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arm: fix u-boot port syscall interface va_arg handling

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Commit c9cd02c broke the u-boot syscall API for va_args that spill over
to the stack, causing the disk support to stop working. This patch
resolves the problem, while keeping the new, cleaner transition_space
handling.
This commit is contained in:
Leif Lindholm 2013-11-16 12:15:53 +00:00
parent 31c0cd4362
commit 593865b907
2 changed files with 6 additions and 9 deletions
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4
ChangeLog
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@ -1,3 +1,7 @@
2013-11-16 Leif Lindholm <leif.lindholm@linaro.org>
* grub-core/kern/arm/uboot/startup.S: fix grub_uboot_syscall va_arg
handling
2013-11-16 Andrey Borzenkov <arvidjaar@gmail.com>
* configure.ac: Restore -nostdlib for libgcc symbols tests.

11
grub-core/kern/arm/uboot/startup.S
View file

@ -131,11 +131,6 @@ FUNCTION(grub_uboot_syscall)
str r8, transition_space
str lr, transition_space + 4
str r9, transition_space + 8
str sp, transition_space + 12
sub sp, sp, #0x20
lsr sp, sp, #3
lsl sp, sp, #3
ldr r8, gd_backup
ldr r9, gd_backup + 4
@ -147,7 +142,6 @@ FUNCTION(grub_uboot_syscall)
ldr r8, transition_space
ldr lr, transition_space + 4
ldr r9, transition_space + 8
ldr sp, transition_space + 12
bx lr
@ -166,8 +160,8 @@ entry_state_end:
.long 0 @ r6
.long 0 @ r7
gd_backup:
.long 0 @ r8 - U-Boot global data pointer
.long 0 @ r9
.long 0 @ r8 - U-Boot global data pointer up to 2013-09-21
.long 0 @ r9 - U-Boot global data pointer 2013-09-21 onwards
.long 0 @ r10
.long 0 @ r11
VARIABLE(grub_uboot_search_hint)@ U-Boot stack pointer -
@ -180,7 +174,6 @@ transition_space:
.long 0 @ r8
.long 0 @ lr
.long 0 @ r9
.long 0 @ sp
VARIABLE(grub_uboot_syscall_ptr)
.long 0 @