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/* When we enter this piece of code, the program stack looks like this:
argc argument counter (integer)
argv[0] program name (pointer)
argv[1...N] program args (pointers)
argv[argc-1] end of args (integer)
NULL
env[0...N] environment variables (pointers)
NULL
*/
#include <features.h>
#include <sys/regdef.h>
.text
.global __start
.type __start,%function
.type __uClibc_start_main,%function
.weak _init
.weak _fini
.type __uClibc_start_main,%function
/* Stick in a dummy reference to main(), so that if an application
* is linking when the main() function is in a static library (.a)
* we can be sure that main() actually gets linked in */
.type main,%function
__start:
#ifdef __PIC__
.set noreorder
bltzal zero,0f
nop
0: .cpload $31
.set reorder
#endif
move $31, zero /* no return, but since the jal kills $31, skip this */
lw a0, 0($29) /* argc */
addu a1, $29, 4 /* get to start of argv */
addu a2, a0, 1 /* argv[0] program name (ordinal->cardinal) */
sll a2, a2, 2 /* multiple by 4 */
add a2, a2, a1 /* a2 now points to start of envp */
la a3, _init /* a3 is address of _init */
addiu sp, sp, -24 /* 16 + 4 rounded up to multiple of 8 */
/* multiple of 8 for longlong/double support */
la v0, _fini
sw v0, 16(sp) /* stack has 5th argument, address of _fini */
/* Ok, now run uClibc's main() -- shouldn't return */
jal __uClibc_start_main
addiu sp, sp, 24 /* undo stack argument */
/* Crash if somehow `exit' returns anyways. */
hlt:
b hlt
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