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- /* Copyright (C) 1991, 1992 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If
- not, write to the Free Software Foundation, Inc., 675 Mass Ave,
- Cambridge, MA 02139, USA. */
- /* When we enter this piece of code, the user stack looks like this:
- * argc argument counter (integer)
- * argv[0] program name (pointer)
- * argv[1...N] program args (pointers)
- * NULL
- * env[0...N] environment variables (pointers)
- * NULL
-
- * When we are done here, we want
- * R0=argc
- * R1=*argv[0]
- * R2=*envp[0]
- */
- #include <features.h>
- .text
- .align 2
- .global __start;
- .type __start,STT_FUNC;
- .global ___uClibc_main;
- .type ___uClibc_main,STT_FUNC;
- /* 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,STT_FUNC;
- __start:
- #ifdef __BFIN_FDPIC__
- /* P0 contains a pointer to the program's load map. */
- call .Lcall;
- .Lcall:
- R4 = RETS;
- SP += -12;
- R0.L = .Lcall;
- R0.H = .Lcall;
- R1.L = __ROFIXUP_LIST__;
- R1.H = __ROFIXUP_LIST__;
- R2.L = __ROFIXUP_END__;
- R2.H = __ROFIXUP_END__;
- R1 = R1 - R0;
- R1 = R1 + R4;
- R2 = R2 - R0;
- R2 = R2 + R4;
- R0 = P0;
- CALL ___self_reloc;
- SP += 12;
- P3 = R0;
- #endif
- /* clear the frame pointer and the L registers. */
- FP = 0;
- L0 = 0;
- L1 = 0;
- L2 = 0;
- L3 = 0;
-
- /* Load register R1 (argc) from the stack to its final resting place */
- P0 = SP;
- R1 = [P0++];
- /* Copy argv pointer into R2 -- which its final resting place */
- R2 = P0;
- /* Skip to the end of argv and put a pointer to the environment in
- [SP + 12] */
- R3 = R1;
- R3 <<= 2;
- R3 += 4;
- R3 = R2 + R3;
- SP += -24;
- [SP + 12] = R3;
- /* Ok, now run uClibc's main() -- shouldn't return */
- #if defined L_crt1 && defined __UCLIBC_CTOR_DTOR__
- #ifdef __BFIN_FDPIC__
- R3 = [P3 + __init@FUNCDESC_GOT17M4];
- #else
- R3.H = __init;
- R3.L = __init;
- #endif
- [SP+16] = R3;
- #ifdef __BFIN_FDPIC__
- R3 = [P3 + __fini@FUNCDESC_GOT17M4];
- #else
- R3.H = __fini;
- R3.L = __fini;
- #endif
- [SP+20] = R3;
- #else /* no ctor/dtor handling */
- R3 = 0;
- [SP + 16] = R3;
- [SP + 20] = R3;
- #endif
- #ifdef __BFIN_FDPIC__
- R0 = [P3 + _main@FUNCDESC_GOT17M4];
- #else
- R0.H = _main;
- R0.L = _main;
- #endif
- jump.l ___uClibc_main;
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