linker: align _image_text_start/end/size linker symbols name

Cleanup and preparation commit for linker script generator.

Zephyr linker scripts provides start and end symbols for each larger
areas in the linker script.

The symbols _image_text_start and _image_text_end sometimes includes
linker/kobject-text.ld. This mean there must be both the regular
__text_start and __text_end symbols for the pure text section, as well
as <group>_start and <group>_end symbols.

The symbols describing the text region which covers more than just the
text section itself will thus be changed to:
_image_text_start -> __text_region_start
_image_text_end   -> __text_region_end

Signed-off-by: Torsten Rasmussen <Torsten.Rasmussen@nordicsemi.no>

arch/arm64/core/mmu.c

@@ -645,8 +645,8 @@ static const struct arm_mmu_flat_range mmu_zephyr_ranges[] = {
 
 	/* Mark text segment cacheable,read only and executable */
 	{ .name  = "zephyr_code",
-	  .start = _image_text_start,
+	  .start = __text_region_start,
-	  .end   = _image_text_end,
+	  .end   = __text_region_end,
 	  .attrs = MT_NORMAL | MT_P_RX_U_RX | MT_DEFAULT_SECURE_STATE },
 
 	/* Mark rodata segment cacheable, read only and execute-never */

arch/x86/gen_mmu.py

@@ -22,7 +22,7 @@ If CONFIG_SRAM_REGION_PERMISSIONS is enabled, the access permissions
 vary:
   - By default, the Present, Write, and Execute Disable bits are
     set.
-  - The _image_text region will have Present and User bits set
+  - The __text_region region will have Present and User bits set
   - The __rodata_region region will have Present, User, and Execute
     Disable bits set
   - On x86_64, the _locore region will have Present set and
@@ -866,7 +866,7 @@ def main():
         if is_generic_section_present:
             flags = flags | FLAG_P
 
-        pt.set_region_perms("_image_text", flags)
+        pt.set_region_perms("__text_region", flags)
 
         if isdef("CONFIG_LINKER_USE_BOOT_SECTION"):
             pt.set_region_perms("lnkr_boot_text", flags | FLAG_P)

boards/x86/qemu_x86/qemu_x86_tiny.ld

@@ -556,7 +556,7 @@ SECTIONS
 
 	SECTION_PROLOGUE(_TEXT_SECTION_NAME,,)
 	{
-	_image_text_start = .;
+	__text_region_start = .;
 
 #if !defined(CONFIG_LINKER_USE_BOOT_SECTION) || \
     !defined(CONFIG_LINKER_USE_PINNED_SECTION)
@@ -588,8 +588,8 @@ SECTIONS
 	MMU_PAGE_ALIGN_PERM
 	} GROUP_ROM_LINK_IN(RAMABLE_REGION, ROMABLE_REGION)
 
-	_image_text_end = .;
+	__text_region_end = .;
-	_image_text_size = _image_text_end - _image_text_start;
+	__text_region_size = __text_region_end - __text_region_start;
 	__rodata_region_start = .;
 
 #ifndef CONFIG_LINKER_USE_PINNED_SECTION

include/arch/arc/v2/linker.ld

@@ -75,7 +75,7 @@ SECTIONS {
 
 	SECTION_PROLOGUE(_TEXT_SECTION_NAME,,ALIGN(1024)) {
 		__rom_region_start = .;
-		_image_text_start = .;
+		__text_region_start = .;
 
 /* Located in generated directory. This file is populated by the
  * zephyr_linker_sources() Cmake function.
@@ -95,7 +95,7 @@ SECTIONS {
 	} GROUP_LINK_IN(ROMABLE_REGION)
 #endif /* CONFIG_CPLUSPLUS && !CONFIG_CPP_STATIC_INIT_GNU && __MWDT_LINKER_CMD__ */
 
-	_image_text_end = .;
+	__text_region_end = .;
 	__rodata_region_start = .;
 
 #include <linker/common-rom.ld>

include/arch/arm/aarch32/cortex_a_r/scripts/linker.ld

@@ -127,7 +127,7 @@ SECTIONS
 
     SECTION_PROLOGUE(_TEXT_SECTION_NAME,,)
     {
-        _image_text_start = .;
+        __text_region_start = .;
 
 #include <linker/kobject-text.ld>
 
@@ -143,7 +143,7 @@ SECTIONS
 
     } GROUP_LINK_IN(ROMABLE_REGION)
 
-    _image_text_end = .;
+    __text_region_end = .;
 
 #if defined (CONFIG_CPLUSPLUS)
     SECTION_PROLOGUE(.ARM.extab,,)
@@ -205,12 +205,12 @@ SECTIONS
          * RODATA must be the last section so that the size of the entire read
          * only area will be filled to a power of 2.
          */
-        MPU_ALIGN(ABSOLUTE(.) - _image_rom_start);
+        MPU_ALIGN(ABSOLUTE(.) - __rom_region_start);
     } GROUP_LINK_IN(ROMABLE_REGION)
 
     __rodata_region_end = .;
-    _image_rom_end = .;
+    __rom_region_end = .;
-    _image_rom_end_order = (LOG2CEIL(_image_rom_end) - 1) << 1;
+    _image_rom_end_order = (LOG2CEIL(__rom_region_end) - 1) << 1;
 
     GROUP_END(ROMABLE_REGION)
 

include/arch/arm/aarch32/cortex_m/scripts/linker.ld

@@ -145,7 +145,7 @@ SECTIONS
 
     SECTION_PROLOGUE(_TEXT_SECTION_NAME,,)
 	{
-	_image_text_start = .;
+	__text_region_start = .;
 
 #include <linker/kobject-text.ld>
 
@@ -162,7 +162,7 @@ SECTIONS
 
 	} GROUP_LINK_IN(ROMABLE_REGION)
 
-	_image_text_end = .;
+	__text_region_end = .;
 
 #if defined (CONFIG_CPLUSPLUS)
 	SECTION_PROLOGUE(.ARM.extab,,)

include/arch/arm64/scripts/linker.ld

@@ -93,7 +93,7 @@ SECTIONS
 
     SECTION_PROLOGUE(_TEXT_SECTION_NAME,,)
     {
-        _image_text_start = .;
+        __text_region_start = .;
 #ifndef CONFIG_XIP
         z_mapped_start = .;
 #endif
@@ -126,8 +126,8 @@ SECTIONS
         MMU_ALIGN;
     } GROUP_ROM_LINK_IN(RAMABLE_REGION, ROMABLE_REGION)
 
-    _image_text_end = .;
+    __text_region_end = .;
-    _image_text_size = _image_text_end - _image_text_start;
+    __text_region_size = __text_region_end - __text_region_start;
 
 #if defined (CONFIG_CPLUSPLUS)
     SECTION_PROLOGUE(.ARM.extab,,)

include/arch/riscv/common/linker.ld

@@ -145,7 +145,7 @@ SECTIONS
 		KEEP(*(.openocd_debug))
 		KEEP(*(".openocd_debug.*"))
 
-		_image_text_start = .;
+		__text_region_start = .;
 
 		*(.text)
 		*(".text.*")
@@ -161,7 +161,7 @@ SECTIONS
 #endif
 	} GROUP_LINK_IN(ROMABLE_REGION)
 
-    _image_text_end = .;
+    __text_region_end = .;
 
 	__rodata_region_start = .;
 #include <linker/common-rom.ld>

include/arch/sparc/linker.ld

@@ -30,7 +30,7 @@ SECTIONS
 	{
 		/* Trap table alignment required by SPARC V8 specification. */
 		. = ALIGN(0x1000);
-		_image_text_start = .;
+		__text_region_start = .;
 
 		*(.text.traptable)
 		*(.text)
@@ -39,7 +39,7 @@ SECTIONS
 		*(.gnu.linkonce.t.*)
 	} GROUP_LINK_IN(REGION_TEXT)
 
-    _image_text_end = .;
+    __text_region_end = .;
     __rodata_region_start = .;
 
 #include <linker/common-rom.ld>

include/arch/x86/ia32/linker.ld

@@ -293,7 +293,7 @@ SECTIONS
 #endif
 	SECTION_PROLOGUE(_TEXT_SECTION_NAME,,)
 	{
-	_image_text_start = .;
+	__text_region_start = .;
 
 #if !defined(CONFIG_LINKER_USE_BOOT_SECTION) || \
     !defined(CONFIG_LINKER_USE_PINNED_SECTION)
@@ -327,8 +327,8 @@ SECTIONS
 	MMU_PAGE_ALIGN_PERM
 	} GROUP_ROM_LINK_IN(RAMABLE_REGION, ROMABLE_REGION)
 
-	_image_text_end = .;
+	__text_region_end = .;
-	_image_text_size = _image_text_end - _image_text_start;
+	__text_region_size = __text_region_end - __text_region_start;
 	__rodata_region_start = .;
 
 #ifndef CONFIG_LINKER_USE_PINNED_SECTION

include/arch/x86/intel64/linker.ld

@@ -89,7 +89,7 @@ SECTIONS
 	{
 	. = ALIGN(16);
 	__rom_region_start = .;
-	_image_text_start = .;
+	__text_region_start = .;
 	z_mapped_start = .;
 	*(.text)
 	*(.text.*)
@@ -99,8 +99,8 @@ SECTIONS
 	MMU_PAGE_ALIGN_PERM
 	} GROUP_ROM_LINK_IN(RAMABLE_REGION, ROMABLE_REGION)
 
-	_image_text_end = .;
+	__text_region_end = .;
-	_image_text_size = _image_text_end - _image_text_start;
+	__text_region_size = __text_region_end - __text_region_start;
 	__rodata_region_start = .;
 
 	#include <linker/common-rom.ld>

include/linker/linker-defs.h

@@ -247,9 +247,9 @@ extern char _flash_used[];
 extern char _image_ram_start[];
 extern char _image_ram_end[];
 
-extern char _image_text_start[];
+extern char __text_region_start[];
-extern char _image_text_end[];
+extern char __text_region_end[];
-extern char _image_text_size[];
+extern char __text_region_size[];
 
 extern char __rodata_region_start[];
 extern char __rodata_region_end[];

soc/arm64/arm/fvp_aemv8r/arm_mpu_regions.c

@@ -21,8 +21,8 @@ static const struct arm_mpu_region mpu_regions[] = {
 
 	/* Region 1 zephyr text */
 	MPU_REGION_ENTRY("SRAM_0",
-			 (uintptr_t)_image_text_start,
+			 (uintptr_t)__text_region_start,
-			 (uintptr_t)_image_text_end,
+			 (uintptr_t)__text_region_end,
 			 REGION_RAM_TEXT_ATTR),
 
 	/* Region 2 zephyr rodata */

soc/riscv/openisa_rv32m1/linker.ld

@@ -110,14 +110,14 @@ SECTIONS
  */
 #include <snippets-rom-start.ld>
 
-	_image_text_start = .;
+	__text_region_start = .;
 
 	*(.text .text.*)
 	*(.gnu.linkonce.t.*)
 	*(.eh_frame)
 	} GROUP_LINK_IN(ROM)
 
-    _image_text_end = .;
+    __text_region_end = .;
 
     __rodata_region_start = .;
 

soc/xtensa/sample_controller/linker.ld

@@ -484,7 +484,7 @@ SECTIONS
     _sram_text_end = ABSOLUTE(.);
   } >sram0_seg :sram0_phdr
 
-  _image_text_start =  ALIGN(4);
+  __text_region_start =  ALIGN(4);
   .text : ALIGN(4)
   {
     _stext = .;
@@ -499,7 +499,7 @@ SECTIONS
     _text_end = ABSOLUTE(.);
     _etext = .;
   } >sram0_seg :sram0_phdr
-  _image_text_end = .;
+  __text_region_end = .;
 
   .sram.data : ALIGN(4)
   {

tests/arch/x86/pagetables/src/main.c

@@ -97,7 +97,7 @@ void test_ram_perms(void)
 
 		if (!IS_ENABLED(CONFIG_SRAM_REGION_PERMISSIONS)) {
 			expected = MMU_P | MMU_RW;
-		} else if (IN_REGION(_image_text, pos)) {
+		} else if (IN_REGION(__text_region, pos)) {
 			expected = MMU_P | MMU_US;
 		} else if (IN_REGION(__rodata_region, pos)) {
 			expected = MMU_P | MMU_US | MMU_XD;