/* * Copyright 2007 Jon Loeliger, Freescale Semiconductor, Inc. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of the * License, or (at your option) any later version. * * This program 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 * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 * USA */ #ifndef _SRCPOS_H_ #define _SRCPOS_H_ #include #include struct srcfile_state { FILE *f; char *name; char *dir; int lineno, colno; struct srcfile_state *prev; }; extern FILE *depfile; /* = NULL */ extern struct srcfile_state *current_srcfile; /* = NULL */ /** * Open a source file. * * If the source file is a relative pathname, then it is searched for in the * current directory (the directory of the last source file read) and after * that in the search path. * * We work through the search path in order from the first path specified to * the last. * * If the file is not found, then this function does not return, but calls * die(). * * @param fname Filename to search * @param fullnamep If non-NULL, it is set to the allocated filename of the * file that was opened. The caller is then responsible * for freeing the pointer. * @return pointer to opened FILE */ FILE *srcfile_relative_open(const char *fname, char **fullnamep); void srcfile_push(const char *fname); bool srcfile_pop(void); /** * Add a new directory to the search path for input files * * The new path is added at the end of the list. * * @param dirname Directory to add */ void srcfile_add_search_path(const char *dirname); struct srcpos { int first_line; int first_column; int last_line; int last_column; struct srcfile_state *file; }; #define YYLTYPE struct srcpos #define YYLLOC_DEFAULT(Current, Rhs, N) \ do { \ if (N) { \ (Current).first_line = YYRHSLOC(Rhs, 1).first_line; \ (Current).first_column = YYRHSLOC(Rhs, 1).first_column; \ (Current).last_line = YYRHSLOC(Rhs, N).last_line; \ (Current).last_column = YYRHSLOC (Rhs, N).last_column; \ (Current).file = YYRHSLOC(Rhs, N).file; \ } else { \ (Current).first_line = (Current).last_line = \ YYRHSLOC(Rhs, 0).last_line; \ (Current).first_column = (Current).last_column = \ YYRHSLOC(Rhs, 0).last_column; \ (Current).file = YYRHSLOC (Rhs, 0).file; \ } \ } while (0) /* * Fictional source position used for IR nodes that are * created without otherwise knowing a true source position. * For example,constant definitions from the command line. */ extern struct srcpos srcpos_empty; extern void srcpos_update(struct srcpos *pos, const char *text, int len); extern struct srcpos *srcpos_copy(struct srcpos *pos); extern char *srcpos_string(struct srcpos *pos); extern void srcpos_dump(struct srcpos *pos); extern void srcpos_verror(struct srcpos *pos, const char *prefix, const char *fmt, va_list va) __attribute__((format(printf, 3, 0))); extern void srcpos_error(struct srcpos *pos, const char *prefix, const char *fmt, ...) __attribute__((format(printf, 3, 4))); extern void srcpos_set_line(char *f, int l); #endif /* _SRCPOS_H_ */ >/test-libunwind-debug-frame-aarch64.c
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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 /tools/build/feature/test-libunwind-debug-frame-aarch64.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 'tools/build/feature/test-libunwind-debug-frame-aarch64.c')