linker: Add ROM_SECTIONS location

Currently iterable sections as per the documentation are added with
zephyr_linker_sources(SECTIONS ...) after bss/noinit.
This commit allows putting sections after common-rom.

Signed-off-by: Pieter De Gendt <pieter.degendt@basalte.be>

boards/qemu/x86/qemu_x86_tiny.ld

@@ -420,6 +420,10 @@ SECTIONS
 	lnkr_pinned_rodata_start = .;
 
 #include <zephyr/linker/common-rom.ld>
+/* Located in generated directory. This file is populated by calling
+ * zephyr_linker_sources(ROM_SECTIONS ...). Useful for grouping iterable RO structs.
+ */
+#include <snippets-rom-sections.ld>
 #include <zephyr/linker/thread-local-storage.ld>
 
 	SECTION_PROLOGUE(pinned.rodata,,)
@@ -649,6 +653,10 @@ SECTIONS
 
 #ifndef CONFIG_LINKER_USE_PINNED_SECTION
 #include <zephyr/linker/common-rom.ld>
+/* Located in generated directory. This file is populated by calling
+ * zephyr_linker_sources(ROM_SECTIONS ...). Useful for grouping iterable RO structs.
+ */
+#include <snippets-rom-sections.ld>
 #include <zephyr/linker/thread-local-storage.ld>
 #endif
 

cmake/modules/extensions.cmake

@@ -1182,6 +1182,7 @@ endfunction(zephyr_check_compiler_flag_hardcoded)
 #    ROM_START     Inside the first output section of the image. This option is
 #                  currently only available on ARM Cortex-M, ARM Cortex-R,
 #                  x86, ARC, openisa_rv32m1, and RISC-V.
+#    ROM_SECTIONS  Inside the ROMABLE_REGION GROUP, not initialized.
 #    RAM_SECTIONS  Inside the RAMABLE_REGION GROUP, not initialized.
 #    DATA_SECTIONS Inside the RAMABLE_REGION GROUP, initialized.
 #    RAMFUNC_SECTION Inside the RAMFUNC RAMABLE_REGION GROUP, not initialized.
@@ -1210,8 +1211,8 @@ endfunction(zephyr_check_compiler_flag_hardcoded)
 #    _mysection_end = .;
 #    _mysection_size = ABSOLUTE(_mysection_end - _mysection_start);
 #
-# When placing into SECTIONS, RAM_SECTIONS or DATA_SECTIONS, the files must
+# When placing into SECTIONS, ROM_SECTIONS, RAM_SECTIONS or DATA_SECTIONS, the
-# instead define their own output sections to achieve the same thing:
+# files must instead define their own output sections to achieve the same thing:
 #    SECTION_PROLOGUE(.mysection,,)
 #    {
 #        _mysection_start = .;
@@ -1231,6 +1232,7 @@ function(zephyr_linker_sources location)
   # the global linker.ld.
   set(snippet_base       "${__build_dir}/include/generated")
   set(sections_path      "${snippet_base}/snippets-sections.ld")
+  set(rom_sections_path  "${snippet_base}/snippets-rom-sections.ld")
   set(ram_sections_path  "${snippet_base}/snippets-ram-sections.ld")
   set(data_sections_path "${snippet_base}/snippets-data-sections.ld")
   set(rom_start_path     "${snippet_base}/snippets-rom-start.ld")
@@ -1250,6 +1252,7 @@ function(zephyr_linker_sources location)
   get_property(cleared GLOBAL PROPERTY snippet_files_cleared)
   if (NOT DEFINED cleared)
     file(WRITE ${sections_path} "")
+    file(WRITE ${rom_sections_path} "")
     file(WRITE ${ram_sections_path} "")
     file(WRITE ${data_sections_path} "")
     file(WRITE ${rom_start_path} "")
@@ -1269,6 +1272,8 @@ function(zephyr_linker_sources location)
   # Choose destination file, based on the <location> argument.
   if ("${location}" STREQUAL "SECTIONS")
     set(snippet_path "${sections_path}")
+  elseif("${location}" STREQUAL "ROM_SECTIONS")
+    set(snippet_path "${rom_sections_path}")
   elseif("${location}" STREQUAL "RAM_SECTIONS")
     set(snippet_path "${ram_sections_path}")
   elseif("${location}" STREQUAL "DATA_SECTIONS")

include/zephyr/arch/arc/v2/linker.ld

@@ -106,6 +106,10 @@ SECTIONS {
 	__rodata_region_start = .;
 
 #include <zephyr/linker/common-rom.ld>
+/* Located in generated directory. This file is populated by calling
+ * zephyr_linker_sources(ROM_SECTIONS ...). Useful for grouping iterable RO structs.
+ */
+#include <snippets-rom-sections.ld>
 #ifdef __MWDT_LINKER_CMD__
 	SECTION_DATA_PROLOGUE(tdata,,)
 	{

include/zephyr/arch/arm/cortex_a_r/scripts/linker.ld

@@ -197,6 +197,10 @@ SECTIONS
     } GROUP_LINK_IN(ROMABLE_REGION)
 
 #include <zephyr/linker/common-rom.ld>
+/* Located in generated directory. This file is populated by calling
+ * zephyr_linker_sources(ROM_SECTIONS ...). Useful for grouping iterable RO structs.
+ */
+#include <snippets-rom-sections.ld>
 #include <zephyr/linker/thread-local-storage.ld>
 #include <zephyr/linker/cplusplus-rom.ld>
 

include/zephyr/arch/arm/cortex_m/scripts/linker.ld

@@ -202,6 +202,10 @@ SECTIONS
 	__rodata_region_start = .;
 
 #include <zephyr/linker/common-rom.ld>
+/* Located in generated directory. This file is populated by calling
+ * zephyr_linker_sources(ROM_SECTIONS ...). Useful for grouping iterable RO structs.
+ */
+#include <snippets-rom-sections.ld>
 #include <zephyr/linker/thread-local-storage.ld>
 
     SECTION_PROLOGUE(_RODATA_SECTION_NAME,,)

include/zephyr/arch/arm64/scripts/linker.ld

@@ -170,6 +170,10 @@ SECTIONS
         __rodata_region_start = .;
 
 #include <zephyr/linker/common-rom.ld>
+/* Located in generated directory. This file is populated by calling
+ * zephyr_linker_sources(ROM_SECTIONS ...). Useful for grouping iterable RO structs.
+ */
+#include <snippets-rom-sections.ld>
 #include <zephyr/linker/thread-local-storage.ld>
 
     SECTION_PROLOGUE(_RODATA_SECTION_NAME,,)

include/zephyr/arch/mips/linker.ld

@@ -79,6 +79,10 @@ SECTIONS
 
     __rodata_region_start = .;
 #include <zephyr/linker/common-rom.ld>
+/* Located in generated directory. This file is populated by calling
+ * zephyr_linker_sources(ROM_SECTIONS ...). Useful for grouping iterable RO structs.
+ */
+#include <snippets-rom-sections.ld>
 #include <zephyr/linker/thread-local-storage.ld>
 
     SECTION_PROLOGUE(_RODATA_SECTION_NAME,,)

include/zephyr/arch/nios2/linker.ld

@@ -143,6 +143,10 @@ SECTIONS
     __rodata_region_start = .;
 
 #include <zephyr/linker/common-rom.ld>
+/* Located in generated directory. This file is populated by calling
+ * zephyr_linker_sources(ROM_SECTIONS ...). Useful for grouping iterable RO structs.
+ */
+#include <snippets-rom-sections.ld>
 
     SECTION_PROLOGUE(_RODATA_SECTION_NAME,,)
         {

include/zephyr/arch/posix/linker.ld

@@ -34,6 +34,10 @@ SECTION_PROLOGUE(rom_start,,)
 } GROUP_LINK_IN(ROMABLE_REGION)
 
 #include <zephyr/linker/common-rom.ld>
+/* Located in generated directory. This file is populated by calling
+ * zephyr_linker_sources(ROM_SECTIONS ...). Useful for grouping iterable RO structs.
+ */
+#include <snippets-rom-sections.ld>
 
 SECTION_PROLOGUE(_RODATA_SECTION_NAME,,)
 {

include/zephyr/arch/riscv/common/linker.ld

@@ -190,6 +190,10 @@ SECTIONS
 
 	__rodata_region_start = .;
 #include <zephyr/linker/common-rom.ld>
+/* Located in generated directory. This file is populated by calling
+ * zephyr_linker_sources(ROM_SECTIONS ...). Useful for grouping iterable RO structs.
+ */
+#include <snippets-rom-sections.ld>
 #include <zephyr/linker/thread-local-storage.ld>
 
     SECTION_PROLOGUE(_RODATA_SECTION_NAME,,)

include/zephyr/arch/sparc/linker.ld

@@ -46,6 +46,10 @@ SECTIONS
     __rodata_region_start = .;
 
 #include <zephyr/linker/common-rom.ld>
+/* Located in generated directory. This file is populated by calling
+ * zephyr_linker_sources(ROM_SECTIONS ...). Useful for grouping iterable RO structs.
+ */
+#include <snippets-rom-sections.ld>
 #include <zephyr/linker/thread-local-storage.ld>
 
     SECTION_PROLOGUE(_RODATA_SECTION_NAME,,)

include/zephyr/arch/x86/ia32/linker.ld

@@ -215,6 +215,10 @@ SECTIONS
 	lnkr_pinned_rodata_start = .;
 
 #include <zephyr/linker/common-rom.ld>
+/* Located in generated directory. This file is populated by calling
+ * zephyr_linker_sources(ROM_SECTIONS ...). Useful for grouping iterable RO structs.
+ */
+#include <snippets-rom-sections.ld>
 #include <zephyr/linker/thread-local-storage.ld>
 
 	SECTION_PROLOGUE(pinned.rodata,,)
@@ -350,6 +354,10 @@ SECTIONS
 
 #ifndef CONFIG_LINKER_USE_PINNED_SECTION
 #include <zephyr/linker/common-rom.ld>
+/* Located in generated directory. This file is populated by calling
+ * zephyr_linker_sources(ROM_SECTIONS ...). Useful for grouping iterable RO structs.
+ */
+#include <snippets-rom-sections.ld>
 #include <zephyr/linker/thread-local-storage.ld>
 #endif
 

include/zephyr/arch/x86/intel64/linker.ld

@@ -105,6 +105,10 @@ SECTIONS
 	__rodata_region_start = .;
 
 	#include <zephyr/linker/common-rom.ld>
+	/* Located in generated directory. This file is populated by calling
+	 * zephyr_linker_sources(ROM_SECTIONS ...). Useful for grouping iterable RO structs.
+	 */
+	#include <snippets-rom-sections.ld>
 	#include <zephyr/linker/thread-local-storage.ld>
 
 	SECTION_PROLOGUE(_RODATA_SECTION_NAME,,)

soc/andestech/ae350/linker.ld

@@ -156,6 +156,10 @@ SECTIONS
 
 	__rodata_region_start = .;
 #include <zephyr/linker/common-rom.ld>
+/* Located in generated directory. This file is populated by calling
+ * zephyr_linker_sources(ROM_SECTIONS ...). Useful for grouping iterable RO structs.
+ */
+#include <snippets-rom-sections.ld>
 #include <zephyr/linker/thread-local-storage.ld>
 
     SECTION_PROLOGUE(_RODATA_SECTION_NAME,,)

soc/cdns/dc233c/include/xtensa-dc233c.ld

@@ -235,6 +235,10 @@ SECTIONS
   } >RAMABLE_REGION
 
 #include <zephyr/linker/common-rom.ld>
+/* Located in generated directory. This file is populated by calling
+ * zephyr_linker_sources(ROM_SECTIONS ...). Useful for grouping iterable RO structs.
+ */
+#include <snippets-rom-sections.ld>
 
 #include <zephyr/linker/thread-local-storage.ld>
 

soc/cdns/xtensa_sample_controller/include/xtensa-sample-controller.ld

@@ -445,6 +445,10 @@ SECTIONS
   } >RAM :sram0_phdr
 
 #include <zephyr/linker/common-rom.ld>
+/* Located in generated directory. This file is populated by calling
+ * zephyr_linker_sources(ROM_SECTIONS ...). Useful for grouping iterable RO structs.
+ */
+#include <snippets-rom-sections.ld>
 
   .rodata : ALIGN(4)
   {

soc/intel/intel_adsp/ace/ace-link.ld

@@ -378,6 +378,11 @@ SECTIONS {
 
   __common_rom_region_start = SEGSTART_CACHED;
 #include <zephyr/linker/common-rom.ld>
+/* Located in generated directory. This file is populated by calling
+ * zephyr_linker_sources(ROM_SECTIONS ...). Useful for grouping iterable RO structs.
+ */
+#include <snippets-rom-sections.ld>
+   __rodata_region_end = .;
   __common_rom_region_end = .;
     __rodata_region_end = .;
 

soc/intel/intel_adsp/cavs/include/xtensa-cavs-linker.ld

@@ -323,6 +323,10 @@ SECTIONS {
 #define RAMABLE_REGION RAM
 #define ROMABLE_REGION RAM
 #include <zephyr/linker/common-rom.ld>
+/* Located in generated directory. This file is populated by calling
+ * zephyr_linker_sources(ROM_SECTIONS ...). Useful for grouping iterable RO structs.
+ */
+#include <snippets-rom-sections.ld>
 
   .fw_ready : {
     KEEP(*(".fw_ready"));

soc/ite/ec/it8xxx2/linker.ld

@@ -201,6 +201,10 @@ SECTIONS
 
 	__rodata_region_start = .;
 #include <zephyr/linker/common-rom.ld>
+/* Located in generated directory. This file is populated by calling
+ * zephyr_linker_sources(ROM_SECTIONS ...). Useful for grouping iterable RO structs.
+ */
+#include <snippets-rom-sections.ld>
 #include <zephyr/linker/thread-local-storage.ld>
 
     SECTION_PROLOGUE(_RODATA_SECTION_NAME,,)

soc/nxp/imx/imx8/adsp/linker.ld

@@ -365,6 +365,10 @@ SECTIONS
   } >sdram0 :sdram0_phdr
 
 #include <zephyr/linker/common-rom.ld>
+/* Located in generated directory. This file is populated by calling
+ * zephyr_linker_sources(ROM_SECTIONS ...). Useful for grouping iterable RO structs.
+ */
+#include <snippets-rom-sections.ld>
 
   .fw_ready : ALIGN(4)
   {

soc/nxp/imx/imx8m/adsp/linker.ld

@@ -371,6 +371,10 @@ SECTIONS
   } >sdram0 :sdram0_phdr
 
 #include <zephyr/linker/common-rom.ld>
+/* Located in generated directory. This file is populated by calling
+ * zephyr_linker_sources(ROM_SECTIONS ...). Useful for grouping iterable RO structs.
+ */
+#include <snippets-rom-sections.ld>
 
   .fw_ready : ALIGN(4)
   {

soc/nxp/imx/imx8ulp/adsp/linker.ld

@@ -365,6 +365,10 @@ SECTIONS
   } >sdram0 :sdram0_phdr
 
 #include <zephyr/linker/common-rom.ld>
+/* Located in generated directory. This file is populated by calling
+ * zephyr_linker_sources(ROM_SECTIONS ...). Useful for grouping iterable RO structs.
+ */
+#include <snippets-rom-sections.ld>
 
   .fw_ready : ALIGN(4)
   {

soc/nxp/imx/imx8x/adsp/linker.ld

@@ -365,6 +365,10 @@ SECTIONS
   } >sdram0 :sdram0_phdr
 
 #include <zephyr/linker/common-rom.ld>
+/* Located in generated directory. This file is populated by calling
+ * zephyr_linker_sources(ROM_SECTIONS ...). Useful for grouping iterable RO structs.
+ */
+#include <snippets-rom-sections.ld>
 
   .fw_ready : ALIGN(4)
   {

soc/nxp/imx/imx9/a55/linker.ld

@@ -161,6 +161,10 @@ SECTIONS
         __rodata_region_start = .;
 
 #include <zephyr/linker/common-rom.ld>
+/* Located in generated directory. This file is populated by calling
+ * zephyr_linker_sources(ROM_SECTIONS ...). Useful for grouping iterable RO structs.
+ */
+#include <snippets-rom-sections.ld>
 #include <zephyr/linker/thread-local-storage.ld>
 
     SECTION_PROLOGUE(_RODATA_SECTION_NAME,,)

soc/nxp/imxrt/imxrt5xx/f1/linker.ld

@@ -326,6 +326,10 @@ SECTIONS
   } >iram_text_start :iram_text_start_phdr
 
 #include <zephyr/linker/common-rom.ld>
+/* Located in generated directory. This file is populated by calling
+ * zephyr_linker_sources(ROM_SECTIONS ...). Useful for grouping iterable RO structs.
+ */
+#include <snippets-rom-sections.ld>
 
   .fw_ready : ALIGN(4)
   {

soc/openisa/rv32m1/linker.ld

@@ -125,6 +125,10 @@ SECTIONS
     __rodata_region_start = .;
 
 #include <zephyr/linker/common-rom.ld>
+/* Located in generated directory. This file is populated by calling
+ * zephyr_linker_sources(ROM_SECTIONS ...). Useful for grouping iterable RO structs.
+ */
+#include <snippets-rom-sections.ld>
 #include <zephyr/linker/thread-local-storage.ld>
 
     SECTION_PROLOGUE(_RODATA_SECTION_NAME,,)