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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [libgloss/] [sparc/] [libsys/] [sbrk.S] - Blame information for rev 207

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Line No. Rev Author Line
1 207 jeremybenn
! sbrk() system call
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#include "syscallasm.h"
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        TEXT_SECTION
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        ALIGN (4)
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#ifdef REENT
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        GLOBAL (ASM_SYMBOL (_sbrk_r))
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ASM_SYMBOL (_sbrk_r):
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        mov     %o0,%o5
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        mov     %o1,%o0
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#else
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        GLOBAL (ASM_SYMBOL (sbrk))
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ASM_SYMBOL (sbrk):
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#endif
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        add     %o0,7,%o0
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        andn    %o0,7,%o0
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        sethi   %hi (ASM_PRIVATE_SYMBOL (curbrk)),%o2
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#ifdef __sparc_v9__
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        lduw    [%o2+%lo (ASM_PRIVATE_SYMBOL (curbrk))],%o3
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#else
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        ld      [%o2+%lo (ASM_PRIVATE_SYMBOL (curbrk))],%o3
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#endif
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        add     %o3,7,%o3
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        andn    %o3,7,%o3
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        add     %o3,%o0,%o0
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        mov     %o0,%o4
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        mov     SYS_brk,%g1
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        ta      SYSCALL_TRAP
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        bcs     err
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        nop
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        st      %o4,[%o2+%lo (ASM_PRIVATE_SYMBOL (curbrk))]
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        jmpl    %o7+8,%g0
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        mov     %o3,%o0
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#ifdef REENT
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        GLOBAL (ASM_SYMBOL (_brk_r))
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ASM_SYMBOL (_brk_r):
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        mov     %o0,%o5
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        mov     %o1,%o0
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#else
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        GLOBAL (ASM_SYMBOL (brk))
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ASM_SYMBOL (brk):
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#endif
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        add     %o0,7,%o0
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        andn    %o0,7,%o0
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        mov     %o0,%o2
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        mov     SYS_brk,%g1
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        ta      SYSCALL_TRAP
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        bcs     err
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        nop
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        sethi   %hi (ASM_PRIVATE_SYMBOL (curbrk)),%o3
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        st      %o2,[%o3+%lo (ASM_PRIVATE_SYMBOL (curbrk))]
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        retl
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        mov     %g0,%o0
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err:
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#ifdef REENT
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        sethi   %hi (ASM_PRIVATE_SYMBOL (cerror_r)),%g1
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        or      %g1,%lo (ASM_PRIVATE_SYMBOL (cerror_r)),%g1
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#else
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        sethi   %hi (ASM_PRIVATE_SYMBOL (cerror)),%g1
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        or      %g1,%lo (ASM_PRIVATE_SYMBOL (cerror)),%g1
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#endif
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        jmpl    %g1,%g0
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        mov     %o5,%o1

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