OpenCores
URL https://opencores.org/ocsvn/or1k/or1k/trunk

Subversion Repositories or1k

[/] [or1k/] [trunk/] [newlib-1.10.0/] [newlib/] [libc/] [sys/] [sparc64/] [sbrk.S] - Blame information for rev 1765

Details | Compare with Previous | View Log

Line No. Rev Author Line
1 1010 ivang 
! sbrk() system call
2 
 
3 
#include "sys/syscallasm.h"
4 
 
5 
        DATA_SECTION
6 
        ALIGN (4)
7 
 
8 
! CURBRK contains the current top of allocated space.
9 
! END is a private symbol in svr4, but a public one in sunos4.
10 
! FIXME: CURBRK is 4 bytes for now.
11 
 
12 
 
13 
        GLOBAL (ASM_PRIVATE_SYMBOL (curbrk))
14 
ASM_PRIVATE_SYMBOL (curbrk):
15 
#ifdef __svr4__
16 
        WORD (ASM_PRIVATE_SYMBOL (end))
17 
#else
18 
        WORD (ASM_SYMBOL (end))
19 
#endif
20 
 
21 
        TEXT_SECTION
22 
        ALIGN (4)
23 
#ifdef REENT
24 
        GLOBAL (ASM_SYMBOL (_sbrk_r))
25 
ASM_SYMBOL (_sbrk_r):
26 
        mov     %o0,%o5
27 
        mov     %o1,%o0
28 
#else
29 
        GLOBAL (ASM_SYMBOL (sbrk))
30 
ASM_SYMBOL (sbrk):
31 
#endif
32 
        add     %o0,7,%o0
33 
        andn    %o0,7,%o0
34 
        sethi   %hi (ASM_PRIVATE_SYMBOL (curbrk)),%o2
35 
        lduw    [%o2+%lo (ASM_PRIVATE_SYMBOL (curbrk))],%o3
36 
        add     %o3,7,%o3
37 
        andn    %o3,7,%o3
38 
        add     %o3,%o0,%o0
39 
        mov     %o0,%o4
40 
        mov     SYS_brk,%g1
41 
        ta      SYSCALL_TRAP
42 
        bcs     err
43 
        nop
44 
        stw     %o4,[%o2+%lo (ASM_PRIVATE_SYMBOL (curbrk))]
45 
        jmpl    %o7+8,%g0
46 
        mov     %o3,%o0
47 
 
48 
#ifdef REENT
49 
        GLOBAL (ASM_SYMBOL (_brk_r))
50 
ASM_SYMBOL (_brk_r):
51 
        mov     %o0,%o5
52 
        mov     %o1,%o0
53 
#else
54 
        GLOBAL (ASM_SYMBOL (brk))
55 
ASM_SYMBOL (brk):
56 
#endif
57 
        add     %o0,7,%o0
58 
        andn    %o0,7,%o0
59 
        mov     %o0,%o2
60 
        mov     SYS_brk,%g1
61 
        ta      SYSCALL_TRAP
62 
        bcs     err
63 
        nop
64 
        sethi   %hi (ASM_PRIVATE_SYMBOL (curbrk)),%o3
65 
        st      %o2,[%o3+%lo (ASM_PRIVATE_SYMBOL (curbrk))]
66 
        retl
67 
        mov     %g0,%o0
68 
 
69 
err:
70 
#ifdef REENT
71 
        sethi   %hi (ASM_PRIVATE_SYMBOL (cerror_r)),%g1
72 
        or      %g1,%lo (ASM_PRIVATE_SYMBOL (cerror_r)),%g1
73 
#else
74 
        sethi   %hi (ASM_PRIVATE_SYMBOL (cerror)),%g1
75 
        or      %g1,%lo (ASM_PRIVATE_SYMBOL (cerror)),%g1
76 
#endif
77 
        jmpl    %g1,%g0
78 
        mov     %o5,%o1

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.