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 */
11void foo(void);
12
13void foo(void)
14{
15	OFFSET(PT_EBX, pt_regs, bx);
16	OFFSET(PT_ECX, pt_regs, cx);
17	OFFSET(PT_EDX, pt_regs, dx);
18	OFFSET(PT_ESI, pt_regs, si);
19	OFFSET(PT_EDI, pt_regs, di);
20	OFFSET(PT_EBP, pt_regs, bp);
21	OFFSET(PT_EAX, pt_regs, ax);
22	OFFSET(PT_DS,  pt_regs, ds);
23	OFFSET(PT_ES,  pt_regs, es);
24	OFFSET(PT_FS,  pt_regs, fs);
25	OFFSET(PT_GS,  pt_regs, gs);
26	OFFSET(PT_ORIG_EAX, pt_regs, orig_ax);
27	OFFSET(PT_EIP, pt_regs, ip);
28	OFFSET(PT_CS,  pt_regs, cs);
29	OFFSET(PT_EFLAGS, pt_regs, flags);
30	OFFSET(PT_OLDESP, pt_regs, sp);
31	OFFSET(PT_OLDSS,  pt_regs, ss);
32	BLANK();
33
34	OFFSET(saved_context_gdt_desc, saved_context, gdt_desc);
35	BLANK();
36
37	/*
38	 * Offset from the entry stack to task stack stored in TSS. Kernel entry
39	 * happens on the per-cpu entry-stack, and the asm code switches to the
40	 * task-stack pointer stored in x86_tss.sp1, which is a copy of
41	 * task->thread.sp0 where entry code can find it.
42	 */
43	DEFINE(TSS_entry2task_stack,
44	       offsetof(struct cpu_entry_area, tss.x86_tss.sp1) -
45	       offsetofend(struct cpu_entry_area, entry_stack_page.stack));
46
47	BLANK();
48	DEFINE(EFI_svam, offsetof(efi_runtime_services_t, set_virtual_address_map));
49}