diff options
| author | Marc Jones <marcj303@gmail.com> | 2011-10-06 16:38:35 -0600 |
|---|---|---|
| committer | Marc Jones <marcj303@gmail.com> | 2011-10-11 11:47:06 +0200 |
| commit | 5f145faff88ac6a0951277142e8b4f8116ae79de (patch) | |
| tree | 4af0f5b5d29daa622802f6ca0ca08134585308f4 | |
| parent | 07bf9119310ceece5a6c76907004bc96af1a38cc (diff) | |
Don't do a call as the first instruction in libpayload.
Doing a call before the payload has set up its stack is risky. The stack may
not be in a favorable location. Normally this is not an issue with coreboot
or other well behaved callers.
Change-Id: Ie6f6748a471324b29ebad045c807dfc9f4b92034
Signed-off-by: Marc Jones <marcj303@gmail.com>
Reviewed-on: http://review.coreboot.org/240
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
| -rw-r--r-- | payloads/libpayload/arch/i386/head.S | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/payloads/libpayload/arch/i386/head.S b/payloads/libpayload/arch/i386/head.S index 88db4124d5..3dd61336f9 100644 --- a/payloads/libpayload/arch/i386/head.S +++ b/payloads/libpayload/arch/i386/head.S @@ -38,10 +38,7 @@ * change anything. */ _entry: - call _init - - /* We're back - go back to the bootloader. */ - ret + jmp _init .align 4 @@ -66,6 +63,9 @@ _init: /* No interrupts, please. */ cli + /* There is a bunch of stuff missing here to take arguments on the stack + * See http://www.coreboot.org/Payload_API and exec.S. + */ /* Store current stack pointer. */ movl %esp, %esi |