ed69fc2dc3
Instead of handling stacktrace capturing and mmap cache invalidating in sys_* functions, handle them uniformly in trace_syscall_entering using new flags introduced by previous two commits. The patch is simpler than its older version(v3). The value of hide_log_until_execve is just ignored. I found the value is nothing to do with this patch. unwind_cache_invalidate is mentioned only once in trace_syscall_exiting. Both are suggested by Dmitry Levin. Signed-off-by: Masatake YAMATO <yamato@redhat.com>
594 lines
13 KiB
C
594 lines
13 KiB
C
/*
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* Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
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* Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
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* Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
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* Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
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* Copyright (c) 2000 PocketPenguins Inc. Linux for Hitachi SuperH
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* port by Greg Banks <gbanks@pocketpenguins.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "defs.h"
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#include <asm/mman.h>
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#include <sys/mman.h>
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static unsigned long
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get_pagesize()
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{
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static unsigned long pagesize;
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if (!pagesize)
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pagesize = sysconf(_SC_PAGESIZE);
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return pagesize;
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}
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int
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sys_brk(struct tcb *tcp)
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{
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if (entering(tcp)) {
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tprintf("%#lx", tcp->u_arg[0]);
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}
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return RVAL_HEX;
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}
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#include "xlat/mmap_prot.h"
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#include "xlat/mmap_flags.h"
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static int
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print_mmap(struct tcb *tcp, long *u_arg, unsigned long long offset)
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{
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if (entering(tcp)) {
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/* addr */
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if (!u_arg[0])
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tprints("NULL, ");
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else
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tprintf("%#lx, ", u_arg[0]);
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/* len */
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tprintf("%lu, ", u_arg[1]);
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/* prot */
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printflags(mmap_prot, u_arg[2], "PROT_???");
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tprints(", ");
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/* flags */
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#ifdef MAP_TYPE
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printxval(mmap_flags, u_arg[3] & MAP_TYPE, "MAP_???");
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addflags(mmap_flags, u_arg[3] & ~MAP_TYPE);
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#else
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printflags(mmap_flags, u_arg[3], "MAP_???");
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#endif
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tprints(", ");
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/* fd */
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printfd(tcp, u_arg[4]);
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/* offset */
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tprintf(", %#llx", offset);
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}
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return RVAL_HEX;
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}
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/* Syscall name<->function correspondence is messed up on many arches.
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* For example:
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* i386 has __NR_mmap == 90, and it is "old mmap", and
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* also it has __NR_mmap2 == 192, which is a "new mmap with page offsets".
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* But x86_64 has just one __NR_mmap == 9, a "new mmap with byte offsets".
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* Confused? Me too!
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*/
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/* Params are pointed to by u_arg[0], offset is in bytes */
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int
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sys_old_mmap(struct tcb *tcp)
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{
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long u_arg[6];
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#if defined(IA64)
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/*
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* IA64 processes never call this routine, they only use the
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* new 'sys_mmap' interface. Only IA32 processes come here.
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*/
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int i;
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unsigned narrow_arg[6];
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if (umoven(tcp, tcp->u_arg[0], sizeof(narrow_arg), (char *) narrow_arg) == -1)
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return 0;
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for (i = 0; i < 6; i++)
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u_arg[i] = (unsigned long) narrow_arg[i];
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#elif defined(X86_64)
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/* We are here only in personality 1 (i386) */
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int i;
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unsigned narrow_arg[6];
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if (umoven(tcp, tcp->u_arg[0], sizeof(narrow_arg), (char *) narrow_arg) == -1)
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return 0;
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for (i = 0; i < 6; ++i)
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u_arg[i] = (unsigned long) narrow_arg[i];
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#else
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if (umoven(tcp, tcp->u_arg[0], sizeof(u_arg), (char *) u_arg) == -1)
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return 0;
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#endif
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return print_mmap(tcp, u_arg, (unsigned long) u_arg[5]);
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}
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#if defined(S390)
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/* Params are pointed to by u_arg[0], offset is in pages */
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int
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sys_old_mmap_pgoff(struct tcb *tcp)
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{
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long u_arg[5];
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int i;
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unsigned narrow_arg[6];
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unsigned long long offset;
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if (umoven(tcp, tcp->u_arg[0], sizeof(narrow_arg), (char *) narrow_arg) == -1)
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return 0;
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for (i = 0; i < 5; i++)
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u_arg[i] = (unsigned long) narrow_arg[i];
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offset = narrow_arg[5];
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offset *= get_pagesize();
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return print_mmap(tcp, u_arg, offset);
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}
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#endif
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/* Params are passed directly, offset is in bytes */
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int
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sys_mmap(struct tcb *tcp)
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{
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unsigned long long offset = (unsigned long) tcp->u_arg[5];
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#if defined(LINUX_MIPSN32) || defined(X32)
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/* Try test/x32_mmap.c */
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offset = tcp->ext_arg[5];
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#endif
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/* Example of kernel-side handling of this variety of mmap:
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* arch/x86/kernel/sys_x86_64.c::SYSCALL_DEFINE6(mmap, ...) calls
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* sys_mmap_pgoff(..., off >> PAGE_SHIFT); i.e. off is in bytes,
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* since the above code converts off to pages.
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*/
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return print_mmap(tcp, tcp->u_arg, offset);
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}
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/* Params are passed directly, offset is in pages */
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int
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sys_mmap_pgoff(struct tcb *tcp)
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{
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/* Try test/mmap_offset_decode.c */
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unsigned long long offset;
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offset = (unsigned long) tcp->u_arg[5];
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offset *= get_pagesize();
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return print_mmap(tcp, tcp->u_arg, offset);
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}
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/* Params are passed directly, offset is in 4k units */
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int
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sys_mmap_4koff(struct tcb *tcp)
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{
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unsigned long long offset;
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offset = (unsigned long) tcp->u_arg[5];
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offset <<= 12;
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return print_mmap(tcp, tcp->u_arg, offset);
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}
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int
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sys_munmap(struct tcb *tcp)
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{
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if (entering(tcp)) {
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tprintf("%#lx, %lu",
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tcp->u_arg[0], tcp->u_arg[1]);
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}
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return 0;
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}
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int
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sys_mprotect(struct tcb *tcp)
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{
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if (entering(tcp)) {
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tprintf("%#lx, %lu, ",
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tcp->u_arg[0], tcp->u_arg[1]);
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printflags(mmap_prot, tcp->u_arg[2], "PROT_???");
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}
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return 0;
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}
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#include "xlat/mremap_flags.h"
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int
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sys_mremap(struct tcb *tcp)
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{
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if (entering(tcp)) {
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tprintf("%#lx, %lu, %lu, ", tcp->u_arg[0], tcp->u_arg[1],
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tcp->u_arg[2]);
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printflags(mremap_flags, tcp->u_arg[3], "MREMAP_???");
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#ifdef MREMAP_FIXED
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if ((tcp->u_arg[3] & (MREMAP_MAYMOVE | MREMAP_FIXED)) ==
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(MREMAP_MAYMOVE | MREMAP_FIXED))
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tprintf(", %#lx", tcp->u_arg[4]);
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#endif
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}
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return RVAL_HEX;
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}
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#include "xlat/madvise_cmds.h"
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int
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sys_madvise(struct tcb *tcp)
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{
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if (entering(tcp)) {
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tprintf("%#lx, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
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printxval(madvise_cmds, tcp->u_arg[2], "MADV_???");
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}
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return 0;
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}
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#include "xlat/mlockall_flags.h"
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int
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sys_mlockall(struct tcb *tcp)
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{
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if (entering(tcp)) {
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printflags(mlockall_flags, tcp->u_arg[0], "MCL_???");
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}
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return 0;
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}
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#ifdef MS_ASYNC
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#include "xlat/mctl_sync.h"
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int
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sys_msync(struct tcb *tcp)
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{
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if (entering(tcp)) {
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/* addr */
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tprintf("%#lx", tcp->u_arg[0]);
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/* len */
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tprintf(", %lu, ", tcp->u_arg[1]);
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/* flags */
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printflags(mctl_sync, tcp->u_arg[2], "MS_???");
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}
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return 0;
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}
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#endif /* MS_ASYNC */
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#ifdef MC_SYNC
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#include "xlat/mctl_funcs.h"
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#include "xlat/mctl_lockas.h"
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int
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sys_mctl(struct tcb *tcp)
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{
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int arg, function;
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if (entering(tcp)) {
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/* addr */
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tprintf("%#lx", tcp->u_arg[0]);
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/* len */
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tprintf(", %lu, ", tcp->u_arg[1]);
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/* function */
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function = tcp->u_arg[2];
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printflags(mctl_funcs, function, "MC_???");
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/* arg */
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arg = tcp->u_arg[3];
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tprints(", ");
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switch (function) {
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case MC_SYNC:
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printflags(mctl_sync, arg, "MS_???");
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break;
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case MC_LOCKAS:
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printflags(mctl_lockas, arg, "MCL_???");
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break;
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default:
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tprintf("%#x", arg);
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break;
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}
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}
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return 0;
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}
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#endif /* MC_SYNC */
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int
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sys_mincore(struct tcb *tcp)
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{
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if (entering(tcp)) {
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tprintf("%#lx, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
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} else {
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unsigned long i, len;
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char *vec = NULL;
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len = tcp->u_arg[1];
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if (syserror(tcp) || tcp->u_arg[2] == 0 ||
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(vec = malloc(len)) == NULL ||
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umoven(tcp, tcp->u_arg[2], len, vec) < 0)
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tprintf("%#lx", tcp->u_arg[2]);
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else {
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tprints("[");
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for (i = 0; i < len; i++) {
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if (abbrev(tcp) && i >= max_strlen) {
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tprints("...");
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break;
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}
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tprints((vec[i] & 1) ? "1" : "0");
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}
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tprints("]");
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}
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free(vec);
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}
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return 0;
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}
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#if defined(ALPHA) || defined(IA64) || defined(SPARC) || defined(SPARC64)
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int
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sys_getpagesize(struct tcb *tcp)
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{
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if (exiting(tcp))
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return RVAL_HEX;
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return 0;
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}
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#endif
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int
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sys_remap_file_pages(struct tcb *tcp)
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{
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if (entering(tcp)) {
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tprintf("%#lx, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
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printflags(mmap_prot, tcp->u_arg[2], "PROT_???");
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tprintf(", %lu, ", tcp->u_arg[3]);
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#ifdef MAP_TYPE
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printxval(mmap_flags, tcp->u_arg[4] & MAP_TYPE, "MAP_???");
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addflags(mmap_flags, tcp->u_arg[4] & ~MAP_TYPE);
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#else
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printflags(mmap_flags, tcp->u_arg[4], "MAP_???");
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#endif
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}
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return 0;
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}
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#define MPOL_DEFAULT 0
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#define MPOL_PREFERRED 1
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#define MPOL_BIND 2
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#define MPOL_INTERLEAVE 3
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#define MPOL_F_NODE (1<<0)
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#define MPOL_F_ADDR (1<<1)
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#define MPOL_MF_STRICT (1<<0)
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#define MPOL_MF_MOVE (1<<1)
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#define MPOL_MF_MOVE_ALL (1<<2)
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#include "xlat/policies.h"
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#include "xlat/mbindflags.h"
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#include "xlat/mempolicyflags.h"
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#include "xlat/move_pages_flags.h"
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static void
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get_nodes(struct tcb *tcp, unsigned long ptr, unsigned long maxnodes, int err)
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{
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unsigned long nlongs, size, end;
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nlongs = (maxnodes + 8 * sizeof(long) - 1) / (8 * sizeof(long));
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size = nlongs * sizeof(long);
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end = ptr + size;
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if (nlongs == 0 || ((err || verbose(tcp)) && (size * 8 == maxnodes)
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&& (end > ptr))) {
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unsigned long n, cur, abbrev_end;
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int failed = 0;
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if (abbrev(tcp)) {
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abbrev_end = ptr + max_strlen * sizeof(long);
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if (abbrev_end < ptr)
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abbrev_end = end;
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} else {
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abbrev_end = end;
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}
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tprints(", {");
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for (cur = ptr; cur < end; cur += sizeof(long)) {
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if (cur > ptr)
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tprints(", ");
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if (cur >= abbrev_end) {
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tprints("...");
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break;
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}
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if (umoven(tcp, cur, sizeof(n), (char *) &n) < 0) {
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tprints("?");
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failed = 1;
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break;
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}
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tprintf("%#0*lx", (int) sizeof(long) * 2 + 2, n);
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}
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tprints("}");
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if (failed)
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tprintf(" %#lx", ptr);
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} else
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tprintf(", %#lx", ptr);
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tprintf(", %lu", maxnodes);
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}
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int
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sys_mbind(struct tcb *tcp)
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{
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if (entering(tcp)) {
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tprintf("%#lx, %lu, ", tcp->u_arg[0], tcp->u_arg[1]);
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printxval(policies, tcp->u_arg[2], "MPOL_???");
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get_nodes(tcp, tcp->u_arg[3], tcp->u_arg[4], 0);
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tprints(", ");
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printflags(mbindflags, tcp->u_arg[5], "MPOL_???");
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}
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return 0;
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}
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int
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sys_set_mempolicy(struct tcb *tcp)
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{
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if (entering(tcp)) {
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printxval(policies, tcp->u_arg[0], "MPOL_???");
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get_nodes(tcp, tcp->u_arg[1], tcp->u_arg[2], 0);
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}
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return 0;
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}
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int
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sys_get_mempolicy(struct tcb *tcp)
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{
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if (exiting(tcp)) {
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int pol;
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if (tcp->u_arg[0] == 0)
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tprints("NULL");
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else if (syserror(tcp) || umove(tcp, tcp->u_arg[0], &pol) < 0)
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tprintf("%#lx", tcp->u_arg[0]);
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else
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printxval(policies, pol, "MPOL_???");
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get_nodes(tcp, tcp->u_arg[1], tcp->u_arg[2], syserror(tcp));
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tprintf(", %#lx, ", tcp->u_arg[3]);
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printflags(mempolicyflags, tcp->u_arg[4], "MPOL_???");
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}
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return 0;
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}
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int
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sys_migrate_pages(struct tcb *tcp)
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{
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if (entering(tcp)) {
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tprintf("%ld, ", (long) (pid_t) tcp->u_arg[0]);
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get_nodes(tcp, tcp->u_arg[2], tcp->u_arg[1], 0);
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tprints(", ");
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get_nodes(tcp, tcp->u_arg[3], tcp->u_arg[1], 0);
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}
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return 0;
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}
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int
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sys_move_pages(struct tcb *tcp)
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{
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if (entering(tcp)) {
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unsigned long npages = tcp->u_arg[1];
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tprintf("%ld, %lu, ", tcp->u_arg[0], npages);
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if (tcp->u_arg[2] == 0)
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tprints("NULL, ");
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else {
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int i;
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long puser = tcp->u_arg[2];
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tprints("{");
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for (i = 0; i < npages; ++i) {
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void *p;
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if (i > 0)
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tprints(", ");
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if (umove(tcp, puser, &p) < 0) {
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tprints("???");
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break;
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}
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tprintf("%p", p);
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puser += sizeof(void *);
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}
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tprints("}, ");
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}
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if (tcp->u_arg[3] == 0)
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tprints("NULL, ");
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else {
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int i;
|
|
long nodeuser = tcp->u_arg[3];
|
|
tprints("{");
|
|
for (i = 0; i < npages; ++i) {
|
|
int node;
|
|
if (i > 0)
|
|
tprints(", ");
|
|
if (umove(tcp, nodeuser, &node) < 0) {
|
|
tprints("???");
|
|
break;
|
|
}
|
|
tprintf("%#x", node);
|
|
nodeuser += sizeof(int);
|
|
}
|
|
tprints("}, ");
|
|
}
|
|
}
|
|
if (exiting(tcp)) {
|
|
unsigned long npages = tcp->u_arg[1];
|
|
if (tcp->u_arg[4] == 0)
|
|
tprints("NULL, ");
|
|
else {
|
|
int i;
|
|
long statususer = tcp->u_arg[4];
|
|
tprints("{");
|
|
for (i = 0; i < npages; ++i) {
|
|
int status;
|
|
if (i > 0)
|
|
tprints(", ");
|
|
if (umove(tcp, statususer, &status) < 0) {
|
|
tprints("???");
|
|
break;
|
|
}
|
|
tprintf("%#x", status);
|
|
statususer += sizeof(int);
|
|
}
|
|
tprints("}, ");
|
|
}
|
|
printflags(move_pages_flags, tcp->u_arg[5], "MPOL_???");
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#if defined(POWERPC)
|
|
int
|
|
sys_subpage_prot(struct tcb *tcp)
|
|
{
|
|
if (entering(tcp)) {
|
|
unsigned long cur, end, abbrev_end, entries;
|
|
unsigned int entry;
|
|
|
|
tprintf("%#lx, %#lx, ", tcp->u_arg[0], tcp->u_arg[1]);
|
|
entries = tcp->u_arg[1] >> 16;
|
|
if (!entries || !tcp->u_arg[2]) {
|
|
tprints("{}");
|
|
return 0;
|
|
}
|
|
cur = tcp->u_arg[2];
|
|
end = cur + (sizeof(int) * entries);
|
|
if (!verbose(tcp) || end < tcp->u_arg[2]) {
|
|
tprintf("%#lx", tcp->u_arg[2]);
|
|
return 0;
|
|
}
|
|
if (abbrev(tcp)) {
|
|
abbrev_end = cur + (sizeof(int) * max_strlen);
|
|
if (abbrev_end > end)
|
|
abbrev_end = end;
|
|
}
|
|
else
|
|
abbrev_end = end;
|
|
tprints("{");
|
|
for (; cur < end; cur += sizeof(int)) {
|
|
if (cur > tcp->u_arg[2])
|
|
tprints(", ");
|
|
if (cur >= abbrev_end) {
|
|
tprints("...");
|
|
break;
|
|
}
|
|
if (umove(tcp, cur, &entry) < 0) {
|
|
tprintf("??? [%#lx]", cur);
|
|
break;
|
|
}
|
|
else
|
|
tprintf("%#08x", entry);
|
|
}
|
|
tprints("}");
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#endif
|