arch/x86/kernel/asm-offsets_32.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #ifndef __LINUX_KBUILD_H
   3 # error "Please do not build this file directly, build asm-offsets.c instead"
   4 #endif
   5
   6 #include <linux/efi.h>
   7
   8 #include <asm/ucontext.h>
   9
  10 /* workaround for a warning with -Wmissing-prototypes */
  11 void foo(void);
  12
  13 void foo(void)
  14 {
  15         OFFSET(CPUINFO_x86, cpuinfo_x86, x86);
  16         OFFSET(CPUINFO_x86_vendor, cpuinfo_x86, x86_vendor);
  17         OFFSET(CPUINFO_x86_model, cpuinfo_x86, x86_model);
  18         OFFSET(CPUINFO_x86_stepping, cpuinfo_x86, x86_stepping);
  19         OFFSET(CPUINFO_cpuid_level, cpuinfo_x86, cpuid_level);
  20         OFFSET(CPUINFO_x86_capability, cpuinfo_x86, x86_capability);
  21         OFFSET(CPUINFO_x86_vendor_id, cpuinfo_x86, x86_vendor_id);
  22         BLANK();
  23
  24         OFFSET(PT_EBX, pt_regs, bx);
  25         OFFSET(PT_ECX, pt_regs, cx);
  26         OFFSET(PT_EDX, pt_regs, dx);
  27         OFFSET(PT_ESI, pt_regs, si);
  28         OFFSET(PT_EDI, pt_regs, di);
  29         OFFSET(PT_EBP, pt_regs, bp);
  30         OFFSET(PT_EAX, pt_regs, ax);
  31         OFFSET(PT_DS,  pt_regs, ds);
  32         OFFSET(PT_ES,  pt_regs, es);
  33         OFFSET(PT_FS,  pt_regs, fs);
  34         OFFSET(PT_GS,  pt_regs, gs);
  35         OFFSET(PT_ORIG_EAX, pt_regs, orig_ax);
  36         OFFSET(PT_EIP, pt_regs, ip);
  37         OFFSET(PT_CS,  pt_regs, cs);
  38         OFFSET(PT_EFLAGS, pt_regs, flags);
  39         OFFSET(PT_OLDESP, pt_regs, sp);
  40         OFFSET(PT_OLDSS,  pt_regs, ss);
  41         BLANK();
  42
  43         OFFSET(saved_context_gdt_desc, saved_context, gdt_desc);
  44         BLANK();
  45
  46         /*
  47          * Offset from the entry stack to task stack stored in TSS. Kernel entry
  48          * happens on the per-cpu entry-stack, and the asm code switches to the
  49          * task-stack pointer stored in x86_tss.sp1, which is a copy of
  50          * task->thread.sp0 where entry code can find it.
  51          */
  52         DEFINE(TSS_entry2task_stack,
  53                offsetof(struct cpu_entry_area, tss.x86_tss.sp1) -
  54                offsetofend(struct cpu_entry_area, entry_stack_page.stack));
  55
  56         BLANK();
  57         DEFINE(EFI_svam, offsetof(efi_runtime_services_t, set_virtual_address_map));
  58 }