OpenWrt – Blame information for rev 1

Subversion Repositories:
Rev:
Rev Author Line No. Line
1 office 1 #include <exports.h>
2  
3 #ifndef GCC_VERSION
4 #define GCC_VERSION (__GNUC__ * 1000 + __GNUC_MINOR__)
5 #endif /* GCC_VERSION */
6  
7 /*
8 * k0 ($26) holds the pointer to the global_data; t9 ($25) is a call-
9 * clobbered register that is also used to set gp ($26). Note that the
10 * jr instruction also executes the instruction immediately following
11 * it; however, GCC/mips generates an additional `nop' after each asm
12 * statement
13 */
14 #define EXPORT_FUNC(x) \
15 asm volatile ( \
16 " .globl " #x "\n" \
17 #x ":\n" \
18 " lw $25, %0($26)\n" \
19 " lw $25, %1($25)\n" \
20 " jr $25\n" \
21 : : "i"(offsetof(gd_t, jt)), "i"(XF_ ## x * sizeof(void *)) : "t9");
22  
23 /* This function is necessary to prevent the compiler from
24 * generating prologue/epilogue, preparing stack frame etc.
25 * The stub functions are special, they do not use the stack
26 * frame passed to them, but pass it intact to the actual
27 * implementation. On the other hand, asm() statements with
28 * arguments can be used only inside the functions (gcc limitation)
29 */
30 #if GCC_VERSION < 3004
31 static
32 #endif /* GCC_VERSION */
33 void __attribute__((unused)) dummy(void)
34 {
35 #include <_exports.h>
36 }
37  
38 #if 0
39 extern unsigned long __bss_start, _end;
40  
41 void app_startup(char **argv)
42 {
43 unsigned long * cp = &__bss_start;
44  
45 /* Zero out BSS */
46 while (cp < &_end) {
47 *cp++ = 0;
48 }
49 }
50 #endif
51  
52 #undef EXPORT_FUNC