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! sbrk() system call
 
#include "syscallasm.h"
 
        TEXT_SECTION
        ALIGN (4)
#ifdef REENT
        GLOBAL (ASM_SYMBOL (_sbrk_r))
ASM_SYMBOL (_sbrk_r):
        mov     %o0,%o5
        mov     %o1,%o0
#else
        GLOBAL (ASM_SYMBOL (sbrk))
ASM_SYMBOL (sbrk):
#endif
        add     %o0,7,%o0
        andn    %o0,7,%o0
        sethi   %hi (ASM_PRIVATE_SYMBOL (curbrk)),%o2
#ifdef __sparc_v9__
        lduw    [%o2+%lo (ASM_PRIVATE_SYMBOL (curbrk))],%o3
#else
        ld      [%o2+%lo (ASM_PRIVATE_SYMBOL (curbrk))],%o3
#endif
        add     %o3,7,%o3
        andn    %o3,7,%o3
        add     %o3,%o0,%o0
        mov     %o0,%o4
        mov     SYS_brk,%g1
        ta      SYSCALL_TRAP
        bcs     err
        nop
        st      %o4,[%o2+%lo (ASM_PRIVATE_SYMBOL (curbrk))]
        jmpl    %o7+8,%g0
        mov     %o3,%o0
 
#ifdef REENT
        GLOBAL (ASM_SYMBOL (_brk_r))
ASM_SYMBOL (_brk_r):
        mov     %o0,%o5
        mov     %o1,%o0
#else
        GLOBAL (ASM_SYMBOL (brk))
ASM_SYMBOL (brk):
#endif
        add     %o0,7,%o0
        andn    %o0,7,%o0
        mov     %o0,%o2
        mov     SYS_brk,%g1
        ta      SYSCALL_TRAP
        bcs     err
        nop
        sethi   %hi (ASM_PRIVATE_SYMBOL (curbrk)),%o3
        st      %o2,[%o3+%lo (ASM_PRIVATE_SYMBOL (curbrk))]
        retl
        mov     %g0,%o0
 
err:
#ifdef REENT
        sethi   %hi (ASM_PRIVATE_SYMBOL (cerror_r)),%g1
        or      %g1,%lo (ASM_PRIVATE_SYMBOL (cerror_r)),%g1
#else
        sethi   %hi (ASM_PRIVATE_SYMBOL (cerror)),%g1
        or      %g1,%lo (ASM_PRIVATE_SYMBOL (cerror)),%g1
#endif
        jmpl    %g1,%g0
        mov     %o5,%o1

Line No.	Rev	Author	Line
1	39	lampret	`! sbrk() system call`
2
3			`#include "syscallasm.h"`
4
5			`TEXT_SECTION`
6			`ALIGN (4)`
7			`#ifdef REENT`
8			`GLOBAL (ASM_SYMBOL (_sbrk_r))`
9			`ASM_SYMBOL (_sbrk_r):`
10			`mov %o0,%o5`
11			`mov %o1,%o0`
12			`#else`
13			`GLOBAL (ASM_SYMBOL (sbrk))`
14			`ASM_SYMBOL (sbrk):`
15			`#endif`
16			`add %o0,7,%o0`
17			`andn %o0,7,%o0`
18			`sethi %hi (ASM_PRIVATE_SYMBOL (curbrk)),%o2`
19			`#ifdef __sparc_v9__`
20			`lduw [%o2+%lo (ASM_PRIVATE_SYMBOL (curbrk))],%o3`
21			`#else`
22			`ld [%o2+%lo (ASM_PRIVATE_SYMBOL (curbrk))],%o3`
23			`#endif`
24			`add %o3,7,%o3`
25			`andn %o3,7,%o3`
26			`add %o3,%o0,%o0`
27			`mov %o0,%o4`
28			`mov SYS_brk,%g1`
29			`ta SYSCALL_TRAP`
30			`bcs err`
31			`nop`
32			`st %o4,[%o2+%lo (ASM_PRIVATE_SYMBOL (curbrk))]`
33			`jmpl %o7+8,%g0`
34			`mov %o3,%o0`
35
36			`#ifdef REENT`
37			`GLOBAL (ASM_SYMBOL (_brk_r))`
38			`ASM_SYMBOL (_brk_r):`
39			`mov %o0,%o5`
40			`mov %o1,%o0`
41			`#else`
42			`GLOBAL (ASM_SYMBOL (brk))`
43			`ASM_SYMBOL (brk):`
44			`#endif`
45			`add %o0,7,%o0`
46			`andn %o0,7,%o0`
47			`mov %o0,%o2`
48			`mov SYS_brk,%g1`
49			`ta SYSCALL_TRAP`
50			`bcs err`
51			`nop`
52			`sethi %hi (ASM_PRIVATE_SYMBOL (curbrk)),%o3`
53			`st %o2,[%o3+%lo (ASM_PRIVATE_SYMBOL (curbrk))]`
54			`retl`
55			`mov %g0,%o0`
56
57			`err:`
58			`#ifdef REENT`
59			`sethi %hi (ASM_PRIVATE_SYMBOL (cerror_r)),%g1`
60			`or %g1,%lo (ASM_PRIVATE_SYMBOL (cerror_r)),%g1`
61			`#else`
62			`sethi %hi (ASM_PRIVATE_SYMBOL (cerror)),%g1`
63			`or %g1,%lo (ASM_PRIVATE_SYMBOL (cerror)),%g1`
64			`#endif`
65			`jmpl %g1,%g0`
66			`mov %o5,%o1`

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[/] [or1k/] [branches/] [newlib/] [newlib/] [libgloss/] [sparc/] [libsys/] [sbrk.S] - Blame information for rev 39