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Diffstat (limited to 'libgcc/config/sparc/sol2-c1.S')
| -rw-r--r-- | libgcc/config/sparc/sol2-c1.S | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/libgcc/config/sparc/sol2-c1.S b/libgcc/config/sparc/sol2-c1.S new file mode 100644 index 0000000..63aa748 --- /dev/null +++ b/libgcc/config/sparc/sol2-c1.S @@ -0,0 +1,103 @@ +! crt1.s for sparc & sparcv9 (SunOS 5) + +! Copyright (C) 1992, 2009 Free Software Foundation, Inc. +! Written By David Vinayak Henkel-Wallace, June 1992 +! +! This file is free software; you can redistribute it and/or modify it +! under the terms of the GNU General Public License as published by the +! Free Software Foundation; either version 3, or (at your option) any +! later version. +! +! This file 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 +! General Public License for more details. +! +! Under Section 7 of GPL version 3, you are granted additional +! permissions described in the GCC Runtime Library Exception, version +! 3.1, as published by the Free Software Foundation. +! +! You should have received a copy of the GNU General Public License and +! a copy of the GCC Runtime Library Exception along with this program; +! see the files COPYING3 and COPYING.RUNTIME respectively. If not, see +! <http://www.gnu.org/licenses/>. + +! This file takes control of the process from the kernel, as specified +! in section 3 of the SVr4 ABI. +! This file is the first thing linked into any executable. + +#ifdef __sparcv9 +#define CPTRSIZE 8 +#define CPTRSHIFT 3 +#define STACK_BIAS 2047 +#define ldn ldx +#define stn stx +#define setn(s, scratch, dst) setx s, scratch, dst +#else +#define CPTRSIZE 4 +#define CPTRSHIFT 2 +#define STACK_BIAS 0 +#define ldn ld +#define stn st +#define setn(s, scratch, dst) set s, dst +#endif + + .section ".text" + .proc 022 + .global _start + +_start: + mov 0, %fp ! Mark bottom frame pointer + ldn [%sp + (16 * CPTRSIZE) + STACK_BIAS], %l0 ! argc + add %sp, (17 * CPTRSIZE) + STACK_BIAS, %l1 ! argv + + ! Leave some room for a call. Sun leaves 32 octets (to sit on + ! a cache line?) so we do too. +#ifdef __sparcv9 + sub %sp, 48, %sp +#else + sub %sp, 32, %sp +#endif + + ! %g1 may contain a function to be registered w/atexit + orcc %g0, %g1, %g0 +#ifdef __sparcv9 + be %xcc, .nope +#else + be .nope +#endif + mov %g1, %o0 + call atexit + nop +.nope: + ! Now make sure constructors and destructors are handled. + setn(_fini, %o1, %o0) + call atexit, 1 + nop + call _init, 0 + nop + + ! We ignore the auxiliary vector; there is no defined way to + ! access those data anyway. Instead, go straight to main: + mov %l0, %o0 ! argc + mov %l1, %o1 ! argv +#ifdef GCRT1 + setn(___Argv, %o4, %o3) + stn %o1, [%o3] ! *___Argv +#endif + ! Skip argc words past argv, to env: + sll %l0, CPTRSHIFT, %o2 + add %o2, CPTRSIZE, %o2 + add %l1, %o2, %o2 ! env + setn(_environ, %o4, %o3) + stn %o2, [%o3] ! *_environ + call main, 4 + nop + call exit, 0 + nop + call _exit, 0 + nop + ! We should never get here. + + .type _start,#function + .size _start,.-_start |