From 8b18cdbfd6c7add5fb8dae5c81596c381fe6e237 Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Sun, 13 Sep 2020 12:19:25 -0700 Subject: [PATCH] capstone: Convert Makefile bits to meson bits MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit There are better ways to do this, e.g. meson cmake subproject, but that requires cmake 3.7 and some of our CI environments only provide cmake 3.5. Nor can we add a meson.build file to capstone/, because the git submodule would then always report "untracked files". Fixing that would require creating our own branch on the qemu git mirror, at which point we could just as easily create a native meson subproject. Instead, build the library via the main meson.build. This improves the current state of affairs in that we will re-link the qemu executables against a changed libcapstone.a, which we wouldn't do before-hand. In addition, the use of the configuration header file instead of command-line -DEFINES means that we will rebuild the capstone objects with changes to meson.build. Acked-by: Paolo Bonzini Reviewed-by: Alex Bennée Signed-off-by: Richard Henderson --- Makefile | 18 ++------ configure | 68 ++++------------------------ meson.build | 110 +++++++++++++++++++++++++++++++++++++++++++--- meson_options.txt | 4 ++ 4 files changed, 120 insertions(+), 80 deletions(-) diff --git a/Makefile b/Makefile index 54fc1a9d10..f27bd4b2eb 100644 --- a/Makefile +++ b/Makefile @@ -156,21 +156,11 @@ dtc/all: .git-submodule-status dtc/libfdt dtc/%: .git-submodule-status @mkdir -p $@ -# Overriding CFLAGS causes us to lose defines added in the sub-makefile. -# Not overriding CFLAGS leads to mis-matches between compilation modes. -# Therefore we replicate some of the logic in the sub-makefile. -# Remove all the extra -Warning flags that QEMU uses that Capstone doesn't; -# no need to annoy QEMU developers with such things. -CAP_CFLAGS = $(patsubst -W%,,$(CFLAGS) $(QEMU_CFLAGS)) $(CAPSTONE_CFLAGS) -CAP_CFLAGS += -DCAPSTONE_USE_SYS_DYN_MEM -CAP_CFLAGS += -DCAPSTONE_HAS_ARM -CAP_CFLAGS += -DCAPSTONE_HAS_ARM64 -CAP_CFLAGS += -DCAPSTONE_HAS_POWERPC -CAP_CFLAGS += -DCAPSTONE_HAS_X86 - +# Retain for a while so that incremental build across this patch +# does not raise an error for missing target "capstone/all", which +# comes from the saved SUBDIRS value. .PHONY: capstone/all -capstone/all: .git-submodule-status - $(call quiet-command,$(MAKE) -C $(SRC_PATH)/capstone CAPSTONE_SHARED=no BUILDDIR="$(BUILD_DIR)/capstone" CC="$(CC)" AR="$(AR)" LD="$(LD)" RANLIB="$(RANLIB)" CFLAGS="$(CAP_CFLAGS)" $(SUBDIR_MAKEFLAGS) $(BUILD_DIR)/capstone/$(LIBCAPSTONE)) +capstone/all: .PHONY: slirp/all slirp/all: .git-submodule-status diff --git a/configure b/configure index a5841241be..f46f433649 100755 --- a/configure +++ b/configure @@ -478,7 +478,7 @@ opengl="" opengl_dmabuf="no" cpuid_h="no" avx2_opt="" -capstone="" +capstone="auto" lzo="" snappy="" bzip2="" @@ -1575,11 +1575,11 @@ for opt do ;; --enable-vhost-kernel) vhost_kernel="yes" ;; - --disable-capstone) capstone="no" + --disable-capstone) capstone="disabled" ;; - --enable-capstone) capstone="yes" + --enable-capstone) capstone="enabled" ;; - --enable-capstone=git) capstone="git" + --enable-capstone=git) capstone="internal" ;; --enable-capstone=system) capstone="system" ;; @@ -5017,51 +5017,11 @@ fi # capstone case "$capstone" in - "" | yes) - if $pkg_config capstone; then - capstone=system - elif test -e "${source_path}/.git" && test $git_update = 'yes' ; then - capstone=git - elif test -e "${source_path}/capstone/Makefile" ; then - capstone=internal - elif test -z "$capstone" ; then - capstone=no - else - feature_not_found "capstone" "Install capstone devel or git submodule" - fi - ;; - - system) - if ! $pkg_config capstone; then - feature_not_found "capstone" "Install capstone devel" - fi - ;; -esac - -case "$capstone" in - git | internal) - if test "$capstone" = git; then + auto | enabled | internal) + # Simpler to always update submodule, even if not needed. + if test -e "${source_path}/.git" && test $git_update = 'yes' ; then git_submodules="${git_submodules} capstone" fi - mkdir -p capstone - if test "$mingw32" = "yes"; then - LIBCAPSTONE=capstone.lib - else - LIBCAPSTONE=libcapstone.a - fi - capstone_libs="-Lcapstone -lcapstone" - capstone_cflags="-I${source_path}/capstone/include" - ;; - - system) - capstone_libs="$($pkg_config --libs capstone)" - capstone_cflags="$($pkg_config --cflags capstone)" - ;; - - no) - ;; - *) - error_exit "Unknown state for capstone: $capstone" ;; esac @@ -7142,11 +7102,6 @@ fi if test "$ivshmem" = "yes" ; then echo "CONFIG_IVSHMEM=y" >> $config_host_mak fi -if test "$capstone" != "no" ; then - echo "CONFIG_CAPSTONE=y" >> $config_host_mak - echo "CAPSTONE_CFLAGS=$capstone_cflags" >> $config_host_mak - echo "CAPSTONE_LIBS=$capstone_libs" >> $config_host_mak -fi if test "$debug_mutex" = "yes" ; then echo "CONFIG_DEBUG_MUTEX=y" >> $config_host_mak fi @@ -7664,13 +7619,7 @@ done # for target in $targets if [ "$fdt" = "git" ]; then subdirs="$subdirs dtc" fi -if [ "$capstone" = "git" -o "$capstone" = "internal" ]; then - subdirs="$subdirs capstone" -fi echo "SUBDIRS=$subdirs" >> $config_host_mak -if test -n "$LIBCAPSTONE"; then - echo "LIBCAPSTONE=$LIBCAPSTONE" >> $config_host_mak -fi if test "$numa" = "yes"; then echo "CONFIG_NUMA=y" >> $config_host_mak @@ -7846,7 +7795,8 @@ NINJA=${ninja:-$PWD/ninjatool} $meson setup \ -Dmalloc=$malloc -Dmalloc_trim=$malloc_trim \ -Dcocoa=$cocoa -Dmpath=$mpath -Dsdl=$sdl -Dsdl_image=$sdl_image \ -Dvnc=$vnc -Dvnc_sasl=$vnc_sasl -Dvnc_jpeg=$vnc_jpeg -Dvnc_png=$vnc_png \ - -Dgettext=$gettext -Dxkbcommon=$xkbcommon -Du2f=$u2f\ + -Dgettext=$gettext -Dxkbcommon=$xkbcommon -Du2f=$u2f \ + -Dcapstone=$capstone \ $cross_arg \ "$PWD" "$source_path" diff --git a/meson.build b/meson.build index 3161c1f037..b9f6e84c2b 100644 --- a/meson.build +++ b/meson.build @@ -10,6 +10,7 @@ else keyval = import('unstable-keyval') endif ss = import('sourceset') +fs = import('fs') sh = find_program('sh') cc = meson.get_compiler('c') @@ -495,11 +496,6 @@ if 'CONFIG_USB_LIBUSB' in config_host libusb = declare_dependency(compile_args: config_host['LIBUSB_CFLAGS'].split(), link_args: config_host['LIBUSB_LIBS'].split()) endif -capstone = not_found -if 'CONFIG_CAPSTONE' in config_host - capstone = declare_dependency(compile_args: config_host['CAPSTONE_CFLAGS'].split(), - link_args: config_host['CAPSTONE_LIBS'].split()) -endif libpmem = not_found if 'CONFIG_LIBPMEM' in config_host libpmem = declare_dependency(compile_args: config_host['LIBPMEM_CFLAGS'].split(), @@ -581,7 +577,6 @@ foreach k, v: config_host config_host_data.set(k, v == 'y' ? 1 : v) endif endforeach -genh += configure_file(output: 'config-host.h', configuration: config_host_data) minikconf = find_program('scripts/minikconf.py') config_all = {} @@ -736,6 +731,107 @@ config_all += { 'CONFIG_ALL': true, } +# Submodules + +capstone = not_found +capstone_opt = get_option('capstone') +if capstone_opt in ['enabled', 'auto', 'system'] + have_internal = fs.exists(meson.current_source_dir() / 'capstone/Makefile') + capstone = dependency('capstone', static: enable_static, + method: 'pkg-config', + required: capstone_opt == 'system' or + capstone_opt == 'enabled' and not have_internal) + if capstone.found() + capstone_opt = 'system' + elif have_internal + capstone_opt = 'internal' + else + capstone_opt = 'disabled' + endif +endif +if capstone_opt == 'internal' + capstone_data = configuration_data() + capstone_data.set('CAPSTONE_USE_SYS_DYN_MEM', '1') + + capstone_files = files( + 'capstone/cs.c', + 'capstone/MCInst.c', + 'capstone/MCInstrDesc.c', + 'capstone/MCRegisterInfo.c', + 'capstone/SStream.c', + 'capstone/utils.c' + ) + + if 'CONFIG_ARM_DIS' in config_all_disas + capstone_data.set('CAPSTONE_HAS_ARM', '1') + capstone_files += files( + 'capstone/arch/ARM/ARMDisassembler.c', + 'capstone/arch/ARM/ARMInstPrinter.c', + 'capstone/arch/ARM/ARMMapping.c', + 'capstone/arch/ARM/ARMModule.c' + ) + endif + + # FIXME: This config entry currently depends on a c++ compiler. + # Which is needed for building libvixl, but not for capstone. + if 'CONFIG_ARM_A64_DIS' in config_all_disas + capstone_data.set('CAPSTONE_HAS_ARM64', '1') + capstone_files += files( + 'capstone/arch/AArch64/AArch64BaseInfo.c', + 'capstone/arch/AArch64/AArch64Disassembler.c', + 'capstone/arch/AArch64/AArch64InstPrinter.c', + 'capstone/arch/AArch64/AArch64Mapping.c', + 'capstone/arch/AArch64/AArch64Module.c' + ) + endif + + if 'CONFIG_PPC_DIS' in config_all_disas + capstone_data.set('CAPSTONE_HAS_POWERPC', '1') + capstone_files += files( + 'capstone/arch/PowerPC/PPCDisassembler.c', + 'capstone/arch/PowerPC/PPCInstPrinter.c', + 'capstone/arch/PowerPC/PPCMapping.c', + 'capstone/arch/PowerPC/PPCModule.c' + ) + endif + + if 'CONFIG_I386_DIS' in config_all_disas + capstone_data.set('CAPSTONE_HAS_X86', 1) + capstone_files += files( + 'capstone/arch/X86/X86Disassembler.c', + 'capstone/arch/X86/X86DisassemblerDecoder.c', + 'capstone/arch/X86/X86ATTInstPrinter.c', + 'capstone/arch/X86/X86IntelInstPrinter.c', + 'capstone/arch/X86/X86Mapping.c', + 'capstone/arch/X86/X86Module.c' + ) + endif + + configure_file(output: 'capstone-defs.h', configuration: capstone_data) + + capstone_cargs = [ + # FIXME: There does not seem to be a way to completely replace the c_args + # that come from add_project_arguments() -- we can only add to them. + # So: disable all warnings with a big hammer. + '-Wno-error', '-w', + + # Include all configuration defines via a header file, which will wind up + # as a dependency on the object file, and thus changes here will result + # in a rebuild. + '-include', 'capstone-defs.h' + ] + + libcapstone = static_library('capstone', + sources: capstone_files, + c_args: capstone_cargs, + include_directories: 'capstone/include') + capstone = declare_dependency(link_with: libcapstone, + include_directories: 'capstone/include') +endif +config_host_data.set('CONFIG_CAPSTONE', capstone.found()) + +genh += configure_file(output: 'config-host.h', configuration: config_host_data) + # Generators hxtool = find_program('scripts/hxtool') @@ -1566,7 +1662,7 @@ summary_info += {'vvfat support': config_host.has_key('CONFIG_VVFAT')} summary_info += {'qed support': config_host.has_key('CONFIG_QED')} summary_info += {'parallels support': config_host.has_key('CONFIG_PARALLELS')} summary_info += {'sheepdog support': config_host.has_key('CONFIG_SHEEPDOG')} -summary_info += {'capstone': config_host.has_key('CONFIG_CAPSTONE')} +summary_info += {'capstone': capstone_opt == 'disabled' ? false : capstone_opt} summary_info += {'libpmem support': config_host.has_key('CONFIG_LIBPMEM')} summary_info += {'libdaxctl support': config_host.has_key('CONFIG_LIBDAXCTL')} summary_info += {'libudev': libudev.found()} diff --git a/meson_options.txt b/meson_options.txt index 46ea1d889a..a1228d29a9 100644 --- a/meson_options.txt +++ b/meson_options.txt @@ -31,3 +31,7 @@ option('vnc_sasl', type : 'feature', value : 'auto', description: 'SASL authentication for VNC server') option('xkbcommon', type : 'feature', value : 'auto', description: 'xkbcommon support') + +option('capstone', type: 'combo', value: 'auto', + choices: ['disabled', 'enabled', 'auto', 'system', 'internal'], + description: 'Whether and how to find the capstone library')