You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
101 lines
3.3 KiB
101 lines
3.3 KiB
#ifndef _I386_KEXEC_H
|
|
#define _I386_KEXEC_H
|
|
|
|
#define PA_CONTROL_PAGE 0
|
|
#define VA_CONTROL_PAGE 1
|
|
#define PA_PGD 2
|
|
#define VA_PGD 3
|
|
#define PA_PTE_0 4
|
|
#define VA_PTE_0 5
|
|
#define PA_PTE_1 6
|
|
#define VA_PTE_1 7
|
|
#ifdef CONFIG_X86_PAE
|
|
#define PA_PMD_0 8
|
|
#define VA_PMD_0 9
|
|
#define PA_PMD_1 10
|
|
#define VA_PMD_1 11
|
|
#define PAGES_NR 12
|
|
#else
|
|
#define PAGES_NR 8
|
|
#endif
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#include <asm/ptrace.h>
|
|
#include <asm/string.h>
|
|
|
|
/*
|
|
* KEXEC_SOURCE_MEMORY_LIMIT maximum page get_free_page can return.
|
|
* I.e. Maximum page that is mapped directly into kernel memory,
|
|
* and kmap is not required.
|
|
*/
|
|
|
|
/* Maximum physical address we can use pages from */
|
|
#define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
|
|
/* Maximum address we can reach in physical address mode */
|
|
#define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
|
|
/* Maximum address we can use for the control code buffer */
|
|
#define KEXEC_CONTROL_MEMORY_LIMIT TASK_SIZE
|
|
|
|
#define KEXEC_CONTROL_CODE_SIZE 4096
|
|
|
|
/* The native architecture */
|
|
#define KEXEC_ARCH KEXEC_ARCH_386
|
|
|
|
/* We can also handle crash dumps from 64 bit kernel. */
|
|
#define vmcore_elf_check_arch_cross(x) ((x)->e_machine == EM_X86_64)
|
|
|
|
#define MAX_NOTE_BYTES 1024
|
|
|
|
/* CPU does not save ss and esp on stack if execution is already
|
|
* running in kernel mode at the time of NMI occurrence. This code
|
|
* fixes it.
|
|
*/
|
|
static inline void crash_fixup_ss_esp(struct pt_regs *newregs,
|
|
struct pt_regs *oldregs)
|
|
{
|
|
memcpy(newregs, oldregs, sizeof(*newregs));
|
|
newregs->esp = (unsigned long)&(oldregs->esp);
|
|
__asm__ __volatile__(
|
|
"xorl %%eax, %%eax\n\t"
|
|
"movw %%ss, %%ax\n\t"
|
|
:"=a"(newregs->xss));
|
|
}
|
|
|
|
/*
|
|
* This function is responsible for capturing register states if coming
|
|
* via panic otherwise just fix up the ss and esp if coming via kernel
|
|
* mode exception.
|
|
*/
|
|
static inline void crash_setup_regs(struct pt_regs *newregs,
|
|
struct pt_regs *oldregs)
|
|
{
|
|
if (oldregs)
|
|
crash_fixup_ss_esp(newregs, oldregs);
|
|
else {
|
|
__asm__ __volatile__("movl %%ebx,%0" : "=m"(newregs->ebx));
|
|
__asm__ __volatile__("movl %%ecx,%0" : "=m"(newregs->ecx));
|
|
__asm__ __volatile__("movl %%edx,%0" : "=m"(newregs->edx));
|
|
__asm__ __volatile__("movl %%esi,%0" : "=m"(newregs->esi));
|
|
__asm__ __volatile__("movl %%edi,%0" : "=m"(newregs->edi));
|
|
__asm__ __volatile__("movl %%ebp,%0" : "=m"(newregs->ebp));
|
|
__asm__ __volatile__("movl %%eax,%0" : "=m"(newregs->eax));
|
|
__asm__ __volatile__("movl %%esp,%0" : "=m"(newregs->esp));
|
|
__asm__ __volatile__("movw %%ss, %%ax;" :"=a"(newregs->xss));
|
|
__asm__ __volatile__("movw %%cs, %%ax;" :"=a"(newregs->xcs));
|
|
__asm__ __volatile__("movw %%ds, %%ax;" :"=a"(newregs->xds));
|
|
__asm__ __volatile__("movw %%es, %%ax;" :"=a"(newregs->xes));
|
|
__asm__ __volatile__("pushfl; popl %0" :"=m"(newregs->eflags));
|
|
|
|
newregs->eip = (unsigned long)current_text_addr();
|
|
}
|
|
}
|
|
asmlinkage NORET_TYPE void
|
|
relocate_kernel(unsigned long indirection_page,
|
|
unsigned long control_page,
|
|
unsigned long start_address,
|
|
unsigned int has_pae) ATTRIB_NORET;
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#endif /* _I386_KEXEC_H */
|
|
|