mirror of
https://github.com/torvalds/linux.git
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65fddcfca8
The replacement of <asm/pgrable.h> with <linux/pgtable.h> made the include
of the latter in the middle of asm includes. Fix this up with the aid of
the below script and manual adjustments here and there.
import sys
import re
if len(sys.argv) is not 3:
print "USAGE: %s <file> <header>" % (sys.argv[0])
sys.exit(1)
hdr_to_move="#include <linux/%s>" % sys.argv[2]
moved = False
in_hdrs = False
with open(sys.argv[1], "r") as f:
lines = f.readlines()
for _line in lines:
line = _line.rstrip('
')
if line == hdr_to_move:
continue
if line.startswith("#include <linux/"):
in_hdrs = True
elif not moved and in_hdrs:
moved = True
print hdr_to_move
print line
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Cain <bcain@codeaurora.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chris Zankel <chris@zankel.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Greg Ungerer <gerg@linux-m68k.org>
Cc: Guan Xuetao <gxt@pku.edu.cn>
Cc: Guo Ren <guoren@kernel.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Ley Foon Tan <ley.foon.tan@intel.com>
Cc: Mark Salter <msalter@redhat.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Nick Hu <nickhu@andestech.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Rich Felker <dalias@libc.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vincent Chen <deanbo422@gmail.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Link: http://lkml.kernel.org/r/20200514170327.31389-4-rppt@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
397 lines
11 KiB
C
397 lines
11 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* arch/sparc/kernel/traps.c
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*
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* Copyright 1995, 2008 David S. Miller (davem@davemloft.net)
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* Copyright 2000 Jakub Jelinek (jakub@redhat.com)
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*/
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/*
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* I hate traps on the sparc, grrr...
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*/
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#include <linux/sched/mm.h>
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#include <linux/sched/debug.h>
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#include <linux/mm_types.h>
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#include <linux/kernel.h>
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#include <linux/signal.h>
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#include <linux/smp.h>
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#include <linux/kdebug.h>
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#include <linux/export.h>
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#include <linux/pgtable.h>
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#include <asm/delay.h>
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#include <asm/ptrace.h>
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#include <asm/oplib.h>
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#include <asm/page.h>
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#include <asm/unistd.h>
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#include <asm/traps.h>
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#include "entry.h"
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#include "kernel.h"
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/* #define TRAP_DEBUG */
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static void instruction_dump(unsigned long *pc)
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{
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int i;
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if((((unsigned long) pc) & 3))
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return;
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for(i = -3; i < 6; i++)
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printk("%c%08lx%c",i?' ':'<',pc[i],i?' ':'>');
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printk("\n");
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}
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#define __SAVE __asm__ __volatile__("save %sp, -0x40, %sp\n\t")
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#define __RESTORE __asm__ __volatile__("restore %g0, %g0, %g0\n\t")
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void __noreturn die_if_kernel(char *str, struct pt_regs *regs)
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{
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static int die_counter;
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int count = 0;
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/* Amuse the user. */
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printk(
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" \\|/ ____ \\|/\n"
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" \"@'/ ,. \\`@\"\n"
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" /_| \\__/ |_\\\n"
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" \\__U_/\n");
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printk("%s(%d): %s [#%d]\n", current->comm, task_pid_nr(current), str, ++die_counter);
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show_regs(regs);
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add_taint(TAINT_DIE, LOCKDEP_NOW_UNRELIABLE);
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__SAVE; __SAVE; __SAVE; __SAVE;
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__SAVE; __SAVE; __SAVE; __SAVE;
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__RESTORE; __RESTORE; __RESTORE; __RESTORE;
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__RESTORE; __RESTORE; __RESTORE; __RESTORE;
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{
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struct reg_window32 *rw = (struct reg_window32 *)regs->u_regs[UREG_FP];
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/* Stop the back trace when we hit userland or we
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* find some badly aligned kernel stack. Set an upper
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* bound in case our stack is trashed and we loop.
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*/
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while(rw &&
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count++ < 30 &&
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(((unsigned long) rw) >= PAGE_OFFSET) &&
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!(((unsigned long) rw) & 0x7)) {
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printk("Caller[%08lx]: %pS\n", rw->ins[7],
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(void *) rw->ins[7]);
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rw = (struct reg_window32 *)rw->ins[6];
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}
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}
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printk("Instruction DUMP:");
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instruction_dump ((unsigned long *) regs->pc);
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if(regs->psr & PSR_PS)
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do_exit(SIGKILL);
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do_exit(SIGSEGV);
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}
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void do_hw_interrupt(struct pt_regs *regs, unsigned long type)
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{
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if(type < 0x80) {
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/* Sun OS's puke from bad traps, Linux survives! */
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printk("Unimplemented Sparc TRAP, type = %02lx\n", type);
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die_if_kernel("Whee... Hello Mr. Penguin", regs);
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}
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if(regs->psr & PSR_PS)
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die_if_kernel("Kernel bad trap", regs);
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force_sig_fault(SIGILL, ILL_ILLTRP,
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(void __user *)regs->pc, type - 0x80);
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}
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void do_illegal_instruction(struct pt_regs *regs, unsigned long pc, unsigned long npc,
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unsigned long psr)
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{
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if(psr & PSR_PS)
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die_if_kernel("Kernel illegal instruction", regs);
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#ifdef TRAP_DEBUG
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printk("Ill instr. at pc=%08lx instruction is %08lx\n",
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regs->pc, *(unsigned long *)regs->pc);
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#endif
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send_sig_fault(SIGILL, ILL_ILLOPC, (void __user *)pc, 0, current);
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}
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void do_priv_instruction(struct pt_regs *regs, unsigned long pc, unsigned long npc,
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unsigned long psr)
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{
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if(psr & PSR_PS)
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die_if_kernel("Penguin instruction from Penguin mode??!?!", regs);
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send_sig_fault(SIGILL, ILL_PRVOPC, (void __user *)pc, 0, current);
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}
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/* XXX User may want to be allowed to do this. XXX */
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void do_memaccess_unaligned(struct pt_regs *regs, unsigned long pc, unsigned long npc,
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unsigned long psr)
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{
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if(regs->psr & PSR_PS) {
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printk("KERNEL MNA at pc %08lx npc %08lx called by %08lx\n", pc, npc,
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regs->u_regs[UREG_RETPC]);
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die_if_kernel("BOGUS", regs);
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/* die_if_kernel("Kernel MNA access", regs); */
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}
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#if 0
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show_regs (regs);
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instruction_dump ((unsigned long *) regs->pc);
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printk ("do_MNA!\n");
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#endif
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send_sig_fault(SIGBUS, BUS_ADRALN,
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/* FIXME: Should dig out mna address */ (void *)0,
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0, current);
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}
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static unsigned long init_fsr = 0x0UL;
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static unsigned long init_fregs[32] __attribute__ ((aligned (8))) =
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{ ~0UL, ~0UL, ~0UL, ~0UL, ~0UL, ~0UL, ~0UL, ~0UL,
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~0UL, ~0UL, ~0UL, ~0UL, ~0UL, ~0UL, ~0UL, ~0UL,
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~0UL, ~0UL, ~0UL, ~0UL, ~0UL, ~0UL, ~0UL, ~0UL,
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~0UL, ~0UL, ~0UL, ~0UL, ~0UL, ~0UL, ~0UL, ~0UL };
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void do_fpd_trap(struct pt_regs *regs, unsigned long pc, unsigned long npc,
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unsigned long psr)
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{
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/* Sanity check... */
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if(psr & PSR_PS)
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die_if_kernel("Kernel gets FloatingPenguinUnit disabled trap", regs);
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put_psr(get_psr() | PSR_EF); /* Allow FPU ops. */
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regs->psr |= PSR_EF;
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#ifndef CONFIG_SMP
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if(last_task_used_math == current)
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return;
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if(last_task_used_math) {
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/* Other processes fpu state, save away */
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struct task_struct *fptask = last_task_used_math;
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fpsave(&fptask->thread.float_regs[0], &fptask->thread.fsr,
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&fptask->thread.fpqueue[0], &fptask->thread.fpqdepth);
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}
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last_task_used_math = current;
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if(used_math()) {
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fpload(¤t->thread.float_regs[0], ¤t->thread.fsr);
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} else {
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/* Set initial sane state. */
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fpload(&init_fregs[0], &init_fsr);
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set_used_math();
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}
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#else
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if(!used_math()) {
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fpload(&init_fregs[0], &init_fsr);
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set_used_math();
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} else {
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fpload(¤t->thread.float_regs[0], ¤t->thread.fsr);
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}
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set_thread_flag(TIF_USEDFPU);
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#endif
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}
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static unsigned long fake_regs[32] __attribute__ ((aligned (8)));
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static unsigned long fake_fsr;
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static unsigned long fake_queue[32] __attribute__ ((aligned (8)));
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static unsigned long fake_depth;
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void do_fpe_trap(struct pt_regs *regs, unsigned long pc, unsigned long npc,
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unsigned long psr)
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{
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static int calls;
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unsigned long fsr;
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int ret = 0;
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int code;
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#ifndef CONFIG_SMP
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struct task_struct *fpt = last_task_used_math;
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#else
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struct task_struct *fpt = current;
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#endif
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put_psr(get_psr() | PSR_EF);
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/* If nobody owns the fpu right now, just clear the
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* error into our fake static buffer and hope it don't
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* happen again. Thank you crashme...
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*/
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#ifndef CONFIG_SMP
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if(!fpt) {
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#else
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if (!test_tsk_thread_flag(fpt, TIF_USEDFPU)) {
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#endif
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fpsave(&fake_regs[0], &fake_fsr, &fake_queue[0], &fake_depth);
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regs->psr &= ~PSR_EF;
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return;
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}
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fpsave(&fpt->thread.float_regs[0], &fpt->thread.fsr,
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&fpt->thread.fpqueue[0], &fpt->thread.fpqdepth);
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#ifdef DEBUG_FPU
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printk("Hmm, FP exception, fsr was %016lx\n", fpt->thread.fsr);
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#endif
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switch ((fpt->thread.fsr & 0x1c000)) {
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/* switch on the contents of the ftt [floating point trap type] field */
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#ifdef DEBUG_FPU
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case (1 << 14):
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printk("IEEE_754_exception\n");
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break;
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#endif
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case (2 << 14): /* unfinished_FPop (underflow & co) */
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case (3 << 14): /* unimplemented_FPop (quad stuff, maybe sqrt) */
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ret = do_mathemu(regs, fpt);
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break;
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#ifdef DEBUG_FPU
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case (4 << 14):
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printk("sequence_error (OS bug...)\n");
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break;
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case (5 << 14):
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printk("hardware_error (uhoh!)\n");
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break;
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case (6 << 14):
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printk("invalid_fp_register (user error)\n");
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break;
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#endif /* DEBUG_FPU */
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}
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/* If we successfully emulated the FPop, we pretend the trap never happened :-> */
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if (ret) {
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fpload(¤t->thread.float_regs[0], ¤t->thread.fsr);
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return;
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}
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/* nope, better SIGFPE the offending process... */
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#ifdef CONFIG_SMP
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clear_tsk_thread_flag(fpt, TIF_USEDFPU);
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#endif
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if(psr & PSR_PS) {
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/* The first fsr store/load we tried trapped,
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* the second one will not (we hope).
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*/
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printk("WARNING: FPU exception from kernel mode. at pc=%08lx\n",
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regs->pc);
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regs->pc = regs->npc;
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regs->npc += 4;
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calls++;
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if(calls > 2)
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die_if_kernel("Too many Penguin-FPU traps from kernel mode",
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regs);
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return;
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}
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fsr = fpt->thread.fsr;
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code = FPE_FLTUNK;
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if ((fsr & 0x1c000) == (1 << 14)) {
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if (fsr & 0x10)
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code = FPE_FLTINV;
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else if (fsr & 0x08)
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code = FPE_FLTOVF;
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else if (fsr & 0x04)
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code = FPE_FLTUND;
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else if (fsr & 0x02)
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code = FPE_FLTDIV;
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else if (fsr & 0x01)
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code = FPE_FLTRES;
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}
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send_sig_fault(SIGFPE, code, (void __user *)pc, 0, fpt);
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#ifndef CONFIG_SMP
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last_task_used_math = NULL;
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#endif
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regs->psr &= ~PSR_EF;
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if(calls > 0)
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calls=0;
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}
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void handle_tag_overflow(struct pt_regs *regs, unsigned long pc, unsigned long npc,
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unsigned long psr)
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{
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if(psr & PSR_PS)
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die_if_kernel("Penguin overflow trap from kernel mode", regs);
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send_sig_fault(SIGEMT, EMT_TAGOVF, (void __user *)pc, 0, current);
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}
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void handle_watchpoint(struct pt_regs *regs, unsigned long pc, unsigned long npc,
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unsigned long psr)
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{
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#ifdef TRAP_DEBUG
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printk("Watchpoint detected at PC %08lx NPC %08lx PSR %08lx\n",
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pc, npc, psr);
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#endif
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if(psr & PSR_PS)
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panic("Tell me what a watchpoint trap is, and I'll then deal "
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"with such a beast...");
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}
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void handle_reg_access(struct pt_regs *regs, unsigned long pc, unsigned long npc,
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unsigned long psr)
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{
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#ifdef TRAP_DEBUG
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printk("Register Access Exception at PC %08lx NPC %08lx PSR %08lx\n",
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pc, npc, psr);
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#endif
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force_sig_fault(SIGBUS, BUS_OBJERR, (void __user *)pc, 0);
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}
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void handle_cp_disabled(struct pt_regs *regs, unsigned long pc, unsigned long npc,
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unsigned long psr)
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{
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send_sig_fault(SIGILL, ILL_COPROC, (void __user *)pc, 0, current);
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}
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void handle_cp_exception(struct pt_regs *regs, unsigned long pc, unsigned long npc,
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unsigned long psr)
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{
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#ifdef TRAP_DEBUG
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printk("Co-Processor Exception at PC %08lx NPC %08lx PSR %08lx\n",
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pc, npc, psr);
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#endif
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send_sig_fault(SIGILL, ILL_COPROC, (void __user *)pc, 0, current);
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}
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void handle_hw_divzero(struct pt_regs *regs, unsigned long pc, unsigned long npc,
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unsigned long psr)
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{
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send_sig_fault(SIGFPE, FPE_INTDIV, (void __user *)pc, 0, current);
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}
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#ifdef CONFIG_DEBUG_BUGVERBOSE
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void do_BUG(const char *file, int line)
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{
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// bust_spinlocks(1); XXX Not in our original BUG()
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printk("kernel BUG at %s:%d!\n", file, line);
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}
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EXPORT_SYMBOL(do_BUG);
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#endif
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/* Since we have our mappings set up, on multiprocessors we can spin them
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* up here so that timer interrupts work during initialization.
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*/
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void trap_init(void)
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{
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extern void thread_info_offsets_are_bolixed_pete(void);
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/* Force linker to barf if mismatched */
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if (TI_UWINMASK != offsetof(struct thread_info, uwinmask) ||
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TI_TASK != offsetof(struct thread_info, task) ||
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TI_FLAGS != offsetof(struct thread_info, flags) ||
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TI_CPU != offsetof(struct thread_info, cpu) ||
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TI_PREEMPT != offsetof(struct thread_info, preempt_count) ||
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TI_SOFTIRQ != offsetof(struct thread_info, softirq_count) ||
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TI_HARDIRQ != offsetof(struct thread_info, hardirq_count) ||
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TI_KSP != offsetof(struct thread_info, ksp) ||
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TI_KPC != offsetof(struct thread_info, kpc) ||
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TI_KPSR != offsetof(struct thread_info, kpsr) ||
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TI_KWIM != offsetof(struct thread_info, kwim) ||
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TI_REG_WINDOW != offsetof(struct thread_info, reg_window) ||
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TI_RWIN_SPTRS != offsetof(struct thread_info, rwbuf_stkptrs) ||
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TI_W_SAVED != offsetof(struct thread_info, w_saved))
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thread_info_offsets_are_bolixed_pete();
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/* Attach to the address space of init_task. */
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mmgrab(&init_mm);
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current->active_mm = &init_mm;
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/* NOTE: Other cpus have this done as they are started
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* up on SMP.
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*/
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}
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