tramp.S
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/*
* Copyright (C) 2013, 2014 Ludwig Knüpfer <ludwig.knuepfer@fu-berlin.de>
* Copyright (C) 2014 Thomas Eichinger <thomas.eichinger1@gmail.com>
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
.text
#ifdef __MACH__
.globl __native_sig_leave_tramp
__native_sig_leave_tramp:
pushl __native_saved_eip
pushfl
pushal
pushl __native_isr_ctx
pushl __native_cur_ctx
call _swapcontext
addl $8, %esp
call _irq_enable
movl $0x0, __native_in_isr
popal
popfl
ret
.globl __native_sig_leave_handler
__native_sig_leave_handler:
pushl __native_saved_eip
movl $0x0, __native_in_isr
ret
#elif __arm__
.globl _native_sig_leave_tramp
_native_sig_leave_tramp:
/* save _native_saved_eip and registers */
stmdb sp!, {r0}
ldr r0, =_native_saved_eip
ldr r0, [r0]
stmdb sp!, {r0-r12}
stmdb sp!, {lr}
/* exchange r0 and _native_saved_eip */
ldr r0, [sp,#56]
ldr r1, [sp,#4 ]
str r0, [sp,#4 ]
str r1, [sp,#56]
/* call swapcontext ( _native_cur_ctx, _native_isr_ctx ) */
ldr r2, =_native_cur_ctx
ldr r0, [r2]
ldr r2, =_native_isr_ctx
ldr r1, [r2]
bl swapcontext
/* reeanble interrupts */
bl irq_enable
/* _native_in_isr = 0 */
eor r0, r0, r0
ldr r2, =_native_in_isr
str r0, [r2]
/* restore registers, jump to (saved) _native_saved_eip */
ldmia sp!, {lr}
ldmia sp!, {r0-r12}
ldmia sp!, {pc}
.globl _native_sig_leave_handler
_native_sig_leave_handler:
stmdb sp!, {r0}
ldr r0, =_native_saved_eip
ldr r0, [r0]
stmdb sp!, {r0-r12}
stmdb sp!, {lr}
/* exchange r0 and _native_saved_eip */
ldr r0, [sp,#56]
ldr r1, [sp,#4 ]
str r0, [sp,#4 ]
str r1, [sp,#56]
/* _native_in_isr = 0 */
eor r0, r0, r0
ldr r1, =_native_in_isr
str r0, [r1]
ldmia sp!, {lr}
ldmia sp!, {r0-r12}
ldmia sp!, {pc}
#else
.globl _native_sig_leave_tramp
_native_sig_leave_tramp:
pushl _native_saved_eip
pushfl
pushal
pushl _native_isr_ctx
pushl _native_cur_ctx
call swapcontext
addl $8, %esp
call irq_enable
movl $0x0, _native_in_isr
popal
popfl
ret
.globl _native_sig_leave_handler
_native_sig_leave_handler:
pushl _native_saved_eip
movl $0x0, _native_in_isr
ret
#endif