[PATCH 04/19] spl: Provide a way to mark code needed for relocation

Simon Glass
2024-09-25T12:58:26Z

Add a linker symbol which can be used to mark relocation code, so it can
be collected by the linker and copied into a suitable place and executed
when needed.

Signed-off-by: Simon Glass <sjg@chromium.org>
---

include/asm-generic/sections.h | 16 ++++++++++++++++
1 file changed, 16 insertions(+)

diff --git a/include/asm-generic/sections.h b/include/asm-generic/sections.h
index b6bca53db10..3fd5c772a1a 100644
--- a/include/asm-generic/sections.h
+++ b/include/asm-generic/sections.h
@@ -67,6 +67,9 @@ extern char __text_start[];
/* This marks the text region which must be relocated */
extern char __image_copy_start[], __image_copy_end[];

+/* This marks the rcode region used for SPL relocation */
+extern char _rcode_start[], _rcode_end[];
+
extern char __bss_end[];
extern char __rel_dyn_start[], __rel_dyn_end[];
extern char _image_binary_end[];
@@ -77,4 +80,17 @@ extern char _image_binary_end[];
*/
extern void _start(void);

+#ifndef USE_HOSTCC
+#if CONFIG_IS_ENABLED(RELOC_LOADER)
+#define __rcode __section(".text.rcode")
+#define __rdata __section(".text.rdata")
+#else
+#define __rcode
+#define __rdata
+#endif
+#else
+#define __rcode
+#define __rdata
+#endif
+
#endif /* _ASM_GENERIC_SECTIONS_H_ */
--
2.43.0