diff options
Diffstat (limited to 'sysdeps/unix/sysv/i386/linux')
| -rw-r--r-- | sysdeps/unix/sysv/i386/linux/socket.S | 55 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/i386/linux/sysdep.S | 38 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/i386/linux/sysdep.h | 57 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/i386/linux/wait.S | 31 |
4 files changed, 181 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/i386/linux/socket.S b/sysdeps/unix/sysv/i386/linux/socket.S new file mode 100644 index 0000000000..9f59bad095 --- /dev/null +++ b/sysdeps/unix/sysv/i386/linux/socket.S @@ -0,0 +1,55 @@ +/* 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 <sysdep.h> + +.globl syscall_error + +/* The socket-oriented system calls are handled unusally in Linux. + They are all gated through the single `socketcall' system call number. + `socketcall' takes two arguments: the first is the subcode, specifying + which socket function is being called; and the second is a pointer to + the arguments to specific function. + + The .S files for the other calls just #define socket and #include this. */ + +ENTRY (socket) + + /* Save registers. */ + pushl %ebx + pushl %ecx + + movl $__NR_socketcall, %eax /* System call number in %eax. */ + + /* Use ## so `socket' is a separate token that might be #define'd. */ + movl $SYS_##socket, %ebx /* Subcode is first arg to syscall. */ + lea 12(%esp), %ecx /* Address of args in 2nd arg. */ + + /* Do the system call trap. */ + int $0x80 + + /* Restore registers. */ + popl %ecx + popl %ebx + + /* %eax is < 0 if there was an error. */ + testl %eax, %eax + jl syscall_error + + /* Successful; return the syscall's value. */ + ret diff --git a/sysdeps/unix/sysv/i386/linux/sysdep.S b/sysdeps/unix/sysv/i386/linux/sysdep.S new file mode 100644 index 0000000000..ed3a2782a9 --- /dev/null +++ b/sysdeps/unix/sysv/i386/linux/sysdep.S @@ -0,0 +1,38 @@ +/* Copyright (C) 1992, 1993, 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> + +/* We jump here when a system call gets an error. + The error number is negated in %eax. */ +.globl syscall_error +syscall_error: + negl %eax /* Make it positive. */ +#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. */ + cmpl %eax, $EWOULDBLOCK_sys /* Is it the old EWOULDBLOCK? */ + jne 0f /* Branch if not. */ + move $EAGAIN, %eax /* Yes; translate it to EAGAIN. */ +#endif +0: movl %eax, _errno /* Store it in `errno'. */ + move $-1, %eax /* Return -1. */ + ret diff --git a/sysdeps/unix/sysv/i386/linux/sysdep.h b/sysdeps/unix/sysv/i386/linux/sysdep.h new file mode 100644 index 0000000000..298a0e4c5b --- /dev/null +++ b/sysdeps/unix/sysv/i386/linux/sysdep.h @@ -0,0 +1,57 @@ +/* Copyright (C) 1992, 1993 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> + +#define ENTRY(name) \ + .globl _##name; \ + .align 2; \ + _##name##: + +#define PSEUDO(name, syscall_name, args) \ + .text; \ + .globl syscall_error; \ + ENTRY (name) \ + XCHG_##args + movl $SYS_##syscall_name, %eax; \ + int $0x80; \ + test %eax, %eax; \ + jl syscall_error; \ + XCHG_##args + +/* Linux takes system call arguments in registers: + 1: %ebx + 2: %ecx + 3: %edx + 4: %esi + 5: %edi + We put the arguments into registers from the stack, + and save the registers, by using the 386 `xchg' instruction + to swap the values in both directions. */ + +#define XCHG_0 /* No arguments to frob. */ +#define XCHG_1 xchg 8(%esp), %ebx; XCHG_0 +#define XCHG_2 xchg 12(%esp), %ecx; XCHG_1 +#define XCHG_3 xchg 16(%esp), %edx; XCHG_2 +#define XCHG_4 xchg 20(%esp), %esi; XCHG_3 +#define XCHG_5 xchg 24(%esp), %edi; XCHG_3 + +#define r0 %eax /* Normal return-value register. */ +#define r1 %edx /* Secondary return-value register. */ +#define scratch %ecx /* Call-clobbered register for random use. */ +#define MOVE(x,y) movl x, y diff --git a/sysdeps/unix/sysv/i386/linux/wait.S b/sysdeps/unix/sysv/i386/linux/wait.S new file mode 100644 index 0000000000..4be64c47c9 --- /dev/null +++ b/sysdeps/unix/sysv/i386/linux/wait.S @@ -0,0 +1,31 @@ +/* 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 (__wait) + movl 0(%esp), %eax /* Fetch the return address. */ + movl $-1, 0(%esp) /* First arg is -1. */ + /* Second arg is our arg at 4(%esp). */ + pushl $0 /* Third arg is 0. */ + pushl %eax /* Push the return address. */ + + /* Jump to waitpid; it will return to our caller. */ + jmp ___waitpid + +weak_alias (__wait, wait) |