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 <asm/ucontext.h>
   7
   8 #define __SYSCALL_I386(nr, sym, qual) [nr] = 1,
   9 static char syscalls[] = {
  10 #include <asm/syscalls_32.h>
  11 };
  12
  13 /* workaround for a warning with -Wmissing-prototypes */
  14 void foo(void);
  15
  16 void foo(void)
  17 {
  18         OFFSET(CPUINFO_x86, cpuinfo_x86, x86);
  19         OFFSET(CPUINFO_x86_vendor, cpuinfo_x86, x86_vendor);
  20         OFFSET(CPUINFO_x86_model, cpuinfo_x86, x86_model);
  21         OFFSET(CPUINFO_x86_stepping, cpuinfo_x86, x86_stepping);
  22         OFFSET(CPUINFO_cpuid_level, cpuinfo_x86, cpuid_level);
  23         OFFSET(CPUINFO_x86_capability, cpuinfo_x86, x86_capability);
  24         OFFSET(CPUINFO_x86_vendor_id, cpuinfo_x86, x86_vendor_id);
  25         BLANK();
  26
  27         OFFSET(PT_EBX, pt_regs, bx);
  28         OFFSET(PT_ECX, pt_regs, cx);
  29         OFFSET(PT_EDX, pt_regs, dx);
  30         OFFSET(PT_ESI, pt_regs, si);
  31         OFFSET(PT_EDI, pt_regs, di);
  32         OFFSET(PT_EBP, pt_regs, bp);
  33         OFFSET(PT_EAX, pt_regs, ax);
  34         OFFSET(PT_DS,  pt_regs, ds);
  35         OFFSET(PT_ES,  pt_regs, es);
  36         OFFSET(PT_FS,  pt_regs, fs);
  37         OFFSET(PT_GS,  pt_regs, gs);
  38         OFFSET(PT_ORIG_EAX, pt_regs, orig_ax);
  39         OFFSET(PT_EIP, pt_regs, ip);
  40         OFFSET(PT_CS,  pt_regs, cs);
  41         OFFSET(PT_EFLAGS, pt_regs, flags);
  42         OFFSET(PT_OLDESP, pt_regs, sp);
  43         OFFSET(PT_OLDSS,  pt_regs, ss);
  44         BLANK();
  45
  46         OFFSET(saved_context_gdt_desc, saved_context, gdt_desc);
  47         BLANK();
  48
  49         /*
  50          * Offset from the entry stack to task stack stored in TSS. Kernel entry
  51          * happens on the per-cpu entry-stack, and the asm code switches to the
  52          * task-stack pointer stored in x86_tss.sp1, which is a copy of
  53          * task->thread.sp0 where entry code can find it.
  54          */
  55         DEFINE(TSS_entry2task_stack,
  56                offsetof(struct cpu_entry_area, tss.x86_tss.sp1) -
  57                offsetofend(struct cpu_entry_area, entry_stack_page.stack));
  58
  59 #ifdef CONFIG_STACKPROTECTOR
  60         BLANK();
  61         OFFSET(stack_canary_offset, stack_canary, canary);
  62 #endif
  63
  64         BLANK();
  65         DEFINE(__NR_syscall_max, sizeof(syscalls) - 1);
  66         DEFINE(NR_syscalls, sizeof(syscalls));
  67 }