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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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8e5b2a3c5a
swsusp_arch_suspend() is callable non-leaf function which doesn't honor CONFIG_FRAME_POINTER, which can result in bad stack traces. Also it's not annotated as ELF callable function which can confuse tooling. Create a stack frame for it when CONFIG_FRAME_POINTER is enabled and give it proper ELF function annotation. Also in this patch introduces the restore_registers() symbol and gives it ELF function annotation, thus to prepare for later register restore. Analogous changes were made for 64bit before in commitef0f3ed5a4(x86/asm/power: Create stack frames in hibernate_asm_64.S) and commit4ce827b4cc(x86/power/64: Fix hibernation return address corruption). Signed-off-by: Zhimin Gu <kookoo.gu@intel.com> Signed-off-by: Chen Yu <yu.c.chen@intel.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
40 lines
938 B
C
40 lines
938 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright 2001-2002 Pavel Machek <pavel@suse.cz>
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* Based on code
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* Copyright 2001 Patrick Mochel <mochel@osdl.org>
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*/
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#ifndef _ASM_X86_SUSPEND_32_H
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#define _ASM_X86_SUSPEND_32_H
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#include <asm/desc.h>
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#include <asm/fpu/api.h>
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/* image of the saved processor state */
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struct saved_context {
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/*
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* On x86_32, all segment registers, with the possible exception of
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* gs, are saved at kernel entry in pt_regs.
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*/
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#ifdef CONFIG_X86_32_LAZY_GS
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u16 gs;
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#endif
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unsigned long cr0, cr2, cr3, cr4;
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u64 misc_enable;
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bool misc_enable_saved;
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struct saved_msrs saved_msrs;
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struct desc_ptr gdt_desc;
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struct desc_ptr idt;
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u16 ldt;
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u16 tss;
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unsigned long tr;
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unsigned long safety;
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unsigned long return_address;
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} __attribute__((packed));
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/* routines for saving/restoring kernel state */
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extern char core_restore_code[];
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extern char restore_registers[];
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#endif /* _ASM_X86_SUSPEND_32_H */
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