forked from Minki/linux
ad5fa91399
Add new SIGBUS codes for reporting machine checks as signals. When the hardware detects an uncorrected ECC error it can trigger these signals. This is needed for telling KVM's qemu about machine checks that happen to guests, so that it can inject them, but might be also useful for other programs. I find it useful in my test programs. This patch merely defines the new types. - Define two new si_codes for SIGBUS. BUS_MCEERR_AO and BUS_MCEERR_AR * BUS_MCEERR_AO is for "Action Optional" machine checks, which means that some corruption has been detected in the background, but nothing has been consumed so far. The program can ignore those if it wants (but most programs would already get killed) * BUS_MCEERR_AR is for "Action Required" machine checks. This happens when corrupted data is consumed or the application ran into an area which has been known to be corrupted earlier. These require immediate action and cannot just returned to. Most programs would kill themselves. - They report the address of the corruption in the user address space in si_addr. - Define a new si_addr_lsb field that reports the extent of the corruption to user space. That's currently always a (small) page. The user application cannot tell where in this page the corruption happened. AK: I plan to write a man page update before anyone asks. Signed-off-by: Andi Kleen <ak@linux.intel.com>
303 lines
8.7 KiB
C
303 lines
8.7 KiB
C
#ifndef _ASM_GENERIC_SIGINFO_H
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#define _ASM_GENERIC_SIGINFO_H
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#include <linux/compiler.h>
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#include <linux/types.h>
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typedef union sigval {
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int sival_int;
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void __user *sival_ptr;
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} sigval_t;
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/*
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* This is the size (including padding) of the part of the
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* struct siginfo that is before the union.
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*/
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#ifndef __ARCH_SI_PREAMBLE_SIZE
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#define __ARCH_SI_PREAMBLE_SIZE (3 * sizeof(int))
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#endif
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#define SI_MAX_SIZE 128
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#ifndef SI_PAD_SIZE
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#define SI_PAD_SIZE ((SI_MAX_SIZE - __ARCH_SI_PREAMBLE_SIZE) / sizeof(int))
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#endif
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#ifndef __ARCH_SI_UID_T
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#define __ARCH_SI_UID_T __kernel_uid32_t
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#endif
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/*
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* The default "si_band" type is "long", as specified by POSIX.
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* However, some architectures want to override this to "int"
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* for historical compatibility reasons, so we allow that.
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*/
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#ifndef __ARCH_SI_BAND_T
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#define __ARCH_SI_BAND_T long
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#endif
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#ifndef HAVE_ARCH_SIGINFO_T
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typedef struct siginfo {
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int si_signo;
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int si_errno;
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int si_code;
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union {
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int _pad[SI_PAD_SIZE];
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/* kill() */
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struct {
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__kernel_pid_t _pid; /* sender's pid */
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__ARCH_SI_UID_T _uid; /* sender's uid */
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} _kill;
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/* POSIX.1b timers */
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struct {
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__kernel_timer_t _tid; /* timer id */
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int _overrun; /* overrun count */
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char _pad[sizeof( __ARCH_SI_UID_T) - sizeof(int)];
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sigval_t _sigval; /* same as below */
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int _sys_private; /* not to be passed to user */
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} _timer;
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/* POSIX.1b signals */
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struct {
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__kernel_pid_t _pid; /* sender's pid */
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__ARCH_SI_UID_T _uid; /* sender's uid */
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sigval_t _sigval;
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} _rt;
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/* SIGCHLD */
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struct {
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__kernel_pid_t _pid; /* which child */
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__ARCH_SI_UID_T _uid; /* sender's uid */
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int _status; /* exit code */
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__kernel_clock_t _utime;
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__kernel_clock_t _stime;
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} _sigchld;
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/* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
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struct {
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void __user *_addr; /* faulting insn/memory ref. */
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#ifdef __ARCH_SI_TRAPNO
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int _trapno; /* TRAP # which caused the signal */
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#endif
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short _addr_lsb; /* LSB of the reported address */
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} _sigfault;
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/* SIGPOLL */
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struct {
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__ARCH_SI_BAND_T _band; /* POLL_IN, POLL_OUT, POLL_MSG */
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int _fd;
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} _sigpoll;
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} _sifields;
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} siginfo_t;
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#endif
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/*
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* How these fields are to be accessed.
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*/
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#define si_pid _sifields._kill._pid
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#define si_uid _sifields._kill._uid
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#define si_tid _sifields._timer._tid
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#define si_overrun _sifields._timer._overrun
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#define si_sys_private _sifields._timer._sys_private
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#define si_status _sifields._sigchld._status
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#define si_utime _sifields._sigchld._utime
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#define si_stime _sifields._sigchld._stime
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#define si_value _sifields._rt._sigval
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#define si_int _sifields._rt._sigval.sival_int
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#define si_ptr _sifields._rt._sigval.sival_ptr
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#define si_addr _sifields._sigfault._addr
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#ifdef __ARCH_SI_TRAPNO
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#define si_trapno _sifields._sigfault._trapno
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#endif
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#define si_addr_lsb _sifields._sigfault._addr_lsb
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#define si_band _sifields._sigpoll._band
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#define si_fd _sifields._sigpoll._fd
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#ifdef __KERNEL__
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#define __SI_MASK 0xffff0000u
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#define __SI_KILL (0 << 16)
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#define __SI_TIMER (1 << 16)
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#define __SI_POLL (2 << 16)
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#define __SI_FAULT (3 << 16)
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#define __SI_CHLD (4 << 16)
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#define __SI_RT (5 << 16)
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#define __SI_MESGQ (6 << 16)
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#define __SI_CODE(T,N) ((T) | ((N) & 0xffff))
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#else
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#define __SI_KILL 0
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#define __SI_TIMER 0
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#define __SI_POLL 0
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#define __SI_FAULT 0
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#define __SI_CHLD 0
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#define __SI_RT 0
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#define __SI_MESGQ 0
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#define __SI_CODE(T,N) (N)
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#endif
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/*
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* si_code values
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* Digital reserves positive values for kernel-generated signals.
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*/
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#define SI_USER 0 /* sent by kill, sigsend, raise */
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#define SI_KERNEL 0x80 /* sent by the kernel from somewhere */
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#define SI_QUEUE -1 /* sent by sigqueue */
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#define SI_TIMER __SI_CODE(__SI_TIMER,-2) /* sent by timer expiration */
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#define SI_MESGQ __SI_CODE(__SI_MESGQ,-3) /* sent by real time mesq state change */
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#define SI_ASYNCIO -4 /* sent by AIO completion */
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#define SI_SIGIO -5 /* sent by queued SIGIO */
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#define SI_TKILL -6 /* sent by tkill system call */
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#define SI_DETHREAD -7 /* sent by execve() killing subsidiary threads */
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#define SI_FROMUSER(siptr) ((siptr)->si_code <= 0)
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#define SI_FROMKERNEL(siptr) ((siptr)->si_code > 0)
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/*
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* SIGILL si_codes
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*/
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#define ILL_ILLOPC (__SI_FAULT|1) /* illegal opcode */
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#define ILL_ILLOPN (__SI_FAULT|2) /* illegal operand */
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#define ILL_ILLADR (__SI_FAULT|3) /* illegal addressing mode */
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#define ILL_ILLTRP (__SI_FAULT|4) /* illegal trap */
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#define ILL_PRVOPC (__SI_FAULT|5) /* privileged opcode */
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#define ILL_PRVREG (__SI_FAULT|6) /* privileged register */
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#define ILL_COPROC (__SI_FAULT|7) /* coprocessor error */
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#define ILL_BADSTK (__SI_FAULT|8) /* internal stack error */
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#define NSIGILL 8
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/*
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* SIGFPE si_codes
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*/
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#define FPE_INTDIV (__SI_FAULT|1) /* integer divide by zero */
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#define FPE_INTOVF (__SI_FAULT|2) /* integer overflow */
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#define FPE_FLTDIV (__SI_FAULT|3) /* floating point divide by zero */
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#define FPE_FLTOVF (__SI_FAULT|4) /* floating point overflow */
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#define FPE_FLTUND (__SI_FAULT|5) /* floating point underflow */
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#define FPE_FLTRES (__SI_FAULT|6) /* floating point inexact result */
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#define FPE_FLTINV (__SI_FAULT|7) /* floating point invalid operation */
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#define FPE_FLTSUB (__SI_FAULT|8) /* subscript out of range */
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#define NSIGFPE 8
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/*
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* SIGSEGV si_codes
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*/
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#define SEGV_MAPERR (__SI_FAULT|1) /* address not mapped to object */
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#define SEGV_ACCERR (__SI_FAULT|2) /* invalid permissions for mapped object */
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#define NSIGSEGV 2
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/*
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* SIGBUS si_codes
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*/
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#define BUS_ADRALN (__SI_FAULT|1) /* invalid address alignment */
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#define BUS_ADRERR (__SI_FAULT|2) /* non-existant physical address */
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#define BUS_OBJERR (__SI_FAULT|3) /* object specific hardware error */
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/* hardware memory error consumed on a machine check: action required */
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#define BUS_MCEERR_AR (__SI_FAULT|4)
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/* hardware memory error detected in process but not consumed: action optional*/
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#define BUS_MCEERR_AO (__SI_FAULT|5)
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#define NSIGBUS 5
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/*
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* SIGTRAP si_codes
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*/
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#define TRAP_BRKPT (__SI_FAULT|1) /* process breakpoint */
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#define TRAP_TRACE (__SI_FAULT|2) /* process trace trap */
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#define TRAP_BRANCH (__SI_FAULT|3) /* process taken branch trap */
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#define TRAP_HWBKPT (__SI_FAULT|4) /* hardware breakpoint/watchpoint */
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#define NSIGTRAP 4
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/*
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* SIGCHLD si_codes
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*/
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#define CLD_EXITED (__SI_CHLD|1) /* child has exited */
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#define CLD_KILLED (__SI_CHLD|2) /* child was killed */
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#define CLD_DUMPED (__SI_CHLD|3) /* child terminated abnormally */
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#define CLD_TRAPPED (__SI_CHLD|4) /* traced child has trapped */
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#define CLD_STOPPED (__SI_CHLD|5) /* child has stopped */
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#define CLD_CONTINUED (__SI_CHLD|6) /* stopped child has continued */
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#define NSIGCHLD 6
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/*
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* SIGPOLL si_codes
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*/
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#define POLL_IN (__SI_POLL|1) /* data input available */
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#define POLL_OUT (__SI_POLL|2) /* output buffers available */
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#define POLL_MSG (__SI_POLL|3) /* input message available */
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#define POLL_ERR (__SI_POLL|4) /* i/o error */
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#define POLL_PRI (__SI_POLL|5) /* high priority input available */
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#define POLL_HUP (__SI_POLL|6) /* device disconnected */
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#define NSIGPOLL 6
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/*
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* sigevent definitions
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*
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* It seems likely that SIGEV_THREAD will have to be handled from
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* userspace, libpthread transmuting it to SIGEV_SIGNAL, which the
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* thread manager then catches and does the appropriate nonsense.
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* However, everything is written out here so as to not get lost.
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*/
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#define SIGEV_SIGNAL 0 /* notify via signal */
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#define SIGEV_NONE 1 /* other notification: meaningless */
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#define SIGEV_THREAD 2 /* deliver via thread creation */
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#define SIGEV_THREAD_ID 4 /* deliver to thread */
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/*
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* This works because the alignment is ok on all current architectures
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* but we leave open this being overridden in the future
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*/
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#ifndef __ARCH_SIGEV_PREAMBLE_SIZE
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#define __ARCH_SIGEV_PREAMBLE_SIZE (sizeof(int) * 2 + sizeof(sigval_t))
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#endif
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#define SIGEV_MAX_SIZE 64
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#define SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE - __ARCH_SIGEV_PREAMBLE_SIZE) \
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/ sizeof(int))
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typedef struct sigevent {
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sigval_t sigev_value;
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int sigev_signo;
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int sigev_notify;
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union {
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int _pad[SIGEV_PAD_SIZE];
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int _tid;
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struct {
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void (*_function)(sigval_t);
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void *_attribute; /* really pthread_attr_t */
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} _sigev_thread;
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} _sigev_un;
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} sigevent_t;
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#define sigev_notify_function _sigev_un._sigev_thread._function
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#define sigev_notify_attributes _sigev_un._sigev_thread._attribute
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#define sigev_notify_thread_id _sigev_un._tid
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#ifdef __KERNEL__
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struct siginfo;
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void do_schedule_next_timer(struct siginfo *info);
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#ifndef HAVE_ARCH_COPY_SIGINFO
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#include <linux/string.h>
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static inline void copy_siginfo(struct siginfo *to, struct siginfo *from)
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{
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if (from->si_code < 0)
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memcpy(to, from, sizeof(*to));
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else
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/* _sigchld is currently the largest know union member */
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memcpy(to, from, __ARCH_SI_PREAMBLE_SIZE + sizeof(from->_sifields._sigchld));
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}
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#endif
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extern int copy_siginfo_to_user(struct siginfo __user *to, struct siginfo *from);
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#endif /* __KERNEL__ */
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#endif
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