linux_locore.asm

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    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         .data
    9 
   10         .globl linux_platform
   11 linux_platform:
   12         .asciz "i686"
   13 
   14         .text
   15 
   16 ENTRY(linux_vdso_sigcode)
   17         .cfi_startproc
   18         .cfi_signal_frame
   19         .cfi_def_cfa    %esp, LINUX_SIGF_SC
   20         .cfi_offset     %gs, L_SC_GS
   21         .cfi_offset     %fs, L_SC_FS
   22         .cfi_offset     %es, L_SC_ES
   23         .cfi_offset     %ds, L_SC_DS
   24         .cfi_offset     %cs, L_SC_CS
   25         .cfi_offset     %ss, L_SC_SS
   26         .cfi_offset     %flags, L_SC_EFLAGS
   27         .cfi_offset     %edi, L_SC_EDI
   28         .cfi_offset     %esi, L_SC_ESI
   29         .cfi_offset     %ebp, L_SC_EBP
   30         .cfi_offset     %ebx, L_SC_EBX
   31         .cfi_offset     %edx, L_SC_EDX
   32         .cfi_offset     %ecx, L_SC_ECX
   33         .cfi_offset     %eax, L_SC_EAX
   34         .cfi_offset     %eip, L_SC_EIP
   35         .cfi_offset     %esp, L_SC_ESP
   36 
   37         movl    %esp, %ebx                      /* sigframe for sigreturn */
   38         call    *%edi                           /* call signal handler */
   39         popl    %eax                            /* gcc unwind code need this */
   40         .cfi_def_cfa    %esp, LINUX_SIGF_SC-4
   41         movl    $LINUX_SYS_linux_sigreturn, %eax
   42         int     $0x80
   43 0:      jmp     0b
   44         .cfi_endproc
   45 END(linux_vdso_sigcode)
   46 
   47 ENTRY(linux_vdso_rt_sigcode)
   48         .cfi_startproc
   49         .cfi_signal_frame
   50         .cfi_def_cfa    %esp, LINUX_RT_SIGF_UC + LINUX_RT_SIGF_SC
   51         .cfi_offset     %gs, L_SC_GS
   52         .cfi_offset     %fs, L_SC_FS
   53         .cfi_offset     %es, L_SC_ES
   54         .cfi_offset     %ds, L_SC_DS
   55         .cfi_offset     %cs, L_SC_CS
   56         .cfi_offset     %ss, L_SC_SS
   57         .cfi_offset     %flags, L_SC_EFLAGS
   58         .cfi_offset     %edi, L_SC_EDI
   59         .cfi_offset     %esi, L_SC_ESI
   60         .cfi_offset     %ebp, L_SC_EBP
   61         .cfi_offset     %ebx, L_SC_EBX
   62         .cfi_offset     %edx, L_SC_EDX
   63         .cfi_offset     %ecx, L_SC_ECX
   64         .cfi_offset     %eax, L_SC_EAX
   65         .cfi_offset     %eip, L_SC_EIP
   66         .cfi_offset     %esp, L_SC_ESP
   67 
   68         leal    LINUX_RT_SIGF_UC(%esp), %ebx    /* linux ucontext for rt_sigreturn */
   69         call    *%edi                           /* call signal handler */
   70         movl    $LINUX_SYS_linux_rt_sigreturn, %eax
   71         int     $0x80
   72 0:      jmp     0b
   73         .cfi_endproc
   74 END(linux_vdso_rt_sigcode)
   75 
   76 ENTRY(__kernel_sigreturn)
   77         .cfi_startproc
   78         .cfi_signal_frame
   79         popl    %eax                            /* gcc unwind code need this */
   80         movl    $LINUX_SYS_linux_sigreturn, %eax
   81         int     $0x80
   82 0:      jmp     0b
   83         .cfi_endproc
   84 END(__kernel_sigreturn)
   85 
   86 ENTRY(__kernel_rt_sigreturn)
   87         .cfi_startproc
   88         .cfi_signal_frame
   89         movl    $LINUX_SYS_linux_rt_sigreturn, %eax
   90         int     $0x80
   91 0:      jmp     0b
   92         .cfi_endproc
   93 END(__kernel_rt_sigreturn)
   94 
   95 ENTRY(__kernel_vsyscall)
   96         .cfi_startproc
   97         int $0x80
   98         ret
   99         .cfi_endproc
  100 END(__kernel_vsyscall)
  101 
  102 #if 0
  103         .section .note.Linux, "a",@note
  104         .long 2f - 1f           /* namesz */
  105         .balign 4
  106         .long 4f - 3f           /* descsz */
  107         .long 0
  108 1:
  109         .asciz "Linux"
  110 2:
  111         .balign 4
  112 3:
  113         .long LINUX_VERSION_CODE
  114 4:
  115         .balign 4
  116         .previous
  117 #endif

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FreeBSD/Linux Kernel Cross Reference sys/i386/linux/linux_locore.asm

FreeBSD/Linux Kernel Cross Reference
sys/i386/linux/linux_locore.asm