry) DEFINE(tsk_ ## entry, offsetof(struct task_struct, entry))
+        ENTRY(state);
+        ENTRY(flags); 
+        ENTRY(thread); 
+        ENTRY(pid);
+        BLANK();
+#undef ENTRY
+#define ENTRY(entry) DEFINE(threadinfo_ ## entry, offsetof(struct thread_info, entry))
+        ENTRY(flags);
+        ENTRY(addr_limit);
+        ENTRY(preempt_count);
+        ENTRY(status);
+        BLANK();
+#undef ENTRY
+#define ENTRY(entry) DEFINE(pda_ ## entry, offsetof(struct x8664_pda, entry))
+        ENTRY(kernelstack); 
+        ENTRY(oldrsp); 
+        ENTRY(pcurrent); 
+        ENTRY(irqcount);
+        ENTRY(cpunumber);
+        ENTRY(irqstackptr);
+        ENTRY(data_offset);
+        BLANK();
+#undef ENTRY
+#ifdef CONFIG_IA32_EMULATION
+#define ENTRY(entry) DEFINE(IA32_SIGCONTEXT_ ## entry, offsetof(struct sigcontext_ia32, entry))
+        ENTRY(eax);
+        ENTRY(ebx);
+        ENTRY(ecx);
+        ENTRY(edx);
+        ENTRY(esi);
+        ENTRY(edi);
+        ENTRY(ebp);
+        ENTRY(esp);
+        ENTRY(eip);
+        BLANK();
+#undef ENTRY
+        DEFINE(IA32_RT_SIGFRAME_sigcontext,
+               offsetof (struct rt_sigframe32, uc.uc_mcontext));
+        BLANK();
+#endif
+        DEFINE(pbe_address, offsetof(struct pbe, address));
+        DEFINE(pbe_orig_address, offsetof(struct pbe, orig_address));
+        DEFINE(pbe_next, offsetof(struct pbe, next));
+        BLANK();
+        DEFINE(TSS_ist, offsetof(struct tss_struct, ist));
+        BLANK();
+        DEFINE(crypto_tfm_ctx_offset, offsetof(struct crypto_tfm, __crt_ctx));
+        BLANK();
+        DEFINE(__NR_syscall_max, sizeof(syscalls) - 1);
+        return 0;
+}