Use of ld specic function (ADDR) break non-ld linkers

[tejlmand]

Describe the bug

Non-ld linkers was broken with PR##80768

zephyr_linker_symbol() is only intended with simple math operations, as described by the function:

zephyr/cmake/modules/extensions.cmake

Lines 5366 to 5370 in d6c59f0

	# EXPR <expr> : Expression that defines the symbol. Due to linker limitations
	# all expressions should only contain simple math, such as
	# `+, -, *` and similar. The expression will go directly into the
	# linker, and all `@<symbol>@` will be replaced with the referred
	# symbol.

The changes introduced in #80678 breaks this rule by introducing ADDR() which is a ld specific function not understood by non-ld linkers, such as armlink.

To Reproduce

1. Setup Arm Conpiler 6, as described: https://docs.zephyrproject.org/latest/develop/toolchains/arm_compiler.html
2. Build a simple sample, such as hello world:
   west build -p -b qemu_cortex_m3 samples/hello_world/ -- -DCONFIG_CMAKE_LINKER_GENERATOR=y -DCONFIG_ARMCLANG_STD_LIBC=y
3. See error:

   Error: L6630E: Invalid token start expected number or ( but found A at position 26 on line 498
   Error: L6226E: Missing base address for region __ramfunc_region_start.
   "/projects/github/ncs/zephyr/build/zephyr/linker_zephyr_pre0.cmd", line 498 (column 26): Error: L6292E: Ignoring unknown attribute 'ADDR' specified for region __ramfunc_region_start.
   Error: L6630E: Invalid token start expected number or ( but found . at position 31 on line 498
   Error: L6629E: Unmatched parentheses expecting ) but found . at position 31 on line 498
   "/projects/github/ncs/zephyr/build/zephyr/linker_zephyr_pre0.cmd", line 498 (column 31): Error: L6228E: Expected '{', found '....'.
   "/projects/github/ncs/zephyr/build/zephyr/linker_zephyr_pre0.cmd", line 498 (column 31): Error: L6228E: Expected '}', found 'EOF'.
   

Offending line:

zephyr/cmake/linker_script/arm/linker.cmake

Line 146 in d6c59f0

zephyr_linker_symbol(SYMBOL __ramfunc_region_start EXPR "ADDR(.ramfunc)")

Expected behavior
Successful linking:

[2/109] Generating include/generated/zephyr/version.h
-- Zephyr version: 4.0.0-rc2 (/projects/github/ncs/zephyr), build: v4.0.0-rc2-84-g6984237c0638
[109/109] Linking C executable zephyr/zephyr.elf
Generating files from /projects/github/ncs/zephyr/build/zephyr/zephyr.elf for board: qemu_cortex_m3

Impact
Support for Arm Compiler 6 is broken.

Logs and console output
N/A

Environment (please complete the following information):

• OS: Linux
• Toolchain: Arm compiler 6
• Commit SHA or Version used: 6023d6a or never

Additional context
Offending line:

zephyr/cmake/linker_script/arm/linker.cmake

Line 146 in d6c59f0

zephyr_linker_symbol(SYMBOL __ramfunc_region_start EXPR "ADDR(.ramfunc)")

[tejlmand]

@LoveKarlsson FYI, might impact IAR as well.

[LoveKarlsson]

@LoveKarlsson FYI, might impact IAR as well.

We have added support for ADDR and LOADADDR to our linker