dm: x86: Support pre-reloc malloc()
Add support for this by reserving a block of memory below global_data.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/x86/cpu/start.S b/arch/x86/cpu/start.S
index 71cab22..338bab1 100644
--- a/arch/x86/cpu/start.S
+++ b/arch/x86/cpu/start.S
@@ -97,6 +97,13 @@
/* Reserve space for global descriptor table */
subl $X86_GDT_SIZE, %esp
+#if defined(CONFIG_SYS_MALLOC_F_LEN)
+ subl $CONFIG_SYS_MALLOC_F_LEN, %esp
+ movl %eax, %edx
+ addl $GD_MALLOC_BASE, %edx
+ movl %esp, (%edx)
+#endif
+
/* Align temporary global descriptor table to 16-byte boundary */
andl $0xfffffff0, %esp