mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 14:43:58 +08:00
a6b744f3ce
x86_tss.sp0 will be used to point to the entry stack later to use it as a trampoline stack for other kernel entry points besides SYSENTER. So store the real task stack pointer in x86_tss.sp1, which is otherwise unused by the hardware, as Linux doesn't make use of Ring 1. Signed-off-by: Joerg Roedel <jroedel@suse.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Pavel Machek <pavel@ucw.cz> Cc: "H . Peter Anvin" <hpa@zytor.com> Cc: linux-mm@kvack.org Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andy Lutomirski <luto@kernel.org> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Brian Gerst <brgerst@gmail.com> Cc: David Laight <David.Laight@aculab.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: Eduardo Valentin <eduval@amazon.com> Cc: Greg KH <gregkh@linuxfoundation.org> Cc: Will Deacon <will.deacon@arm.com> Cc: aliguori@amazon.com Cc: daniel.gruss@iaik.tugraz.at Cc: hughd@google.com Cc: keescook@google.com Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Waiman Long <llong@redhat.com> Cc: "David H . Gutteridge" <dhgutteridge@sympatico.ca> Cc: joro@8bytes.org Link: https://lkml.kernel.org/r/1531906876-13451-4-git-send-email-joro@8bytes.org
68 lines
2.0 KiB
C
68 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#ifndef __LINUX_KBUILD_H
|
|
# error "Please do not build this file directly, build asm-offsets.c instead"
|
|
#endif
|
|
|
|
#include <asm/ucontext.h>
|
|
|
|
#define __SYSCALL_I386(nr, sym, qual) [nr] = 1,
|
|
static char syscalls[] = {
|
|
#include <asm/syscalls_32.h>
|
|
};
|
|
|
|
/* workaround for a warning with -Wmissing-prototypes */
|
|
void foo(void);
|
|
|
|
void foo(void)
|
|
{
|
|
OFFSET(CPUINFO_x86, cpuinfo_x86, x86);
|
|
OFFSET(CPUINFO_x86_vendor, cpuinfo_x86, x86_vendor);
|
|
OFFSET(CPUINFO_x86_model, cpuinfo_x86, x86_model);
|
|
OFFSET(CPUINFO_x86_stepping, cpuinfo_x86, x86_stepping);
|
|
OFFSET(CPUINFO_cpuid_level, cpuinfo_x86, cpuid_level);
|
|
OFFSET(CPUINFO_x86_capability, cpuinfo_x86, x86_capability);
|
|
OFFSET(CPUINFO_x86_vendor_id, cpuinfo_x86, x86_vendor_id);
|
|
BLANK();
|
|
|
|
OFFSET(PT_EBX, pt_regs, bx);
|
|
OFFSET(PT_ECX, pt_regs, cx);
|
|
OFFSET(PT_EDX, pt_regs, dx);
|
|
OFFSET(PT_ESI, pt_regs, si);
|
|
OFFSET(PT_EDI, pt_regs, di);
|
|
OFFSET(PT_EBP, pt_regs, bp);
|
|
OFFSET(PT_EAX, pt_regs, ax);
|
|
OFFSET(PT_DS, pt_regs, ds);
|
|
OFFSET(PT_ES, pt_regs, es);
|
|
OFFSET(PT_FS, pt_regs, fs);
|
|
OFFSET(PT_GS, pt_regs, gs);
|
|
OFFSET(PT_ORIG_EAX, pt_regs, orig_ax);
|
|
OFFSET(PT_EIP, pt_regs, ip);
|
|
OFFSET(PT_CS, pt_regs, cs);
|
|
OFFSET(PT_EFLAGS, pt_regs, flags);
|
|
OFFSET(PT_OLDESP, pt_regs, sp);
|
|
OFFSET(PT_OLDSS, pt_regs, ss);
|
|
BLANK();
|
|
|
|
OFFSET(saved_context_gdt_desc, saved_context, gdt_desc);
|
|
BLANK();
|
|
|
|
/*
|
|
* Offset from the entry stack to task stack stored in TSS. Kernel entry
|
|
* happens on the per-cpu entry-stack, and the asm code switches to the
|
|
* task-stack pointer stored in x86_tss.sp1, which is a copy of
|
|
* task->thread.sp0 where entry code can find it.
|
|
*/
|
|
DEFINE(TSS_entry2task_stack,
|
|
offsetof(struct cpu_entry_area, tss.x86_tss.sp1) -
|
|
offsetofend(struct cpu_entry_area, entry_stack_page.stack));
|
|
|
|
#ifdef CONFIG_STACKPROTECTOR
|
|
BLANK();
|
|
OFFSET(stack_canary_offset, stack_canary, canary);
|
|
#endif
|
|
|
|
BLANK();
|
|
DEFINE(__NR_syscall_max, sizeof(syscalls) - 1);
|
|
DEFINE(NR_syscalls, sizeof(syscalls));
|
|
}
|