OpenWrt – Blame information for rev 1
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1 | office | 1 | #include <exports.h> |
2 | |||
3 | #ifndef GCC_VERSION |
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4 | #define GCC_VERSION (__GNUC__ * 1000 + __GNUC_MINOR__) |
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5 | #endif /* GCC_VERSION */ |
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6 | |||
7 | /* |
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8 | * k0 ($26) holds the pointer to the global_data; t9 ($25) is a call- |
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9 | * clobbered register that is also used to set gp ($26). Note that the |
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10 | * jr instruction also executes the instruction immediately following |
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11 | * it; however, GCC/mips generates an additional `nop' after each asm |
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12 | * statement |
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13 | */ |
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14 | #define EXPORT_FUNC(x) \ |
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15 | asm volatile ( \ |
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16 | " .globl " #x "\n" \ |
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17 | #x ":\n" \ |
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18 | " lw $25, %0($26)\n" \ |
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19 | " lw $25, %1($25)\n" \ |
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20 | " jr $25\n" \ |
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21 | : : "i"(offsetof(gd_t, jt)), "i"(XF_ ## x * sizeof(void *)) : "t9"); |
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22 | |||
23 | /* This function is necessary to prevent the compiler from |
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24 | * generating prologue/epilogue, preparing stack frame etc. |
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25 | * The stub functions are special, they do not use the stack |
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26 | * frame passed to them, but pass it intact to the actual |
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27 | * implementation. On the other hand, asm() statements with |
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28 | * arguments can be used only inside the functions (gcc limitation) |
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29 | */ |
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30 | #if GCC_VERSION < 3004 |
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31 | static |
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32 | #endif /* GCC_VERSION */ |
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33 | void __attribute__((unused)) dummy(void) |
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34 | { |
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35 | #include <_exports.h> |
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36 | } |
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37 | |||
38 | #if 0 |
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39 | extern unsigned long __bss_start, _end; |
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40 | |||
41 | void app_startup(char **argv) |
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42 | { |
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43 | unsigned long * cp = &__bss_start; |
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44 | |||
45 | /* Zero out BSS */ |
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46 | while (cp < &_end) { |
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47 | *cp++ = 0; |
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48 | } |
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49 | } |
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50 | #endif |
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51 | |||
52 | #undef EXPORT_FUNC |