diff --git a/os/common/startup/ARM/compilers/GCC/ld/rules.ld b/os/common/startup/ARM/compilers/GCC/ld/rules.ld
index 42716d609..79d563491 100644
--- a/os/common/startup/ARM/compilers/GCC/ld/rules.ld
+++ b/os/common/startup/ARM/compilers/GCC/ld/rules.ld
@@ -96,9 +96,11 @@ SECTIONS
     } > flash
 
     .ARM.exidx : {
-        PROVIDE(__exidx_base__ = .);
+        __exidx_base__ = .;
+        __exidx_start = .;
         *(.ARM.exidx* .gnu.linkonce.armexidx.*)
-        PROVIDE(__exidx_end__ = .);
+        __exidx_end__ = .;
+        __exidx_end = .;
      } > flash
 
     .eh_frame_hdr :
diff --git a/os/common/startup/ARMCMx-SB/compilers/GCC/crt0.S b/os/common/startup/ARMCMx-SB/compilers/GCC/crt0.S
index 0e27ca88c..dcb0e4273 100644
--- a/os/common/startup/ARMCMx-SB/compilers/GCC/crt0.S
+++ b/os/common/startup/ARMCMx-SB/compilers/GCC/crt0.S
@@ -130,9 +130,9 @@ upsloop:
 #if CRT0_INIT_DATA == TRUE
                 /* Data initialization. Note, it assumes that the DATA size
                   is a multiple of 4 so the linker file must ensure this.*/
-                ldr     r1, =_textdata_start
-                ldr     r2, =_data_start
-                ldr     r3, =_data_end
+                ldr     r1, =__textdata_base__
+                ldr     r2, =__data_base__
+                ldr     r3, =__data_end__
 dloop:
                 cmp     r2, r3
                 ittt    lo
@@ -145,8 +145,8 @@ dloop:
                 /* BSS initialization. Note, it assumes that the DATA size
                   is a multiple of 4 so the linker file must ensure this.*/
                 movs    r0, #0
-                ldr     r1, =_bss_start
-                ldr     r2, =_bss_end
+                ldr     r1, =__bss_base__
+                ldr     r2, =__bss_end__
 bloop:
                 cmp     r1, r2
                 itt     lo
@@ -156,8 +156,8 @@ bloop:
 
 #if CRT0_CALL_CONSTRUCTORS == TRUE
                 /* Constructors invocation.*/
-                ldr     r4, =__init_array_start
-                ldr     r5, =__init_array_end
+                ldr     r4, =__init_array_base__
+                ldr     r5, =__init_array_end__
 initloop:
                 cmp     r4, r5
                 bge     endinitloop
@@ -172,8 +172,8 @@ endinitloop:
 
 #if CRT0_CALL_DESTRUCTORS == TRUE
                 /* Destructors invocation.*/
-                ldr     r4, =__fini_array_start
-                ldr     r5, =__fini_array_end
+                ldr     r4, =__fini_array_base__
+                ldr     r5, =__fini_array_end__
 finiloop:
                 cmp     r4, r5
                 bge     endfiniloop
diff --git a/os/common/startup/ARMCMx-SB/compilers/GCC/ld/rules_code.ld b/os/common/startup/ARMCMx-SB/compilers/GCC/ld/rules_code.ld
index bdfd2e527..656841029 100644
--- a/os/common/startup/ARMCMx-SB/compilers/GCC/ld/rules_code.ld
+++ b/os/common/startup/ARMCMx-SB/compilers/GCC/ld/rules_code.ld
@@ -25,25 +25,25 @@ SECTIONS
 
     .xtors : ALIGN(4)
     {
-        __init_array_start = .;
+        __init_array_base__ = .;
         KEEP(*(SORT(.init_array.*)))
         KEEP(*(.init_array))
-        __init_array_end = .;
-        __fini_array_start = .;
+        __init_array_end__ = .;
+        __fini_array_base__ = .;
         KEEP(*(.fini_array))
         KEEP(*(SORT(.fini_array.*)))
-        __fini_array_end = .;
+        __fini_array_end__ = .;
     } > CODE_SPACE
 
-    .text : ALIGN(4)
+    .text : ALIGN_WITH_INPUT
     {
-        __text_base = .;
+        __text_base__ = .;
         *(.text)
         *(.text.*)
         *(.glue_7t)
         *(.glue_7)
         *(.gcc*)
-        __text_end = .;
+        __text_end__ = .;
     } > CODE_SPACE
 
     .rodata : ALIGN(4)
@@ -61,8 +61,10 @@ SECTIONS
     } > CODE_SPACE
 
     .ARM.exidx : {
+        __exidx_base__ = .;
         __exidx_start = .;
         *(.ARM.exidx* .gnu.linkonce.armexidx.*)
+        __exidx_end__ = .;
         __exidx_end = .;
      } > CODE_SPACE
 
diff --git a/os/common/startup/ARMCMx-SB/compilers/GCC/ld/rules_data.ld b/os/common/startup/ARMCMx-SB/compilers/GCC/ld/rules_data.ld
index 46c59a772..6d474eaf6 100644
--- a/os/common/startup/ARMCMx-SB/compilers/GCC/ld/rules_data.ld
+++ b/os/common/startup/ARMCMx-SB/compilers/GCC/ld/rules_data.ld
@@ -20,24 +20,24 @@ SECTIONS
     {
         PROVIDE(_textdata = LOADADDR(.data));
         PROVIDE(_data = .);
-        _textdata_start = LOADADDR(.data);
-        _data_start = .;
+       __textdata_base__ = LOADADDR(.data);
+       __data_base__ = .;
         *(.data)
         *(.data.*)
         *(.ramtext)
         . = ALIGN(4);
         PROVIDE(_edata = .);
-        _data_end = .;
+        __data_end__ = .;
     } > DATA_SPACE
 
     .bss (NOLOAD) : ALIGN(4)
     {
-        _bss_start = .;
+        __bss_base__ = .;
         *(.bss)
         *(.bss.*)
         *(COMMON)
         . = ALIGN(4);
-        _bss_end = .;
+        __bss_end__ = .;
         PROVIDE(end = .);
     } > DATA_SPACE
 }
diff --git a/os/common/startup/ARMCMx/compilers/GCC/ld/rules_code.ld b/os/common/startup/ARMCMx/compilers/GCC/ld/rules_code.ld
index b44bae05e..888cc712e 100644
--- a/os/common/startup/ARMCMx/compilers/GCC/ld/rules_code.ld
+++ b/os/common/startup/ARMCMx/compilers/GCC/ld/rules_code.ld
@@ -62,8 +62,10 @@ SECTIONS
 
     .ARM.exidx : {
         __exidx_base__ = .;
+        __exidx_start = .;
         *(.ARM.exidx* .gnu.linkonce.armexidx.*)
         __exidx_end__ = .;
+        __exidx_end = .;
      } > VARIOUS_FLASH AT > VARIOUS_FLASH_LMA
 
     .eh_frame_hdr :
diff --git a/readme.txt b/readme.txt
index 15b6bd608..8b3533adf 100644
--- a/readme.txt
+++ b/readme.txt
@@ -86,6 +86,8 @@
        MEMS Accelerometers.
 - NEW: Safer messages mechanism for sandboxes (to be backported to 20.3.1).
 - NEW: Added latency measurement test application.
+- FIX: Fixed missing symbols in GCC scatter files (bug #1091)
+       (backported to 20.3.1).
 - FIX: Fixed wrong SAI1 clock selection for STM32G4xx (bug #1090)
        (backported to 20.3.1).
 - FIX: Fixed STM32H7xx ADC problem in dual mode (bug #1089)