From 128ffcdab2e74292ead956f257e10d288a215e06 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Thu, 11 Oct 2007 11:12:43 +0200 Subject: i386: prepare shared kernel/doublefault.c Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar --- arch/i386/kernel/Makefile | 2 +- arch/i386/kernel/doublefault.c | 70 --------------------------------------- arch/i386/kernel/doublefault_32.c | 70 +++++++++++++++++++++++++++++++++++++++ 3 files changed, 71 insertions(+), 71 deletions(-) delete mode 100644 arch/i386/kernel/doublefault.c create mode 100644 arch/i386/kernel/doublefault_32.c (limited to 'arch/i386/kernel') diff --git a/arch/i386/kernel/Makefile b/arch/i386/kernel/Makefile index a2a0726..8c739b0 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 40978af..0000000 --- a/arch/i386/kernel/doublefault.c +++ /dev/null @@ -1,70 +0,0 @@ -#include -#include -#include -#include -#include - -#include -#include -#include -#include - -#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 0000000..40978af --- /dev/null +++ b/arch/i386/kernel/doublefault_32.c @@ -0,0 +1,70 @@ +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +#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) + } +}; -- cgit v1.1