1/* $FreeBSD$ */ 2 3#include "linux32_assym.h" /* system definitions */ 4#include <machine/asmacros.h> /* miscellaneous asm macros */ 5 6#include <amd64/linux32/linux32_syscall.h> /* system call numbers */ 7 8.data 9 10 .globl linux_platform 11linux_platform: 12 .asciz "i686" 13 14.text 15.code32 16 17/* 18 * To avoid excess stack frame the signal trampoline code emulates 19 * the 'call' instruction. 20 */ 21ENTRY(linux32_sigcode) 22 movl %esp, %ebx /* preserve sigframe */ 23 call .getip0 24.getip0: 25 popl %eax 26 add $.startsigcode-.getip0, %eax /* ret address */ 27 push %eax 28 jmp *LINUX_SIGF_HANDLER(%ebx) 29.startsigcode: 30 popl %eax 31 movl $LINUX32_SYS_linux_sigreturn,%eax /* linux_sigreturn() */ 32 int $0x80 /* enter kernel with args */ 33.endsigcode: 340: jmp 0b 35 36ENTRY(linux32_rt_sigcode) 37 leal LINUX_RT_SIGF_UC(%esp),%ebx /* linux ucp */ 38 leal LINUX_RT_SIGF_SC(%ebx),%ecx /* linux sigcontext */ 39 movl %esp, %edi 40 call .getip1 41.getip1: 42 popl %eax 43 add $.startrtsigcode-.getip1, %eax /* ret address */ 44 push %eax 45 jmp *LINUX_RT_SIGF_HANDLER(%edi) 46.startrtsigcode: 47 movl $LINUX32_SYS_linux_rt_sigreturn,%eax /* linux_rt_sigreturn() */ 48 int $0x80 /* enter kernel with args */ 49.endrtsigcode: 500: jmp 0b 51 52ENTRY(linux32_vsyscall) 53.startvsyscall: 54 int $0x80 55 ret 56.endvsyscall: 57 58#if 0 59 .section .note.Linux, "a",@note 60 .long 2f - 1f /* namesz */ 61 .balign 4 62 .long 4f - 3f /* descsz */ 63 .long 0 641: 65 .asciz "Linux" 662: 67 .balign 4 683: 69 .long LINUX_VERSION_CODE 704: 71 .balign 4 72 .previous 73#endif 74 75#define do_cfa_expr(offset) \ 76 .byte 0x0f; /* DW_CFA_def_cfa_expression */ \ 77 .uleb128 11f-10f; /* length */ \ 7810: .byte 0x74; /* DW_OP_breg4 */ \ 79 .sleb128 offset; /* offset */ \ 80 .byte 0x06; /* DW_OP_deref */ \ 8111: 82 83 84 /* CIE */ 85 .section .eh_frame,"a",@progbits 86.LSTARTFRAMEDLSI1: 87 .long .LENDCIEDLSI1-.LSTARTCIEDLSI1 88.LSTARTCIEDLSI1: 89 .long 0 /* CIE ID */ 90 .byte 1 /* Version number */ 91 .string "zRS" /* NULL-terminated 92 * augmentation string 93 */ 94 .uleb128 1 /* Code alignment factor */ 95 .sleb128 -4 /* Data alignment factor */ 96 .byte 8 /* Return address 97 * register column 98 */ 99 .uleb128 1 /* Augmentation value length */ 100 .byte 0x1b /* DW_EH_PE_pcrel|DW_EH_PE_sdata4. */ 101 .byte 0 /* DW_CFA_nop */ 102 .align 4 103.LENDCIEDLSI1: 104 105 /* FDE */ 106 .long .LENDFDEDLSI1-.LSTARTFDEDLSI1 /* Length FDE */ 107.LSTARTFDEDLSI1: 108 .long .LSTARTFDEDLSI1-.LSTARTFRAMEDLSI1 /* CIE pointer */ 109 .long .startsigcode-. /* PC-relative start address */ 110 .long .endsigcode-.startsigcode 111 .uleb128 0 /* Augmentation */ 112 do_cfa_expr(LINUX_SIGF_SC-8) 113 .align 4 114.LENDFDEDLSI1: 115 116 .long .LENDFDEDLSI2-.LSTARTFDEDLSI2 /* Length FDE */ 117.LSTARTFDEDLSI2: 118 .long .LSTARTFDEDLSI2-.LSTARTFRAMEDLSI1 /* CIE pointer */ 119 .long .startrtsigcode-. /* PC-relative start address */ 120 .long .endrtsigcode-.startrtsigcode 121 .uleb128 0 /* Augmentation */ 122 do_cfa_expr(LINUX_RT_SIGF_SC-4+LINUX_SC_ESP) 123 .align 4 124.LENDFDEDLSI2: 125 .previous 126 127 .section .eh_frame,"a",@progbits 128.LSTARTFRAMEDLSI2: 129 .long .LENDCIEDLSI2-.LSTARTCIEDLSI2 130.LSTARTCIEDLSI2: 131 .long 0 /* CIE ID */ 132 .byte 1 /* Version number */ 133 .string "zR" /* NULL-terminated 134 * augmentation string 135 */ 136 .uleb128 1 /* Code alignment factor */ 137 .sleb128 -4 /* Data alignment factor */ 138 .byte 8 /* Return address register column */ 139 .uleb128 1 /* Augmentation value length */ 140 .byte 0x1b /* DW_EH_PE_pcrel|DW_EH_PE_sdata4. */ 141 .byte 0x0c /* DW_CFA_def_cfa */ 142 .uleb128 4 143 .uleb128 4 144 .byte 0x88 /* DW_CFA_offset, column 0x8 */ 145 .uleb128 1 146 .align 4 147.LENDCIEDLSI2: 148 .long .LENDFDEDLSI3-.LSTARTFDEDLSI3 /* Length FDE */ 149.LSTARTFDEDLSI3: 150 .long .LSTARTFDEDLSI3-.LSTARTFRAMEDLSI2 /* CIE pointer */ 151 .long .startvsyscall-. /* PC-relative start address */ 152 .long .endvsyscall-.startvsyscall 153 .uleb128 0 154 .align 4 155.LENDFDEDLSI3: 156 .previous 157