projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| c4029823 | 1 | /* Copyright (C) 1993, 1995, 1996 Free Software Foundation, Inc. |
| 28f540f4 RM |
2 | Contributed by Brendan Kehoe (brendan@zen.org). |
| 3 | ||
| 4 | The GNU C Library is free software; you can redistribute it and/or | |
| 5 | modify it under the terms of the GNU Library General Public License as | |
| 6 | published by the Free Software Foundation; either version 2 of the | |
| 7 | License, or (at your option) any later version. | |
| 8 | ||
| 9 | The GNU C Library is distributed in the hope that it will be useful, | |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 12 | Library General Public License for more details. | |
| 13 | ||
| 14 | You should have received a copy of the GNU Library General Public | |
| 15 | License along with the GNU C Library; see the file COPYING.LIB. If | |
| 16 | not, write to the Free Software Foundation, Inc., 675 Mass Ave, | |
| 17 | Cambridge, MA 02139, USA. */ | |
| 18 | ||
| 19 | #include <sysdep.h> | |
| 20 | ||
| c4029823 | 21 | __errno: |
| 28f540f4 RM |
22 | .comm errno, 4 |
| 23 | ||
| 24 | ENTRY(__start) | |
| 25 | .set noreorder | |
| 26 | ||
| 27 | /* The first thing on the stack is argc. */ | |
| 28 | lw s0, 0(sp) | |
| 29 | nop | |
| 30 | ||
| 31 | /* Set up the global pointer. */ | |
| 32 | la gp, _gp | |
| 33 | ||
| 34 | /* Then set up argv. */ | |
| 35 | addiu s1, sp, 4 | |
| 36 | ||
| 37 | /* To compute where envp is, first we have to jump ahead four | |
| 38 | bytes from what argv was. This will bring us ahead, so we don't | |
| 39 | need to compute the NULL at the end of argv later. */ | |
| 40 | addiu v1, s1, 4 | |
| 41 | ||
| 42 | /* Now, compute the space to skip given the number of arguments | |
| 43 | we've got. We do this by multiplying argc by 4. */ | |
| 44 | sll v0, s0, 2 | |
| 45 | ||
| 46 | /* Now, add (argv+4) with the space to skip...that's envp. */ | |
| 47 | addu s2, v1, v0 | |
| 48 | ||
| 49 | /* __environ = envp; */ | |
| 50 | sw s2, __environ | |
| 51 | ||
| 52 | addiu sp, sp, -24 | |
| 53 | ||
| 54 | /* __libc_init (argc, argv, envp); */ | |
| 55 | move a0, s0 | |
| 56 | move a1, s1 | |
| 57 | jal __libc_init | |
| 58 | move a2, s2 | |
| 59 | ||
| 60 | /* errno = 0; */ | |
| 61 | sw zero, errno | |
| 62 | ||
| 63 | /* exit (main (argc, argv, envp)); */ | |
| 64 | move a0, s0 | |
| 65 | move a1, s1 | |
| 66 | jal main | |
| 67 | move a2, s2 | |
| 68 | ||
| 69 | /* Make the value returned by main be the argument to exit. */ | |
| 70 | jal exit | |
| 71 | move a0, v0 | |
| 77162807 | 72 | .end __start |