arch/x86/kernel/asm-offsets.c

   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 #include "../kvm/vmx/vmx.h"
  22
  23 #ifdef CONFIG_XEN
  24 #include <xen/interface/xen.h>
  25 #endif
  26
  27 #ifdef CONFIG_X86_32
  28 # include "asm-offsets_32.c"
  29 #else
  30 # include "asm-offsets_64.c"
  31 #endif
  32
  33 static void __used common(void)
  34 {
  35         BLANK();
  36         OFFSET(TASK_threadsp, task_struct, thread.sp);
  37 #ifdef CONFIG_STACKPROTECTOR
  38         OFFSET(TASK_stack_canary, task_struct, stack_canary);
  39 #endif
  40
  41         BLANK();
  42         OFFSET(crypto_tfm_ctx_offset, crypto_tfm, __crt_ctx);
  43
  44         BLANK();
  45         OFFSET(pbe_address, pbe, address);
  46         OFFSET(pbe_orig_address, pbe, orig_address);
  47         OFFSET(pbe_next, pbe, next);
  48
  49 #if defined(CONFIG_X86_32) || defined(CONFIG_IA32_EMULATION)
  50         BLANK();
  51         OFFSET(IA32_SIGCONTEXT_ax, sigcontext_32, ax);
  52         OFFSET(IA32_SIGCONTEXT_bx, sigcontext_32, bx);
  53         OFFSET(IA32_SIGCONTEXT_cx, sigcontext_32, cx);
  54         OFFSET(IA32_SIGCONTEXT_dx, sigcontext_32, dx);
  55         OFFSET(IA32_SIGCONTEXT_si, sigcontext_32, si);
  56         OFFSET(IA32_SIGCONTEXT_di, sigcontext_32, di);
  57         OFFSET(IA32_SIGCONTEXT_bp, sigcontext_32, bp);
  58         OFFSET(IA32_SIGCONTEXT_sp, sigcontext_32, sp);
  59         OFFSET(IA32_SIGCONTEXT_ip, sigcontext_32, ip);
  60
  61         BLANK();
  62         OFFSET(IA32_RT_SIGFRAME_sigcontext, rt_sigframe_ia32, uc.uc_mcontext);
  63 #endif
  64
  65 #ifdef CONFIG_XEN
  66         BLANK();
  67         OFFSET(XEN_vcpu_info_mask, vcpu_info, evtchn_upcall_mask);
  68         OFFSET(XEN_vcpu_info_pending, vcpu_info, evtchn_upcall_pending);
  69         OFFSET(XEN_vcpu_info_arch_cr2, vcpu_info, arch.cr2);
  70 #endif
  71
  72         BLANK();
  73         OFFSET(BP_scratch, boot_params, scratch);
  74         OFFSET(BP_secure_boot, boot_params, secure_boot);
  75         OFFSET(BP_loadflags, boot_params, hdr.loadflags);
  76         OFFSET(BP_hardware_subarch, boot_params, hdr.hardware_subarch);
  77         OFFSET(BP_version, boot_params, hdr.version);
  78         OFFSET(BP_kernel_alignment, boot_params, hdr.kernel_alignment);
  79         OFFSET(BP_init_size, boot_params, hdr.init_size);
  80         OFFSET(BP_pref_address, boot_params, hdr.pref_address);
  81
  82         BLANK();
  83         DEFINE(PTREGS_SIZE, sizeof(struct pt_regs));
  84
  85         /* TLB state for the entry code */
  86         OFFSET(TLB_STATE_user_pcid_flush_mask, tlb_state, user_pcid_flush_mask);
  87
  88         /* Layout info for cpu_entry_area */
  89         OFFSET(CPU_ENTRY_AREA_entry_stack, cpu_entry_area, entry_stack_page);
  90         DEFINE(SIZEOF_entry_stack, sizeof(struct entry_stack));
  91         DEFINE(MASK_entry_stack, (~(sizeof(struct entry_stack) - 1)));
  92
  93         /* Offset for fields in tss_struct */
  94         OFFSET(TSS_sp0, tss_struct, x86_tss.sp0);
  95         OFFSET(TSS_sp1, tss_struct, x86_tss.sp1);
  96         OFFSET(TSS_sp2, tss_struct, x86_tss.sp2);
  97
  98         if (IS_ENABLED(CONFIG_KVM_INTEL)) {
  99                 BLANK();
 100                 OFFSET(VMX_spec_ctrl, vcpu_vmx, spec_ctrl);
 101         }
 102 }