xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

i386: move kernel

Browse Source 
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Thomas Gleixner
2007-10-11 11:17:01 +02:00
parent f7627e2513
commit 9a163ed8e0
85 changed files with 26 additions and 19 deletions
Download Patch File Download Diff File Expand all files Collapse all files

70
arch/x86/kernel/doublefault_32.c Normal file
View File

@@ -0,0 +1,70 @@
#include <linux/mm.h>
#include <linux/sched.h>
#include <linux/init.h>
#include <linux/init_task.h>
#include <linux/fs.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
#include <asm/processor.h>
#include <asm/desc.h>
#define DOUBLEFAULT_STACKSIZE (1024)
static unsigned long doublefault_stack[DOUBLEFAULT_STACKSIZE];
#define STACK_START (unsigned long)(doublefault_stack+DOUBLEFAULT_STACKSIZE)
#define ptr_ok(x) ((x) > PAGE_OFFSET && (x) < PAGE_OFFSET + MAXMEM)
static void doublefault_fn(void)
{
struct Xgt_desc_struct gdt_desc = {0, 0};
unsigned long gdt, tss;
store_gdt(&gdt_desc);
gdt = gdt_desc.address;
printk(KERN_EMERG "PANIC: double fault, gdt at %08lx [%d bytes]\n", gdt, gdt_desc.size);
if (ptr_ok(gdt)) {
gdt += GDT_ENTRY_TSS << 3;
tss = *(u16 *)(gdt+2);
tss += *(u8 *)(gdt+4) << 16;
tss += *(u8 *)(gdt+7) << 24;
printk(KERN_EMERG "double fault, tss at %08lx\n", tss);
if (ptr_ok(tss)) {
struct i386_hw_tss *t = (struct i386_hw_tss *)tss;
printk(KERN_EMERG "eip = %08lx, esp = %08lx\n", t->eip, t->esp);
printk(KERN_EMERG "eax = %08lx, ebx = %08lx, ecx = %08lx, edx = %08lx\n",
t->eax, t->ebx, t->ecx, t->edx);
printk(KERN_EMERG "esi = %08lx, edi = %08lx\n",
t->esi, t->edi);
}
}
for (;;)
cpu_relax();
}
struct tss_struct doublefault_tss __cacheline_aligned = {
.x86_tss = {
.esp0 = STACK_START,
.ss0 = __KERNEL_DS,
.ldt = 0,
.io_bitmap_base = INVALID_IO_BITMAP_OFFSET,
.eip = (unsigned long) doublefault_fn,
/* 0x2 bit is always set */
.eflags = X86_EFLAGS_SF | 0x2,
.esp = STACK_START,
.es = __USER_DS,
.cs = __KERNEL_CS,
.ss = __KERNEL_DS,
.ds = __USER_DS,
.fs = __KERNEL_PERCPU,
.__cr3 = __pa(swapper_pg_dir)
}
};