From 7a919df564980595e861155ae48691045b54258a Mon Sep 17 00:00:00 2001 From: =?utf8?q?Andreas=20Bie=C3=9Fmann?= Date: Mon, 9 Feb 2015 00:06:10 +0100 Subject: [PATCH] tools/imagetool: remove linker script MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Commit a93648d197df48fa46dd55f925ff70468bd81c71 introduced linker generated lists for imagetool which is the base for some host tools (mkimage, dumpimage, et al.). Unfortunately some host tool chains do not support the used type of linker scripts. Therefore this commit broke these host-tools for them, namely FreeBSD and Darwin (OS/X). This commit tries to fix this. In order to have a clean distinction between host and embedded code space we need to introduce our own linker generated list instead of re-using the available linker_lists.h provided functionality. So we copy the implementation used in linux kernel script/mod/file2alias.c which has the very same problem (cause it is a host tool). This code also comes with an abstraction for Mach-O binary format used in Darwin systems. Signed-off-by: Andreas Bießmann Cc: Guilherme Maciel Ferreira --- Makefile | 5 ++++ tools/Makefile | 2 -- tools/imagetool.c | 35 ++++++++++++++-------------- tools/imagetool.h | 56 ++++++++++++++++++++++++++++++++++++--------- tools/imagetool.lds | 24 ------------------- 5 files changed, 67 insertions(+), 55 deletions(-) delete mode 100644 tools/imagetool.lds diff --git a/Makefile b/Makefile index e0d9fb89b2..72fedc22dd 100644 --- a/Makefile +++ b/Makefile @@ -281,6 +281,11 @@ os_x_before = $(shell if [ $(DARWIN_MAJOR_VERSION) -le $(1) -a \ HOSTCC = $(call os_x_before, 10, 5, "cc", "gcc") HOSTCFLAGS += $(call os_x_before, 10, 4, "-traditional-cpp") HOSTLDFLAGS += $(call os_x_before, 10, 5, "-multiply_defined suppress") + +# since Lion (10.7) ASLR is on by default, but we use linker generated lists +# in some host tools which is a problem then ... so disable ASLR for these +# tools +HOSTLDFLAGS += $(call os_x_before, 10, 7, "", "-Xlinker -no_pie") endif # Decide whether to build built-in, modular, or both. diff --git a/tools/Makefile b/tools/Makefile index 51c1c86e48..fb0033d6be 100644 --- a/tools/Makefile +++ b/tools/Makefile @@ -128,8 +128,6 @@ HOSTLOADLIBES_dumpimage := $(HOSTLOADLIBES_mkimage) HOSTLOADLIBES_fit_info := $(HOSTLOADLIBES_mkimage) HOSTLOADLIBES_fit_check_sign := $(HOSTLOADLIBES_mkimage) -HOSTLDFLAGS += -T $(srctree)/tools/imagetool.lds - hostprogs-$(CONFIG_EXYNOS5250) += mkexynosspl hostprogs-$(CONFIG_EXYNOS5420) += mkexynosspl HOSTCFLAGS_mkexynosspl.o := -pedantic diff --git a/tools/imagetool.c b/tools/imagetool.c index 148e4662b7..4b0b73db52 100644 --- a/tools/imagetool.c +++ b/tools/imagetool.c @@ -12,16 +12,16 @@ struct image_type_params *imagetool_get_type(int type) { - struct image_type_params *curr; - struct image_type_params *start = ll_entry_start( - struct image_type_params, image_type); - struct image_type_params *end = ll_entry_end( - struct image_type_params, image_type); + struct image_type_params **curr; + INIT_SECTION(image_type); + + struct image_type_params **start = __start_image_type; + struct image_type_params **end = __stop_image_type; for (curr = start; curr != end; curr++) { - if (curr->check_image_type) { - if (!curr->check_image_type(type)) - return curr; + if ((*curr)->check_image_type) { + if (!(*curr)->check_image_type(type)) + return *curr; } } return NULL; @@ -34,16 +34,15 @@ int imagetool_verify_print_header( struct image_tool_params *params) { int retval = -1; - struct image_type_params *curr; + struct image_type_params **curr; + INIT_SECTION(image_type); - struct image_type_params *start = ll_entry_start( - struct image_type_params, image_type); - struct image_type_params *end = ll_entry_end( - struct image_type_params, image_type); + struct image_type_params **start = __start_image_type; + struct image_type_params **end = __stop_image_type; for (curr = start; curr != end; curr++) { - if (curr->verify_header) { - retval = curr->verify_header((unsigned char *)ptr, + if ((*curr)->verify_header) { + retval = (*curr)->verify_header((unsigned char *)ptr, sbuf->st_size, params); if (retval == 0) { @@ -51,12 +50,12 @@ int imagetool_verify_print_header( * Print the image information if verify is * successful */ - if (curr->print_header) { - curr->print_header(ptr); + if ((*curr)->print_header) { + (*curr)->print_header(ptr); } else { fprintf(stderr, "%s: print_header undefined for %s\n", - params->cmdname, curr->name); + params->cmdname, (*curr)->name); } break; } diff --git a/tools/imagetool.h b/tools/imagetool.h index f35dec71c7..3e15b4e22b 100644 --- a/tools/imagetool.h +++ b/tools/imagetool.h @@ -20,15 +20,6 @@ #include #include -/* define __KERNEL__ in order to get the definitions - * required by the linker list. This is probably not - * the best way to do this */ -#ifndef __KERNEL__ -#define __KERNEL__ -#include -#undef __KERNEL__ -#endif /* __KERNEL__ */ - #include "fdt_host.h" #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) @@ -194,6 +185,46 @@ int imagetool_save_subimage( void pbl_load_uboot(int fd, struct image_tool_params *mparams); +#define ___cat(a, b) a ## b +#define __cat(a, b) ___cat(a, b) + +/* we need some special handling for this host tool running eventually on + * Darwin. The Mach-O section handling is a bit different than ELF section + * handling. The differnces in detail are: + * a) we have segments which have sections + * b) we need a API call to get the respective section symbols */ +#if defined(__MACH__) +#include + +#define INIT_SECTION(name) do { \ + unsigned long name ## _len; \ + char *__cat(pstart_, name) = getsectdata("__TEXT", \ + #name, &__cat(name, _len)); \ + char *__cat(pstop_, name) = __cat(pstart_, name) + \ + __cat(name, _len); \ + __cat(__start_, name) = (void *)__cat(pstart_, name); \ + __cat(__stop_, name) = (void *)__cat(pstop_, name); \ + } while (0) +#define SECTION(name) __attribute__((section("__TEXT, " #name))) + +struct image_type_params **__start_image_type, **__stop_image_type; +#else +#define INIT_SECTION(name) /* no-op for ELF */ +#define SECTION(name) __attribute__((section(#name))) + +/* We construct a table of pointers in an ELF section (pointers generally + * go unpadded by gcc). ld creates boundary syms for us. */ +extern struct image_type_params *__start_image_type[], *__stop_image_type[]; +#endif /* __MACH__ */ + +#if !defined(__used) +# if __GNUC__ == 3 && __GNUC_MINOR__ < 3 +# define __used __attribute__((__unused__)) +# else +# define __used __attribute__((__used__)) +# endif +#endif + #define U_BOOT_IMAGE_TYPE( \ _id, \ _name, \ @@ -208,7 +239,8 @@ void pbl_load_uboot(int fd, struct image_tool_params *mparams); _fflag_handle, \ _vrec_header \ ) \ - ll_entry_declare(struct image_type_params, _id, image_type) = { \ + static struct image_type_params __cat(image_type_, _id) = \ + { \ .name = _name, \ .header_size = _header_size, \ .hdr = _header, \ @@ -220,6 +252,8 @@ void pbl_load_uboot(int fd, struct image_tool_params *mparams); .check_image_type = _check_image_type, \ .fflag_handle = _fflag_handle, \ .vrec_header = _vrec_header \ - } + }; \ + static struct image_type_params *SECTION(image_type) __used \ + __cat(image_type_ptr_, _id) = &__cat(image_type_, _id) #endif /* _IMAGETOOL_H_ */ diff --git a/tools/imagetool.lds b/tools/imagetool.lds deleted file mode 100644 index 7e92b4ac66..0000000000 --- a/tools/imagetool.lds +++ /dev/null @@ -1,24 +0,0 @@ -/* - * Copyright (c) 2011-2012 The Chromium OS Authors. - * Use of this source code is governed by a BSD-style license that can be - * found in the LICENSE file. - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -SECTIONS -{ - - . = ALIGN(4); - .u_boot_list : { - KEEP(*(SORT(.u_boot_list*))); - } - - __u_boot_sandbox_option_start = .; - _u_boot_sandbox_getopt : { *(.u_boot_sandbox_getopt) } - __u_boot_sandbox_option_end = .; - - __bss_start = .; -} - -INSERT BEFORE .data; -- 2.39.2