diff options
Diffstat (limited to 'libc/sysdeps')
| -rw-r--r-- | libc/sysdeps/linux/sparc/Makefile | 6 | ||||
| -rw-r--r-- | libc/sysdeps/linux/sparc/__longjmp.S | 92 | ||||
| -rw-r--r-- | libc/sysdeps/linux/sparc/bits/select.h | 7 | ||||
| -rw-r--r-- | libc/sysdeps/linux/sparc/crt0.S | 90 | ||||
| -rw-r--r-- | libc/sysdeps/linux/sparc/fork.c | 35 | ||||
| -rw-r--r-- | libc/sysdeps/linux/sparc/setjmp.S | 53 | ||||
| -rw-r--r-- | libc/sysdeps/linux/sparc/sysdep.h | 134 | ||||
| -rw-r--r-- | libc/sysdeps/linux/sparc/vfork.S | 30 |
8 files changed, 445 insertions, 2 deletions
diff --git a/libc/sysdeps/linux/sparc/Makefile b/libc/sysdeps/linux/sparc/Makefile index d7490d43d..fdc802b89 100644 --- a/libc/sysdeps/linux/sparc/Makefile +++ b/libc/sysdeps/linux/sparc/Makefile @@ -28,10 +28,12 @@ ASFLAGS=$(CFLAGS) CRT0=crt0.S CRT0_OBJ=$(patsubst %.S,%.o, $(CRT0)) -SSRC= +SSRC=__longjmp.S setjmp.S vfork.S +#SSRC=__longjmp.S _start.S setjmp.S vfork.S SOBJS=$(patsubst %.S,%.o, $(SSRC)) -CSRC= +CSRC=fork.c ptrace.c +#CSRC=fork.c ptrace.c COBJS=$(patsubst %.c,%.o, $(CSRC)) OBJS=$(SOBJS) $(MOBJ) $(COBJS) diff --git a/libc/sysdeps/linux/sparc/__longjmp.S b/libc/sysdeps/linux/sparc/__longjmp.S new file mode 100644 index 000000000..d0f8c73be --- /dev/null +++ b/libc/sysdeps/linux/sparc/__longjmp.S @@ -0,0 +1,92 @@ +/* Copyright (C) 1991, 93, 96, 97, 98, 99, 2000 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., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +/* Code taken from glibc/sysdeps/sparc/sparc32/ (glibc 2.2.2) */ + +//#include "sysdep.h" +#include <sysdep.h> + +#define _ASM 1 +#define _SETJMP_H +#include <bits/setjmp.h> +#define ENV(base,reg) [%base + (reg * 4)] +#define ST_FLUSH_WINDOWS 3 +#define RW_FP [%fp + 0x48] + +ENTRY(__longjmp) + /* Store our arguments in global registers so we can still + use them while unwinding frames and their register windows. */ + + ld ENV(o0,JB_FP), %g3 /* Cache target FP in register %g3. */ + mov %o0, %g1 /* ENV in %g1 */ + orcc %o1, %g0, %g2 /* VAL in %g2 */ + be,a 0f /* Branch if zero; else skip delay slot. */ + mov 1, %g2 /* Delay slot only hit if zero: VAL = 1. */ +0: + xor %fp, %g3, %o0 + add %fp, 512, %o1 + andncc %o0, 4095, %o0 + bne thread + //bne LOC(thread) + cmp %o1, %g3 + bl thread + //bl LOC(thread) + + /* Now we will loop, unwinding the register windows up the stack + until the restored %fp value matches the target value in %g3. */ + +//LOC(loop): +loop: + cmp %fp, %g3 /* Have we reached the target frame? */ + bl,a loop /* Loop while current fp is below target. */ + //bl,a LOC(loop) /* Loop while current fp is below target. */ + restore /* Unwind register window in delay slot. */ + be,a found /* Better have hit it exactly. */ + //be,a LOC(found) /* Better have hit it exactly. */ + ld ENV(g1,JB_SP), %o0 /* Delay slot: extract target SP. */ + +thread: +//LOC(thread): + /* + * Do a "flush register windows trap". The trap handler in the + * kernel writes all the register windows to their stack slots, and + * marks them all as invalid (needing to be sucked up from the + * stack when used). This ensures that all information needed to + * unwind to these callers is in memory, not in the register + * windows. + */ + ta ST_FLUSH_WINDOWS + ld ENV(g1,JB_PC), %o7 /* Set return PC. */ + ld ENV(g1,JB_SP), %fp /* Set saved SP on restore below. */ + sub %fp, 64, %sp /* Allocate a register frame. */ + st %g3, RW_FP /* Set saved FP on restore below. */ + retl + restore %g2, 0, %o0 /* Restore values from above register frame. */ + +found: +//LOC(found): + /* We have unwound register windows so %fp matches the target. */ + mov %o0, %sp /* OK, install new SP. */ + +//LOC(sp_ok): +sp_ok: + ld ENV(g1,JB_PC), %o0 /* Extract target return PC. */ + jmp %o0 + 8 /* Return there. */ + mov %g2, %o0 /* Delay slot: set return value. */ + +END(__longjmp) diff --git a/libc/sysdeps/linux/sparc/bits/select.h b/libc/sysdeps/linux/sparc/bits/select.h index 4513135af..f5a181092 100644 --- a/libc/sysdeps/linux/sparc/bits/select.h +++ b/libc/sysdeps/linux/sparc/bits/select.h @@ -20,6 +20,13 @@ # error "Never use <bits/select.h> directly; include <sys/select.h> instead." #endif +/* For some reason, this wants to use the definitions from + /include/asm/posix_types.h So we have to undef some symbols : +*/ +#undef __FD_ZERO +#undef __FD_SET +#undef __FD_CLR +#undef __FD_ISSET /* We don't use `memset' because this would require a prototype and the array isn't too big. */ diff --git a/libc/sysdeps/linux/sparc/crt0.S b/libc/sysdeps/linux/sparc/crt0.S new file mode 100644 index 000000000..7910131db --- /dev/null +++ b/libc/sysdeps/linux/sparc/crt0.S @@ -0,0 +1,90 @@ +/* + * xrt0.s for ERC32. + * + * This program 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 2 of the License, or (at your option) + * any later version. + * + * This program 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. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., 675 + * Mass Ave, Cambridge, MA 02139, USA. + * + */ + +/* code taken from leonccs 1.0 leon/src/libio/crt0.S + I don't know if this is available anymore, now that LECCS + is out. And I'm not sure if this source is in the LECCS distro :( +*/ + + .text +! Original : +! .global __start, _main +! uC-libc version : + .global _start + .global __uClibc_main + +! Start the real-time clock with a tick of 14 clocks +! + +_start: + + save %sp, -64, %sp + + /* clear the bss */ + + sethi %hi(edata),%g2 + or %g2,%lo(edata),%g2 ! g2 = start of bss + sethi %hi(_end),%g3 + or %g3,%lo(_end),%g3 ! g3 = end of bss + mov %g0,%g1 ! so std has two zeros +zerobss: + std %g0,[%g2] + add %g2,8,%g2 + cmp %g2,%g3 + bleu,a zerobss + nop + + /* move data segment to proper location */ + +relocd: + set (_endtext),%g2 ! g2 = start of data in aout file + set (_environ),%g4 ! g4 = start of where data should go + set (_edata),%g3 ! g3 = end of where data should go + subcc %g3, %g4, %g5 ! g5 = length of data + + subcc %g4, %g2, %g0 ! need to relocate data ? + ble initok + ld [%g4], %g6 +! subcc %g6, 1, %g0 +! be initok +mvdata: + subcc %g5, 8, %g5 + ldd [%g2 + %g5], %g6 + bg mvdata + std %g6, [%g4 + %g5] + +initok: + +! call _main + call __uClibc_main + nop +! Should not return from uClibc main() +! ret +! nop + + .seg "data" + .global .bdata +.bdata: + .align 8 + .global _environ ! first symbol in sdata +_environ: + .word 1 + + + diff --git a/libc/sysdeps/linux/sparc/fork.c b/libc/sysdeps/linux/sparc/fork.c new file mode 100644 index 000000000..af56d3675 --- /dev/null +++ b/libc/sysdeps/linux/sparc/fork.c @@ -0,0 +1,35 @@ +/* vi: set sw=4 ts=4: */ +/* + * fork for uClibc + * + * Copyright (C) 2000 by Lineo, inc. Written by Erik Andersen + * <andersen@lineo.com>, <andersee@debian.org> + * + * This program 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. + * + * This program 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 this program; if not, write to the Free Software Foundation, + * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#include <errno.h> +#include <features.h> +#include <sys/types.h> +#include <sys/syscall.h> + +#ifndef __HAS_NO_MMU__ + +//#define __NR_fork 2 +#include <unistd.h> +_syscall0(pid_t, fork); + +#endif diff --git a/libc/sysdeps/linux/sparc/setjmp.S b/libc/sysdeps/linux/sparc/setjmp.S new file mode 100644 index 000000000..8f279ca5d --- /dev/null +++ b/libc/sysdeps/linux/sparc/setjmp.S @@ -0,0 +1,53 @@ +/* Copyright (C) 1991, 93, 94, 96, 97, 98 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., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +/* Code taken from glibc2.2.2/sysdeps/sparc/sparc32/setjmp.S */ + +#include <sysdep.h> +#include <sys/trap.h> + +#define _ASM 1 +#define _SETJMP_H +#include <bits/setjmp.h> + +ENTRY(_setjmp) + b 1f + set 0, %o1 +END(_setjmp) + +ENTRY(setjmp) + set 1, %o1 +END(setjmp) + +ENTRY (__sigsetjmp) +1: + /* Save our PC, SP and FP. Save the signal mask if requested with + a tail-call for simplicity; it always returns zero. */ + ta ST_FLUSH_WINDOWS + + st %o7, [%o0 + (JB_PC * 4)] + st %sp, [%o0 + (JB_SP * 4)] + st %fp, [%o0 + (JB_FP * 4)] + + mov %o7, %g1 + call __sigjmp_save + mov %g1, %o7 +END(__sigsetjmp) + +//weak_extern(_setjmp) +//weak_extern(setjmp) diff --git a/libc/sysdeps/linux/sparc/sysdep.h b/libc/sysdeps/linux/sparc/sysdep.h new file mode 100644 index 000000000..015dd6e1b --- /dev/null +++ b/libc/sysdeps/linux/sparc/sysdep.h @@ -0,0 +1,134 @@ +/* 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. */ + +#include <sys/syscall.h> + +/* Not that using a `PASTE' macro loses. */ +#ifdef __STDC__ + +#ifdef __ELF__ + +#define SYSCALL_WEAK_ALIAS(alias,orig) \ + .weak alias; \ + alias=__libc_##orig + +/* +#ifdef _POSIX_THREADS +*/ + +#if 1 + +#ifdef PTHREAD_KERNEL + +/* Use the regular ELF conventions about underscores, and provide the + weak symbol, as required */ +#define SYSCALL__(name,args) PSEUDO (__machdep_sys_##name, name, args) \ +.weak machdep_sys_##name; \ + machdep_sys_##name = __machdep_sys_##name; \ +.type __machdep_sys_##name,@function; \ +.type machdep_sys_##name,@function; \ +.L__machdep_sys_##name##end: .size __machdep_sys_##name,.L__machdep_sys_##name##end - __machdep_sys_##name + +#define SYSCALL(name,args) PSEUDO (__machdep_sys_##name, name, args) \ +.weak machdep_sys_##name; \ + machdep_sys_##name = __machdep_sys_##name; \ +.type __machdep_sys_##name,@function; \ +.type machdep_sys_##name,@function; \ +.L__machdep_sys_##name##end: .size __machdep_sys_##name,.L__machdep_sys_##name##end - __machdep_sys_##name + +#else /* PTHREAD_KERNEL */ + +/* Use the regular ELF conventions about underscores, and provide the + weak symbol, as required */ +#define SYSCALL__(name,args) PSEUDO (__libc_##name, name, args) \ +.weak __##name; \ +.weak name; \ + __##name = __libc_##name; \ + name = __libc_##name; \ +.type __libc_##name,@function; \ +.type name,@function; \ +.type __##name,@function; \ +.L__libc_##name##end: .size __libc_##name,.L__libc_##name##end - __libc_##name + +#define SYSCALL(name,args) PSEUDO (__libc_##name, name, args) \ +.weak name; \ + name = __libc_##name; \ +.type __libc_##name,@function; \ +.type name,@function; \ +.L__libc_##name##end: .size __libc_##name,.L__libc_##name##end - __libc_##name + +#endif /* PTHREAD_KERNEL */ + +#else /* _POSIX_THREADS */ + +/* Use the regular ELF conventions about underscores, and provide the + weak symbol, as required */ +#define SYSCALL__(name,args) PSEUDO (__libc_##name, name, args) \ +.weak name; \ + __##name = __libc_##name; \ + name = __libc_##name; \ +.type __libc_##name,@function; \ +.type name,@function; \ +.type __##name,@function; \ +.L__libc_##name##end: .size __libc_##name,.L__libc_##name##end - __libc_##name + +#define SYSCALL(name,args) PSEUDO (__libc_##name, name, args) \ + name = __libc_##name; \ +.type __libc_##name,@function; \ +.type name,@function; \ +.L__libc_##name##end: .size __libc_##name,.L__libc_##name##end - __libc_##name + +#endif /* _POSIX_THREADS */ + +#else /* __ELF__ */ + +#define SYSCALL_WEAK_ALIAS(alias,orig) + +/* Regular a.out definition */ +#define SYSCALL__(name,args) PSEUDO (__##name, name, args) +#define SYSCALL(name,args) PSEUDO (name, name, args) + +#endif /* __ELF__ */ + +#else /* __STDC__ */ + +#define SYSCALL__(name,args) PSEUDO (__/**/name, name, args) +#define SYSCALL(name,args) PSEUDO (name, name, args) + +#endif /* __STDC__ */ + +/* Machine-dependent sysdep.h files are expected to define the macro + PSEUDO (function_name, syscall_name) to emit assembly code to define the + C-callable function FUNCTION_NAME to do system call SYSCALL_NAME. + r0 and r1 are the system call outputs. movl should be defined as + an instruction such that "movl r1, r0" works. ret should be defined + as the return instruction. */ + + +#if !defined(HAVE_GNU_LD) && !defined (__ELF__) +#define ___errno _errno +#endif + +#define HAVE_SYSCALLS + +#define ENTRY(name) + .global name; + .align 4; + +#define END(name) + .size name,.-name; diff --git a/libc/sysdeps/linux/sparc/vfork.S b/libc/sysdeps/linux/sparc/vfork.S new file mode 100644 index 000000000..336dfdd59 --- /dev/null +++ b/libc/sysdeps/linux/sparc/vfork.S @@ -0,0 +1,30 @@ +/* Copyright (C) 1999 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Jakub Jelinek <jj@ultra.linux.cz>, 1999. + + 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., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +/* Code taken from glibc2.2.2/sysdeps/unix/sysv/linux/sparc/vfork.S */ + +#include <sysdep.h> + +PSEUDO (__vfork, vfork, 0) + sub %o1, 1, %o1 + retl + and %o0, %o1, %o0 + +PSEUDO_END (__vfork) +weak_alias (__vfork, vfork) |