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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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6
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7 #include <sys/syscall.h>
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8 #include <machine/asm.h>
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9
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10 /*
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11 * rfork_thread(3) - rfork_thread(flags, stack, func, arg);
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12 */
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13
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14 #define KERNCALL int $0x80
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15
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16 ENTRY(rfork_thread)
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17 push %ebp
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18 mov %esp, %ebp
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19 push %esi
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20
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32
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21 mov 12(%ebp), %esi # the thread stack address
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0
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22
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23 sub $4, %esi
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24 mov 20(%ebp), %eax # the thread argument
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25 mov %eax, (%esi)
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26
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27 sub $4, %esi
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32
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28 mov 16(%ebp), %eax # the thread start address
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0
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29 mov %eax, (%esi)
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30
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31 push 8(%ebp) # rfork(2) flags
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32 push $0
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33 mov $SYS_rfork, %eax
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34 KERNCALL
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35 jc error
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36
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37 cmp $0, %edx
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38 jne child
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39
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40 parent:
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41 add $8, %esp
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42 pop %esi
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32
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43 leave
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0
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44 ret
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45
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46 child:
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47 mov %esi, %esp
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48 pop %eax
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49 call *%eax # call a thread start address ...
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50 add $4, %esp
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51
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52 push %eax
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53 push $0
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54 mov $SYS_exit, %eax # ... and exit(2) after a thread would return
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55 KERNCALL
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56
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57 error:
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58 add $8, %esp
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59 pop %esi
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32
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60 leave
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0
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61 PIC_PROLOGUE
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62
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63 /* libc's cerror: jmp PIC_PLT(HIDENAME(cerror)) */
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64
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65 push %eax
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66 call PIC_PLT(CNAME(__error))
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67 pop %ecx
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68 PIC_EPILOGUE
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69 mov %ecx, (%eax)
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70 mov $-1, %eax
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71 mov $-1, %edx
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72 ret
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