--- /dev/null
+/* brk system call for Linux/m68k.
+Copyright (C) 1996 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 <errno.h>
+#include <unistd.h>
+#include <sysdep.h>
+
+void *__curbrk;
+
+int
+__brk (void *addr)
+{
+ void *newbrk;
+
+ {
+ register long d0 __asm__ ("%d0");
+
+ asm ("move%.l %2, %%d1\n"
+ "trap #0" /* Perform the system call. */
+ : "=d" (d0)
+ : "0" (SYS_ify (brk)), "g" (addr)
+ : "%d0", "%d1");
+ newbrk = (void *) d0;
+ }
+ __curbrk = newbrk;
+
+ if (newbrk < addr)
+ {
+ errno = ENOMEM;
+ return -1;
+ }
+
+ return 0;
+}
+weak_alias (__brk, brk)
+
--- /dev/null
+/* Copyright (C) 1996 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>
+
+ .text
+ SYSCALL_ERROR_HANDLER
+
+ENTRY (__mmap)
+
+ move.l #SYS_ify (mmap), %d0 /* System call number in %d0. */
+
+ lea 4(%sp), %a0 /* Address of args is 1st arg. */
+ move.l %a0, %d1
+
+ /* Do the system call trap. */
+ trap #0
+
+ /* Kludge: negative numbers are among the legal return values.
+ If %d0 is between -4096 and 0 then there was an error. */
+ cmp.l #-4096, %d0
+ jhi syscall_error
+
+ /* Successful; return the syscall's value. Copy it to %a0 because
+ mmap is declared to return a pointer. */
+ move.l %d0, %a0
+ rts
+
+weak_alias (__mmap, mmap)
--- /dev/null
+/* Copyright (C) 1996 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. */
+
+#include <sysdep.h>
+#define _ERRNO_H
+#include <errnos.h>
+
+/* Linux has two versions of the select system call. The old one expected
+ one argument which must be a pointer to a struct which contains the
+ five values. The new version expects the five arguments be given in the
+ registers. First try the new version, if it's not available fall back
+ to the old version. */
+
+ .text
+ SYSCALL_ERROR_HANDLER
+ENTRY (__select)
+
+#if 0 /* For now only use the old version. */
+ DO_CALL (#SYS_ify (_newselect), 5)
+ tst.l %d0
+ jmi 1f
+ rts
+
+1: move.l #-ENOSYS, %d1
+ cmp.l %d1, %d0
+ jne syscall_error /* Real error */
+
+ /* Try again using the old syscall interface. */
+#endif
+ lea 4(%sp), %a0
+ move.l %a0, %d1
+ move.l #SYS_ify (select), %d0
+ trap #0
+ tst.l %d0
+ jmi syscall_error
+ ret
+
+weak_alias (__select, select)
--- /dev/null
+/* Structure describing state saved while handling a signal. Linux/m68k version.
+Copyright (C) 1996 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. */
+
+/* State of this thread when the signal was taken. */
+struct sigcontext
+{
+ __sigset_t sc_mask;
+ unsigned long sc_usp;
+ unsigned long sc_d0;
+ unsigned long sc_d1;
+ unsigned long sc_a0;
+ unsigned long sc_a1;
+ unsigned short sc_sr;
+ unsigned long sc_pc;
+};
--- /dev/null
+/* Copyright (C) 1996 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>
+
+.text
+ENTRY (__sigreturn)
+ addq.l #4, %sp /* Pop the return PC. */
+ DO_CALL (#SYS_ify (sigreturn), 0)
+ /* Do the system call; it never returns. */
+ /* NOTREACHED */
+
+weak_alias (__sigreturn, sigreturn)
--- /dev/null
+/* Copyright (C) 1996 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>
+#include <sys/socketcall.h>
+
+#define P(a, b) P2(a, b)
+#define P2(a, b) a##b
+
+ .text
+ SYSCALL_ERROR_HANDLER
+
+/* 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 the specific function.
+
+ The .S files for the other calls just #define socket and #include this. */
+
+.globl P(__,socket)
+ENTRY (P(__,socket))
+
+ /* Save registers. */
+ move.l %d2, %a0
+
+ move.l #SYS_ify (socketcall), %d0 /* System call number in %d0. */
+
+ /* Use ## so `socket' is a separate token that might be #define'd. */
+ move.l #P (SOCKOP_,socket), %d1 /* Subcode is first arg to syscall. */
+ lea 4(%sp), %a1 /* Address of args is 2nd arg. */
+ move.l %a1, %d2
+
+ /* Do the system call trap. */
+ trap #0
+
+ /* Restore registers. */
+ move.l %a0, %d2
+
+ /* %d0 is < 0 if there was an error. */
+ tst.l %d0
+ jmi syscall_error
+
+ /* Successful; return the syscall's value. */
+ rts
+
+weak_alias (P(__,socket), socket)
--- /dev/null
+/* Copyright (C) 1996 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>
+
+ .text
+ SYSCALL_ERROR_HANDLER
+ENTRY (syscall)
+ move.l (%sp)+, %a0 /* Pop return address. */
+ DO_CALL ((%sp), 5) /* Frob the args and do the system call. */
+ tst.l %d0 /* Check %d0 for error. */
+ jmi error /* Jump to error handler if negative. */
+ jmp (%a0) /* Return to caller. */
+
+error: pea (%a0)
+ jra syscall_error
--- /dev/null
+/* Copyright (C) 1996 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. */
+
+/* Because the Linux version is in fact m68k/ELF and the start.? file
+ for this system (sysdeps/m68k/elf/start.S) is also used by The Hurd
+ and therefore this files must not contain the definition of the
+ `errno' variable (I don't know why, ask Roland), we have to define
+ it somewhere else.
+
+ ...and this place is here. */
+ .bss
+ .globl errno
+ .type errno,@object
+errno: .space 4
+ .size errno,4
+ .globl _errno
+ .type _errno,@object
+_errno = errno /* This name is expected by hj libc.so.5 startup code. */
+ .text
+
+/* The following code is not used at all in the shared library.
+ The PIC system call stubs set errno themselves. */
+
+#ifndef PIC
+
+#include <sysdep.h>
+#define _ERRNO_H
+#include <errnos.h>
+
+.globl errno
+.globl __syscall_error
+
+/* The syscall stubs jump here when they detect an error. */
+
+.globl __syscall_error
+__syscall_error:
+ neg.l %d0
+
+#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. */
+ move.l #EWOULDBLOCK_sys, %d1
+ cmp.l %d0, %d1
+ jne 1f
+ move.l #EAGAIN, %d0
+1:
+#endif
+
+ move.l %d0, errno
+ move.l #-1, %d0
+ /* Copy return value to %a0 for syscalls that are declared to
+ return a pointer. */
+ move.l %d0, %a0
+ rts
+#endif /* PIC */
--- /dev/null
+/* Copyright (C) 1996 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Written by Andreas Schwab, <schwab@issan.informatik.uni-dortmund.de>,
+December 1995.
+
+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. */
+
+/* In the Linux/ELF world, C symbols are asm symbols. */
+#define NO_UNDERSCORES
+
+#include <sysdeps/unix/sysdep.h>
+
+#ifdef ASSEMBLER
+
+#define POUND #
+
+/* Define an entry point visible from C. */
+#define ENTRY(name) \
+ .globl name; \
+ .type name, @function; \
+ .align 4; \
+ name##:
+
+/* 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 __syscall_error
+
+/* Linux uses a negative return value to indicate syscall errors, unlike
+ most Unices, which use the condition codes' carry flag. */
+#define PSEUDO(name, syscall_name, args) \
+ .text; \
+ SYSCALL_ERROR_HANDLER \
+ ENTRY (name) \
+ DO_CALL (POUND SYS_ify (syscall_name), args); \
+ tst.l %d0; \
+ jmi syscall_error;
+
+#ifdef PIC
+/* Store (- %d0) into errno through the GOT. */
+#define SYSCALL_ERROR_HANDLER \
+syscall_error: \
+ move.l (errno@GOTPC.l, %pc), %a0; \
+ neg.l %d0; \
+ move.l %d0, (%a0); \
+ move.l POUND -1, %d0; \
+ /* Copy return value to %a0 for syscalls that are declared to return \
+ a pointer (e.g., mmap). */ \
+ move.l %d0, %a0; \
+ rts;
+#else
+#define SYSCALL_ERROR_HANDLER /* Nothing here; code in sysdep.S is used. */
+#endif
+
+/* Linux takes system call arguments in registers:
+
+ syscall number %d0 call-clobbered
+ arg 1 %d1 call-clobbered
+ arg 2 %d2 call-saved
+ arg 3 %d3 call-saved
+ arg 4 %d4 call-saved
+ arg 5 %d5 call-saved
+
+ The stack layout upon entering the function is:
+
+ 20(%sp) Arg# 5
+ 16(%sp) Arg# 4
+ 12(%sp) Arg# 3
+ 8(%sp) Arg# 2
+ 4(%sp) Arg# 1
+ (%sp) Return address
+
+ (Of course a function with say 3 arguments does not have entries for
+ arguments 4 and 5.)
+
+ Separate move's are faster than movem, but need more space. Since
+ speed is more important, we don't use movem. Since %a0 and %a1 are
+ scratch registers, we can use them for saving as well. */
+
+#define DO_CALL(syscall, args) \
+ move.l syscall, %d0; \
+ DOARGS_##args \
+ trap POUND 0; \
+ UNDOARGS_##args
+
+#define DOARGS_0 /* No arguments to frob. */
+#define UNDOARGS_0 /* No arguments to unfrob. */
+#define _DOARGS_0(n) /* No arguments to frob. */
+
+#define DOARGS_1 _DOARGS_1 (4)
+#define _DOARGS_1(n) move.l n(%sp), %d1; _DOARGS_0 (n)
+#define UNDOARGS_1 UNDOARGS_0
+
+#define DOARGS_2 _DOARGS_2 (8)
+#define _DOARGS_2(n) move.l %d2, %a0; move.l n(%sp), %d2; _DOARGS_1 (n-4)
+#define UNDOARGS_2 UNDOARGS_1; move.l %a0, %d2
+
+#define DOARGS_3 _DOARGS_3 (12)
+#define _DOARGS_3(n) move.l %d3, %a1; move.l n(%sp), %d3; _DOARGS_2 (n-4)
+#define UNDOARGS_3 UNDOARGS_2; move.l %a1, %d3
+
+#define DOARGS_4 _DOARGS_4 (16)
+#define _DOARGS_4(n) move.l %d4, -(%sp); move.l n+4(%sp), %d4; _DOARGS_3 (n)
+#define UNDOARGS_4 UNDOARGS_3; move.l (%sp)+, %d4
+
+#define DOARGS_5 _DOARGS_5 (20)
+#define _DOARGS_5(n) move.l %d5, -(%sp); move.l n+4(%sp), %d5; _DOARGS_4 (n)
+#define UNDOARGS_5 UNDOARGS_4; move.l (%sp)+, %d5
+
+
+#define ret rts
+#if 0 /* Not used by Linux */
+#define r0 %d0
+#define r1 %d1
+#define MOVE(x,y) movel x , y
+#endif
+
+#endif /* ASSEMBLER */
projects / platform / upstream / glibc.git / commitdiff