From 56e5d28c812ad3851c02d20df93cd6f00ada64bb Mon Sep 17 00:00:00 2001 From: Eric Andersen Date: Thu, 10 Aug 2000 19:47:55 +0000 Subject: More stuff. Down to only 43 missing functions before BusyBox will link. Fixed socket stuff so it doesn't pull in kernel headers and stubbed out fork and clone. A few other header file cleanups. -Erik --- libc/sysdeps/linux/i386/Makefile | 2 +- libc/sysdeps/linux/i386/bits/uio.h | 46 ++++++++++++++++++++ libc/sysdeps/linux/i386/clone.S | 87 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 134 insertions(+), 1 deletion(-) create mode 100644 libc/sysdeps/linux/i386/bits/uio.h create mode 100644 libc/sysdeps/linux/i386/clone.S (limited to 'libc/sysdeps/linux/i386') diff --git a/libc/sysdeps/linux/i386/Makefile b/libc/sysdeps/linux/i386/Makefile index 4db2b57fc..57fed3bf4 100644 --- a/libc/sysdeps/linux/i386/Makefile +++ b/libc/sysdeps/linux/i386/Makefile @@ -15,7 +15,7 @@ LIBC=$(TOPDIR)libc.a $(CC) $(CFLAGS) -c -o $*.o $< SSRC=syscalls.S -OBJ= setjmp.o longjmp.o readdir.o _start.o _exit.o #select.o +OBJ= setjmp.o longjmp.o readdir.o _start.o _exit.o fork.o #select.o include makefile.objs all: $(LIBC) diff --git a/libc/sysdeps/linux/i386/bits/uio.h b/libc/sysdeps/linux/i386/bits/uio.h new file mode 100644 index 000000000..38ac17baa --- /dev/null +++ b/libc/sysdeps/linux/i386/bits/uio.h @@ -0,0 +1,46 @@ +/* Copyright (C) 1996, 1997 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. */ + +#ifndef _SYS_UIO_H +# error "Never include directly; use instead." +#endif + + +#include + + +/* We should normally use the Linux kernel header file to define this + type and macros but this calls for trouble because of the header + includes other kernel headers. */ + +/* Size of object which can be written atomically. + + This macro has different values in different kernel versions. The + latest versions of ther kernel use 1024 and this is good choice. Since + the C library implementation of readv/writev is able to emulate the + functionality even if the currently running kernel does not support + this large value the readv/writev call will not fail because of this. */ +#define UIO_MAXIOV 1024 + + +/* Structure for scatter/gather I/O. */ +struct iovec + { + void *iov_base; /* Pointer to data. */ + size_t iov_len; /* Length of data. */ + }; diff --git a/libc/sysdeps/linux/i386/clone.S b/libc/sysdeps/linux/i386/clone.S new file mode 100644 index 000000000..7a2025b53 --- /dev/null +++ b/libc/sysdeps/linux/i386/clone.S @@ -0,0 +1,87 @@ +/* Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Richard Henderson (rth@tamu.edu) + + 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. */ + +/* clone() is even more special than fork() as it mucks with stacks + and invokes a function in the right context after its all over. */ + +#include +#define _ERRNO_H 1 +#include +#include + +/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg); */ + + .text +ENTRY(__clone) + /* Sanity check arguments. */ + movl $-EINVAL,%eax + movl 4(%esp),%ecx /* no NULL function pointers */ +#ifdef PIC + jecxz SYSCALL_ERROR_LABEL +#else + testl %ecx,%ecx + jz SYSCALL_ERROR_LABEL +#endif + movl 8(%esp),%ecx /* no NULL stack pointers */ +#ifdef PIC + jecxz SYSCALL_ERROR_LABEL +#else + testl %ecx,%ecx + jz SYSCALL_ERROR_LABEL +#endif + + /* Insert the argument onto the new stack. */ + subl $8,%ecx + movl 16(%esp),%eax /* no negative argument counts */ + movl %eax,4(%ecx) + + /* Save the function pointer as the zeroth argument. + It will be popped off in the child in the ebx frobbing below. */ + movl 4(%esp),%eax + movl %eax,0(%ecx) + + /* Do the system call */ + pushl %ebx + movl 16(%esp),%ebx + movl $SYS_ify(clone),%eax + int $0x80 + popl %ebx + + test %eax,%eax + jl SYSCALL_ERROR_LABEL + jz thread_start + +L(pseudo_end): + ret + +thread_start: + subl %ebp,%ebp /* terminate the stack frame */ + call *%ebx +#ifdef PIC + call L(here) +L(here): + popl %ebx + addl $_GLOBAL_OFFSET_TABLE_+[.-L(here)], %ebx +#endif + pushl %eax + call JUMPTARGET (_exit) + +PSEUDO_END (__clone) + +weak_alias (__clone, clone) -- cgit v1.2.3