[coreboot-gerrit] Change in coreboot[master]: arch/x86/boot.c: Pass arguments when running programs

[Arthur Heymans (Code Review)]

Arthur Heymans has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/36143 )

Change subject: arch/x86/boot.c: Pass arguments when running programs
......................................................................

arch/x86/boot.c: Pass arguments when running programs

Payloads can use coreboot tables passed on the stack.
Stages could make use of an argument passed on the stack.

The assumption is made that stages and payloads start in assembly
where stack alignment does not matter.

Change-Id: Ie0f44e9e1992221e02c49d0492cdd2a3d9013560
Signed-off-by: Arthur Heymans 
---
M src/arch/x86/boot.c
1 file changed, 3 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/43/36143/1

diff --git a/src/arch/x86/boot.c b/src/arch/x86/boot.c
index 5f60f13..4cdced3 100644
--- a/src/arch/x86/boot.c
+++ b/src/arch/x86/boot.c
@@ -32,11 +32,13 @@
 {
    __asm__ volatile (
 #ifdef __x86_64__
+		"push %%rax\n"
    	"jmp  *%%rdi\n"
 #else
+		"push %%eax\n"
    	"jmp  *%%edi\n"
 #endif

-		:: "D"(prog_entry(prog))
+		:: "a" (prog_entry_arg(prog)), "D"(prog_entry(prog))
    );
 }