gcc-arm-linux-gnu和 arm-none-eabi

 

[root@bogon gcc-arm-embedded]#  yum install gcc-arm-linux-gnu
Loaded plugins: fastestmirror, langpacks
Repository epel is listed more than once in the configuration
Repository epel-debuginfo is listed more than once in the configuration
Repository epel-source is listed more than once in the configuration
Loading mirror speeds from cached hostfile
 * centos-qemu-ev: mirror-hk.koddos.net
 * epel: mirror.sjtu.edu.cn
Resolving Dependencies
--> Running transaction check
---> Package gcc-arm-linux-gnu.aarch64 0:4.8.5-16.el7.1 will be installed
--> Processing Dependency: cross-gcc-common = 4.8.5-16.el7.1 for package: gcc-arm-linux-gnu-4.8.5-16.el7.1.aarch64
--> Processing Dependency: binutils-arm-linux-gnu >= 2.25-1 for package: gcc-arm-linux-gnu-4.8.5-16.el7.1.aarch64
--> Running transaction check
---> Package binutils-arm-linux-gnu.aarch64 0:2.27-9.el7.1 will be installed
--> Processing Dependency: cross-binutils-common = 2.27-9.el7.1 for package: binutils-arm-linux-gnu-2.27-9.el7.1.aarch64
---> Package cross-gcc-common.noarch 0:4.8.5-16.el7.1 will be installed
--> Running transaction check
---> Package cross-binutils-common.noarch 0:2.27-9.el7.1 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

============================================================
 Package                Arch    Version          Repository
                                                       Size
============================================================
Installing:
 gcc-arm-linux-gnu      aarch64 4.8.5-16.el7.1   epel 8.8 M
Installing for dependencies:
 binutils-arm-linux-gnu aarch64 2.27-9.el7.1     epel 1.9 M
 cross-binutils-common  noarch  2.27-9.el7.1     epel 1.7 M
 cross-gcc-common       noarch  4.8.5-16.el7.1   epel 1.9 M

Transaction Summary
============================================================
Install  1 Package (+3 Dependent packages)

Total download size: 14 M
Installed size: 62 M
Is this ok [y/d/N]: y
Downloading packages:
(1/4): cross-gcc-common-4.8.5-16.el7.1 | 1.9 MB   00:05     
(2/4): cross-binutils-common-2.27-9.el | 1.7 MB   00:06     
(3/4): binutils-arm-linux-gnu-2.27-9.e | 1.9 MB   00:07     
(4/4): gcc-arm-linux-gnu-4.8.5-16.el7. | 8.8 MB   00:09     
------------------------------------------------------------
Total                          1.5 MB/s |  14 MB  00:09     
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : cross-binutils-common-2.27-9.el7.1.noa   1/4 
  Installing : binutils-arm-linux-gnu-2.27-9.el7.1.aa   2/4 
  Installing : cross-gcc-common-4.8.5-16.el7.1.noarch   3/4 
  Installing : gcc-arm-linux-gnu-4.8.5-16.el7.1.aarch   4/4 
  Verifying  : cross-gcc-common-4.8.5-16.el7.1.noarch   1/4 
  Verifying  : gcc-arm-linux-gnu-4.8.5-16.el7.1.aarch   2/4 
  Verifying  : binutils-arm-linux-gnu-2.27-9.el7.1.aa   3/4 
  Verifying  : cross-binutils-common-2.27-9.el7.1.noa   4/4 

Installed:
  gcc-arm-linux-gnu.aarch64 0:4.8.5-16.el7.1                

Dependency Installed:
  binutils-arm-linux-gnu.aarch64 0:2.27-9.el7.1             
  cross-binutils-common.noarch 0:2.27-9.el7.1               
  cross-gcc-common.noarch 0:4.8.5-16.el7.1                  

Complete!
[root@bogon gcc-arm-embedded]# arm-none-eabi-gcc -v
bash: arm-none-eabi-gcc: command not found...
[root@bogon gcc-arm-embedded]# gcc
gcc         gcc-ar      gcc-nm      gcc-ranlib
[root@bogon gcc-arm-embedded]# gcc-arm
bash: gcc-arm: command not found...
Similar command is: 'gcc-ar'
[root@bogon gcc-arm-embedded]# gcc-
gcc-ar      gcc-nm      gcc-ranlib  
[root@bogon gcc-arm-embedded]# gcc-
gcc-ar      gcc-nm      gcc-ranlib  
[root@bogon gcc-arm-embedded]# gcc-
gcc-ar      gcc-nm      gcc-ranlib  
[root@bogon gcc-arm-embedded]# arm-linux-gnu-
arm-linux-gnu-addr2line  arm-linux-gnu-ld.bfd
arm-linux-gnu-ar         arm-linux-gnu-nm
arm-linux-gnu-as         arm-linux-gnu-objcopy
arm-linux-gnu-c++filt    arm-linux-gnu-objdump
arm-linux-gnu-cpp        arm-linux-gnu-ranlib
arm-linux-gnu-elfedit    arm-linux-gnu-readelf
arm-linux-gnu-gcc        arm-linux-gnu-size
arm-linux-gnu-gcov       arm-linux-gnu-strings
arm-linux-gnu-gprof      arm-linux-gnu-strip
arm-linux-gnu-ld         
[root@bogon gcc-arm-embedded]# arm-linux-gnu-

 

 

arm-none-eabi-   

下载链接 https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/gnu-a/downloads

 

 

 

[root@bogon gcc-arm-embedded]# wget https://developer.arm.com/-/media/Files/downloads/gnu-a/10.3-2021.07/binrel/gcc-arm-10.3-2021.07-aarch64-arm-none-eabi.tar.xz
--2022-02-15 16:22:30--  https://developer.arm.com/-/media/Files/downloads/gnu-a/10.3-2021.07/binrel/gcc-arm-10.3-2021.07-aarch64-arm-none-eabi.tar.xz
Resolving developer.arm.com (developer.arm.com)... 23.76.74.223
Connecting to developer.arm.com (developer.arm.com)|23.76.74.223|:443... connected.
HTTP request sent, awaiting response... 302 Moved Temporarily
Location: https://armkeil.blob.core.windows.net/developer/Files/downloads/gnu-a/10.3-2021.07/binrel/gcc-arm-10.3-2021.07-aarch64-arm-none-eabi.tar.xz [following]
--2022-02-15 16:22:35--  https://armkeil.blob.core.windows.net/developer/Files/downloads/gnu-a/10.3-2021.07/binrel/gcc-arm-10.3-2021.07-aarch64-arm-none-eabi.tar.xz

 

[root@bogon gcc-arm-embedded]# find ./ -name '*gcc'
./gcc-arm-10.3-2021.07-aarch64-arm-none-eabi/share/doc/gcc
./gcc-arm-10.3-2021.07-aarch64-arm-none-eabi/bin/arm-none-eabi-gcc
./gcc-arm-10.3-2021.07-aarch64-arm-none-eabi/lib/gcc
./gcc-arm-10.3-2021.07-aarch64-arm-none-eabi/libexec/gcc
[root@bogon gcc-arm-embedded]# ./gcc-arm-10.3-2021.07-aarch64-arm-none-eabi/bin/arm-none-eabi-gcc -v
Using built-in specs.
COLLECT_GCC=./gcc-arm-10.3-2021.07-aarch64-arm-none-eabi/bin/arm-none-eabi-gcc
COLLECT_LTO_WRAPPER=/data1/gcc-arm-embedded/gcc-arm-10.3-2021.07-aarch64-arm-none-eabi/bin/../libexec/gcc/arm-none-eabi/10.3.1/lto-wrapper
Target: arm-none-eabi
Configured with: /data/jenkins/workspace/GNU-toolchain/arm-10/src/gcc/configure --target=arm-none-eabi --prefix=/data/jenkins/workspace/GNU-toolchain/arm-10/build-arm-none-eabi/install// --with-gmp=/data/jenkins/workspace/GNU-toolchain/arm-10/build-arm-none-eabi/host-tools --with-mpfr=/data/jenkins/workspace/GNU-toolchain/arm-10/build-arm-none-eabi/host-tools --with-mpc=/data/jenkins/workspace/GNU-toolchain/arm-10/build-arm-none-eabi/host-tools --with-isl=/data/jenkins/workspace/GNU-toolchain/arm-10/build-arm-none-eabi/host-tools --disable-shared --disable-nls --disable-threads --disable-tls --enable-checking=release --enable-languages=c,c++,fortran --with-newlib --with-multilib-list=aprofile --with-pkgversion='GNU Toolchain for the A-profile Architecture 10.3-2021.07 (arm-10.29)' --with-bugurl=https://bugs.linaro.org/
Thread model: single
Supported LTO compression algorithms: zlib
gcc version 10.3.1 20210621 (GNU Toolchain for the A-profile Architecture 10.3-2021.07 (arm-10.29)) 
[root@bogon gcc-arm-embedded]# 

 

export PATH="/data1/gcc-arm-embedded/gcc-arm-10.3-2021.07-aarch64-arm-none-eabi/bin:$PATH"

 

arm-none-eabi-ld -v
arm-none-eabi-ld: /lib64/libc.so.6: version `GLIBC_2.27' not found (required by arm-none-eabi-ld)

 

strings /lib64/libc.so.6 | grep GLIBC 
GLIBC_2.17
GLIBC_2.18
GLIBC_PRIVATE

 

 

uname -a
Linux centos7 4.14.0-115.el7a.0.1.aarch64 #1 SMP Sun Nov 25 20:54:21 UTC 2018 aarch64 aarch64 aarch64 GNU/Linux

 

 

 

下载glibc

 wget https://ftp.gnu.org/gnu/glibc/glibc-2.27.tar.xz

 1035  cd glibc-2.27
 1036  mkdir build
 1037  cd build/
 1038  ../configure --prefix=/usr --disable-profile --enable-add-ons --with-headers=/usr/include --with-binutils=/usr/bin

 

 

 

checking if gcc -B/usr/bin/ is sufficient to build libc... no
checking for nm... nm
checking for python3... python3
configure: error: 
*** These critical programs are missing or too old: compiler
*** Check the INSTALL file for required versions.

 

arm社区

https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/gnu-rm/downloads

 

ubuntu

 uname -a
Linux ubuntu 5.0.0-23-generic #24~18.04.1-Ubuntu SMP Mon Jul 29 16:10:24 UTC 2019 aarch64 aarch64 aarch64 GNU/Linux

 

ldd --version
ldd (Ubuntu GLIBC 2.27-3ubuntu1) 2.27
Copyright (C) 2018 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Written by Roland McGrath and Ulrich Drepper.

 

 

gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/aarch64-linux-gnu/5/lto-wrapper
Target: aarch64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro 5.5.0-12ubuntu1' --with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs --enable-languages=c,ada,c++,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-5 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-libquadmath --enable-plugin --enable-default-pie --with-system-zlib --enable-multiarch --enable-fix-cortex-a53-843419 --disable-werror --enable-checking=release --build=aarch64-linux-gnu --host=aarch64-linux-gnu --target=aarch64-linux-gnu
Thread model: posix
gcc version 5.5.0 20171010 (Ubuntu/Linaro 5.5.0-12ubuntu1) 

 

 

 apt-get install gcc-arm-none-eabi

 

root@ubuntu:~# apt-get install gcc-arm-none-eabi
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages were automatically installed and are no longer required:
  adwaita-icon-theme at-spi2-core augeas-lenses cmake-data db-util
  db5.3-util dconf-gsettings-backend dconf-service exfat-fuse exfat-utils
  fontconfig fonts-droid-fallback fonts-noto-mono genisoimage ghostscript
  gir1.2-appindicator3-0.1 gir1.2-atk-1.0 gir1.2-freedesktop
  gir1.2-gdkpixbuf-2.0 gir1.2-gtk-3.0 gir1.2-gtk-vnc-2.0
  gir1.2-libosinfo-1.0 gir1.2-pango-1.0 gir1.2-spiceclientglib-2.0
  gir1.2-spiceclientgtk-3.0 gir1.2-vte-2.91 glib-networking
  glib-networking-common glib-networking-services golang-1.10-go
  golang-1.10-src golang-src gsettings-desktop-schemas gsfonts
  gstreamer1.0-plugins-base gtk-update-icon-cache hfsplus
  hicolor-icon-theme humanity-icon-theme icoutils
  ipxe-qemu-256k-compat-efi-roms ldmtool libappindicator3-1 libarchive13
  libasound2 libasound2-data libasyncns0 libatk-bridge2.0-0 libatk1.0-0
  libatk1.0-data libatspi2.0-0 libaugeas0 libauthen-sasl-perl
  libavahi-client3 libavahi-common-data libavahi-common3 libbfio1
  libbluetooth3 libbrlapi0.6 libcaca0 libcacard0 libcdparanoia0 libcolord2
  libconfig9 libcroco3 libcups2 libcupsfilters1 libcupsimage2
  libdata-dump-perl libdate-manip-perl libdatrie1 libdbusmenu-glib4
  libdbusmenu-gtk3-4 libdconf1 libencode-locale-perl libepoxy0 libewf2
  libfile-listing-perl libflac8 libfont-afm-perl libgdk-pixbuf2.0-0
  libgdk-pixbuf2.0-bin libgdk-pixbuf2.0-common libgovirt-common libgovirt2
  libgs9 libgs9-common libgstreamer-plugins-base1.0-0 libgstreamer1.0-0
  libgtk-3-0 libgtk-3-bin libgtk-3-common libgtk-vnc-2.0-0 libgvnc-1.0-0
  libhfsp0 libhivex0 libhtml-form-perl libhtml-format-perl
  libhtml-parser-perl libhtml-tagset-perl libhtml-tree-perl
  libhttp-cookies-perl libhttp-daemon-perl libhttp-date-perl
  libhttp-message-perl libhttp-negotiate-perl libijs-0.35 libindicator3-7
  libintl-perl libintl-xs-perl libio-html-perl libio-socket-ssl-perl
  libiscsi7 libjbig2dec0 libjson-glib-1.0-0 libjson-glib-1.0-common
  libjsoncpp1 liblcms2-2 libldm-1.0-0 liblwp-mediatypes-perl
  liblwp-protocol-https-perl libmailtools-perl libnet-http-perl
  libnet-smtp-ssl-perl libnet-ssleay-perl libnetcf1 libnetpbm10 libogg0
  libopus0 liborc-0.4-0 libosinfo-1.0-0 libpango-1.0-0 libpangocairo-1.0-0
  libpangoft2-1.0-0 libpangoxft-1.0-0 libpaper-utils libpaper1
  libphodav-2.0-0 libphodav-2.0-common libproxy1v5 libpulse-mainloop-glib0
  libpulse0 librdmacm1 librest-0.7-0 librhash0 librsvg2-2 librsvg2-common
  libsdl1.2debian libsndfile1 libsoup-gnome2.4-1 libsoup2.4-1
  libspice-client-glib-2.0-8 libspice-client-gtk-3.0-5
  libstring-shellquote-perl libthai-data libthai0 libtheora0
  libtimedate-perl libtry-tiny-perl liburi-perl libusbredirhost1
  libusbredirparser1 libvisual-0.4-0 libvorbis0a libvorbisenc2
  libvte-2.91-0 libvte-2.91-common libwin-hivex-perl libwww-perl
  libwww-robotrules-perl libxcomposite1 libxcursor1 libxen-4.9
  libxenstore3.0 libxft2 libxi6 libxinerama1 libxkbcommon0
  libxml-parser-perl libxml-xpath-perl libxml2-utils libxrandr2 libxtst6
  libyajl2 lzop mtools netpbm osinfo-db perl-openssl-defaults poppler-data
  python-certifi python-chardet python-ipaddr python-libxml2
  python-openssl python-requests python-urllib3 reiserfsprogs scrub
  sharutils spice-client-glib-usb-acl-helper supermin ubuntu-mono
  x11-common zerofree
Use 'apt autoremove' to remove them.
The following additional packages will be installed:
  binutils-arm-none-eabi libnewlib-arm-none-eabi libnewlib-dev
  libstdc++-arm-none-eabi-newlib
Suggested packages:
  libnewlib-doc
The following NEW packages will be installed:
  binutils-arm-none-eabi gcc-arm-none-eabi libnewlib-arm-none-eabi
  libnewlib-dev libstdc++-arm-none-eabi-newlib
0 upgraded, 5 newly installed, 0 to remove and 296 not upgraded.
Need to get 119 MB of archives.
After this operation, 1,123 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 http://hk.ports.ubuntu.com/ubuntu-ports bionic/universe arm64 binutils-arm-none-eabi arm64 2.27-9ubuntu1+9 [1,873 kB]
Get:2 http://hk.ports.ubuntu.com/ubuntu-ports bionic/universe arm64 gcc-arm-none-eabi arm64 15:6.3.1+svn253039-1build1 [23.2 MB]
Get:3 http://hk.ports.ubuntu.com/ubuntu-ports bionic-updates/universe arm64 libnewlib-dev all 2.4.0.20160527-3ubuntu0.1 [108 kB]
Get:4 http://hk.ports.ubuntu.com/ubuntu-ports bionic-updates/universe arm64 libnewlib-arm-none-eabi all 2.4.0.20160527-3ubuntu0.1 [19.1 MB]
Get:5 http://hk.ports.ubuntu.com/ubuntu-ports bionic/universe arm64 libstdc++-arm-none-eabi-newlib all 15:6.3.1+svn253039-1+10 [74.8 MB]
Fetched 119 MB in 35s (3,415 kB/s)                                         
Selecting previously unselected package binutils-arm-none-eabi.
(Reading database ... 146910 files and directories currently installed.)
Preparing to unpack .../binutils-arm-none-eabi_2.27-9ubuntu1+9_arm64.deb ...
Unpacking binutils-arm-none-eabi (2.27-9ubuntu1+9) ...
Selecting previously unselected package gcc-arm-none-eabi.
Preparing to unpack .../gcc-arm-none-eabi_15%3a6.3.1+svn253039-1build1_arm64.deb ...
Unpacking gcc-arm-none-eabi (15:6.3.1+svn253039-1build1) ...
Selecting previously unselected package libnewlib-dev.
Preparing to unpack .../libnewlib-dev_2.4.0.20160527-3ubuntu0.1_all.deb ...
Unpacking libnewlib-dev (2.4.0.20160527-3ubuntu0.1) ...
Selecting previously unselected package libnewlib-arm-none-eabi.
Preparing to unpack .../libnewlib-arm-none-eabi_2.4.0.20160527-3ubuntu0.1_all.deb ...
Unpacking libnewlib-arm-none-eabi (2.4.0.20160527-3ubuntu0.1) ...
Selecting previously unselected package libstdc++-arm-none-eabi-newlib.
Preparing to unpack .../libstdc++-arm-none-eabi-newlib_15%3a6.3.1+svn253039-1+10_all.deb ...
Unpacking libstdc++-arm-none-eabi-newlib (15:6.3.1+svn253039-1+10) ...
Processing triggers for libc-bin (2.27-3ubuntu1) ...
Setting up libnewlib-dev (2.4.0.20160527-3ubuntu0.1) ...
Setting up binutils-arm-none-eabi (2.27-9ubuntu1+9) ...
Processing triggers for man-db (2.8.3-2ubuntu0.1) ...
Setting up libnewlib-arm-none-eabi (2.4.0.20160527-3ubuntu0.1) ...
Setting up libstdc++-arm-none-eabi-newlib (15:6.3.1+svn253039-1+10) ...
Setting up gcc-arm-none-eabi (15:6.3.1+svn253039-1build1) ...
Processing triggers for libc-bin (2.27-3ubuntu1) ...
root@ubuntu:~# arm-none-eabi-gcc -v
Using built-in specs.
COLLECT_GCC=arm-none-eabi-gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/arm-none-eabi/6.3.1/lto-wrapper
Target: arm-none-eabi
Configured with: ../src/configure --build=aarch64-linux-gnu --prefix=/usr --includedir='/usr/lib/include' --mandir='/usr/lib/share/man' --infodir='/usr/lib/share/info' --sysconfdir=/etc --localstatedir=/var --disable-silent-rules --libdir='/usr/lib/lib/aarch64-linux-gnu' --libexecdir='/usr/lib/lib/aarch64-linux-gnu' --disable-maintainer-mode --disable-dependency-tracking --mandir=/usr/share/man --enable-languages=c,c++,lto --enable-multilib --disable-decimal-float --disable-libffi --disable-libgomp --disable-libmudflap --disable-libquadmath --disable-libssp --disable-libstdcxx-pch --disable-nls --disable-shared --disable-threads --disable-tls --build=aarch64-linux-gnu --target=arm-none-eabi --with-system-zlib --with-gnu-as --with-gnu-ld --with-pkgversion=15:6.3.1+svn253039-1build1 --without-included-gettext --prefix=/usr/lib --infodir=/usr/share/doc/gcc-arm-none-eabi/info --htmldir=/usr/share/doc/gcc-arm-none-eabi/html --pdfdir=/usr/share/doc/gcc-arm-none-eabi/pdf --bindir=/usr/bin --libexecdir=/usr/lib --libdir=/usr/lib --disable-libstdc++-v3 --host=aarch64-linux-gnu --with-headers=no --without-newlib --with-multilib-list=rmprofile CFLAGS='-g -O2 -fdebug-prefix-map=/build/gcc-arm-none-eabi-lUs__4/gcc-arm-none-eabi-6.3.1+svn253039=. -fstack-protector-strong' CPPFLAGS='-Wdate-time -D_FORTIFY_SOURCE=2' CXXFLAGS='-g -O2 -fdebug-prefix-map=/build/gcc-arm-none-eabi-lUs__4/gcc-arm-none-eabi-6.3.1+svn253039=. -fstack-protector-strong' FCFLAGS='-g -O2 -fdebug-prefix-map=/build/gcc-arm-none-eabi-lUs__4/gcc-arm-none-eabi-6.3.1+svn253039=. -fstack-protector-strong' FFLAGS='-g -O2 -fdebug-prefix-map=/build/gcc-arm-none-eabi-lUs__4/gcc-arm-none-eabi-6.3.1+svn253039=. -fstack-protector-strong' GCJFLAGS='-g -O2 -fdebug-prefix-map=/build/gcc-arm-none-eabi-lUs__4/gcc-arm-none-eabi-6.3.1+svn253039=. -fstack-protector-strong' LDFLAGS='-Wl,-Bsymbolic-functions -Wl,-z,relro' OBJCFLAGS='-g -O2 -fdebug-prefix-map=/build/gcc-arm-none-eabi-lUs__4/gcc-arm-none-eabi-6.3.1+svn253039=. -fstack-protector-strong' OBJCXXFLAGS='-g -O2 -fdebug-prefix-map=/build/gcc-arm-none-eabi-lUs__4/gcc-arm-none-eabi-6.3.1+svn253039=. -fstack-protector-strong' INHIBIT_LIBC_CFLAGS=-DUSE_TM_CLONE_REGISTRY=0 AR_FOR_TARGET=arm-none-eabi-ar AS_FOR_TARGET=arm-none-eabi-as LD_FOR_TARGET=arm-none-eabi-ld NM_FOR_TARGET=arm-none-eabi-nm OBJDUMP_FOR_TARGET=arm-none-eabi-objdump RANLIB_FOR_TARGET=arm-none-eabi-ranlib READELF_FOR_TARGET=arm-none-eabi-readelf STRIP_FOR_TARGET=arm-none-eabi-strip
Thread model: single
gcc version 6.3.1 20170620 (15:6.3.1+svn253039-1build1) 
root@ubuntu:~# arm-none-eabi-ld -v
GNU ld (2.27-9ubuntu1+9) 2.27
root@ubuntu:~# uname -a
Linux ubuntu 5.0.0-23-generic #24~18.04.1-Ubuntu SMP Mon Jul 29 16:10:24 UTC 2019 aarch64 aarch64 aarch64 GNU/Linux
root@ubuntu:~# 

 一个例子

cat include/cm3.h
#ifndef CM3_H
#define CM3_H
#include <stdint.h>

#define SCS_BASE            (0xE000E000)                 /*System Control Space Base Address */
#define SYSTICK_BASE        (SCS_BASE +  0x0010)         /*SysTick Base Address*/
#define SCB_BASE            (SCS_BASE +  0x0D00)
#define HSI_CLK             12000000UL
#define SYSTICK_PRIO_REG    (0xE000ED23)

typedef struct systick_tag {
    volatile uint32_t ctrl;
    volatile uint32_t load;
    volatile uint32_t val;
    volatile uint32_t calrb;
}systick_t;

extern uint32_t get_psp(void);
extern uint32_t get_msp(void);
extern uint32_t get_control_reg(void);

extern void init_systick(void);
#endif /*CM3_H*/

 

 

 

root@ubuntu:~/arm/rtos/02_cm3# cat cm3_s.s  

.text
.code 16
.global main
.global reset_handler
.global _p_stack_top
.global get_psp
.global get_msp
.global get_control_reg

reset_handler:

    /*Set the stack as process stack*/
    mov r0, #33
    mrs r0, CONTROL
    mov r1, #2
    orr r0, r1
    msr CONTROL, r0

    ldr r0, =_p_stack_top
    mov sp, r0

    ldr r0, =main
    blx r0
    b .

get_psp:
    mrs r0, PSP
    blx lr

get_msp:
    mrs r0, MSP
    blx lr

get_control_reg:
    mrs r0, CONTROL
    blx lr

 

 

 

 

root@ubuntu:~/arm/rtos/02_cm3# cat main.c
#include "os_stdio.h"
#include <stdint.h>
#include "cm3.h"

extern uint32_t _bss;
extern uint32_t _ebss;

static inline void clear_bss(void)
{
    uint8_t *start = (uint8_t *)_bss;
    while ((uint32_t)start < _ebss) {
        *start = 0;
        start++;
    }
}

void systick_handler(void)
{
    DEBUG("systick_handler\n");
}

int main()
{

    systick_t *systick_p = (systick_t *)SYSTICK_BASE;
    clear_bss();

    DEBUG("Hello RTOS\n");
    DEBUG("psp:0x%x\n", get_psp());
    DEBUG("msp:0x%x\n", get_msp());

    init_systick();
    while(1) {
    }
    return 0;
}

 

 

qemu-system-arm -M lm3s6965evb --kernel rtos.bin -nographic
Hello RTOS
psp:0x20007ff0
msp:0x2000c000
systick_handler
systick_handler
systick_handler
systick_handler
systick_handler
systick_handler
systick_handler
systick_handler
systick_handler
systick_handler

 

 

启动分析

root@ubuntu:~/arm/rtos/02_cm3# objdump -s -j .text  rtos.elf 

rtos.elf:     file format elf32-littlearm

Contents of section .text:
 0000 00c00020 b90c0000 6d020000 73020000  ... ....m...s...
 0010 79020000 79020000 79020000 00000000  y...y...y.......
 0020 00000000 00000000 00000000 79020000  ............y...
 0030 79020000 00000000 79020000 c1020000  y.......y.......
 0040 79020000 79020000 79020000 79020000  y...y...y...y...
 0050 79020000 79020000 79020000 79020000  y...y...y...y...
 0060 79020000 79020000 79020000 79020000  y...y...y...y...
 0070 79020000 79020000 79020000 79020000  y...y...y...y...
 0080 79020000 79020000 79020000 79020000  y...y...y...y...
 0090 79020000 79020000 79020000 79020000  y...y...y...y...
 00a0 79020000 79020000 79020000 79020000  y...y...y...y...
 00b0 79020000 79020000 79020000 79020000  y...y...y...y...
 00c0 79020000 79020000 79020000 79020000  y...y...y...y...
 00d0 79020000 79020000 79020000 79020000  y...y...y...y...
 00e0 79020000 79020000 79020000 79020000  y...y...y...y...
 00f0 79020000 79020000 79020000 79020000  y...y...y...y...
 0100 79020000 79020000 79020000 79020000  y...y...y...y...
 0110 79020000 79020000 79020000 79020000  y...y...y...y...
 0120 79020000 79020000 79020000 79020000  y...y...y...y...
 0130 79020000 79020000 79020000 79020000  y...y...y...y...
 0140 00000000 00000000 00000000 00000000  ................
 0150 79020000 79020000 79020000 79020000  y...y...y...y...

 

 

root@ubuntu:~/arm/rtos/02_cm3# arm-none-eabi-objdump -h  rtos.elf  | head

rtos.elf:     file format elf32-littlearm

Sections:
Idx Name          Size      VMA       LMA       File off  Algn
  0 .text         00000d80  00000000  00000000  00010000  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, CODE
  1 .debug_info   00000bd3  00000000  00000000  00010d80  2**0
                  CONTENTS, READONLY, DEBUGGING
  2 .debug_abbrev 0000037a  00000000  00000000  00011953  2**0
root@ubuntu:~/arm/rtos/02_cm3# arm-none-eabi-objdump -h  rtos.elf  

rtos.elf:     file format elf32-littlearm

Sections:
Idx Name          Size      VMA       LMA       File off  Algn
  0 .text         00000d80  00000000  00000000  00010000  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, CODE
  1 .debug_info   00000bd3  00000000  00000000  00010d80  2**0
                  CONTENTS, READONLY, DEBUGGING
  2 .debug_abbrev 0000037a  00000000  00000000  00011953  2**0
                  CONTENTS, READONLY, DEBUGGING
  3 .debug_loc    00000894  00000000  00000000  00011ccd  2**0
                  CONTENTS, READONLY, DEBUGGING
  4 .debug_aranges 000000a0  00000000  00000000  00012568  2**3
                  CONTENTS, READONLY, DEBUGGING
  5 .debug_line   000003e8  00000000  00000000  00012608  2**0
                  CONTENTS, READONLY, DEBUGGING
  6 .debug_str    0000032e  00000000  00000000  000129f0  2**0
                  CONTENTS, READONLY, DEBUGGING
  7 .comment      00000031  00000000  00000000  00012d1e  2**0
                  CONTENTS, READONLY
  8 .ARM.attributes 00000031  00000000  00000000  00012d4f  2**0
                  CONTENTS, READONLY
  9 .debug_frame  00000440  00000000  00000000  00012d80  2**2
                  CONTENTS, READONLY, DEBUGGING

 

 

 

root@ubuntu:~/arm/rtos/02_cm3# arm-none-eabi-objdump -S  rtos.elf  | head

rtos.elf:     file format elf32-littlearm


Disassembly of section .text:

00000000 <_text>:
   0:   2000c000        .word   0x2000c000
   4:   00000cb9        .word   0x00000cb9
   8:   0000026d        .word   0x0000026d

Cortex-M4也是从0x0000_0000开始执行的，中断向量表也是从这里起始，中断向量标的第一个地址是sp（Stack Top），第二个地址是Reset_Handler（复位中断），上电之后先赋值sp，然后跳转的Reset_Handler

简单的启动代码 

从NXP官方的示例中截取了一部分汇编码 因为我们只需要做到最简单的启动，所以只需要前两个中断向量

• 向量表部分代码

.section .isr_vector, "a" /*单独定义一个.isr_vector段，在ld script中设定向量表的内存位置*/
  .align 2
  .globl __isr_vector
__isr_vector:
  .long   __StackTop  /*Top Stack定义在ld script中， 之后会说到*/
  .long   Reset_Handler  /* Reset Handler */

 

等效于

typedef void (*vector_handler)(void);
extern void Reset_Handler();
extern char __StackTop[]; // __StackTop在ld script中需要声明

__attribute__((section(".isr_vector"))) // 将VectroTable放入.isr_vector段中
vector_handler VectorTable[] = {
  (vector_handler)__StackTop,
  Reset_Handler
};

 

//.FlashConfig段也不可忽略，汇编中并没有写出来

__attribute__((section(".FlashConfig")))
long FlashConfig[] = {
  0xFFFFFFFF,
  0xFFFFFFFF,
  0xFFFFFFFF,
  0xFFFFFFFE
};

 

• Reset_Handler 部分代码

.text
.thumb
.thumb_func
.global Reset_Handler
.align 2
.weak    Reset_Handler
.type    Reset_Handler, %function
Reset_Handler:
  cpsid   i /*关闭全局中断*/
  BL     start /*跳转的C语言start函数*/
  B .

 

等效于

void Reset_Handler() {
  __asm__("cpsid   i");
  start();
  while(1);
}

 

qemu

./configure --target-list=arm-softmmu,arm-linux-user