/*=========================================================================== Copyright (c) 1998-2000, The Santa Cruz Operation All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: *Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. *Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. *Neither name of The Santa Cruz Operation nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. =========================================================================*/ /* cscope - interactive C symbol cross-reference * * file editing functions */ #include "global.h" #if defined(USE_NCURSES) && !defined(RENAMED_NCURSES) #include #else #include #endif static char const rcsid[] = "$Id: edit.c,v 1.7 2009/04/10 13:39:23 broeker Exp $"; /* edit this displayed reference */ void editref(int i) { char file[PATHLEN + 1]; /* file name */ char linenum[NUMLEN + 1]; /* line number */ /* verify that there is a references found file */ if (refsfound == NULL) { return; } /* get the selected line */ seekline(i + topline); /* get the file name and line number */ if (fscanf(refsfound, "%" PATHLEN_STR "s%*s%" NUMLEN_STR "s", file, linenum) == 2) { edit(file, linenum); /* edit it */ } seekline(topline); /* restore the line pointer */ } /* edit all references */ void editall(void) { char file[PATHLEN + 1]; /* file name */ char linenum[NUMLEN + 1]; /* line number */ int c; /* verify that there is a references found file */ if (refsfound == NULL) { return; } /* get the first line */ seekline(1); /* get each file name and line number */ while (fscanf(refsfound, "%" PATHLEN_STR "s%*s%" NUMLEN_STR "s%*[^\n]", file, linenum) == 2) { edit(file, linenum); /* edit it */ if (editallprompt == YES) { addstr("Type ^D to stop editing all lines, or any other character to continue: "); if ((c = mygetch()) == EOF || c == ctrl('D') || c == ctrl('Z')) { break; } } } seekline(topline); } /* call the editor */ void edit(char *file, char *linenum) { char msg[MSGLEN + 1]; /* message */ char plusnum[NUMLEN + 20]; /* line number option: allow space for wordy line# flag */ char *s; file = filepath(file); (void) snprintf(msg, sizeof(msg), "%s +%s %s", mybasename(editor), linenum, file); postmsg(msg); (void) snprintf(plusnum, sizeof(plusnum), lineflag, linenum); /* if this is the more or page commands */ if (strcmp(s = mybasename(editor), "more") == 0 || strcmp(s, "page") == 0) { /* get it to pause after displaying a file smaller than the screen length */ (void) execute(editor, editor, plusnum, file, "/dev/null", NULL); } else if (lineflagafterfile) { (void) execute(editor, editor, file, plusnum, NULL); } else { (void) execute(editor, editor, plusnum, file, NULL); } clear(); /* redisplay screen */ } /* if requested, prepend a path to a relative file name */ char * filepath(char *file) { static char path[PATHLEN + 1]; if (prependpath != NULL && *file != '/') { (void) snprintf(path, sizeof(path), "%s/%s", prependpath, file); file = path; } return(file); } option>space:mode:
authorArd Biesheuvel <ard.biesheuvel@linaro.org>2017-02-01 17:45:02 +0000
committerIngo Molnar <mingo@kernel.org>2017-02-01 21:17:49 +0100
commitc8f325a59cfc718d13a50fbc746ed9b415c25e92 (patch)
treed53fbdac9d0781e39a13b2ac6b2bd258cf3b4140 /net/ipv4/tcp_fastopen.c
parentbf29bddf0417a4783da3b24e8c9e017ac649326f (diff)
efi/fdt: Avoid FDT manipulation after ExitBootServices()
Some AArch64 UEFI implementations disable the MMU in ExitBootServices(), after which unaligned accesses to RAM are no longer supported. Commit: abfb7b686a3e ("efi/libstub/arm*: Pass latest memory map to the kernel") fixed an issue in the memory map handling of the stub FDT code, but inadvertently created an issue with such firmware, by moving some of the FDT manipulation to after the invocation of ExitBootServices(). Given that the stub's libfdt implementation uses the ordinary, accelerated string functions, which rely on hardware handling of unaligned accesses, manipulating the FDT with the MMU off may result in alignment faults. So fix the situation by moving the update_fdt_memmap() call into the callback function invoked by efi_exit_boot_services() right before it calls the ExitBootServices() UEFI service (which is arguably a better place for it anyway) Note that disabling the MMU in ExitBootServices() is not compliant with the UEFI spec, and carries great risk due to the fact that switching from cached to uncached memory accesses halfway through compiler generated code (i.e., involving a stack) can never be done in a way that is architecturally safe. Fixes: abfb7b686a3e ("efi/libstub/arm*: Pass latest memory map to the kernel") Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Tested-by: Riku Voipio <riku.voipio@linaro.org> Cc: <stable@vger.kernel.org> Cc: mark.rutland@arm.com Cc: linux-efi@vger.kernel.org Cc: matt@codeblueprint.co.uk Cc: leif.lindholm@linaro.org Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1485971102-23330-2-git-send-email-ard.biesheuvel@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'net/ipv4/tcp_fastopen.c')