system_call.S

/*
 * Code for the vDSO.  This version uses the old int $0x80 method.
 *
 * First get the common code for the sigreturn entry points.
 * This must come first.
 */
#include "sigreturn.S"

	.text
	.globl __kernel_vsyscall
	.type __kernel_vsyscall,@function
	ALIGN
__kernel_vsyscall:
.LSTART_vsyscall:
	int $0x80
	ret
.LEND_vsyscall:
	.size __kernel_vsyscall,.-.LSTART_vsyscall
	.previous

	.section .eh_frame,"a",@progbits
.LSTARTFRAMEDLSI:
	.long .LENDCIEDLSI-.LSTARTCIEDLSI
.LSTARTCIEDLSI:
	.long 0			/* CIE ID */
	.byte 1			/* Version number */
	.string "zR"		/* NUL-terminated augmentation string */
	.uleb128 1		/* Code alignment factor */
	.sleb128 -4		/* Data alignment factor */
	.byte 8			/* Return address register column */
	.uleb128 1		/* Augmentation value length */
	.byte 0x1b		/* DW_EH_PE_pcrel|DW_EH_PE_sdata4. */
	.byte 0x0c		/* DW_CFA_def_cfa */
	.uleb128 4
	.uleb128 4
	.byte 0x88		/* DW_CFA_offset, column 0x8 */
	.uleb128 1
	.align 4
.LENDCIEDLSI:
	.long .LENDFDEDLSI-.LSTARTFDEDLSI /* Length FDE */
.LSTARTFDEDLSI:
	.long .LSTARTFDEDLSI-.LSTARTFRAMEDLSI /* CIE pointer */
	.long .LSTART_vsyscall-.	/* PC-relative start address */
	.long .LEND_vsyscall-.LSTART_vsyscall
	.uleb128 0
	.align 4
.LENDFDEDLSI:
	.previous

	/*
	 * Pad out the segment to match the size of the sysenter.S version.
	 */
VDSO32_vsyscall_eh_frame_size = 0x40
	.section .data,"aw",@progbits
	.space VDSO32_vsyscall_eh_frame_size-(.LENDFDEDLSI-.LSTARTFRAMEDLSI), 0
	.previous