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35561bab76
The include/generated/asm-offsets.h is generated in Kbuild during compiling from arch/SRCARCH/kernel/asm-offsets.c. When we want to generate another similar offset header file, circular dependency can happen. For example, we want to generate a offset file include/generated/test.h, which is included in include/sched/sched.h. If we generate asm-offsets.h first, it will fail, as include/sched/sched.h is included in asm-offsets.c and include/generated/test.h doesn't exist; If we generate test.h first, it can't success neither, as include/generated/asm-offsets.h is included by it. In x86_64, the macro COMPILE_OFFSETS is used to avoid such circular dependency. We can generate asm-offsets.h first, and if the COMPILE_OFFSETS is defined, we don't include the "generated/test.h". And we define the macro COMPILE_OFFSETS for all the asm-offsets.c for this purpose. Signed-off-by: Menglong Dong <dongml2@chinatelecom.cn> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
93 lines
3.1 KiB
C
93 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 1996 David S. Miller
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* Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003 Ralf Baechle
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* Copyright (C) 1999, 2000 Silicon Graphics, Inc.
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* Kevin Kissell, kevink@mips.com and Carsten Langgaard, carstenl@mips.com
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* Copyright (C) 2000 MIPS Technologies, Inc.
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*
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* Copyright (c) 2010-2012, The Linux Foundation. All rights reserved.
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*/
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#define COMPILE_OFFSETS
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#include <linux/compat.h>
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#include <linux/types.h>
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#include <linux/sched.h>
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#include <linux/interrupt.h>
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#include <linux/kbuild.h>
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#include <asm/ptrace.h>
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#include <asm/processor.h>
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/* This file is used to produce asm/linkerscript constants from header
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files typically used in c. Specifically, it generates asm-offsets.h */
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int main(void)
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{
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COMMENT("This is a comment.");
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/* might get these from somewhere else. */
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DEFINE(_PAGE_SIZE, PAGE_SIZE);
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DEFINE(_PAGE_SHIFT, PAGE_SHIFT);
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BLANK();
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COMMENT("Hexagon pt_regs definitions");
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OFFSET(_PT_SYSCALL_NR, pt_regs, syscall_nr);
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OFFSET(_PT_GPUGP, pt_regs, gpugp);
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OFFSET(_PT_CS1CS0, pt_regs, cs1cs0);
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OFFSET(_PT_R3130, pt_regs, r3130);
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OFFSET(_PT_R2928, pt_regs, r2928);
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OFFSET(_PT_R2726, pt_regs, r2726);
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OFFSET(_PT_R2524, pt_regs, r2524);
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OFFSET(_PT_R2322, pt_regs, r2322);
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OFFSET(_PT_R2120, pt_regs, r2120);
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OFFSET(_PT_R1918, pt_regs, r1918);
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OFFSET(_PT_R1716, pt_regs, r1716);
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OFFSET(_PT_R1514, pt_regs, r1514);
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OFFSET(_PT_R1312, pt_regs, r1312);
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OFFSET(_PT_R1110, pt_regs, r1110);
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OFFSET(_PT_R0908, pt_regs, r0908);
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OFFSET(_PT_R0706, pt_regs, r0706);
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OFFSET(_PT_R0504, pt_regs, r0504);
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OFFSET(_PT_R0302, pt_regs, r0302);
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OFFSET(_PT_R0100, pt_regs, r0100);
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OFFSET(_PT_LC0SA0, pt_regs, lc0sa0);
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OFFSET(_PT_LC1SA1, pt_regs, lc1sa1);
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OFFSET(_PT_M1M0, pt_regs, m1m0);
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OFFSET(_PT_PREDSUSR, pt_regs, predsusr);
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OFFSET(_PT_EVREC, pt_regs, hvmer);
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OFFSET(_PT_ER_VMEL, pt_regs, hvmer.vmel);
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OFFSET(_PT_ER_VMEST, pt_regs, hvmer.vmest);
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OFFSET(_PT_ER_VMPSP, pt_regs, hvmer.vmpsp);
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OFFSET(_PT_ER_VMBADVA, pt_regs, hvmer.vmbadva);
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DEFINE(_PT_REGS_SIZE, sizeof(struct pt_regs));
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BLANK();
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COMMENT("Hexagon thread_info definitions");
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OFFSET(_THREAD_INFO_FLAGS, thread_info, flags);
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OFFSET(_THREAD_INFO_PT_REGS, thread_info, regs);
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OFFSET(_THREAD_INFO_SP, thread_info, sp);
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DEFINE(_THREAD_SIZE, THREAD_SIZE);
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BLANK();
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COMMENT("Hexagon hexagon_switch_stack definitions");
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OFFSET(_SWITCH_R1716, hexagon_switch_stack, r1716);
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OFFSET(_SWITCH_R1918, hexagon_switch_stack, r1918);
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OFFSET(_SWITCH_R2120, hexagon_switch_stack, r2120);
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OFFSET(_SWITCH_R2322, hexagon_switch_stack, r2322);
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OFFSET(_SWITCH_R2524, hexagon_switch_stack, r2524);
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OFFSET(_SWITCH_R2726, hexagon_switch_stack, r2726);
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OFFSET(_SWITCH_FP, hexagon_switch_stack, fp);
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OFFSET(_SWITCH_LR, hexagon_switch_stack, lr);
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DEFINE(_SWITCH_STACK_SIZE, sizeof(struct hexagon_switch_stack));
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BLANK();
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COMMENT("Hexagon task_struct definitions");
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OFFSET(_TASK_THREAD_INFO, task_struct, stack);
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OFFSET(_TASK_STRUCT_THREAD, task_struct, thread);
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COMMENT("Hexagon thread_struct definitions");
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OFFSET(_THREAD_STRUCT_SWITCH_SP, thread_struct, switch_sp);
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return 0;
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}
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