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avr32: fix sys_sync_file_range() call convention 

On AVR32, all parameters beyond the 5th are passed on the stack. System
calls don't use the stack -- they borrow a callee-saved register
instead. This means that syscalls that take 6 parameters must be called
through a stub that pushes the last parameter on the stack.

This patch adds a stub for sync_file_range syscall on AVR32
architecture.  Tested with uClibc snapshot.

Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
This commit is contained in:
Hans-Christian Egtvedt 2008-09-17 13:39:45 +02:00 committed by Haavard Skinnemoen
parent e37925ebdb
commit 73d4393d1d
2 changed files with 10 additions and 1 deletions
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9
arch/avr32/kernel/syscall-stubs.S
View File

@ -109,3 +109,12 @@ __sys_epoll_pwait:
rcall sys_epoll_pwait
sub sp, -4
popm pc
.global __sys_sync_file_range
.type __sys_sync_file_range,@function
__sys_sync_file_range:
pushm lr
st.w --sp, ARG6
rcall sys_sync_file_range
sub sp, -4
popm pc

2
arch/avr32/kernel/syscall_table.S
View File

@ -275,7 +275,7 @@ sys_call_table:
.long sys_set_robust_list
.long sys_get_robust_list /* 260 */
.long __sys_splice
.long sys_sync_file_range
.long __sys_sync_file_range
.long sys_tee
.long sys_vmsplice
.long __sys_epoll_pwait /* 265 */