diff options
Diffstat (limited to 'sysdeps/unix/sparc')
| -rw-r--r-- | sysdeps/unix/sparc/brk.S | 55 | ||||
| -rw-r--r-- | sysdeps/unix/sparc/fork.S | 30 | ||||
| -rw-r--r-- | sysdeps/unix/sparc/pipe.S | 29 | ||||
| -rw-r--r-- | sysdeps/unix/sparc/start.c | 184 | ||||
| -rw-r--r-- | sysdeps/unix/sparc/sysdep.S | 47 | ||||
| -rw-r--r-- | sysdeps/unix/sparc/sysdep.h | 50 | ||||
| -rw-r--r-- | sysdeps/unix/sparc/vfork.S | 34 |
7 files changed, 429 insertions, 0 deletions
diff --git a/sysdeps/unix/sparc/brk.S b/sysdeps/unix/sparc/brk.S new file mode 100644 index 0000000..7906695 --- /dev/null +++ b/sysdeps/unix/sparc/brk.S @@ -0,0 +1,55 @@ +/* Copyright (C) 1993, 1995 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. */ + +#include <sysdep.h> + +#ifndef SYS_brk +#define SYS_brk 17 +#endif + +#ifndef C_SYMBOL_NAME +#define C_SYMBOL_NAME(name) _##name +#endif + +.data +.global C_SYMBOL_NAME(__curbrk) +C_LABEL(__curbrk) +#ifdef HAVE_GNU_LD + .long C_SYMBOL_NAME(_end) +#else + .long C_SYMBOL_NAME(end) +#endif + +.text +ENTRY (__brk) + add %o0, 7, %o0 + andn %o0, 7, %o0 + mov SYS_brk, %g1 + mov %o0, %o1 /* Save rounded value. */ + ta %g0 + bcs error + sethi %hi(C_SYMBOL_NAME(__curbrk)), %g1 + st %o1, [%g1 + %lo(C_SYMBOL_NAME(__curbrk))] + ret +error: sethi %hi(C_SYMBOL_NAME(errno)), %g1 + st %o0, [%g1 + %lo(C_SYMBOL_NAME(errno))] + sub %g0, 1, %o0 + retl + nop /* Fill the delay slot. */ + +weak_alias (__brk, brk) diff --git a/sysdeps/unix/sparc/fork.S b/sysdeps/unix/sparc/fork.S new file mode 100644 index 0000000..dee15ad --- /dev/null +++ b/sysdeps/unix/sparc/fork.S @@ -0,0 +1,30 @@ +/* Copyright (C) 1991, 1992, 1994, 1995 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. */ + +#include <sysdep.h> + +SYSCALL__ (fork, 0) + /* %o1 is now 0 for the parent and 1 for the child. Decrement it to + make it -1 (all bits set) for the parent, and 0 (no bits set) + for the child. Then AND it with %o0, so the parent gets + %o0&-1==0, and the child gets %o0&0==0. */ + sub %o1, 1, %o1 + retl + and %o0, %o1, %o0 + +weak_alias (__fork, fork) diff --git a/sysdeps/unix/sparc/pipe.S b/sysdeps/unix/sparc/pipe.S new file mode 100644 index 0000000..3929413 --- /dev/null +++ b/sysdeps/unix/sparc/pipe.S @@ -0,0 +1,29 @@ +/* Copyright (C) 1991, 1992, 1995 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. */ + +#include <sysdep.h> + +ENTRY (__pipe) + mov %o0, %o2 /* Save PIPEDES. */ +PSEUDO (__Spipe, pipe, 1) + st %o0, [%o2] /* PIPEDES[0] = %o0; */ + st %o1, [%o2 + 4] /* PIPEDES[1] = %o1; */ + retl /* return 0; */ + clr %o0 + +weak_alias (__pipe, pipe) diff --git a/sysdeps/unix/sparc/start.c b/sysdeps/unix/sparc/start.c new file mode 100644 index 0000000..e0f39f5 --- /dev/null +++ b/sysdeps/unix/sparc/start.c @@ -0,0 +1,184 @@ +/* Copyright (C) 1991, 1992, 1993, 1994, 1995 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. */ + +#include <ansidecl.h> +#include <errno.h> +#include <stdlib.h> +#include <unistd.h> +#include <fcntl.h> + +#ifndef NO_SHLIB +#include <sys/exec.h> +#include <sys/types.h> +#include <sys/mman.h> +#include <link.h> +#include <syscall.h> +#endif + +#if !defined (__GNUC__) || __GNUC__ < 2 + #error This file uses GNU C extensions; you must compile with GCC version 2. +#endif + +/* The first piece of initialized data. */ +int __data_start = 0; +#ifdef HAVE_WEAK_SYMBOLS +weak_alias (__data_start, data_start) +#endif + +VOLATILE int errno; + +#ifdef HAVE_WEAK_SYMBOLS +weak_alias (__environ, environ) +#else +#undef environ +#define __environ environ +#endif + +char **__environ; + +extern void EXFUN(__libc_init, (int argc, char **argv, char **envp)); +extern int EXFUN(main, (int argc, char **argv, char **envp)); + +register long int sp asm("%sp"), fp asm("%fp"); + +#ifndef NO_SHLIB +static void EXFUN(init_shlib, (NOARGS)); +#endif + +#ifndef NO_EXPLICIT_START +/* Declare _start with an explicit assembly symbol name of `start' + (note no leading underscore). This is the name Sun's crt0.o uses, + and programs are often linked with `ld -e start'. */ +void _start (void) asm ("start"); +#endif + +void +_start (void) +{ + /* It is important that these be declared `register'. + Otherwise, when compiled without optimization, they are put on the + stack, which loses completely after we zero the FP. */ + register int argc; + register char **argv, **envp; + + /* Unwind the frame built when we entered the function. */ + asm("restore"); + + /* And clear the frame pointer. */ + fp = 0; + + /* The argument info starts after one register + window (64 bytes) past the SP. */ + argc = ((int *) sp)[16]; + argv = (char **) &((int *) sp)[17]; + envp = &argv[argc + 1]; + __environ = envp; + +#ifndef NO_SHLIB + init_shlib (); +#endif + + /* Allocate 24 bytes of stack space for the register save area. */ + sp -= 24; + __libc_init (argc, argv, envp); + + exit (main (argc, argv, envp)); +} + +#ifndef NO_SHLIB + +/* System calls for use by the bootstrap routine. + These are defined here since the usual calls may be dynamically linked. */ + +int syscall (int sysno, ...) asm ("init_syscall"); +asm ("init_syscall:\n" + " clr %g1\n" + " ta 0\n" + " bcc 1f\n" + " sethi %hi(_errno), %g1\n" + " st %o0, [%g1 + %lo(_errno)]\n" + " sub %g0, 1, %o0\n" + "1:retl\n" + " nop"); + +static void +DEFUN_VOID(init_shlib) +{ + extern struct link_dynamic _DYNAMIC; + int so, zf; + caddr_t somap; + caddr_t sodmap; + caddr_t sobssmap; + void (*ldstart) (int, int); + struct exec soexec; + struct + { + caddr_t crt_ba; + int crt_dzfd; + int crt_ldfd; + struct link_dynamic *crt_dp; + char **crt_ep; + caddr_t crt_bp; + } soarg; + + /* If not dynamically linked, do nothing. */ + if (&_DYNAMIC == 0) + return; + + /* Map in the dynamic linker. */ + so = syscall (SYS_open, "/usr/lib/ld.so", O_RDONLY); + if (syscall (SYS_read, so, &soexec, sizeof (soexec)) != sizeof (soexec) + || soexec.a_magic != ZMAGIC) + { + static CONST char emsg[] = "crt0: no /usr/lib/ld.so\n"; + + syscall (SYS_write, 2, emsg, sizeof (emsg) - 1); + syscall (SYS_exit, 127); + } + somap = (caddr_t) syscall (SYS_mmap, 0, + soexec.a_text + soexec.a_data + soexec.a_bss, + PROT_READ | PROT_EXEC, _MAP_NEW | MAP_PRIVATE, + so, 0); + sodmap = (caddr_t) syscall (SYS_mmap, somap + soexec.a_text, soexec.a_data, + PROT_READ | PROT_WRITE | PROT_EXEC, + _MAP_NEW | MAP_FIXED | MAP_PRIVATE, + so, soexec.a_text); + zf = syscall (SYS_open, "/dev/zero", O_RDONLY); + if (soexec.a_bss != 0) + sobssmap = (caddr_t) syscall (SYS_mmap, + somap + soexec.a_text + soexec.a_data, + soexec.a_bss, + PROT_READ | PROT_WRITE | PROT_EXEC, + _MAP_NEW | MAP_FIXED | MAP_PRIVATE, + zf, 0); + + /* Call the entry point of the dynamic linker. */ + soarg.crt_ba = somap; + soarg.crt_dzfd = zf; + soarg.crt_ldfd = so; + soarg.crt_dp = &_DYNAMIC; + soarg.crt_ep = __environ; + soarg.crt_bp = (caddr_t) &&retaddr; + + ldstart = (__typeof (ldstart)) (somap + soexec.a_entry); + (*ldstart) (1, (char *) &soarg - (char *) sp); + + retaddr: +} + +#endif diff --git a/sysdeps/unix/sparc/sysdep.S b/sysdeps/unix/sparc/sysdep.S new file mode 100644 index 0000000..d04a778 --- /dev/null +++ b/sysdeps/unix/sparc/sysdep.S @@ -0,0 +1,47 @@ +/* Copyright (C) 1994 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. */ + +#include <sysdep.h> +#define _ERRNO_H +#include <errnos.h> + +.global C_SYMBOL_NAME(errno) +.global syscall_error + +.text +.align 2 +#undef syscall_error +#ifdef NO_UNDERSCORES +__syscall_error: +#else +syscall_error: +#endif +#if defined (EWOULDBLOCK_sys) && EWOULDBLOCK_sys != EAGAIN + /* We translate the system's EWOULDBLOCK error into EAGAIN. + The GNU C library always defines EWOULDBLOCK==EAGAIN. + EWOULDBLOCK_sys is the original number. */ + cmp %o0, EWOULDBLOCK_sys + be,a notblock + mov EAGAIN, %o0 +#endif +notblock: /* Store the error code in `errno'. */ + sethi %hi(C_SYMBOL_NAME(errno)), %g1 + st %o0, [%g1 + %lo(C_SYMBOL_NAME(errno))] + /* And return -1. */ + retl + mov -1, %o0 diff --git a/sysdeps/unix/sparc/sysdep.h b/sysdeps/unix/sparc/sysdep.h new file mode 100644 index 0000000..eab661c --- /dev/null +++ b/sysdeps/unix/sparc/sysdep.h @@ -0,0 +1,50 @@ +/* Copyright (C) 1993, 1994, 1995 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. */ + +#include <sysdeps/unix/sysdep.h> + +#ifdef ASSEMBLER + +#ifdef NO_UNDERSCORES +/* Since C identifiers are not normally prefixed with an underscore + on this system, the asm identifier `syscall_error' intrudes on the + C name space. Make sure we use an innocuous name. */ +#define syscall_error C_SYMBOL_NAME(__syscall_error) +#endif + +#define ENTRY(name) \ + .global C_SYMBOL_NAME(name); \ + .align 2; \ + C_LABEL(name) + +#define PSEUDO(name, syscall_name, args) \ + .global syscall_error; \ + ENTRY (name) \ + mov SYS_ify(syscall_name), %g1; \ + ta 0; \ + bcc 1f; \ + sethi %hi(syscall_error), %g1; \ + jmp %g1 + %lo(syscall_error); nop; \ +1: + +#define ret retl; nop +#define r0 %o0 +#define r1 %o1 +#define MOVE(x,y) mov x, y + +#endif /* ASSEMBLER */ diff --git a/sysdeps/unix/sparc/vfork.S b/sysdeps/unix/sparc/vfork.S new file mode 100644 index 0000000..aeee378 --- /dev/null +++ b/sysdeps/unix/sparc/vfork.S @@ -0,0 +1,34 @@ +/* Copyright (C) 1991, 1992, 1994, 1995 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. */ + +#include <sysdep.h> + +#ifndef SYS_vfork +#define SYS_vfork 66 +#endif + +SYSCALL__ (vfork, 0) + /* %o1 is now 0 for the parent and 1 for the child. Decrement it to + make it -1 (all bits set) for the parent, and 0 (no bits set) + for the child. Then AND it with %o0, so the parent gets + %o0&-1==0, and the child gets %o0&0==0. */ + sub %o1, 1, %o1 + retl + and %o0, %o1, %o0 + +weak_alias (__vfork, vfork) |