1/* $FreeBSD$ */ 2 3#include "linux_assym.h" /* system definitions */ 4#include <machine/asmacros.h> /* miscellaneous asm macros */ 5 6#include <i386/linux/linux_syscall.h> /* system call numbers */ 7 8#include "assym.inc" 9 10/* 11 * To avoid excess stack frame the signal trampoline code emulates 12 * the 'call' instruction. 13 */ 14NON_GPROF_ENTRY(linux_sigcode) 15 movl %esp, %ebx /* preserve sigframe */ 16 call .getip0 17.getip0: 18 popl %eax 19 add $.startsigcode-.getip0, %eax /* ret address */ 20 push %eax 21 jmp *LINUX_SIGF_HANDLER(%ebx) 22.startsigcode: 23 popl %eax /* gcc unwind code need this */ 24 movl $LINUX_SYS_linux_sigreturn,%eax /* linux_sigreturn() */ 25 int $0x80 /* enter kernel with args */ 26.endsigcode: 270: jmp 0b 28 29NON_GPROF_ENTRY(linux_rt_sigcode) 30 leal LINUX_RT_SIGF_UC(%esp),%ebx /* linux ucp */ 31 leal LINUX_RT_SIGF_SC(%ebx),%ecx /* linux sigcontext */ 32 movl %esp, %edi 33 call .getip1 34.getip1: 35 popl %eax 36 add $.startrtsigcode-.getip1, %eax /* ret address */ 37 push %eax 38 jmp *LINUX_RT_SIGF_HANDLER(%edi) 39.startrtsigcode: 40 movl $LINUX_SYS_linux_rt_sigreturn,%eax /* linux_rt_sigreturn() */ 41 int $0x80 /* enter kernel with args */ 42.endrtsigcode: 430: jmp 0b 44 45NON_GPROF_ENTRY(linux_vsyscall) 46.startvsyscall: 47 int $0x80 48 ret 49.endvsyscall: 50 51#if 0 52 .section .note.Linux, "a",@note 53 .long 2f - 1f /* namesz */ 54 .balign 4 55 .long 4f - 3f /* descsz */ 56 .long 0 571: 58 .asciz "Linux" 592: 60 .balign 4 613: 62 .long LINUX_VERSION_CODE 634: 64 .balign 4 65 .previous 66#endif 67 68#define do_cfa_expr(offset) \ 69 .byte 0x0f; /* DW_CFA_def_cfa_expression */ \ 70 .uleb128 11f-10f; /* length */ \ 7110: .byte 0x74; /* DW_OP_breg4 */ \ 72 .sleb128 offset; /* offset */ \ 73 .byte 0x06; /* DW_OP_deref */ \ 7411: 75 76 77 /* CIE */ 78 .section .eh_frame,"a",@progbits 79.LSTARTFRAMEDLSI1: 80 .long .LENDCIEDLSI1-.LSTARTCIEDLSI1 81.LSTARTCIEDLSI1: 82 .long 0 /* CIE ID */ 83 .byte 1 /* Version number */ 84 .string "zRS" /* NULL-terminated 85 * augmentation string 86 */ 87 .uleb128 1 /* Code alignment factor */ 88 .sleb128 -4 /* Data alignment factor */ 89 .byte 8 /* Return address 90 * register column 91 */ 92 .uleb128 1 /* Augmentation value length */ 93 .byte 0x1b /* DW_EH_PE_pcrel|DW_EH_PE_sdata4. */ 94 .byte 0 /* DW_CFA_nop */ 95 .align 4 96.LENDCIEDLSI1: 97 98 /* FDE */ 99 .long .LENDFDEDLSI1-.LSTARTFDEDLSI1 /* Length FDE */ 100.LSTARTFDEDLSI1: 101 .long .LSTARTFDEDLSI1-.LSTARTFRAMEDLSI1 /* CIE pointer */ 102 .long .startsigcode-. /* PC-relative start address */ 103 .long .endsigcode-.startsigcode 104 .uleb128 0 /* Augmentation */ 105 do_cfa_expr(LINUX_SIGF_SC-8) 106 .align 4 107.LENDFDEDLSI1: 108 109 .long .LENDFDEDLSI2-.LSTARTFDEDLSI2 /* Length FDE */ 110.LSTARTFDEDLSI2: 111 .long .LSTARTFDEDLSI2-.LSTARTFRAMEDLSI1 /* CIE pointer */ 112 .long .startrtsigcode-. /* PC-relative start address */ 113 .long .endrtsigcode-.startrtsigcode 114 .uleb128 0 /* Augmentation */ 115 do_cfa_expr(LINUX_RT_SIGF_SC-4+LINUX_SC_ESP) 116 .align 4 117.LENDFDEDLSI2: 118 .previous 119 120 .section .eh_frame,"a",@progbits 121.LSTARTFRAMEDLSI2: 122 .long .LENDCIEDLSI2-.LSTARTCIEDLSI2 123.LSTARTCIEDLSI2: 124 .long 0 /* CIE ID */ 125 .byte 1 /* Version number */ 126 .string "zR" /* NULL-terminated 127 * augmentation string 128 */ 129 .uleb128 1 /* Code alignment factor */ 130 .sleb128 -4 /* Data alignment factor */ 131 .byte 8 /* Return address register column */ 132 .uleb128 1 /* Augmentation value length */ 133 .byte 0x1b /* DW_EH_PE_pcrel|DW_EH_PE_sdata4. */ 134 .byte 0x0c /* DW_CFA_def_cfa */ 135 .uleb128 4 136 .uleb128 4 137 .byte 0x88 /* DW_CFA_offset, column 0x8 */ 138 .uleb128 1 139 .align 4 140.LENDCIEDLSI2: 141 .long .LENDFDEDLSI3-.LSTARTFDEDLSI3 /* Length FDE */ 142.LSTARTFDEDLSI3: 143 .long .LSTARTFDEDLSI3-.LSTARTFRAMEDLSI2 /* CIE pointer */ 144 .long .startvsyscall-. /* PC-relative start address */ 145 .long .endvsyscall-.startvsyscall 146 .uleb128 0 147 .align 4 148.LENDFDEDLSI3: 149 .previous 150