1/* $FreeBSD$ */ 2 3#include "linux_assym.h" /* system definitions */ 4#include <machine/asmacros.h> /* miscellaneous asm macros */ 5 6#include <amd64/linux/linux_syscall.h> /* system call numbers */ 7 8 .data 9 10 .globl linux_platform 11linux_platform: 12 .asciz "x86_64" 13 14 15 .text 16/* 17 * To avoid excess stack frame the signal trampoline code emulates 18 * the 'call' instruction. 19 */ 20ENTRY(linux_rt_sigcode) 21 movq %rsp, %rbx /* preserve sigframe */ 22 call .getip 23.getip: 24 popq %rax 25 add $.startrtsigcode-.getip, %rax /* ret address */ 26 pushq %rax 27 jmp *LINUX_RT_SIGF_HANDLER(%rbx) 28.startrtsigcode: 29 movq $LINUX_SYS_linux_rt_sigreturn,%rax /* linux_rt_sigreturn() */ 30 syscall /* enter kernel with args */ 31 hlt 32.endrtsigcode: 330: jmp 0b 34 35 36#if 0 37 .section .note.Linux, "a",@note 38 .long 2f - 1f /* namesz */ 39 .balign 4 40 .long 4f - 3f /* descsz */ 41 .long 0 421: 43 .asciz "Linux" 442: 45 .balign 4 463: 47 .long LINUX_VERSION_CODE 484: 49 .balign 4 50 .previous 51#endif 52 53 .section .eh_frame,"a",@progbits 54.LSTARTFRAMEDLSI0: 55 .long .LENDCIEDLSI0-.LSTARTCIEDLSI0 56.LSTARTCIEDLSI0: 57 .long 0 /* CIE ID */ 58 .byte 1 /* Version number */ 59 .string "zR" /* NULL-terminated 60 * augmentation string 61 */ 62 .uleb128 1 /* Code alignment factor */ 63 .sleb128 -4 /* Data alignment factor */ 64 .byte 8 /* Return address register column */ 65 .uleb128 1 /* Augmentation value length */ 66 .byte 0x1b /* DW_EH_PE_pcrel|DW_EH_PE_sdata4. */ 67 .byte 0x0c /* DW_CFA_def_cfa */ 68 .uleb128 4 69 .uleb128 4 70 .byte 0x88 /* DW_CFA_offset, column 0x8 */ 71 .uleb128 1 72 .align 4 73.LENDCIEDLSI0: 74 .long .LENDFDEDLSI0-.LSTARTFDEDLSI0 /* Length FDE */ 75.LSTARTFDEDLSI0: 76 .long .LSTARTFDEDLSI0-.LSTARTFRAMEDLSI0 /* CIE pointer */ 77 .long .startrtsigcode-. /* PC-relative start address */ 78 .long .endrtsigcode-.startrtsigcode 79 .uleb128 0 80 .align 4 81.LENDFDEDLSI0: 82 .previous 83