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1 | static inline void __attribute__ ((always_inline)) __lll_mutex_lock(int *futex) | |
2 | { | |
3 | int lws_errno = 14; | |
4 | int lws_ret = 0xdeadbeef; | |
5 | asm ( | |
6 | "0: \n\t" | |
7 | "copy %3, %%r26 \n\t" | |
8 | "copy %4, %%r25 \n\t" | |
9 | "copy %5, %%r24 \n\t" | |
10 | "ble " "0xb0" "(%%sr2, %%r0) \n\t" | |
11 | "ldi " "0" ", %%r20 \n\t" | |
12 | "cmpib,=,n " "11" ",%%r21,0b \n\t" | |
13 | "nop \n\t" | |
14 | "stw %%r28, %0 \n\t" | |
15 | "sub %%r0, %%r21, %%r21 \n\t" | |
16 | "stw %%r21, %1 \n\t" | |
17 | : "=m" (lws_ret), "=m"(lws_errno), "=m"(*futex) | |
18 | : "r"(futex), "r"(0), "r"(1) | |
19 | :"r1", "r26", "r25", "r24", "r23", "r22", "r21", "r20", "r28", "r31", "memory" | |
20 | ); | |
21 | } | |
22 | typedef struct { | |
23 | char *_IO_write_end; | |
24 | int lock; | |
25 | } _IO_FILE; | |
26 | __attribute__ ((__nothrow__)) __attribute__ ((noinline)) | |
27 | static int buffered_vfprintf(_IO_FILE *s) | |
28 | { | |
29 | char buf[8192]; | |
30 | _IO_FILE *hp; | |
31 | hp->_IO_write_end = buf; | |
32 | __lll_mutex_lock(&s->lock); | |
33 | } | |
34 | void foo(_IO_FILE *s) | |
35 | { | |
36 | buffered_vfprintf(s); | |
37 | } |