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[/] [or1k_soc_on_altera_embedded_dev_kit/] [trunk/] [linux-2.6/] [linux-2.6.24/] [arch/] [sparc/] [kernel/] [sclow.S] - Blame information for rev 3

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/* sclow.S: Low level special syscall handling.
 *          Basically these are cases where we can completely
 *          handle the system call without saving any state
 *          because we know that the process will not sleep.
 *
 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
 */
 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
 
#define CC_AND_RETT  \
        set     PSR_C, %l4; \
        andn    %l0, %l4, %l4; \
        wr      %l4, 0x0, %psr; \
        nop; nop; nop; \
        jmp     %l2; \
        rett    %l2 + 4;
 
#define SC_AND_RETT  \
        set     PSR_C, %l4; \
        or      %l0, %l4, %l4; \
        wr      %l4, 0x0, %psr; \
        nop; nop; nop; \
        jmp     %l2; \
        rett    %l2 + 4;
 
#define LABEL(func)  func##_low
 
        .globl  LABEL(sunosnop)
LABEL(sunosnop):
        CC_AND_RETT
 
#if (ASIZ_task_uid == 2 && ASIZ_task_euid == 2)
        .globl  LABEL(sunosgetuid)
LABEL(sunosgetuid):
        LOAD_CURRENT(l4, l5)
        ld      [%l4 + TI_TASK], %l4
        lduh    [%l4 + AOFF_task_uid], %i0
        lduh    [%l4 + AOFF_task_euid], %i1
        CC_AND_RETT
#endif
 
#if (ASIZ_task_gid == 2 && ASIZ_task_egid == 2)
        .globl  LABEL(sunosgetgid)
LABEL(sunosgetgid):
        LOAD_CURRENT(l4, l5)
        ld      [%l4 + TI_TASK], %l4
        lduh    [%l4 + AOFF_task_gid], %i0
        lduh    [%l4 + AOFF_task_egid], %i1
        CC_AND_RETT
#endif
 
        .globl  LABEL(sunosmctl)
LABEL(sunosmctl):
        mov     0, %i0
        CC_AND_RETT
 
        .globl  LABEL(sunosgdtsize)
LABEL(sunosgdtsize):
        mov     256, %i0
        CC_AND_RETT
 
        .globl  LABEL(getpagesize)
LABEL(getpagesize):
        set     PAGE_SIZE, %i0
        CC_AND_RETT
 
        /* XXX sys_nice() XXX */
        /* XXX sys_setpriority() XXX */
        /* XXX sys_getpriority() XXX */
        /* XXX sys_setregid() XXX */
        /* XXX sys_setgid() XXX */
        /* XXX sys_setreuid() XXX */
        /* XXX sys_setuid() XXX */
        /* XXX sys_setfsuid() XXX */
        /* XXX sys_setfsgid() XXX */
        /* XXX sys_setpgid() XXX */
        /* XXX sys_getpgid() XXX */
        /* XXX sys_setsid() XXX */
        /* XXX sys_getsid() XXX */

Line No.	Rev	Author	Line
1	3	xianfeng	`/* sclow.S: Low level special syscall handling.`
2			`* Basically these are cases where we can completely`
3			`* handle the system call without saving any state`
4			`* because we know that the process will not sleep.`
5			`*`
6			`* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)`
7			`*/`
8
9			`#include`
10			`#include`
11			`#include`
12			`#include`
13			`#include`
14			`#include`
15			`#include`
16
17			`#define CC_AND_RETT \`
18			`set PSR_C, %l4; \`
19			`andn %l0, %l4, %l4; \`
20			`wr %l4, 0x0, %psr; \`
21			`nop; nop; nop; \`
22			`jmp %l2; \`
23			`rett %l2 + 4;`
24
25			`#define SC_AND_RETT \`
26			`set PSR_C, %l4; \`
27			`or %l0, %l4, %l4; \`
28			`wr %l4, 0x0, %psr; \`
29			`nop; nop; nop; \`
30			`jmp %l2; \`
31			`rett %l2 + 4;`
32
33			`#define LABEL(func) func##_low`
34
35			`.globl LABEL(sunosnop)`
36			`LABEL(sunosnop):`
37			`CC_AND_RETT`
38
39			`#if (ASIZ_task_uid == 2 && ASIZ_task_euid == 2)`
40			`.globl LABEL(sunosgetuid)`
41			`LABEL(sunosgetuid):`
42			`LOAD_CURRENT(l4, l5)`
43			`ld [%l4 + TI_TASK], %l4`
44			`lduh [%l4 + AOFF_task_uid], %i0`
45			`lduh [%l4 + AOFF_task_euid], %i1`
46			`CC_AND_RETT`
47			`#endif`
48
49			`#if (ASIZ_task_gid == 2 && ASIZ_task_egid == 2)`
50			`.globl LABEL(sunosgetgid)`
51			`LABEL(sunosgetgid):`
52			`LOAD_CURRENT(l4, l5)`
53			`ld [%l4 + TI_TASK], %l4`
54			`lduh [%l4 + AOFF_task_gid], %i0`
55			`lduh [%l4 + AOFF_task_egid], %i1`
56			`CC_AND_RETT`
57			`#endif`
58
59			`.globl LABEL(sunosmctl)`
60			`LABEL(sunosmctl):`
61			`mov 0, %i0`
62			`CC_AND_RETT`
63
64			`.globl LABEL(sunosgdtsize)`
65			`LABEL(sunosgdtsize):`
66			`mov 256, %i0`
67			`CC_AND_RETT`
68
69			`.globl LABEL(getpagesize)`
70			`LABEL(getpagesize):`
71			`set PAGE_SIZE, %i0`
72			`CC_AND_RETT`
73
74			`/* XXX sys_nice() XXX */`
75			`/* XXX sys_setpriority() XXX */`
76			`/* XXX sys_getpriority() XXX */`
77			`/* XXX sys_setregid() XXX */`
78			`/* XXX sys_setgid() XXX */`
79			`/* XXX sys_setreuid() XXX */`
80			`/* XXX sys_setuid() XXX */`
81			`/* XXX sys_setfsuid() XXX */`
82			`/* XXX sys_setfsgid() XXX */`
83			`/* XXX sys_setpgid() XXX */`
84			`/* XXX sys_getpgid() XXX */`
85			`/* XXX sys_setsid() XXX */`
86			`/* XXX sys_getsid() XXX */`

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[/] [or1k_soc_on_altera_embedded_dev_kit/] [trunk/] [linux-2.6/] [linux-2.6.24/] [arch/] [sparc/] [kernel/] [sclow.S] - Blame information for rev 3