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| author | Andy Lutomirski <luto@kernel.org> | 2019-11-21 09:42:30 -0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2019-11-26 21:53:34 +0100 |
| commit | e99b6f46ee5c127d39d2f3a2682fdeef10386316 (patch) | |
| tree | eef5758f1216ba62f15e5f4a00f213840f35f08d /arch/x86/kernel/doublefault.c | |
| parent | 93efbde2c331004d8053f04b4bf0ca3e630b474a (diff) | |
| download | lwn-e99b6f46ee5c127d39d2f3a2682fdeef10386316.tar.gz lwn-e99b6f46ee5c127d39d2f3a2682fdeef10386316.zip | |
x86/doublefault/32: Rename doublefault.c to doublefault_32.c
doublefault.c now only contains 32-bit code. Rename it to
doublefault_32.c.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel/doublefault.c')
| -rw-r--r-- | arch/x86/kernel/doublefault.c | 75 |
1 files changed, 0 insertions, 75 deletions
diff --git a/arch/x86/kernel/doublefault.c b/arch/x86/kernel/doublefault.c deleted file mode 100644 index 0b3c616b61a3..000000000000 --- a/arch/x86/kernel/doublefault.c +++ /dev/null @@ -1,75 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -#include <linux/mm.h> -#include <linux/sched.h> -#include <linux/sched/debug.h> -#include <linux/init_task.h> -#include <linux/fs.h> - -#include <linux/uaccess.h> -#include <asm/pgtable.h> -#include <asm/processor.h> -#include <asm/desc.h> - -#ifdef CONFIG_X86_32 - -#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 desc_ptr gdt_desc = {0, 0}; - unsigned long gdt, tss; - - native_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 = get_desc_base((struct desc_struct *)gdt); - printk(KERN_EMERG "double fault, tss at %08lx\n", tss); - - if (ptr_ok(tss)) { - struct x86_hw_tss *t = (struct x86_hw_tss *)tss; - - printk(KERN_EMERG "eip = %08lx, esp = %08lx\n", - t->ip, t->sp); - - printk(KERN_EMERG "eax = %08lx, ebx = %08lx, ecx = %08lx, edx = %08lx\n", - t->ax, t->bx, t->cx, t->dx); - printk(KERN_EMERG "esi = %08lx, edi = %08lx\n", - t->si, t->di); - } - } - - for (;;) - cpu_relax(); -} - -struct x86_hw_tss doublefault_tss __cacheline_aligned = { - .sp0 = STACK_START, - .ss0 = __KERNEL_DS, - .ldt = 0, - .io_bitmap_base = IO_BITMAP_OFFSET_INVALID, - - .ip = (unsigned long) doublefault_fn, - /* 0x2 bit is always set */ - .flags = X86_EFLAGS_SF | 0x2, - .sp = STACK_START, - .es = __USER_DS, - .cs = __KERNEL_CS, - .ss = __KERNEL_DS, - .ds = __USER_DS, - .fs = __KERNEL_PERCPU, -#ifndef CONFIG_X86_32_LAZY_GS - .gs = __KERNEL_STACK_CANARY, -#endif - - .__cr3 = __pa_nodebug(swapper_pg_dir), -}; - -#endif |