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I viewed the source code of __libc_init_array . But I don't quite understand what this function does. I know that these symbols /* These magic symbols are provided by the linker. */ extern void (*__preinit_array_start []) (void) __attribute__((weak)); extern void (*__preinit_array_end []) (void) __attribute__((weak)); extern void (*__init_array_start []) (void) __attribute__((weak)); extern void (*__init_array_end []) (void) __attribute__((weak)); extern void (*__fini_array_start []) (void) __attribute__((weak)); extern void (*__fini_array_end []) (void) __attribute__((weak)); is defined in the linker script. Part of the linker script may look like: .preinit_array : { PROVIDE_HIDDEN (__preinit_array_start = .); KEEP (*(.preinit_array*)) PROVIDE_HIDDEN (__preinit_array_end = .); } >FLASH .init_array : { PROVIDE_HIDDEN (__init_array_start = .); KEEP (*(SORT(.init_array.*))) KEEP (*(.init_array*)) PROVIDE_HIDDEN (__init_array_end = .); } >FLASH ... And then I searched with the key "init_array" in the documentation of ELF-v1.1, GCC 4.7.2, ld, and CodeSourcery (I'm using CodeSourcery G++ Lite) only to get nothing. Where can I find the specification of these symbols?

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