[core] Generate linker scripts based on flash layout

builder/family/beken-72xx.py

@@ -507,6 +507,8 @@ env.Replace(
     SIZECHECKCMD="$SIZETOOL -A -d $SOURCES",
     SIZEPRINTCMD="$SIZETOOL -B -d $SOURCES",
 )
+# Generate linker scripts with correct flash offsets
+env.GenerateLinkerScript(board, board.get("build.ldscript"))
 
 
 def to_offset(addr: int) -> int:

builder/family/realtek-ambz.py

@@ -259,6 +259,9 @@ env.Replace(
     SIZECHECKCMD="$SIZETOOL -A -d $SOURCES",
     SIZEPRINTCMD="$SIZETOOL -B -d $SOURCES",
 )
+# Generate linker scripts with correct flash offsets
+env.GenerateLinkerScript(board, board.get("build.ldscript"))
+env.GenerateLinkerScript(board, board.get("build.ldscript").replace("xip1", "xip2"))
 
 env.Append(
     BUILDERS=dict(

builder/frameworks/base.py

@@ -66,6 +66,7 @@ env.Append(
 found = False
 for f in family.inheritance:
     try:
+        env.Prepend(LIBPATH=[join("$CORES_DIR", f.name, "misc")])
         env.SConscript(f"../family/{f.name}.py", must_exist=True)
         found = True
     except UserError:
@@ -90,7 +91,6 @@ for f in family.inheritance:
         env.Prepend(CPPDEFINES=[(f"LT_{f.short_name}", "1")])
     if f.code:
         env.Prepend(CPPDEFINES=[(f"LT_{f.code.upper()}", "1")])
-    env.Prepend(LIBPATH=[join("$CORES_DIR", f.name, "misc")])
 
 # Sources - external libraries
 queue.AddExternalLibrary("ltchiptool")  # uf2ota source code

builder/utils/flash.py

@@ -1,11 +1,16 @@
 # Copyright (c) Kuba Szczodrzyński 2022-06-12.
 
+import re
+from os.path import isfile, join
+
+from ltchiptool.util.fileio import chext
+from platformio.platform.board import PlatformBoardConfig
 from SCons.Script import DefaultEnvironment, Environment
 
 env: Environment = DefaultEnvironment()
 
 
-def env_add_flash_layout(env: Environment, board):
+def env_add_flash_layout(env: Environment, board: PlatformBoardConfig):
     flash_layout: dict = board.get("flash")
     if flash_layout:
         defines = {}
@@ -33,4 +38,41 @@ def env_add_flash_layout(env: Environment, board):
         env.Replace(**defines)
 
 
+def env_generate_linker_script(env: Environment, board: PlatformBoardConfig, name: str):
+    template_name = chext(name, "template.ld")
+
+    # find the linker script template in LIBPATH
+    input = None
+    for path in env["LIBPATH"]:
+        path = env.subst(path)
+        if isfile(join(path, template_name)):
+            input = join(path, template_name)
+            break
+    if not input:
+        raise FileNotFoundError(template_name)
+
+    # load the .template.ld script
+    with open(input, "r") as f:
+        ldscript = f.read()
+
+    def transform(match: re.Match[str]):
+        key = match[1]
+        if key in env:
+            return env[key]
+        if key.startswith("BOARD_"):
+            key = key[6:].lower()
+            return board.get(key)
+        raise ValueError(f"Unrecognized template key: {key}")
+
+    ldscript = re.sub(r"\${([A-Z0-9_.]+)}", transform, ldscript)
+
+    # write .ld script
+    output = join("${BUILD_DIR}", name)
+    with open(env.subst(output), "w") as f:
+        f.write(ldscript)
+
+    env.Prepend(LIBPATH=["${BUILD_DIR}"])
+
+
 env.AddMethod(env_add_flash_layout, "AddFlashLayout")
+env.AddMethod(env_generate_linker_script, "GenerateLinkerScript")