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Fix compatibility with Linaro toolchains for building ARM binaries

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Add DISCARD directives to the linker scripts and also -marm option
to GCC command line. Without this, certain toolchains may build
Thumb2 code by default. Also junk sections may be present in the
final binary and they need to be removed.

This helps at least when using the following Linaro toolchain:
gcc-linaro-5.1-2015.08-x86_64_arm-linux-gnueabihf.tar.xz

Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
Reviewed-by: Bernhard Nortmann <bernhard.nortmann@web.de>
This commit is contained in:
Siarhei Siamashka 2016-05-06 06:46:27 +03:00 committed by Bernhard Nortmann
parent bbdae67440
commit 776cf5543b
5 changed files with 45 additions and 25 deletions
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2
Makefile
View File

@ -121,7 +121,7 @@ sunxi-%: %.c
fel-pio.bin: fel-pio.elf fel-pio.nm
ARM_ELF_FLAGS = -Os -fpic -Wall
ARM_ELF_FLAGS = -Os -marm -fpic -Wall
ARM_ELF_FLAGS += -fno-common -fno-builtin -ffreestanding -nostdinc
ARM_ELF_FLAGS += -mno-thumb-interwork -fno-stack-protector -fno-toplevel-reorder
ARM_ELF_FLAGS += -Wstrict-prototypes -Wno-format-nonliteral -Wno-format-security

17
boot_head.lds
View File

@ -14,10 +14,15 @@
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
SECTIONS
{
. = 0x40007000;
.text : { *(.text) }
}
SECTIONS
{
. = 0x40007000;
.text : { *(.text) }
/DISCARD/ : { *(.dynstr*) }
/DISCARD/ : { *(.dynamic*) }
/DISCARD/ : { *(.plt*) }
/DISCARD/ : { *(.interp*) }
/DISCARD/ : { *(.gnu*) }
/DISCARD/ : { *(.note*) }
}

17
fel-pio.lds
View File

@ -14,10 +14,15 @@
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
SECTIONS
{
. = 0x2000;
.text : { *(.text) }
}
SECTIONS
{
. = 0x2000;
.text : { *(.text) }
/DISCARD/ : { *(.dynstr*) }
/DISCARD/ : { *(.dynamic*) }
/DISCARD/ : { *(.plt*) }
/DISCARD/ : { *(.interp*) }
/DISCARD/ : { *(.gnu*) }
/DISCARD/ : { *(.note*) }
}

17
fel-sdboot.lds
View File

@ -14,10 +14,15 @@
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
SECTIONS
{
. = 0x0030;
.text : { *(.text) }
}
SECTIONS
{
. = 0x0030;
.text : { *(.text) }
/DISCARD/ : { *(.dynstr*) }
/DISCARD/ : { *(.dynamic*) }
/DISCARD/ : { *(.plt*) }
/DISCARD/ : { *(.interp*) }
/DISCARD/ : { *(.gnu*) }
/DISCARD/ : { *(.note*) }
}

17
jtag-loop.lds
View File

@ -14,10 +14,15 @@
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
SECTIONS
{
. = 0x0030;
.text : { *(.text) }
}
SECTIONS
{
. = 0x0030;
.text : { *(.text) }
/DISCARD/ : { *(.dynstr*) }
/DISCARD/ : { *(.dynamic*) }
/DISCARD/ : { *(.plt*) }
/DISCARD/ : { *(.interp*) }
/DISCARD/ : { *(.gnu*) }
/DISCARD/ : { *(.note*) }
}