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Support for exception handling in linker scripts.

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This is needed even in plain C when 64 bit variable (e.g. long long int)
arithmetic is used. For example it is required when newlib is compiled with
--enable-newlib-io-long-long.

Conflicts:

	lib/stm32/f1/libopencm3_stm32f1.ld
	lib/stm32/f2/libopencm3_stm32f2.ld
This commit is contained in:
Tomaz Solc 2012-03-05 15:51:31 +01:00 committed by Piotr Esden-Tempski
parent c3038bc876
commit bf65589183
6 changed files with 34 additions and 33 deletions
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3
examples/stm32/f1/Makefile.include
View File

@ -31,7 +31,8 @@ TOOLCHAIN_DIR = ../../../../..
CFLAGS += -Os -g -Wall -Wextra -I$(TOOLCHAIN_DIR)/include \
-fno-common -mcpu=cortex-m3 -mthumb -msoft-float -MD -DSTM32F1
LDSCRIPT ?= $(BINARY).ld
LDFLAGS += -lc -lnosys -L$(TOOLCHAIN_DIR)/lib -L$(TOOLCHAIN_DIR)/lib/stm32/f1 \
LDFLAGS += -Wl,--start-group -lc -lgcc -lnosys -Wl,--end-group \
-L$(TOOLCHAIN_DIR)/lib -L$(TOOLCHAIN_DIR)/lib/stm32/f1 \
-T$(LDSCRIPT) -nostartfiles -Wl,--gc-sections \
-mthumb -march=armv7 -mfix-cortex-m3-ldrd -msoft-float
OBJS += $(BINARY).o

4
examples/stm32/f2/Makefile.include
View File

@ -32,8 +32,8 @@ TOOLCHAIN_DIR = ../../../../..
CFLAGS += -Os -g -Wall -Wextra -I$(TOOLCHAIN_DIR)/include \
-fno-common -mcpu=cortex-m3 -mthumb -msoft-float -MD -DSTM32F2
LDSCRIPT ?= $(BINARY).ld
LDFLAGS += -lc -lnosys -L$(TOOLCHAIN_DIR)/lib \
-L$(TOOLCHAIN_DIR)/lib/stm32/f2 \
LDFLAGS += -Wl,--start-group -lc -lgcc -lnosys -Wl,--end-group \
-L$(TOOLCHAIN_DIR)/lib -L$(TOOLCHAIN_DIR)/lib/stm32/f2 \
-T$(LDSCRIPT) -nostartfiles -Wl,--gc-sections \
-mthumb -march=armv7 -mfix-cortex-m3-ldrd -msoft-float
OBJS += $(BINARY).o

26
lib/stm32/f1/libopencm3_stm32f1.ld
View File

@ -40,17 +40,22 @@ SECTIONS
. = ALIGN(4);
} >rom
/* exception index - required due to libgcc.a issuing /0 exceptions */
__exidx_start = .;
/*
* Another section used by C++ stuff, appears when using newlib with
* 64bit (long long) printf support
*/
.ARM.extab : {
*(.ARM.extab*)
} >rom
.ARM.exidx : {
*(.ARM.exidx*)
} > rom
__exidx_end = .;
__exidx_start = .;
*(.ARM.exidx*)
__exidx_end = .;
} >rom
. = ORIGIN(ram);
_etext = .;
.data : {
.data : AT (__exidx_end) {
_data = .;
*(.data*) /* Read-write initialized data */
. = ALIGN(4);
@ -64,11 +69,6 @@ SECTIONS
_ebss = .;
} >ram
/* exception unwind data - required due to libgcc.a issuing /0 exceptions */
.ARM.extab : {
*(.ARM.extab*)
} >ram
. = ALIGN(4);
end = .;
}

4
lib/stm32/f1/vector.c
View File

@ -20,7 +20,7 @@
#define WEAK __attribute__ ((weak))
/* Symbols exported by the linker script(s). */
extern unsigned _etext, _data, _edata, _ebss, _stack;
extern unsigned __exidx_end, _data, _edata, _ebss, _stack;
void main(void);
void reset_handler(void);
@ -197,7 +197,7 @@ void reset_handler(void)
__asm__("MSR msp, %0" : : "r"(&_stack));
for (src = &_etext, dest = &_data; dest < &_edata; src++, dest++)
for (src = &__exidx_end, dest = &_data; dest < &_edata; src++, dest++)
*dest = *src;
while (dest < &_ebss)

26
lib/stm32/f2/libopencm3_stm32f2.ld
View File

@ -40,17 +40,22 @@ SECTIONS
. = ALIGN(4);
} >rom
/* exception index - required due to libgcc.a issuing /0 exceptions */
__exidx_start = .;
/*
* Another section used by C++ stuff, appears when using newlib with
* 64bit (long long) printf support
*/
.ARM.extab : {
*(.ARM.extab*)
} >rom
.ARM.exidx : {
*(.ARM.exidx*)
} > rom
__exidx_end = .;
__exidx_start = .;
*(.ARM.exidx*)
__exidx_end = .;
} >rom
. = ORIGIN(ram);
_etext = .;
.data : {
.data : AT (__exidx_end) {
_data = .;
*(.data*) /* Read-write initialized data */
. = ALIGN(4);
@ -64,11 +69,6 @@ SECTIONS
_ebss = .;
} >ram
/* exception unwind data - required due to libgcc.a issuing /0 exceptions */
.ARM.extab : {
*(.ARM.extab*)
} >ram
. = ALIGN(4);
end = .;
}

4
lib/stm32/f2/vector.c
View File

@ -21,7 +21,7 @@
#define WEAK __attribute__ ((weak))
/* Symbols exported by the linker script(s): */
extern unsigned _etext, _data, _edata, _ebss, _stack;
extern unsigned __exidx_end, _data, _edata, _ebss, _stack;
void main(void);
void reset_handler(void);
@ -224,7 +224,7 @@ void reset_handler(void)
__asm__("MSR msp, %0" : : "r"(&_stack));
for (src = &_etext, dest = &_data; dest < &_edata; src++, dest++)
for (src = &__exidx_end, dest = &_data; dest < &_edata; src++, dest++)
*dest = *src;
while (dest < &_ebss)