1 /* 2 * Copyright (C) 1995-2003 Russell King 3 * 2001-2002 Keith Owens 4 * 5 * Generate definitions needed by assembly language modules. 6 * This code generates raw asm output which is post-processed to extract 7 * and format the required data. 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License version 2 as 11 * published by the Free Software Foundation. 12 */ 13 #include <linux/sched.h> 14 #include <linux/mm.h> 15 #include <asm/mach/arch.h> 16 #include <asm/thread_info.h> 17 #include <asm/memory.h> 18 19 /* 20 * Make sure that the compiler and target are compatible. 21 */ 22 #if defined(__APCS_26__) 23 #error Sorry, your compiler targets APCS-26 but this kernel requires APCS-32 24 #endif 25 /* 26 * GCC 2.95.1, 2.95.2: ignores register clobber list in asm(). 27 * GCC 3.0, 3.1: general bad code generation. 28 * GCC 3.2.0: incorrect function argument offset calculation. 29 * GCC 3.2.x: miscompiles NEW_AUX_ENT in fs/binfmt_elf.c 30 * (http://gcc.gnu.org/PR8896) and incorrect structure 31 * initialisation in fs/jffs2/erase.c 32 */ 33 #if __GNUC__ < 2 || \ 34 (__GNUC__ == 2 && __GNUC_MINOR__ < 95) || \ 35 (__GNUC__ == 2 && __GNUC_MINOR__ == 95 && __GNUC_PATCHLEVEL__ != 0 && \ 36 __GNUC_PATCHLEVEL__ < 3) || \ 37 (__GNUC__ == 3 && __GNUC_MINOR__ < 3) 38 #error Your compiler is too buggy; it is known to miscompile kernels. 39 #error Known good compilers: 2.95.3, 2.95.4, 2.96, 3.3 40 #endif 41 42 /* Use marker if you need to separate the values later */ 43 44 #define DEFINE(sym, val) \ 45 asm volatile("\n->" #sym " %0 " #val : : "i" (val)) 46 47 #define BLANK() asm volatile("\n->" : : ) 48 49 int main(void) 50 { 51 DEFINE(TSK_ACTIVE_MM, offsetof(struct task_struct, active_mm)); 52 BLANK(); 53 DEFINE(TI_FLAGS, offsetof(struct thread_info, flags)); 54 DEFINE(TI_PREEMPT, offsetof(struct thread_info, preempt_count)); 55 DEFINE(TI_ADDR_LIMIT, offsetof(struct thread_info, addr_limit)); 56 DEFINE(TI_TASK, offsetof(struct thread_info, task)); 57 DEFINE(TI_EXEC_DOMAIN, offsetof(struct thread_info, exec_domain)); 58 DEFINE(TI_CPU, offsetof(struct thread_info, cpu)); 59 DEFINE(TI_CPU_DOMAIN, offsetof(struct thread_info, cpu_domain)); 60 DEFINE(TI_CPU_SAVE, offsetof(struct thread_info, cpu_context)); 61 DEFINE(TI_USED_CP, offsetof(struct thread_info, used_cp)); 62 DEFINE(TI_TP_VALUE, offsetof(struct thread_info, tp_value)); 63 DEFINE(TI_FPSTATE, offsetof(struct thread_info, fpstate)); 64 DEFINE(TI_VFPSTATE, offsetof(struct thread_info, vfpstate)); 65 DEFINE(TI_IWMMXT_STATE, (offsetof(struct thread_info, fpstate)+4)&~7); 66 BLANK(); 67 #if __LINUX_ARM_ARCH__ >= 6 68 DEFINE(MM_CONTEXT_ID, offsetof(struct mm_struct, context.id)); 69 BLANK(); 70 #endif 71 DEFINE(VMA_VM_MM, offsetof(struct vm_area_struct, vm_mm)); 72 DEFINE(VMA_VM_FLAGS, offsetof(struct vm_area_struct, vm_flags)); 73 BLANK(); 74 DEFINE(VM_EXEC, VM_EXEC); 75 BLANK(); 76 DEFINE(PAGE_SZ, PAGE_SIZE); 77 DEFINE(VIRT_OFFSET, PAGE_OFFSET); 78 BLANK(); 79 DEFINE(SYS_ERROR0, 0x9f0000); 80 BLANK(); 81 DEFINE(SIZEOF_MACHINE_DESC, sizeof(struct machine_desc)); 82 return 0; 83 } 84