diff options
Diffstat (limited to 'sysdeps/unix/bsd/sequent/i386/sysdep.h')
| -rw-r--r-- | sysdeps/unix/bsd/sequent/i386/sysdep.h | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/sysdeps/unix/bsd/sequent/i386/sysdep.h b/sysdeps/unix/bsd/sequent/i386/sysdep.h new file mode 100644 index 0000000000..f1365e764e --- /dev/null +++ b/sysdeps/unix/bsd/sequent/i386/sysdep.h @@ -0,0 +1,82 @@ +/* System call interface code for Sequent Symmetry running Dynix version 3. +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 <sysdeps/unix/i386/sysdep.h> + +#ifdef ASSEMBLER + +/* Get the symbols for system call interrupts. */ +#include <machine/trap.h> + +/* Use the BSD versions of system calls, by setting the high 16 bits + of the syscall number (see /usr/include/syscall.h). */ +#define SYS_HANDLER (SYS_bsd << 16) + +/* Dynix uses an interrupt interface to system calls. + "int $T_SVCn" are syscall interfaces for 0-6 arg functions. + (see /usr/include/machine/trap.h). */ + +#undef DO_CALL + +#ifdef __STDC__ +#define DO_CALL(syscall_name, args) \ + movl $(SYS_HANDLER | SYS_##syscall_name), %eax; \ + int $T_SVC##args; +#else +#define DO_CALL(syscall_name, args) \ + movl $(SYS_HANDLER | SYS_/**/syscall_name), %eax; \ + int $T_SVC/**/args; +#endif + +#undef PSEUDO +#define PSEUDO(name, syscall_name, args) \ + .text; \ + .globl syscall_error; \ + .align 4; \ + ENTRY (name) \ + ARGS (args) \ + DO_CALL (syscall_name, args) \ + jb syscall_error + +/* For one and two-argument calls, Dynix takes the arguments in %ecx and + %edx. For 3-6 argument calls, Dynix takes the address of the first + argument in %ecx. */ + +#ifdef __STDC__ +#define ARGS(n) ARGS_##n +#else +#define ARGS(n) ARGS_/**/n +#endif + +#define ARGS_0 +#define ARGS_1 movl 4(%esp), %ecx; +#define ARGS_2 movl 4(%esp), %ecx; movl 8(%esp), %edx; +#define ARGS_3 leal 4(%esp), %ecx; +#define ARGS_4 ARGS_3 +#define ARGS_5 ARGS_3 +#define ARGS_6 ARGS_3 + +/* Dynix reverses %ecx and %edx relative to most i386 Unices. */ + +#undef r1 +#define r1 %ecx /* Secondary return-value register. */ +#undef scratch +#define scratch %edx /* Call-clobbered register for random use. */ + +#endif /* ASSEMBLER */ |