summaryrefslogtreecommitdiff
path: root/arch/arm/kernel/asm-offsets.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/arm/kernel/asm-offsets.c
downloadconfigs-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/arm/kernel/asm-offsets.c')
-rw-r--r--arch/arm/kernel/asm-offsets.c83
1 files changed, 83 insertions, 0 deletions
diff --git a/arch/arm/kernel/asm-offsets.c b/arch/arm/kernel/asm-offsets.c
new file mode 100644
index 00000000000..99d43259ff8
--- /dev/null
+++ b/arch/arm/kernel/asm-offsets.c
@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 1995-2003 Russell King
+ * 2001-2002 Keith Owens
+ *
+ * Generate definitions needed by assembly language modules.
+ * This code generates raw asm output which is post-processed to extract
+ * and format the required data.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <asm/mach/arch.h>
+#include <asm/thread_info.h>
+#include <asm/memory.h>
+
+/*
+ * Make sure that the compiler and target are compatible.
+ */
+#if defined(__APCS_26__)
+#error Sorry, your compiler targets APCS-26 but this kernel requires APCS-32
+#endif
+/*
+ * GCC 2.95.1, 2.95.2: ignores register clobber list in asm().
+ * GCC 3.0, 3.1: general bad code generation.
+ * GCC 3.2.0: incorrect function argument offset calculation.
+ * GCC 3.2.x: miscompiles NEW_AUX_ENT in fs/binfmt_elf.c
+ * (http://gcc.gnu.org/PR8896) and incorrect structure
+ * initialisation in fs/jffs2/erase.c
+ */
+#if __GNUC__ < 2 || \
+ (__GNUC__ == 2 && __GNUC_MINOR__ < 95) || \
+ (__GNUC__ == 2 && __GNUC_MINOR__ == 95 && __GNUC_PATCHLEVEL__ != 0 && \
+ __GNUC_PATCHLEVEL__ < 3) || \
+ (__GNUC__ == 3 && __GNUC_MINOR__ < 3)
+#error Your compiler is too buggy; it is known to miscompile kernels.
+#error Known good compilers: 2.95.3, 2.95.4, 2.96, 3.3
+#endif
+
+/* Use marker if you need to separate the values later */
+
+#define DEFINE(sym, val) \
+ asm volatile("\n->" #sym " %0 " #val : : "i" (val))
+
+#define BLANK() asm volatile("\n->" : : )
+
+int main(void)
+{
+ DEFINE(TSK_ACTIVE_MM, offsetof(struct task_struct, active_mm));
+ BLANK();
+ DEFINE(TI_FLAGS, offsetof(struct thread_info, flags));
+ DEFINE(TI_PREEMPT, offsetof(struct thread_info, preempt_count));
+ DEFINE(TI_ADDR_LIMIT, offsetof(struct thread_info, addr_limit));
+ DEFINE(TI_TASK, offsetof(struct thread_info, task));
+ DEFINE(TI_EXEC_DOMAIN, offsetof(struct thread_info, exec_domain));
+ DEFINE(TI_CPU, offsetof(struct thread_info, cpu));
+ DEFINE(TI_CPU_DOMAIN, offsetof(struct thread_info, cpu_domain));
+ DEFINE(TI_CPU_SAVE, offsetof(struct thread_info, cpu_context));
+ DEFINE(TI_USED_CP, offsetof(struct thread_info, used_cp));
+ DEFINE(TI_TP_VALUE, offsetof(struct thread_info, tp_value));
+ DEFINE(TI_FPSTATE, offsetof(struct thread_info, fpstate));
+ DEFINE(TI_VFPSTATE, offsetof(struct thread_info, vfpstate));
+ DEFINE(TI_IWMMXT_STATE, (offsetof(struct thread_info, fpstate)+4)&~7);
+ BLANK();
+#if __LINUX_ARM_ARCH__ >= 6
+ DEFINE(MM_CONTEXT_ID, offsetof(struct mm_struct, context.id));
+ BLANK();
+#endif
+ DEFINE(VMA_VM_MM, offsetof(struct vm_area_struct, vm_mm));
+ DEFINE(VMA_VM_FLAGS, offsetof(struct vm_area_struct, vm_flags));
+ BLANK();
+ DEFINE(VM_EXEC, VM_EXEC);
+ BLANK();
+ DEFINE(PAGE_SZ, PAGE_SIZE);
+ DEFINE(VIRT_OFFSET, PAGE_OFFSET);
+ BLANK();
+ DEFINE(SYS_ERROR0, 0x9f0000);
+ BLANK();
+ DEFINE(SIZEOF_MACHINE_DESC, sizeof(struct machine_desc));
+ return 0;
+}