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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [arch/] [x86_64/] [lib/] [thunk.S] - Blame information for rev 1275

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        /*
         * Save registers before calling assembly functions. This avoids
         * disturbance of register allocation in some inline assembly constructs.
         * Copyright 2001,2002 by Andi Kleen, SuSE Labs.
         * Subject to the GNU public license, v.2. No warranty of any kind.
         * $Id: thunk.S,v 1.1.1.1 2004-04-15 01:36:27 phoenix Exp $
         */
 
        #include 
        #include 
        #include 
        #include 
 
        /* rdi: arg1 ... normal C conventions. rax is saved/restored. */
        .macro thunk name,func
        .globl \name
\name:
        SAVE_ARGS
        call \func
        jmp  restore
        .endm
 
        /* rdi: arg1 ... normal C conventions. rax is passed from C. */
        .macro thunk_retrax name,func
        .globl \name
\name:
        SAVE_ARGS
        call \func
        jmp  restore_norax
        .endm
 
 
#ifdef CONFIG_RWSEM_XCHGADD_ALGORITHM
        thunk rwsem_down_read_failed_thunk,rwsem_down_read_failed
        thunk rwsem_down_write_failed_thunk,rwsem_down_write_failed
        thunk rwsem_wake_thunk,rwsem_wake
#endif
        thunk do_softirq_thunk,do_softirq
 
        thunk __down_failed,__down
        thunk_retrax __down_failed_interruptible,__down_interruptible
        thunk_retrax __down_failed_trylock,__down_trylock
        thunk __up_wakeup,__up
 
restore:
        RESTORE_ARGS
        ret
 
restore_norax:
        RESTORE_ARGS 1
        ret
 
#ifdef CONFIG_SMP
/* Support for read/write spinlocks. */
 
/* rax: pointer to rwlock_t */
ENTRY(__write_lock_failed)
        lock
        addl $RW_LOCK_BIAS,(%rax)
1:      rep
        nop
        cmpl $RW_LOCK_BIAS,(%rax)
        jne 1b
        lock
        subl $RW_LOCK_BIAS,(%rax)
        jnz  __write_lock_failed
        ret
 
/* rax: pointer to rwlock_t */
ENTRY(__read_lock_failed)
        lock
        incl (%rax)
1:      rep
        nop
        cmpl $1,(%rax)
        js 1b
        lock
        decl (%rax)
        js __read_lock_failed
        ret
#endif

Line No.	Rev	Author	Line
1	1275	phoenix	`/*`
2			`* Save registers before calling assembly functions. This avoids`
3			`* disturbance of register allocation in some inline assembly constructs.`
4			`* Copyright 2001,2002 by Andi Kleen, SuSE Labs.`
5			`* Subject to the GNU public license, v.2. No warranty of any kind.`
6			`* $Id: thunk.S,v 1.1.1.1 2004-04-15 01:36:27 phoenix Exp $`
7			`*/`
8
9			`#include`
10			`#include`
11			`#include`
12			`#include`
13
14			`/* rdi: arg1 ... normal C conventions. rax is saved/restored. */`
15			`.macro thunk name,func`
16			`.globl \name`
17			`\name:`
18			`SAVE_ARGS`
19			`call \func`
20			`jmp restore`
21			`.endm`
22
23			`/* rdi: arg1 ... normal C conventions. rax is passed from C. */`
24			`.macro thunk_retrax name,func`
25			`.globl \name`
26			`\name:`
27			`SAVE_ARGS`
28			`call \func`
29			`jmp restore_norax`
30			`.endm`
31
32
33			`#ifdef CONFIG_RWSEM_XCHGADD_ALGORITHM`
34			`thunk rwsem_down_read_failed_thunk,rwsem_down_read_failed`
35			`thunk rwsem_down_write_failed_thunk,rwsem_down_write_failed`
36			`thunk rwsem_wake_thunk,rwsem_wake`
37			`#endif`
38			`thunk do_softirq_thunk,do_softirq`
39
40			`thunk __down_failed,__down`
41			`thunk_retrax __down_failed_interruptible,__down_interruptible`
42			`thunk_retrax __down_failed_trylock,__down_trylock`
43			`thunk __up_wakeup,__up`
44
45			`restore:`
46			`RESTORE_ARGS`
47			`ret`
48
49			`restore_norax:`
50			`RESTORE_ARGS 1`
51			`ret`
52
53			`#ifdef CONFIG_SMP`
54			`/* Support for read/write spinlocks. */`
55
56			`/* rax: pointer to rwlock_t */`
57			`ENTRY(__write_lock_failed)`
58			`lock`
59			`addl $RW_LOCK_BIAS,(%rax)`
60			`1: rep`
61			`nop`
62			`cmpl $RW_LOCK_BIAS,(%rax)`
63			`jne 1b`
64			`lock`
65			`subl $RW_LOCK_BIAS,(%rax)`
66			`jnz __write_lock_failed`
67			`ret`
68
69			`/* rax: pointer to rwlock_t */`
70			`ENTRY(__read_lock_failed)`
71			`lock`
72			`incl (%rax)`
73			`1: rep`
74			`nop`
75			`cmpl $1,(%rax)`
76			`js 1b`
77			`lock`
78			`decl (%rax)`
79			`js __read_lock_failed`
80			`ret`
81			`#endif`

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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [arch/] [x86_64/] [lib/] [thunk.S] - Blame information for rev 1275