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On Mon, Jan 24, 2000 at 08:14:29AM +0100, Andreas Jaeger wrote:
>
> Looking through the various asm-*/siginfo.h files in Linux 2.3.41pre2,
> I've encountered only two platforms with problems: Alpha and Sparc.
> Could the maintainers of these platforms please check the following
> and take appropriate action?
>
> Alpha defines:
> #define SI_PAD_SIZE ((SI_MAX_SIZE/sizeof(int)) - 4)
> #define SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 4)
>
> but all other platforms have a 3 instead of a 4 for these two defines:
> #define SI_PAD_SIZE ((SI_MAX_SIZE/sizeof(int)) - 3)
> #define SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3)
>
> Sparc and Sparc64 additionally define the member _trapno for _sigfault
> - and SIGEMT is also only used by Sparc*:
> /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGEMT */
> struct {
> void *_addr; /* faulting insn/memory ref. */
> int _trapno; /* TRAP # which caused the signal */
> } _sigfault;
>
>
> Do we need Linux/alpha and Linux/sparc versions of <bits/siginfo.h>?
(Again, something which I had scheduled for today anyway).
IMHO, we need only separate version of sparc siginfo, plus use __WORDSIZE
in the generic linux version (I think ia64, ppc64, mips64 etc. could use it
as well):
2000-01-24 Jakub Jelinek <jakub@redhat.com>
* sysdeps/unix/sysv/linux/bits/siginfo.h (__SI_PAD_SIZE,
__SIGEV_PAD_SIZE): Define differently on __WORDSIZE == 64 platforms.
* sysdeps/unix/sysv/linux/sparc/bits/siginfo.h: New file.
* sysdeps/unix/sysv/linux/sigqueue.c (__sigqueue): Make sure we don't
send random data from our stack.
* sysdeps/unix/sysv/linux/aio_sigqueue.c (__aio_sigqueue): Likewise.
--- libc/sysdeps/unix/sysv/linux/bits/siginfo.h.jj Fri Nov 12 16:30:35 1999
+++ libc/sysdeps/unix/sysv/linux/bits/siginfo.h Mon Jan 24 08:23:15 2000
@@ -1,5 +1,5 @@
-/* siginfo_t, sigevent and constants. Linux version.
- Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
+/* siginfo_t, sigevent and constants. Linux/SPARC version.
+ Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@@ -21,6 +21,8 @@
# error "Never include this file directly. Use <signal.h> instead"
#endif
+#include <bits/wordsize.h>
+
#if (!defined __have_siginfo_t \
&& (defined _SIGNAL_H || defined __need_siginfo_t))
# define __have_siginfo_t 1
@@ -33,7 +35,11 @@ typedef union sigval
} sigval_t;
# define __SI_MAX_SIZE 128
-# define __SI_PAD_SIZE ((__SI_MAX_SIZE / sizeof (int)) - 3)
+# if __WORDSIZE == 64
+# define __SI_PAD_SIZE ((__SI_MAX_SIZE / sizeof (int)) - 4)
+# else
+# define __SI_PAD_SIZE ((__SI_MAX_SIZE / sizeof (int)) - 3)
+# endif
typedef struct siginfo
{
@@ -245,7 +251,11 @@ enum
/* Structure to transport application-defined values with signals. */
# define __SIGEV_MAX_SIZE 64
-# define __SIGEV_PAD_SIZE ((__SIGEV_MAX_SIZE / sizeof (int)) - 3)
+# if __WORDSIZE == 64
+# define __SIGEV_PAD_SIZE ((__SIGEV_MAX_SIZE / sizeof (int)) - 4)
+# else
+# define __SIGEV_PAD_SIZE ((__SIGEV_MAX_SIZE / sizeof (int)) - 3)
+# endif
typedef struct sigevent
{
--- libc/sysdeps/unix/sysv/linux/sparc/bits/siginfo.h.jj Mon Jan 24 08:14:28 2000
+++ libc/sysdeps/unix/sysv/linux/sparc/bits/siginfo.h Mon Jan 24 08:22:22 2000
@@ -0,0 +1,302 @@
+/* siginfo_t, sigevent and constants. Linux/SPARC version.
+ Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#if !defined _SIGNAL_H && !defined __need_siginfo_t
+# error "Never include this file directly. Use <signal.h> instead"
+#endif
+
+#include <bits/wordsize.h>
+
+#if (!defined __have_siginfo_t \
+ && (defined _SIGNAL_H || defined __need_siginfo_t))
+# define __have_siginfo_t 1
+
+/* Type for data associated with a signal. */
+typedef union sigval
+ {
+ int sival_int;
+ void *sival_ptr;
+ } sigval_t;
+
+# define __SI_MAX_SIZE 128
+# if __WORDSIZE == 64
+# define __SI_PAD_SIZE ((__SI_MAX_SIZE / sizeof (int)) - 4)
+# else
+# define __SI_PAD_SIZE ((__SI_MAX_SIZE / sizeof (int)) - 3)
+# endif
+
+typedef struct siginfo
+ {
+ int si_signo; /* Signal number. */
+ int si_errno; /* If non-zero, an errno value associated with
+ this signal, as defined in <errno.h>. */
+ int si_code; /* Signal code. */
+
+ union
+ {
+ int _pad[__SI_PAD_SIZE];
+
+ /* kill(). */
+ struct
+ {
+ __pid_t si_pid; /* Sending process ID. */
+ __uid_t si_uid; /* Real user ID of sending process. */
+ } _kill;
+
+ /* POSIX.1b timers. */
+ struct
+ {
+ unsigned int _timer1;
+ unsigned int _timer2;
+ } _timer;
+
+ /* POSIX.1b signals. */
+ struct
+ {
+ __pid_t si_pid; /* Sending process ID. */
+ __uid_t si_uid; /* Real user ID of sending process. */
+ sigval_t si_sigval; /* Signal value. */
+ } _rt;
+
+ /* SIGCHLD. */
+ struct
+ {
+ __pid_t si_pid; /* Which child. */
+ __uid_t si_uid; /* Real user ID of sending process. */
+ int si_status; /* Exit value or signal. */
+ __clock_t si_utime;
+ __clock_t si_stime;
+ } _sigchld;
+
+ /* SIGILL, SIGFPE, SIGSEGV, SIGBUS. */
+ struct
+ {
+ void *si_addr; /* Faulting insn/memory ref. */
+ int si_trapno;
+ } _sigfault;
+
+ /* SIGPOLL. */
+ struct
+ {
+ int si_band; /* Band event for SIGPOLL. */
+ int si_fd;
+ } _sigpoll;
+ } _sifields;
+ } siginfo_t;
+
+
+/* X/Open requires some more fields with fixed names. */
+# define si_pid _sifields._kill.si_pid
+# define si_uid _sifields._kill.si_uid
+# define si_timer1 _sifields._timer._timer1
+# define si_timer2 _sifields._timer._timer2
+# define si_status _sifields._sigchld.si_status
+# define si_utime _sifields._sigchld.si_utime
+# define si_stime _sifields._sigchld.si_stime
+# define si_value _sifields._rt.si_sigval
+# define si_int _sifields._rt.si_sigval.sival_int
+# define si_ptr _sifields._rt.si_sigval.sival_ptr
+# define si_addr _sifields._sigfault.si_addr
+# define si_trapno _sifields._sigfault.si_trapno
+# define si_band _sifields._sigpoll.si_band
+# define si_fd _sifields._sigpoll.si_fd
+
+
+/* Values for `si_code'. Positive values are reserved for kernel-generated
+ signals. */
+enum
+{
+ SI_SIGIO = -5, /* Sent by queued SIGIO. */
+# define SI_SIGIO SI_SIGIO
+ SI_ASYNCIO, /* Sent by AIO completion. */
+# define SI_ASYNCIO SI_ASYNCIO
+ SI_MESGQ, /* Sent by real time mesq state change. */
+# define SI_MESGQ SI_MESGQ
+ SI_TIMER, /* Sent by timer expiration. */
+# define SI_TIMER SI_TIMER
+ SI_QUEUE, /* Sent by sigqueue. */
+# define SI_QUEUE SI_QUEUE
+ SI_USER, /* Sent by kill, sigsend, raise. */
+# define SI_USER SI_USER
+ SI_KERNEL = 0x80 /* Send by kernel. */
+#define SI_KERNEL SI_KERNEL
+};
+
+
+/* `si_code' values for SIGILL signal. */
+enum
+{
+ ILL_ILLOPC = 1, /* Illegal opcode. */
+# define ILL_ILLOPC ILL_ILLOPC
+ ILL_ILLOPN, /* Illegal operand. */
+# define ILL_ILLOPN ILL_ILLOPN
+ ILL_ILLADR, /* Illegal addressing mode. */
+# define ILL_ILLADR ILL_ILLADR
+ ILL_ILLTRP, /* Illegal trap. */
+# define ILL_ILLTRP ILL_ILLTRP
+ ILL_PRVOPC, /* Privileged opcode. */
+# define ILL_PRVOPC ILL_PRVOPC
+ ILL_PRVREG, /* Privileged register. */
+# define ILL_PRVREG ILL_PRVREG
+ ILL_COPROC, /* Coprocessor error. */
+# define ILL_COPROC ILL_COPROC
+ ILL_BADSTK /* Internal stack error. */
+# define ILL_BADSTK ILL_BADSTK
+};
+
+/* `si_code' values for SIGFPE signal. */
+enum
+{
+ FPE_INTDIV = 1, /* Integer divide by zero. */
+# define FPE_INTDIV FPE_INTDIV
+ FPE_INTOVF, /* Integer overflow. */
+# define FPE_INTOVF FPE_INTOVF
+ FPE_FLTDIV, /* Floating point divide by zero. */
+# define FPE_FLTDIV FPE_FLTDIV
+ FPE_FLTOVF, /* Floating point overflow. */
+# define FPE_FLTOVF FPE_FLTOVF
+ FPE_FLTUND, /* Floating point underflow. */
+# define FPE_FLTUND FPE_FLTUND
+ FPE_FLTRES, /* Floating point inexact result. */
+# define FPE_FLTRES FPE_FLTRES
+ FPE_FLTINV, /* Floating point invalid operation. */
+# define FPE_FLTINV FPE_FLTINV
+ FPE_FLTSUB /* Subscript out of range. */
+# define FPE_FLTSUB FPE_FLTSUB
+};
+
+/* `si_code' values for SIGSEGV signal. */
+enum
+{
+ SEGV_MAPERR = 1, /* Address not mapped to object. */
+# define SEGV_MAPERR SEGV_MAPERR
+ SEGV_ACCERR /* Invalid permissions for mapped object. */
+# define SEGV_ACCERR SEGV_ACCERR
+};
+
+/* `si_code' values for SIGBUS signal. */
+enum
+{
+ BUS_ADRALN = 1, /* Invalid address alignment. */
+# define BUS_ADRALN BUS_ADRALN
+ BUS_ADRERR, /* Non-existant physical address. */
+# define BUS_ADRERR BUS_ADRERR
+ BUS_OBJERR /* Object specific hardware error. */
+# define BUS_OBJERR BUS_OBJERR
+};
+
+/* `si_code' values for SIGTRAP signal. */
+enum
+{
+ TRAP_BRKPT = 1, /* Process breakpoint. */
+# define TRAP_BRKPT TRAP_BRKPT
+ TRAP_TRACE /* Process trace trap. */
+# define TRAP_TRACE TRAP_TRACE
+};
+
+/* `si_code' values for SIGCHLD signal. */
+enum
+{
+ CLD_EXITED = 1, /* Child has exited. */
+# define CLD_EXITED CLD_EXITED
+ CLD_KILLED, /* Child was killed. */
+# define CLD_KILLED CLD_KILLED
+ CLD_DUMPED, /* Child terminated abnormally. */
+# define CLD_DUMPED CLD_DUMPED
+ CLD_TRAPPED, /* Traced child has trapped. */
+# define CLD_TRAPPED CLD_TRAPPED
+ CLD_STOPPED, /* Child has stopped. */
+# define CLD_STOPPED CLD_STOPPED
+ CLD_CONTINUED /* Stopped child has continued. */
+# define CLD_CONTINUED CLD_CONTINUED
+};
+
+/* `si_code' values for SIGPOLL signal. */
+enum
+{
+ POLL_IN = 1, /* Data input available. */
+# define POLL_IN POLL_IN
+ POLL_OUT, /* Output buffers available. */
+# define POLL_OUT POLL_OUT
+ POLL_MSG, /* Input message available. */
+# define POLL_MSG POLL_MSG
+ POLL_ERR, /* I/O error. */
+# define POLL_ERR POLL_ERR
+ POLL_PRI, /* High priority input available. */
+# define POLL_PRI POLL_PRI
+ POLL_HUP /* Device disconnected. */
+# define POLL_HUP POLL_HUP
+};
+
+/* `si_code' values for SIGEMT signal. */
+enum
+{
+ EMT_TAGOVF = 1 /* Tag overflow. */
+# define EMT_TAGOVF EMT_TAGOVF
+};
+
+# undef __need_siginfo_t
+#endif /* !have siginfo_t && (have _SIGNAL_H || need siginfo_t). */
+
+
+#if defined _SIGNAL_H && !defined __have_sigevent_t
+# define __have_sigevent_t 1
+
+/* Structure to transport application-defined values with signals. */
+# define __SIGEV_MAX_SIZE 64
+# if __WORDSIZE == 64
+# define __SIGEV_PAD_SIZE ((__SIGEV_MAX_SIZE / sizeof (int)) - 4)
+# else
+# define __SIGEV_PAD_SIZE ((__SIGEV_MAX_SIZE / sizeof (int)) - 3)
+# endif
+
+typedef struct sigevent
+ {
+ sigval_t sigev_value;
+ int sigev_signo;
+ int sigev_notify;
+
+ union
+ {
+ int _pad[__SIGEV_PAD_SIZE];
+
+ struct
+ {
+ void (*_function) (sigval_t); /* Function to start. */
+ void *_attribute; /* Really pthread_attr_t. */
+ } _sigev_thread;
+ } _sigev_un;
+ } sigevent_t;
+
+/* POSIX names to access some of the members. */
+# define sigev_notify_function _sigev_un._sigev_thread._function
+# define sigev_notify_attributes _sigev_un._sigev_thread._attribute
+
+/* `sigev_notify' values. */
+enum
+{
+ SIGEV_SIGNAL = 0, /* Notify via signal. */
+# define SIGEV_SIGNAL SIGEV_SIGNAL
+ SIGEV_NONE, /* Other notification: meaningless. */
+# define SIGEV_NONE SIGEV_NONE
+ SIGEV_THREAD /* Deliver via thread creation. */
+# define SIGEV_THREAD SIGEV_THREAD
+};
+
+#endif /* have _SIGNAL_H. */
--- libc/sysdeps/unix/sysv/linux/sigqueue.c.jj Sat Oct 31 11:28:05 1998
+++ libc/sysdeps/unix/sysv/linux/sigqueue.c Mon Jan 24 08:32:38 2000
@@ -1,4 +1,4 @@
-/* Copyright (C) 1997, 1998 Free Software Foundation, Inc.
+/* Copyright (C) 1997, 1998, 2000 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@@ -19,6 +19,7 @@
#include <errno.h>
#include <signal.h>
#include <unistd.h>
+#include <string.h>
#include <sysdep.h>
#include <sys/syscall.h>
@@ -35,9 +36,11 @@ __sigqueue (pid, sig, val)
{
siginfo_t info;
+ /* First, clear the siginfo_t structure, so that we don't pass our
+ stack content to other tasks. */
+ memset (&info, 0, sizeof (siginfo_t));
/* We must pass the information about the data in a siginfo_t value. */
info.si_signo = sig;
- info.si_errno = 0;
info.si_code = SI_QUEUE;
info.si_pid = __getpid ();
info.si_uid = __getuid ();
--- libc/sysdeps/unix/sysv/linux/aio_sigqueue.c.jj Sun Aug 15 20:12:27 1999
+++ libc/sysdeps/unix/sysv/linux/aio_sigqueue.c Mon Jan 24 08:34:46 2000
@@ -1,4 +1,4 @@
-/* Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
+/* Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@@ -20,6 +20,7 @@
#include <errno.h>
#include <signal.h>
#include <unistd.h>
+#include <string.h>
#include <sysdep.h>
#include <sys/syscall.h>
@@ -39,9 +40,11 @@ __aio_sigqueue (sig, val, caller_pid)
{
siginfo_t info;
+ /* First, clear the siginfo_t structure, so that we don't pass our
+ stack content to other tasks. */
+ memset (&info, 0, sizeof (siginfo_t));
/* We must pass the information about the data in a siginfo_t value. */
info.si_signo = sig;
- info.si_errno = 0;
info.si_code = SI_ASYNCIO;
info.si_pid = caller_pid;
info.si_uid = getuid ();
Cheers,
Jakub
___________________________________________________________________
Jakub Jelinek | jakub@redhat.com | http://sunsite.mff.cuni.cz/~jj
Linux version 2.3.40 on a sparc64 machine (1343.49 BogoMips)
___________________________________________________________________
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