From: Alexey Brodkin <abrodkin@synopsys.com>
Date: Mon, 20 Jan 2014 10:30:39 +0000 (+0400)
Subject: board_r - fixup functions table after relocation
X-Git-Url: http://git.ipfire.org/?p=people%2Fms%2Fu-boot.git;a=commitdiff_plain;h=7395398ad273f11569f4c4f3fb45219b916480eb

board_r - fixup functions table after relocation

This is only required for "PIC" relocation and doesn't apply to modern
"PIE" relocation which does data relocation as well as code.

"init_sequence_r" is just an array that consists of compile-time
adresses of init functions. Since this is basically an array of integers
(pointers to "void" to be more precise) it won't be modified during
relocation - it will be just copied to new location as it is.

As a consequence on execution after relocation "initcall_run_list" will
be jumping to pre-relocation addresses. As long as we don't overwrite
pre-relocation memory area init calls are executed correctly. But still
it is dangerous because after relocation we don't expect initially used
memory to stay untouched.

Cc: Tom Rini <trini@ti.com>
Cc: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Doug Anderson <dianders@chromium.org>
Cc: Thomas Langer <thomas.langer@lantiq.com>
Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>
Acked-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
---

diff --git a/common/board_r.c b/common/board_r.c
index 86ca1cbbd4..c2d0763b57 100644
--- a/common/board_r.c
+++ b/common/board_r.c
@@ -903,9 +903,19 @@ init_fnc_t init_sequence_r[] = {
 
 void board_init_r(gd_t *new_gd, ulong dest_addr)
 {
+#ifdef CONFIG_NEEDS_MANUAL_RELOC
+	int i;
+#endif
+
 #ifndef CONFIG_X86
 	gd = new_gd;
 #endif
+
+#ifdef CONFIG_NEEDS_MANUAL_RELOC
+	for (i = 0; i < ARRAY_SIZE(init_sequence_r); i++)
+		init_sequence_r[i] += gd->reloc_off;
+#endif
+
 	if (initcall_run_list(init_sequence_r))
 		hang();