From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 11 Oct 2007 09:12:43 +0000 (+0200)
Subject: i386: prepare shared kernel/doublefault.c
X-Git-Tag: firefly_0821_release~26285
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=128ffcdab2e74292ead956f257e10d288a215e06;p=firefly-linux-kernel-4.4.55.git

i386: prepare shared kernel/doublefault.c

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

diff --git a/arch/i386/kernel/Makefile b/arch/i386/kernel/Makefile
index a2a072623c9a..8c739b03eff8 100644
--- a/arch/i386/kernel/Makefile
+++ b/arch/i386/kernel/Makefile
@@ -34,7 +34,7 @@ obj-$(CONFIG_MODULES)		+= module_32.o
 obj-y				+= sysenter_32.o vsyscall_32.o
 obj-$(CONFIG_ACPI_SRAT) 	+= srat_32.o
 obj-$(CONFIG_EFI) 		+= efi_32.o efi_stub_32.o
-obj-$(CONFIG_DOUBLEFAULT) 	+= doublefault.o
+obj-$(CONFIG_DOUBLEFAULT) 	+= doublefault_32.o
 obj-$(CONFIG_VM86)		+= vm86_32.o
 obj-$(CONFIG_EARLY_PRINTK)	+= early_printk.o
 obj-$(CONFIG_HPET_TIMER) 	+= hpet_32.o
diff --git a/arch/i386/kernel/doublefault.c b/arch/i386/kernel/doublefault.c
deleted file mode 100644
index 40978af630e7..000000000000
--- a/arch/i386/kernel/doublefault.c
+++ /dev/null
@@ -1,70 +0,0 @@
-#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)
-	}
-};
diff --git a/arch/i386/kernel/doublefault_32.c b/arch/i386/kernel/doublefault_32.c
new file mode 100644
index 000000000000..40978af630e7
--- /dev/null
+++ b/arch/i386/kernel/doublefault_32.c
@@ -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)
+	}
+};