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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>
86 lines
2.6 KiB
C
86 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
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*/
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#define COMPILE_OFFSETS
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#include <linux/sched.h>
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#include <linux/mm.h>
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#include <linux/interrupt.h>
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#include <linux/thread_info.h>
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#include <linux/kbuild.h>
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#include <linux/ptrace.h>
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#include <asm/hardirq.h>
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#include <asm/page.h>
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int main(void)
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{
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DEFINE(TASK_THREAD, offsetof(struct task_struct, thread));
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DEFINE(TASK_THREAD_INFO, offsetof(struct task_struct, stack));
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BLANK();
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DEFINE(THREAD_CALLEE_REG, offsetof(struct thread_struct, callee_reg));
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DEFINE(THREAD_FAULT_ADDR,
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offsetof(struct thread_struct, fault_address));
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BLANK();
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DEFINE(THREAD_INFO_KSP, offsetof(struct thread_info, ksp));
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DEFINE(THREAD_INFO_FLAGS, offsetof(struct thread_info, flags));
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DEFINE(THREAD_INFO_PREEMPT_COUNT,
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offsetof(struct thread_info, preempt_count));
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BLANK();
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DEFINE(TASK_ACT_MM, offsetof(struct task_struct, active_mm));
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DEFINE(TASK_TGID, offsetof(struct task_struct, tgid));
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DEFINE(TASK_PID, offsetof(struct task_struct, pid));
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DEFINE(TASK_COMM, offsetof(struct task_struct, comm));
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DEFINE(MM_CTXT, offsetof(struct mm_struct, context));
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DEFINE(MM_PGD, offsetof(struct mm_struct, pgd));
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DEFINE(MM_CTXT_ASID, offsetof(mm_context_t, asid));
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BLANK();
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DEFINE(PT_status32, offsetof(struct pt_regs, status32));
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DEFINE(PT_event, offsetof(struct pt_regs, ecr));
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DEFINE(PT_bta, offsetof(struct pt_regs, bta));
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DEFINE(PT_sp, offsetof(struct pt_regs, sp));
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DEFINE(PT_r0, offsetof(struct pt_regs, r0));
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DEFINE(PT_r1, offsetof(struct pt_regs, r1));
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DEFINE(PT_r2, offsetof(struct pt_regs, r2));
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DEFINE(PT_r3, offsetof(struct pt_regs, r3));
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DEFINE(PT_r4, offsetof(struct pt_regs, r4));
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DEFINE(PT_r5, offsetof(struct pt_regs, r5));
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DEFINE(PT_r6, offsetof(struct pt_regs, r6));
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DEFINE(PT_r7, offsetof(struct pt_regs, r7));
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DEFINE(PT_r8, offsetof(struct pt_regs, r8));
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DEFINE(PT_r10, offsetof(struct pt_regs, r10));
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DEFINE(PT_r26, offsetof(struct pt_regs, r26));
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DEFINE(PT_ret, offsetof(struct pt_regs, ret));
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DEFINE(PT_blink, offsetof(struct pt_regs, blink));
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OFFSET(PT_fp, pt_regs, fp);
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DEFINE(PT_lpe, offsetof(struct pt_regs, lp_end));
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DEFINE(PT_lpc, offsetof(struct pt_regs, lp_count));
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#ifdef CONFIG_ISA_ARCV2
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OFFSET(PT_r12, pt_regs, r12);
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OFFSET(PT_r30, pt_regs, r30);
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#endif
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#ifdef CONFIG_ARC_HAS_ACCL_REGS
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OFFSET(PT_r58, pt_regs, r58);
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OFFSET(PT_r59, pt_regs, r59);
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#endif
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#ifdef CONFIG_ARC_DSP_SAVE_RESTORE_REGS
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OFFSET(PT_DSP_CTRL, pt_regs, DSP_CTRL);
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#endif
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DEFINE(SZ_CALLEE_REGS, sizeof(struct callee_regs));
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DEFINE(SZ_PT_REGS, sizeof(struct pt_regs));
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return 0;
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}
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