Support exceptions on all targets

lib/lm3s/libopencm3_lm3s.ld

@@ -36,9 +36,24 @@ SECTIONS
 		. = ALIGN(4);
 		*(.rodata*)	/* Read-only data */
 		. = ALIGN(4);
-		_etext = .;
 	} >rom
 
+	/*
+	 * Another section used by C++ stuff, appears when using newlib with
+	 * 64bit (long long) printf support
+	 */
+	.ARM.extab : {
+		*(.ARM.extab*)
+	} >rom
+	.ARM.exidx : {
+		__exidx_start = .;
+		*(.ARM.exidx*)
+		__exidx_end = .;
+	} >rom
+
+	. = ALIGN(4);
+	_etext = .;
+
 	.data : {
 		_data = .;
 		*(.data*)	/* Read-write initialized data */
@@ -60,12 +75,6 @@ SECTIONS
 	 */
 	/DISCARD/ : { *(.eh_frame) }
 
-	/*
-	 * Another section used by C++ stuff, appears when using newlib with
-	 * 64bit (long long) printf support - discard it for now.
-	 */
-	/DISCARD/ : { *(.ARM.exidx) }
-
 	. = ALIGN(4);
 	end = .;
 }

lib/lpc13xx/libopencm3_lpc13xx.ld

@@ -36,9 +36,24 @@ SECTIONS
 		. = ALIGN(4);
 		*(.rodata*)	/* Read-only data */
 		. = ALIGN(4);
-		_etext = .;
 	} >rom
 
+	/*
+	 * Another section used by C++ stuff, appears when using newlib with
+	 * 64bit (long long) printf support
+	 */
+	.ARM.extab : {
+		*(.ARM.extab*)
+	} >rom
+	.ARM.exidx : {
+		__exidx_start = .;
+		*(.ARM.exidx*)
+		__exidx_end = .;
+	} >rom
+
+	. = ALIGN(4);
+	_etext = .;
+
 	.data : {
 		_data = .;
 		*(.data*)	/* Read-write initialized data */
@@ -60,12 +75,6 @@ SECTIONS
 	 */
 	/DISCARD/ : { *(.eh_frame) }
 
-	/*
-	 * Another section used by C++ stuff, appears when using newlib with
-	 * 64bit (long long) printf support - discard it for now.
-	 */
-	/DISCARD/ : { *(.ARM.exidx) }
-
 	. = ALIGN(4);
 	end = .;
 }

lib/lpc17xx/libopencm3_lpc17xx.ld

@@ -36,9 +36,24 @@ SECTIONS
 		. = ALIGN(4);
 		*(.rodata*)	/* Read-only data */
 		. = ALIGN(4);
-		_etext = .;
 	} >rom
 
+	/*
+	 * Another section used by C++ stuff, appears when using newlib with
+	 * 64bit (long long) printf support
+	 */
+	.ARM.extab : {
+		*(.ARM.extab*)
+	} >rom
+	.ARM.exidx : {
+		__exidx_start = .;
+		*(.ARM.exidx*)
+		__exidx_end = .;
+	} >rom
+
+	. = ALIGN(4);
+	_etext = .;
+
 	.data : {
 		_data = .;
 		*(.data*)	/* Read-write initialized data */
@@ -60,12 +75,6 @@ SECTIONS
 	 */
 	/DISCARD/ : { *(.eh_frame) }
 
-	/*
-	 * Another section used by C++ stuff, appears when using newlib with
-	 * 64bit (long long) printf support - discard it for now.
-	 */
-	/DISCARD/ : { *(.ARM.exidx) }
-
 	. = ALIGN(4);
 	end = .;
 }

lib/lpc43xx/libopencm3_lpc43xx.ld

@@ -42,12 +42,18 @@ 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 : {
+		__exidx_start = .;
 		*(.ARM.exidx*)
-	} > rom
+		__exidx_end = .;
-	__exidx_end = .;
+	} >rom
 
 	. = ALIGN(4);
 	_etext = .;
@@ -69,23 +75,12 @@ SECTIONS
 		_ebss = .;
 	} >ram
 
-	/* exception unwind data - required due to libgcc.a issuing /0 exceptions */
-	.ARM.extab : {
-		*(.ARM.extab*)
-	} >ram
-
 	/*
 	 * The .eh_frame section appears to be used for C++ exception handling.
 	 * You may need to fix this if you're using C++.
 	 */
 	/DISCARD/ : { *(.eh_frame) }
 
-	/*
-	 * Another section used by C++ stuff, appears when using newlib with
-	 * 64bit (long long) printf support - discard it for now.
-	 */
-	/DISCARD/ : { *(.ARM.exidx) }
-
 	. = ALIGN(4);
 	end = .;
 

lib/lpc43xx/libopencm3_lpc43xx_rom_to_ram.ld

@@ -43,12 +43,18 @@ 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 : {
+		__exidx_start = .;
 		*(.ARM.exidx*)
-	} > rom
+		__exidx_end = .;
-	__exidx_end = .;
+	} >rom
 
 	. = ALIGN(4);
 	_etext = .;
@@ -70,24 +76,12 @@ SECTIONS
 		_ebss = .;
 	} >ram_data
 
-	/* exception unwind data - required due to libgcc.a issuing /0 exceptions */
-	.ARM.extab : {
-		. = _ebss;
-		*(.ARM.extab*)
-	} >ram_data
-
 	/*
 	 * The .eh_frame section appears to be used for C++ exception handling.
 	 * You may need to fix this if you're using C++.
 	 */
 	/DISCARD/ : { *(.eh_frame) }
 
-	/*
-	 * Another section used by C++ stuff, appears when using newlib with
-	 * 64bit (long long) printf support - discard it for now.
-	 */
-	/DISCARD/ : { *(.ARM.exidx) }
-
 	. = ALIGN(4);
 	end = .;
 

lib/stm32/f1/libopencm3_stm32f1.ld

@@ -36,7 +36,6 @@ SECTIONS
 		. = ALIGN(4);
 		*(.rodata*)	/* Read-only data */
 		. = ALIGN(4);
-		_etext = .;
 	} >rom
 
 	/*
@@ -52,6 +51,9 @@ SECTIONS
 		__exidx_end = .;
 	} >rom
 
+	. = ALIGN(4);
+	_etext = .;
+
 	.data : {
 		_data = .;
 		*(.data*)	/* Read-write initialized data */

lib/stm32/f2/libopencm3_stm32f2.ld

@@ -36,7 +36,6 @@ SECTIONS
 		. = ALIGN(4);
 		*(.rodata*)	/* Read-only data */
 		. = ALIGN(4);
-		_etext = .;
 	} >rom
 
 	/*
@@ -52,6 +51,9 @@ SECTIONS
 		__exidx_end = .;
 	} >rom
 
+	. = ALIGN(4);
+	_etext = .;
+
 	.data : {
 		_data = .;
 		*(.data*)	/* Read-write initialized data */

lib/stm32/f4/libopencm3_stm32f4.ld

@@ -38,13 +38,18 @@ 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*)
+		__exidx_start = .;
-	} > rom
+		*(.ARM.exidx*)
-	__exidx_end = .;
+		__exidx_end = .;
-
+	} >rom
 
 	. = ALIGN(4);
 	_etext = .;
@@ -64,10 +69,11 @@ SECTIONS
 		_ebss = .;
 	} >ram
 
-	/* exception unwind data - required due to libgcc.a issuing /0 exceptions */
+	/*
-	.ARM.extab : {
+	 * The .eh_frame section appears to be used for C++ exception handling.
-		*(.ARM.extab*)
+	 * You may need to fix this if you're using C++.
-	} >ram
+	 */
+	/DISCARD/ : { *(.eh_frame) }
 
 	. = ALIGN(4);
 	end = .;