diff mbox series

boot/at91bootstrap: disable PIE and stack-protector build flags

Message ID 20221004125242.136925-1-kory.maincent@bootlin.com
State Accepted
Headers show
Series boot/at91bootstrap: disable PIE and stack-protector build flags | expand

Commit Message

Kory Maincent Oct. 4, 2022, 12:52 p.m. UTC 
From: Kory Maincent <kory.maincent@bootlin.com>

The toolchain wrapper add automatically Position Independent Execution
and stack protector flags in the build process when selected in the
configuration. at91bootstrap does not support these, therefore I added a
patch to disable them in the Makefiles

Signed-off-by: Kory Maincent <kory.maincent@bootlin.com>
---
 ...ck-protector-and-the-PIE-build-flags.patch | 502 ++++++++++++++++++
 1 file changed, 502 insertions(+)
 create mode 100644 boot/at91bootstrap/0004-ensure-the-stack-protector-and-the-PIE-build-flags.patch

Comments

Thomas Petazzoni Oct. 1, 2023, 9:04 a.m. UTC | #1 
Hello Köry,

On Tue,  4 Oct 2022 14:52:41 +0200
Köry Maincent via buildroot <buildroot@buildroot.org> wrote:

> From: Kory Maincent <kory.maincent@bootlin.com>
> 
> The toolchain wrapper add automatically Position Independent Execution
> and stack protector flags in the build process when selected in the
> configuration. at91bootstrap does not support these, therefore I added a
> patch to disable them in the Makefiles
> 
> Signed-off-by: Kory Maincent <kory.maincent@bootlin.com>
> ---
>  ...ck-protector-and-the-PIE-build-flags.patch | 502 ++++++++++++++++++
>  1 file changed, 502 insertions(+)
>  create mode 100644 boot/at91bootstrap/0004-ensure-the-stack-protector-and-the-PIE-build-flags.patch

Thanks for the patch. However, the at91bootstrap patch was highly
repetitive, and we have no chance of merging it upstream since upstream
is essentially dead. So instead, I committed this:

+# The at91bootstrap Makefile doesn't support customizing
+# CFLAGS/LDFLAGS, so we cheat and pass our custom flags through CC and
+# LD.
 define AT91BOOTSTRAP_BUILD_CMDS
-       $(MAKE1) CROSS_COMPILE=$(TARGET_CROSS) -C $(@D)/$(AT91BOOTSTRAP_MAKE_SUBDIR)
+       $(MAKE1) CROSS_COMPILE=$(TARGET_CROSS) \
+               CC="$(TARGET_CC) -fno-stack-protector" \
+               LD="$(TARGET_CC) -fno-PIE" \
+               -C $(@D)/$(AT91BOOTSTRAP_MAKE_SUBDIR)
 endef

which achieves exactly the same, but is more concise.

Thanks!

Thomas
Peter Korsgaard Oct. 13, 2023, 10:24 a.m. UTC | #2 
>>>>> "Thomas" == Thomas Petazzoni via buildroot <buildroot@buildroot.org> writes:

 > Hello Köry,
 > On Tue,  4 Oct 2022 14:52:41 +0200
 > Köry Maincent via buildroot <buildroot@buildroot.org> wrote:

 >> From: Kory Maincent <kory.maincent@bootlin.com>
 >> 
 >> The toolchain wrapper add automatically Position Independent Execution
 >> and stack protector flags in the build process when selected in the
 >> configuration. at91bootstrap does not support these, therefore I added a
 >> patch to disable them in the Makefiles
 >> 
 >> Signed-off-by: Kory Maincent <kory.maincent@bootlin.com>
 >> ---
 >> ...ck-protector-and-the-PIE-build-flags.patch | 502 ++++++++++++++++++
 >> 1 file changed, 502 insertions(+)
 >> create mode 100644 boot/at91bootstrap/0004-ensure-the-stack-protector-and-the-PIE-build-flags.patch

 > Thanks for the patch. However, the at91bootstrap patch was highly
 > repetitive, and we have no chance of merging it upstream since upstream
 > is essentially dead. So instead, I committed this:

 > +# The at91bootstrap Makefile doesn't support customizing
 > +# CFLAGS/LDFLAGS, so we cheat and pass our custom flags through CC and
 > +# LD.
 >  define AT91BOOTSTRAP_BUILD_CMDS
 > -       $(MAKE1) CROSS_COMPILE=$(TARGET_CROSS) -C $(@D)/$(AT91BOOTSTRAP_MAKE_SUBDIR)
 > +       $(MAKE1) CROSS_COMPILE=$(TARGET_CROSS) \
 > +               CC="$(TARGET_CC) -fno-stack-protector" \
 > +               LD="$(TARGET_CC) -fno-PIE" \
 > +               -C $(@D)/$(AT91BOOTSTRAP_MAKE_SUBDIR)
 >  endef

 > which achieves exactly the same, but is more concise.

Committed to 2023.02.x and 2023.08.x, thanks.
diff mbox series

Patch

diff --git a/boot/at91bootstrap/0004-ensure-the-stack-protector-and-the-PIE-build-flags.patch b/boot/at91bootstrap/0004-ensure-the-stack-protector-and-the-PIE-build-flags.patch
new file mode 100644
index 0000000000..a4cc3819d0
--- /dev/null
+++ b/boot/at91bootstrap/0004-ensure-the-stack-protector-and-the-PIE-build-flags.patch
@@ -0,0 +1,502 @@ 
+From 66f7a5ed597adb166461531e8c914b07bbd41563 Mon Sep 17 00:00:00 2001
+From: Kory Maincent <kory.maincent@bootlin.com>
+Date: Tue, 4 Oct 2022 11:39:24 +0200
+Subject: [PATCH] ensure the stack protector and the PIE build flags are
+ disabled
+
+at91bootstrap does not support to build with stack-protector and position
+independant executable.
+Add -fno-stack-protector and -fno-PIE to the Makefiles to disable it.
+
+Signed-off-by: Kory Maincent <kory.maincent@bootlin.com>
+---
+ board/at91cap9adk/dataflash/Makefile      | 4 ++--
+ board/at91cap9adk/norflash/Makefile       | 4 ++--
+ board/at91cap9stk/nandflash/Makefile      | 4 ++--
+ board/at91sam9260ek/dataflash/Makefile    | 4 ++--
+ board/at91sam9260ek/nandflash/Makefile    | 4 ++--
+ board/at91sam9261ek/dataflash/Makefile    | 4 ++--
+ board/at91sam9261ek/nandflash/Makefile    | 4 ++--
+ board/at91sam9263ek/dataflash/Makefile    | 4 ++--
+ board/at91sam9263ek/nandflash/Makefile    | 4 ++--
+ board/at91sam9g10ek/dataflash/Makefile    | 4 ++--
+ board/at91sam9g10ek/nandflash/Makefile    | 4 ++--
+ board/at91sam9g20ek/dataflash/Makefile    | 4 ++--
+ board/at91sam9g20ek/nandflash/Makefile    | 4 ++--
+ board/at91sam9g45ekes/nandflash/Makefile  | 4 ++--
+ board/at91sam9m10ekes/dataflash/Makefile  | 4 ++--
+ board/at91sam9m10ekes/nandflash/Makefile  | 4 ++--
+ board/at91sam9m10g45ek/dataflash/Makefile | 4 ++--
+ board/at91sam9m10g45ek/nandflash/Makefile | 4 ++--
+ board/at91sam9rlek/dataflash/Makefile     | 4 ++--
+ board/at91sam9rlek/nandflash/Makefile     | 4 ++--
+ board/at91sam9xeek/dataflash/Makefile     | 4 ++--
+ board/at91sam9xeek/nandflash/Makefile     | 4 ++--
+ 22 files changed, 44 insertions(+), 44 deletions(-)
+
+diff --git a/board/at91cap9adk/dataflash/Makefile b/board/at91cap9adk/dataflash/Makefile
+index 5196783..e904788 100644
+--- a/board/at91cap9adk/dataflash/Makefile
++++ b/board/at91cap9adk/dataflash/Makefile
+@@ -34,14 +34,14 @@ NM= $(CROSS_COMPILE)nm
+ SIZE=$(CROSS_COMPILE)size
+ OBJCOPY=$(CROSS_COMPILE)objcopy
+ OBJDUMP=$(CROSS_COMPILE)objdump
+-CCFLAGS=-g -mcpu=arm9 -Os -Wall -D$(TARGET) -D$(BOARD) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables
++CCFLAGS=-g -mcpu=arm9 -Os -Wall -D$(TARGET) -D$(BOARD) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-stack-protector
+ ASFLAGS=-g -mcpu=arm9 -c -Os -Wall -D$(TARGET) -D$(BOARD) -I$(INCL) -DTOP_OF_MEM=$(TOP_OF_MEMORY)
+ 
+ # Linker flags.
+ #  -Wl,...:     tell GCC to pass this to linker.
+ #    -Map:      create map file
+ #    --cref:    add cross reference to map file
+-LDFLAGS+=-nostartfiles -nostdlib  -Wl,-Map=$(BOOT_NAME).map,--cref
++LDFLAGS+=-nostartfiles -nostdlib  -Wl,-Map=$(BOOT_NAME).map,--cref -fno-PIE
+ LDFLAGS+=-T $(BOOTSTRAP_PATH)/elf32-littlearm.lds -Ttext $(LINK_ADDR)
+ OBJS=crt0_gnu.o
+ 
+diff --git a/board/at91cap9adk/norflash/Makefile b/board/at91cap9adk/norflash/Makefile
+index 22390e8..8ac8301 100644
+--- a/board/at91cap9adk/norflash/Makefile
++++ b/board/at91cap9adk/norflash/Makefile
+@@ -34,14 +34,14 @@ NM= $(CROSS_COMPILE)nm
+ SIZE=$(CROSS_COMPILE)size
+ OBJCOPY=$(CROSS_COMPILE)objcopy
+ OBJDUMP=$(CROSS_COMPILE)objdump
+-CCFLAGS=-g -mcpu=arm9 -Os -Wall -D$(TARGET) -D$(BOARD) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables
++CCFLAGS=-g -mcpu=arm9 -Os -Wall -D$(TARGET) -D$(BOARD) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-stack-protector
+ ASFLAGS=-g -mcpu=arm9 -c -Os -Wall -D$(TARGET) -D$(BOARD) -I$(INCL) -DTOP_OF_MEM=$(TOP_OF_MEMORY)
+ 
+ # Linker flags.
+ #  -Wl,...:     tell GCC to pass this to linker.
+ #    -Map:      create map file
+ #    --cref:    add cross reference to map file
+-LDFLAGS+=-nostartfiles -nostdlib  -Wl,-Map=$(BOOT_NAME).map,--cref
++LDFLAGS+=-nostartfiles -nostdlib  -Wl,-Map=$(BOOT_NAME).map,--cref -fno-PIE
+ LDFLAGS+=-T $(BOOTSTRAP_PATH)/elf32-littlearm.lds -Ttext $(LINK_ADDR)
+ OBJS=crt0_gnu.o
+ 
+diff --git a/board/at91cap9stk/nandflash/Makefile b/board/at91cap9stk/nandflash/Makefile
+index 0b5b0ef..31ed32e 100755
+--- a/board/at91cap9stk/nandflash/Makefile
++++ b/board/at91cap9stk/nandflash/Makefile
+@@ -37,7 +37,7 @@ NM= $(CROSS_COMPILE)nm
+ SIZE=$(CROSS_COMPILE)size
+ OBJCOPY=$(CROSS_COMPILE)objcopy
+ OBJDUMP=$(CROSS_COMPILE)objdump
+-CCFLAGS=-g -mcpu=arm9 -Os -Wall -D$(TARGET) -D$(BOARD) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables
++CCFLAGS=-g -mcpu=arm9 -Os -Wall -D$(TARGET) -D$(BOARD) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-stack-protector
+ ASFLAGS=-g -mcpu=arm9 -c -Os -Wall -D$(TARGET) -D$(BOARD) -I$(INCL) -DTOP_OF_MEM=$(TOP_OF_MEMORY)
+ 
+ 
+@@ -45,7 +45,7 @@ ASFLAGS=-g -mcpu=arm9 -c -Os -Wall -D$(TARGET) -D$(BOARD) -I$(INCL) -DTOP_OF_MEM
+ #  -Wl,...:     tell GCC to pass this to linker.
+ #    -Map:      create map file
+ #    --cref:    add cross reference to map file
+-LDFLAGS+=-nostartfiles -nostdlib -Wl,-Map=$(BOOT_NAME).map,--cref
++LDFLAGS+=-nostartfiles -nostdlib -Wl,-Map=$(BOOT_NAME).map,--cref -fno-PIE
+ LDFLAGS+=-T $(BOOTSTRAP_PATH)/elf32-littlearm.lds -Ttext $(LINK_ADDR)
+ OBJS=crt0_gnu.o
+ 
+diff --git a/board/at91sam9260ek/dataflash/Makefile b/board/at91sam9260ek/dataflash/Makefile
+index 8035a3b..8765e9c 100644
+--- a/board/at91sam9260ek/dataflash/Makefile
++++ b/board/at91sam9260ek/dataflash/Makefile
+@@ -37,14 +37,14 @@ NM= $(CROSS_COMPILE)nm
+ SIZE=$(CROSS_COMPILE)size
+ OBJCOPY=$(CROSS_COMPILE)objcopy
+ OBJDUMP=$(CROSS_COMPILE)objdump
+-CCFLAGS=-g -mcpu=arm926ej-s -Os -Wall -D$(TARGET) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables
++CCFLAGS=-g -mcpu=arm926ej-s -Os -Wall -D$(TARGET) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-stack-protector
+ ASFLAGS=-g -mcpu=arm926ej-s -c -Os -Wall -D$(TARGET) -I$(INCL) -DTOP_OF_MEM=$(TOP_OF_MEMORY)
+ 
+ # Linker flags.
+ #  -Wl,...:     tell GCC to pass this to linker.
+ #    -Map:      create map file
+ #    --cref:    add cross reference to map file
+-LDFLAGS+=-nostartfiles -nostdlib -Wl,-Map=$(BOOT_NAME).map,--cref
++LDFLAGS+=-nostartfiles -nostdlib -Wl,-Map=$(BOOT_NAME).map,--cref -fno-PIE
+ LDFLAGS+=-T $(BOOTSTRAP_PATH)/elf32-littlearm.lds -Ttext $(LINK_ADDR)
+ OBJS=crt0_gnu.o
+ 
+diff --git a/board/at91sam9260ek/nandflash/Makefile b/board/at91sam9260ek/nandflash/Makefile
+index 7c3982d..a816ba3 100644
+--- a/board/at91sam9260ek/nandflash/Makefile
++++ b/board/at91sam9260ek/nandflash/Makefile
+@@ -37,14 +37,14 @@ NM= $(CROSS_COMPILE)nm
+ SIZE=$(CROSS_COMPILE)size
+ OBJCOPY=$(CROSS_COMPILE)objcopy
+ OBJDUMP=$(CROSS_COMPILE)objdump
+-CCFLAGS=-g -mcpu=arm926ej-s -Os -Wall -D$(TARGET) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables
++CCFLAGS=-g -mcpu=arm926ej-s -Os -Wall -D$(TARGET) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-stack-protector
+ ASFLAGS=-g -mcpu=arm926ej-s -c -Os -Wall -D$(TARGET) -I$(INCL) -DTOP_OF_MEM=$(TOP_OF_MEMORY)
+ 
+ # Linker flags.
+ #  -Wl,...:     tell GCC to pass this to linker.
+ #    -Map:      create map file
+ #    --cref:    add cross reference to map file
+-LDFLAGS+=-nostartfiles -nostdlib -Wl,-Map=$(BOOT_NAME).map,--cref
++LDFLAGS+=-nostartfiles -nostdlib -Wl,-Map=$(BOOT_NAME).map,--cref -fno-PIE
+ LDFLAGS+=-T $(BOOTSTRAP_PATH)/elf32-littlearm.lds -Ttext $(LINK_ADDR)
+ OBJS=crt0_gnu.o
+ 
+diff --git a/board/at91sam9261ek/dataflash/Makefile b/board/at91sam9261ek/dataflash/Makefile
+index 2f7e637..c265c8b 100644
+--- a/board/at91sam9261ek/dataflash/Makefile
++++ b/board/at91sam9261ek/dataflash/Makefile
+@@ -37,14 +37,14 @@ NM= $(CROSS_COMPILE)nm
+ SIZE=$(CROSS_COMPILE)size
+ OBJCOPY=$(CROSS_COMPILE)objcopy
+ OBJDUMP=$(CROSS_COMPILE)objdump
+-CCFLAGS=-g -mcpu=arm9 -Os -Wall -D$(TARGET) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables
++CCFLAGS=-g -mcpu=arm9 -Os -Wall -D$(TARGET) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-stack-protector
+ ASFLAGS=-g -mcpu=arm9 -c -Os -Wall -D$(TARGET) -I$(INCL) -DTOP_OF_MEM=$(TOP_OF_MEMORY)
+ 
+ # Linker flags.
+ #  -Wl,...:     tell GCC to pass this to linker.
+ #    -Map:      create map file
+ #    --cref:    add cross reference to map file
+-LDFLAGS+=-nostartfiles -nostdlib -Wl,-Map=$(BOOT_NAME).map,--cref
++LDFLAGS+=-nostartfiles -nostdlib -Wl,-Map=$(BOOT_NAME).map,--cref -fno-PIE
+ LDFLAGS+=-T $(BOOTSTRAP_PATH)/elf32-littlearm.lds -Ttext $(LINK_ADDR)
+ OBJS=crt0_gnu.o
+ 
+diff --git a/board/at91sam9261ek/nandflash/Makefile b/board/at91sam9261ek/nandflash/Makefile
+index 66d5712..fc1da7e 100644
+--- a/board/at91sam9261ek/nandflash/Makefile
++++ b/board/at91sam9261ek/nandflash/Makefile
+@@ -37,14 +37,14 @@ NM= $(CROSS_COMPILE)nm
+ SIZE=$(CROSS_COMPILE)size
+ OBJCOPY=$(CROSS_COMPILE)objcopy
+ OBJDUMP=$(CROSS_COMPILE)objdump
+-CCFLAGS=-g -mcpu=arm9 -Os -Wall -D$(TARGET) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables
++CCFLAGS=-g -mcpu=arm9 -Os -Wall -D$(TARGET) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-stack-protector
+ ASFLAGS=-g -mcpu=arm9 -c -Os -Wall -D$(TARGET) -I$(INCL) -DTOP_OF_MEM=$(TOP_OF_MEMORY)
+ 
+ # Linker flags.
+ #  -Wl,...:     tell GCC to pass this to linker.
+ #    -Map:      create map file
+ #    --cref:    add cross reference to map file
+-LDFLAGS+=-nostartfiles -nostdlib -Wl,-Map=$(BOOT_NAME).map,--cref
++LDFLAGS+=-nostartfiles -nostdlib -Wl,-Map=$(BOOT_NAME).map,--cref -fno-PIE
+ LDFLAGS+=-T $(BOOTSTRAP_PATH)/elf32-littlearm.lds -Ttext $(LINK_ADDR)
+ OBJS=crt0_gnu.o
+ 
+diff --git a/board/at91sam9263ek/dataflash/Makefile b/board/at91sam9263ek/dataflash/Makefile
+index 696e872..4e60260 100644
+--- a/board/at91sam9263ek/dataflash/Makefile
++++ b/board/at91sam9263ek/dataflash/Makefile
+@@ -34,14 +34,14 @@ NM= $(CROSS_COMPILE)nm
+ SIZE=$(CROSS_COMPILE)size
+ OBJCOPY=$(CROSS_COMPILE)objcopy
+ OBJDUMP=$(CROSS_COMPILE)objdump
+-CCFLAGS=-g -mcpu=arm9 -Os -Wall -D$(TARGET) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables
++CCFLAGS=-g -mcpu=arm9 -Os -Wall -D$(TARGET) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-stack-protector
+ ASFLAGS=-g -mcpu=arm9 -c -Os -Wall -D$(TARGET) -I$(INCL) -DTOP_OF_MEM=$(TOP_OF_MEMORY)
+ 
+ # Linker flags.
+ #  -Wl,...:     tell GCC to pass this to linker.
+ #    -Map:      create map file
+ #    --cref:    add cross reference to map file
+-LDFLAGS+=-nostartfiles -nostdlib  -Wl,-Map=$(BOOT_NAME).map,--cref
++LDFLAGS+=-nostartfiles -nostdlib  -Wl,-Map=$(BOOT_NAME).map,--cref -fno-PIE
+ LDFLAGS+=-T $(BOOTSTRAP_PATH)/elf32-littlearm.lds -Ttext $(LINK_ADDR)
+ OBJS=crt0_gnu.o
+ 
+diff --git a/board/at91sam9263ek/nandflash/Makefile b/board/at91sam9263ek/nandflash/Makefile
+index 7b90eab..a916fcf 100644
+--- a/board/at91sam9263ek/nandflash/Makefile
++++ b/board/at91sam9263ek/nandflash/Makefile
+@@ -33,14 +33,14 @@ NM= $(CROSS_COMPILE)nm
+ SIZE=$(CROSS_COMPILE)size
+ OBJCOPY=$(CROSS_COMPILE)objcopy
+ OBJDUMP=$(CROSS_COMPILE)objdump
+-CCFLAGS=-g -mcpu=arm9 -O0 -Wall -D$(TARGET) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables
++CCFLAGS=-g -mcpu=arm9 -O0 -Wall -D$(TARGET) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-stack-protector
+ ASFLAGS=-g -mcpu=arm9 -c -Os -Wall -D$(TARGET) -I$(INCL) -DTOP_OF_MEM=$(TOP_OF_MEMORY)
+ 
+ # Linker flags.
+ #  -Wl,...:     tell GCC to pass this to linker.
+ #    -Map:      create map file
+ #    --cref:    add cross reference to map file
+-LDFLAGS+=-nostartfiles -nostdlib  -Wl,-Map=$(BOOT_NAME).map,--cref
++LDFLAGS+=-nostartfiles -nostdlib  -Wl,-Map=$(BOOT_NAME).map,--cref -fno-PIE
+ LDFLAGS+=-T $(BOOTSTRAP_PATH)/elf32-littlearm.lds -Ttext $(LINK_ADDR)
+ OBJS=crt0_gnu.o
+ 
+diff --git a/board/at91sam9g10ek/dataflash/Makefile b/board/at91sam9g10ek/dataflash/Makefile
+index 84060d7..d2c9b33 100644
+--- a/board/at91sam9g10ek/dataflash/Makefile
++++ b/board/at91sam9g10ek/dataflash/Makefile
+@@ -37,14 +37,14 @@ NM= $(CROSS_COMPILE)nm
+ SIZE=$(CROSS_COMPILE)size
+ OBJCOPY=$(CROSS_COMPILE)objcopy
+ OBJDUMP=$(CROSS_COMPILE)objdump
+-CCFLAGS=-g -mcpu=arm9 -Os -Wall -D$(TARGET) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables
++CCFLAGS=-g -mcpu=arm9 -Os -Wall -D$(TARGET) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-stack-protector
+ ASFLAGS=-g -mcpu=arm9 -c -Os -Wall -D$(TARGET) -I$(INCL) -DTOP_OF_MEM=$(TOP_OF_MEMORY)
+ 
+ # Linker flags.
+ #  -Wl,...:     tell GCC to pass this to linker.
+ #    -Map:      create map file
+ #    --cref:    add cross reference to map file
+-LDFLAGS+=-nostartfiles -nostdlib -Wl,-Map=$(BOOT_NAME).map,--cref
++LDFLAGS+=-nostartfiles -nostdlib -Wl,-Map=$(BOOT_NAME).map,--cref -fno-PIE
+ LDFLAGS+=-T $(BOOTSTRAP_PATH)/elf32-littlearm.lds -Ttext $(LINK_ADDR)
+ OBJS=crt0_gnu.o
+ 
+diff --git a/board/at91sam9g10ek/nandflash/Makefile b/board/at91sam9g10ek/nandflash/Makefile
+index e9c1398..2cbb641 100644
+--- a/board/at91sam9g10ek/nandflash/Makefile
++++ b/board/at91sam9g10ek/nandflash/Makefile
+@@ -37,14 +37,14 @@ NM= $(CROSS_COMPILE)nm
+ SIZE=$(CROSS_COMPILE)size
+ OBJCOPY=$(CROSS_COMPILE)objcopy
+ OBJDUMP=$(CROSS_COMPILE)objdump
+-CCFLAGS=-g -mcpu=arm9 -Os -Wall -D$(TARGET) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables
++CCFLAGS=-g -mcpu=arm9 -Os -Wall -D$(TARGET) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-stack-protector
+ ASFLAGS=-g -mcpu=arm9 -c -Os -Wall -D$(TARGET) -I$(INCL) -DTOP_OF_MEM=$(TOP_OF_MEMORY)
+ 
+ # Linker flags.
+ #  -Wl,...:     tell GCC to pass this to linker.
+ #    -Map:      create map file
+ #    --cref:    add cross reference to map file
+-LDFLAGS+=-nostartfiles -nostdlib -Wl,-Map=$(BOOT_NAME).map,--cref
++LDFLAGS+=-nostartfiles -nostdlib -Wl,-Map=$(BOOT_NAME).map,--cref -fno-PIE
+ LDFLAGS+=-T $(BOOTSTRAP_PATH)/elf32-littlearm.lds -Ttext $(LINK_ADDR)
+ OBJS=crt0_gnu.o
+ 
+diff --git a/board/at91sam9g20ek/dataflash/Makefile b/board/at91sam9g20ek/dataflash/Makefile
+index a11b080..dd15946 100644
+--- a/board/at91sam9g20ek/dataflash/Makefile
++++ b/board/at91sam9g20ek/dataflash/Makefile
+@@ -37,14 +37,14 @@ NM= $(CROSS_COMPILE)nm
+ SIZE=$(CROSS_COMPILE)size
+ OBJCOPY=$(CROSS_COMPILE)objcopy
+ OBJDUMP=$(CROSS_COMPILE)objdump
+-CCFLAGS=-g -mcpu=arm926ej-s -Os -Wall -D$(TARGET) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables
++CCFLAGS=-g -mcpu=arm926ej-s -Os -Wall -D$(TARGET) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-stack-protector
+ ASFLAGS=-g -mcpu=arm926ej-s -c -Os -Wall -D$(TARGET) -I$(INCL) -DTOP_OF_MEM=$(TOP_OF_MEMORY)
+ 
+ # Linker flags.
+ #  -Wl,...:     tell GCC to pass this to linker.
+ #    -Map:      create map file
+ #    --cref:    add cross reference to map file
+-LDFLAGS+=-nostartfiles -nostdlib -Wl,-Map=$(BOOT_NAME).map,--cref
++LDFLAGS+=-nostartfiles -nostdlib -Wl,-Map=$(BOOT_NAME).map,--cref -fno-PIE
+ LDFLAGS+=-T $(BOOTSTRAP_PATH)/elf32-littlearm.lds -Ttext $(LINK_ADDR)
+ OBJS=crt0_gnu.o
+ 
+diff --git a/board/at91sam9g20ek/nandflash/Makefile b/board/at91sam9g20ek/nandflash/Makefile
+index 109a3c8..630430f 100644
+--- a/board/at91sam9g20ek/nandflash/Makefile
++++ b/board/at91sam9g20ek/nandflash/Makefile
+@@ -37,14 +37,14 @@ NM= $(CROSS_COMPILE)nm
+ SIZE=$(CROSS_COMPILE)size
+ OBJCOPY=$(CROSS_COMPILE)objcopy
+ OBJDUMP=$(CROSS_COMPILE)objdump
+-CCFLAGS=-g -mcpu=arm926ej-s -Os -Wall -D$(TARGET) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables
++CCFLAGS=-g -mcpu=arm926ej-s -Os -Wall -D$(TARGET) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-stack-protector
+ ASFLAGS=-g -mcpu=arm926ej-s -c -Os -Wall -D$(TARGET) -I$(INCL) -DTOP_OF_MEM=$(TOP_OF_MEMORY)
+ 
+ # Linker flags.
+ #  -Wl,...:     tell GCC to pass this to linker.
+ #    -Map:      create map file
+ #    --cref:    add cross reference to map file
+-LDFLAGS+=-nostartfiles -nostdlib -Wl,-Map=$(BOOT_NAME).map,--cref
++LDFLAGS+=-nostartfiles -nostdlib -Wl,-Map=$(BOOT_NAME).map,--cref -fno-PIE
+ LDFLAGS+=-T $(BOOTSTRAP_PATH)/elf32-littlearm.lds -Ttext $(LINK_ADDR)
+ OBJS=crt0_gnu.o
+ 
+diff --git a/board/at91sam9g45ekes/nandflash/Makefile b/board/at91sam9g45ekes/nandflash/Makefile
+index a96a5fa..99c02d8 100644
+--- a/board/at91sam9g45ekes/nandflash/Makefile
++++ b/board/at91sam9g45ekes/nandflash/Makefile
+@@ -37,14 +37,14 @@ NM= $(CROSS_COMPILE)nm
+ SIZE=$(CROSS_COMPILE)size
+ OBJCOPY=$(CROSS_COMPILE)objcopy
+ OBJDUMP=$(CROSS_COMPILE)objdump
+-CCFLAGS=-g -mcpu=arm926ej-s -O2 -Wall -D$(TARGET) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables
++CCFLAGS=-g -mcpu=arm926ej-s -O2 -Wall -D$(TARGET) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-stack-protector
+ ASFLAGS=-g -mcpu=arm926ej-s -c -O2 -Wall -D$(TARGET) -I$(INCL) -DTOP_OF_MEM=$(TOP_OF_MEMORY)
+ 
+ # Linker flags.
+ #  -Wl,...:     tell GCC to pass this to linker.
+ #    -Map:      create map file
+ #    --cref:    add cross reference to map file
+-LDFLAGS+=-nostartfiles -nostdlib -Wl,-Map=$(BOOT_NAME).map,--cref
++LDFLAGS+=-nostartfiles -nostdlib -Wl,-Map=$(BOOT_NAME).map,--cref -fno-PIE
+ LDFLAGS+=-T $(BOOTSTRAP_PATH)/elf32-littlearm.lds -Ttext $(LINK_ADDR)
+ OBJS=crt0_gnu.o
+ 
+diff --git a/board/at91sam9m10ekes/dataflash/Makefile b/board/at91sam9m10ekes/dataflash/Makefile
+index 28e8d42..17e2590 100644
+--- a/board/at91sam9m10ekes/dataflash/Makefile
++++ b/board/at91sam9m10ekes/dataflash/Makefile
+@@ -37,14 +37,14 @@ NM= $(CROSS_COMPILE)nm
+ SIZE=$(CROSS_COMPILE)size
+ OBJCOPY=$(CROSS_COMPILE)objcopy
+ OBJDUMP=$(CROSS_COMPILE)objdump
+-CCFLAGS=-g -mcpu=arm926ej-s -O2 -Wall -D$(TARGET) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables
++CCFLAGS=-g -mcpu=arm926ej-s -O2 -Wall -D$(TARGET) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-stack-protector
+ ASFLAGS=-g -mcpu=arm926ej-s -c -O2 -Wall -D$(TARGET) -I$(INCL) -DTOP_OF_MEM=$(TOP_OF_MEMORY)
+ 
+ # Linker flags.
+ #  -Wl,...:     tell GCC to pass this to linker.
+ #    -Map:      create map file
+ #    --cref:    add cross reference to map file
+-LDFLAGS+=-nostartfiles -nostdlib -Wl,-Map=$(BOOT_NAME).map,--cref
++LDFLAGS+=-nostartfiles -nostdlib -Wl,-Map=$(BOOT_NAME).map,--cref -fno-PIE
+ LDFLAGS+=-T $(BOOTSTRAP_PATH)/elf32-littlearm.lds -Ttext $(LINK_ADDR)
+ OBJS=crt0_gnu.o
+ 
+diff --git a/board/at91sam9m10ekes/nandflash/Makefile b/board/at91sam9m10ekes/nandflash/Makefile
+index 0ffd08d..01108de 100644
+--- a/board/at91sam9m10ekes/nandflash/Makefile
++++ b/board/at91sam9m10ekes/nandflash/Makefile
+@@ -37,14 +37,14 @@ NM= $(CROSS_COMPILE)nm
+ SIZE=$(CROSS_COMPILE)size
+ OBJCOPY=$(CROSS_COMPILE)objcopy
+ OBJDUMP=$(CROSS_COMPILE)objdump
+-CCFLAGS=-g -mcpu=arm926ej-s -O2 -Wall -D$(TARGET) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables
++CCFLAGS=-g -mcpu=arm926ej-s -O2 -Wall -D$(TARGET) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-stack-protector
+ ASFLAGS=-g -mcpu=arm926ej-s -c -O2 -Wall -D$(TARGET) -I$(INCL) -DTOP_OF_MEM=$(TOP_OF_MEMORY)
+ 
+ # Linker flags.
+ #  -Wl,...:     tell GCC to pass this to linker.
+ #    -Map:      create map file
+ #    --cref:    add cross reference to map file
+-LDFLAGS+=-nostartfiles -nostdlib -Wl,-Map=$(BOOT_NAME).map,--cref
++LDFLAGS+=-nostartfiles -nostdlib -Wl,-Map=$(BOOT_NAME).map,--cref -fno-PIE
+ LDFLAGS+=-T $(BOOTSTRAP_PATH)/elf32-littlearm.lds -Ttext $(LINK_ADDR)
+ OBJS=crt0_gnu.o
+ 
+diff --git a/board/at91sam9m10g45ek/dataflash/Makefile b/board/at91sam9m10g45ek/dataflash/Makefile
+index 0eefc52..805073a 100644
+--- a/board/at91sam9m10g45ek/dataflash/Makefile
++++ b/board/at91sam9m10g45ek/dataflash/Makefile
+@@ -37,14 +37,14 @@ NM= $(CROSS_COMPILE)nm
+ SIZE=$(CROSS_COMPILE)size
+ OBJCOPY=$(CROSS_COMPILE)objcopy
+ OBJDUMP=$(CROSS_COMPILE)objdump
+-CCFLAGS=-g -mcpu=arm926ej-s -O2 -Wall -D$(TARGET) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables
++CCFLAGS=-g -mcpu=arm926ej-s -O2 -Wall -D$(TARGET) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-stack-protector
+ ASFLAGS=-g -mcpu=arm926ej-s -c -O2 -Wall -D$(TARGET) -I$(INCL) -DTOP_OF_MEM=$(TOP_OF_MEMORY)
+ 
+ # Linker flags.
+ #  -Wl,...:     tell GCC to pass this to linker.
+ #    -Map:      create map file
+ #    --cref:    add cross reference to map file
+-LDFLAGS+=-nostartfiles -nostdlib -Wl,-Map=$(BOOT_NAME).map,--cref
++LDFLAGS+=-nostartfiles -nostdlib -Wl,-Map=$(BOOT_NAME).map,--cref -fno-PIE
+ LDFLAGS+=-T $(BOOTSTRAP_PATH)/elf32-littlearm.lds -Ttext $(LINK_ADDR)
+ OBJS=crt0_gnu.o
+ 
+diff --git a/board/at91sam9m10g45ek/nandflash/Makefile b/board/at91sam9m10g45ek/nandflash/Makefile
+index f7cde1b..121594d 100644
+--- a/board/at91sam9m10g45ek/nandflash/Makefile
++++ b/board/at91sam9m10g45ek/nandflash/Makefile
+@@ -37,14 +37,14 @@ NM= $(CROSS_COMPILE)nm
+ SIZE=$(CROSS_COMPILE)size
+ OBJCOPY=$(CROSS_COMPILE)objcopy
+ OBJDUMP=$(CROSS_COMPILE)objdump
+-CCFLAGS=-g -mcpu=arm926ej-s -O2 -Wall -D$(TARGET) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables
++CCFLAGS=-g -mcpu=arm926ej-s -O2 -Wall -D$(TARGET) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-stack-protector
+ ASFLAGS=-g -mcpu=arm926ej-s -c -O2 -Wall -D$(TARGET) -I$(INCL) -DTOP_OF_MEM=$(TOP_OF_MEMORY)
+ 
+ # Linker flags.
+ #  -Wl,...:     tell GCC to pass this to linker.
+ #    -Map:      create map file
+ #    --cref:    add cross reference to map file
+-LDFLAGS+=-nostartfiles -nostdlib -Wl,-Map=$(BOOT_NAME).map,--cref
++LDFLAGS+=-nostartfiles -nostdlib -Wl,-Map=$(BOOT_NAME).map,--cref -fno-PIE
+ LDFLAGS+=-T $(BOOTSTRAP_PATH)/elf32-littlearm.lds -Ttext $(LINK_ADDR)
+ OBJS=crt0_gnu.o
+ 
+diff --git a/board/at91sam9rlek/dataflash/Makefile b/board/at91sam9rlek/dataflash/Makefile
+index 83f5c62..0bd9261 100644
+--- a/board/at91sam9rlek/dataflash/Makefile
++++ b/board/at91sam9rlek/dataflash/Makefile
+@@ -37,14 +37,14 @@ NM= $(CROSS_COMPILE)nm
+ SIZE=$(CROSS_COMPILE)size
+ OBJCOPY=$(CROSS_COMPILE)objcopy
+ OBJDUMP=$(CROSS_COMPILE)objdump
+-CCFLAGS=-g -mcpu=arm926ej-s -Os -Wall -D$(TARGET) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables
++CCFLAGS=-g -mcpu=arm926ej-s -Os -Wall -D$(TARGET) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-stack-protector
+ ASFLAGS=-g -mcpu=arm926ej-s -c -Os -Wall -D$(TARGET) -I$(INCL) -DTOP_OF_MEM=$(TOP_OF_MEMORY)
+ 
+ # Linker flags.
+ #  -Wl,...:     tell GCC to pass this to linker.
+ #    -Map:      create map file
+ #    --cref:    add cross reference to map file
+-LDFLAGS+=-nostartfiles -nostdlib -Wl,-Map=$(BOOT_NAME).map,--cref
++LDFLAGS+=-nostartfiles -nostdlib -Wl,-Map=$(BOOT_NAME).map,--cref -fno-PIE
+ LDFLAGS+=-T $(BOOTSTRAP_PATH)/elf32-littlearm.lds -Ttext $(LINK_ADDR)
+ OBJS=crt0_gnu.o
+ 
+diff --git a/board/at91sam9rlek/nandflash/Makefile b/board/at91sam9rlek/nandflash/Makefile
+index 961a3fb..0e51a70 100644
+--- a/board/at91sam9rlek/nandflash/Makefile
++++ b/board/at91sam9rlek/nandflash/Makefile
+@@ -37,14 +37,14 @@ NM= $(CROSS_COMPILE)nm
+ SIZE=$(CROSS_COMPILE)size
+ OBJCOPY=$(CROSS_COMPILE)objcopy
+ OBJDUMP=$(CROSS_COMPILE)objdump
+-CCFLAGS=-g -mcpu=arm926ej-s -Os -Wall -D$(TARGET) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables
++CCFLAGS=-g -mcpu=arm926ej-s -Os -Wall -D$(TARGET) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-stack-protector
+ ASFLAGS=-g -mcpu=arm926ej-s -c -Os -Wall -D$(TARGET) -I$(INCL) -DTOP_OF_MEM=$(TOP_OF_MEMORY)
+ 
+ # Linker flags.
+ #  -Wl,...:     tell GCC to pass this to linker.
+ #    -Map:      create map file
+ #    --cref:    add cross reference to map file
+-LDFLAGS+=-nostartfiles -nostdlib -Wl,-Map=$(BOOT_NAME).map,--cref
++LDFLAGS+=-nostartfiles -nostdlib -Wl,-Map=$(BOOT_NAME).map,--cref -fno-PIE
+ LDFLAGS+=-T $(BOOTSTRAP_PATH)/elf32-littlearm.lds -Ttext $(LINK_ADDR)
+ OBJS=crt0_gnu.o
+ 
+diff --git a/board/at91sam9xeek/dataflash/Makefile b/board/at91sam9xeek/dataflash/Makefile
+index 07e0d4c..274fc30 100644
+--- a/board/at91sam9xeek/dataflash/Makefile
++++ b/board/at91sam9xeek/dataflash/Makefile
+@@ -38,14 +38,14 @@ NM= $(CROSS_COMPILE)nm
+ SIZE=$(CROSS_COMPILE)size
+ OBJCOPY=$(CROSS_COMPILE)objcopy
+ OBJDUMP=$(CROSS_COMPILE)objdump
+-CCFLAGS=-g -mcpu=arm9 -Os -Wall -D$(TARGET) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables
++CCFLAGS=-g -mcpu=arm9 -Os -Wall -D$(TARGET) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-stack-protector
+ ASFLAGS=-g -mcpu=arm9 -c -Os -Wall -D$(TARGET) -I$(INCL) -DTOP_OF_MEM=$(TOP_OF_MEMORY)
+ 
+ # Linker flags.
+ #  -Wl,...:     tell GCC to pass this to linker.
+ #    -Map:      create map file
+ #    --cref:    add cross reference to map file
+-LDFLAGS+=-nostartfiles -nostdlib -Wl,-Map=$(BOOT_NAME).map,--cref
++LDFLAGS+=-nostartfiles -nostdlib -Wl,-Map=$(BOOT_NAME).map,--cref -fno-PIE
+ LDFLAGS+=-T $(BOOTSTRAP_PATH)/elf32-littlearm.lds -Ttext $(LINK_ADDR)
+ ifdef MEMORY_BASE
+ LDFLAGS+=-Tdata $(MEMORY_BASE)
+diff --git a/board/at91sam9xeek/nandflash/Makefile b/board/at91sam9xeek/nandflash/Makefile
+index ff7d7df..3b29a2b 100644
+--- a/board/at91sam9xeek/nandflash/Makefile
++++ b/board/at91sam9xeek/nandflash/Makefile
+@@ -38,14 +38,14 @@ NM= $(CROSS_COMPILE)nm
+ SIZE=$(CROSS_COMPILE)size
+ OBJCOPY=$(CROSS_COMPILE)objcopy
+ OBJDUMP=$(CROSS_COMPILE)objdump
+-CCFLAGS=-g -mcpu=arm9 -Os -Wall -D$(TARGET) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables
++CCFLAGS=-g -mcpu=arm9 -Os -Wall -D$(TARGET) -I$(INCL) -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-stack-protector
+ ASFLAGS=-g -mcpu=arm9 -c -Os -Wall -D$(TARGET) -I$(INCL) -DTOP_OF_MEM=$(TOP_OF_MEMORY)
+ 
+ # Linker flags.
+ #  -Wl,...:     tell GCC to pass this to linker.
+ #    -Map:      create map file
+ #    --cref:    add cross reference to map file
+-LDFLAGS+=-nostartfiles -nostdlib -Wl,-Map=$(BOOT_NAME).map,--cref
++LDFLAGS+=-nostartfiles -nostdlib -Wl,-Map=$(BOOT_NAME).map,--cref -fno-PIE
+ LDFLAGS+=-T $(BOOTSTRAP_PATH)/elf32-littlearm.lds -Ttext $(LINK_ADDR)
+ ifdef MEMORY_BASE
+ LDFLAGS+=-Tdata $(MEMORY_BASE)
+-- 
+2.25.1
+