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Linux/arch/x86/kernel/asm-offsets.c

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  1 // SPDX-License-Identifier: GPL-2.0
  2 /*
  3  * Generate definitions needed by assembly language modules.
  4  * This code generates raw asm output which is post-processed to extract
  5  * and format the required data.
  6  */
  7 #define COMPILE_OFFSETS
  8 
  9 #include <linux/crypto.h>
 10 #include <linux/sched.h>
 11 #include <linux/stddef.h>
 12 #include <linux/hardirq.h>
 13 #include <linux/suspend.h>
 14 #include <linux/kbuild.h>
 15 #include <asm/processor.h>
 16 #include <asm/thread_info.h>
 17 #include <asm/sigframe.h>
 18 #include <asm/bootparam.h>
 19 #include <asm/suspend.h>
 20 #include <asm/tlbflush.h>
 21 
 22 #ifdef CONFIG_XEN
 23 #include <xen/interface/xen.h>
 24 #endif
 25 
 26 #ifdef CONFIG_X86_32
 27 # include "asm-offsets_32.c"
 28 #else
 29 # include "asm-offsets_64.c"
 30 #endif
 31 
 32 static void __used common(void)
 33 {
 34         BLANK();
 35         OFFSET(TASK_threadsp, task_struct, thread.sp);
 36 #ifdef CONFIG_STACKPROTECTOR
 37         OFFSET(TASK_stack_canary, task_struct, stack_canary);
 38 #endif
 39 
 40         BLANK();
 41         OFFSET(TASK_TI_flags, task_struct, thread_info.flags);
 42         OFFSET(TASK_addr_limit, task_struct, thread.addr_limit);
 43 
 44         BLANK();
 45         OFFSET(crypto_tfm_ctx_offset, crypto_tfm, __crt_ctx);
 46 
 47         BLANK();
 48         OFFSET(pbe_address, pbe, address);
 49         OFFSET(pbe_orig_address, pbe, orig_address);
 50         OFFSET(pbe_next, pbe, next);
 51 
 52 #if defined(CONFIG_X86_32) || defined(CONFIG_IA32_EMULATION)
 53         BLANK();
 54         OFFSET(IA32_SIGCONTEXT_ax, sigcontext_32, ax);
 55         OFFSET(IA32_SIGCONTEXT_bx, sigcontext_32, bx);
 56         OFFSET(IA32_SIGCONTEXT_cx, sigcontext_32, cx);
 57         OFFSET(IA32_SIGCONTEXT_dx, sigcontext_32, dx);
 58         OFFSET(IA32_SIGCONTEXT_si, sigcontext_32, si);
 59         OFFSET(IA32_SIGCONTEXT_di, sigcontext_32, di);
 60         OFFSET(IA32_SIGCONTEXT_bp, sigcontext_32, bp);
 61         OFFSET(IA32_SIGCONTEXT_sp, sigcontext_32, sp);
 62         OFFSET(IA32_SIGCONTEXT_ip, sigcontext_32, ip);
 63 
 64         BLANK();
 65         OFFSET(IA32_RT_SIGFRAME_sigcontext, rt_sigframe_ia32, uc.uc_mcontext);
 66 #endif
 67 
 68 #ifdef CONFIG_PARAVIRT_XXL
 69         BLANK();
 70         OFFSET(PV_IRQ_irq_disable, paravirt_patch_template, irq.irq_disable);
 71         OFFSET(PV_IRQ_irq_enable, paravirt_patch_template, irq.irq_enable);
 72         OFFSET(PV_CPU_iret, paravirt_patch_template, cpu.iret);
 73         OFFSET(PV_MMU_read_cr2, paravirt_patch_template, mmu.read_cr2);
 74 #endif
 75 
 76 #ifdef CONFIG_XEN
 77         BLANK();
 78         OFFSET(XEN_vcpu_info_mask, vcpu_info, evtchn_upcall_mask);
 79         OFFSET(XEN_vcpu_info_pending, vcpu_info, evtchn_upcall_pending);
 80 #endif
 81 
 82         BLANK();
 83         OFFSET(BP_scratch, boot_params, scratch);
 84         OFFSET(BP_secure_boot, boot_params, secure_boot);
 85         OFFSET(BP_loadflags, boot_params, hdr.loadflags);
 86         OFFSET(BP_hardware_subarch, boot_params, hdr.hardware_subarch);
 87         OFFSET(BP_version, boot_params, hdr.version);
 88         OFFSET(BP_kernel_alignment, boot_params, hdr.kernel_alignment);
 89         OFFSET(BP_init_size, boot_params, hdr.init_size);
 90         OFFSET(BP_pref_address, boot_params, hdr.pref_address);
 91         OFFSET(BP_code32_start, boot_params, hdr.code32_start);
 92 
 93         BLANK();
 94         DEFINE(PTREGS_SIZE, sizeof(struct pt_regs));
 95 
 96         /* TLB state for the entry code */
 97         OFFSET(TLB_STATE_user_pcid_flush_mask, tlb_state, user_pcid_flush_mask);
 98 
 99         /* Layout info for cpu_entry_area */
100         OFFSET(CPU_ENTRY_AREA_entry_stack, cpu_entry_area, entry_stack_page);
101         DEFINE(SIZEOF_entry_stack, sizeof(struct entry_stack));
102         DEFINE(MASK_entry_stack, (~(sizeof(struct entry_stack) - 1)));
103 
104         /* Offset for fields in tss_struct */
105         OFFSET(TSS_sp0, tss_struct, x86_tss.sp0);
106         OFFSET(TSS_sp1, tss_struct, x86_tss.sp1);
107         OFFSET(TSS_sp2, tss_struct, x86_tss.sp2);
108 }
109 

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