diff options
Diffstat (limited to 'sysdeps/unix/bsd/ultrix4/mips')
| -rw-r--r-- | sysdeps/unix/bsd/ultrix4/mips/Dist | 1 | ||||
| -rw-r--r-- | sysdeps/unix/bsd/ultrix4/mips/Makefile | 3 | ||||
| -rw-r--r-- | sysdeps/unix/bsd/ultrix4/mips/__handler.S | 113 | ||||
| -rw-r--r-- | sysdeps/unix/bsd/ultrix4/mips/sigcontext.h | 60 | ||||
| -rw-r--r-- | sysdeps/unix/bsd/ultrix4/mips/sigtramp.c | 55 | ||||
| -rw-r--r-- | sysdeps/unix/bsd/ultrix4/mips/sigvec.S | 24 | ||||
| -rw-r--r-- | sysdeps/unix/bsd/ultrix4/mips/start.S | 77 | ||||
| -rw-r--r-- | sysdeps/unix/bsd/ultrix4/mips/vfork.S | 33 |
8 files changed, 366 insertions, 0 deletions
diff --git a/sysdeps/unix/bsd/ultrix4/mips/Dist b/sysdeps/unix/bsd/ultrix4/mips/Dist new file mode 100644 index 0000000000..c2e8abb84d --- /dev/null +++ b/sysdeps/unix/bsd/ultrix4/mips/Dist @@ -0,0 +1 @@ +sigtramp.c __handler.S diff --git a/sysdeps/unix/bsd/ultrix4/mips/Makefile b/sysdeps/unix/bsd/ultrix4/mips/Makefile new file mode 100644 index 0000000000..0b71fd9e18 --- /dev/null +++ b/sysdeps/unix/bsd/ultrix4/mips/Makefile @@ -0,0 +1,3 @@ +ifeq ($(subdir),signal) +sysdep_routines := $(sysdep_routines) sigtramp __handler +endif diff --git a/sysdeps/unix/bsd/ultrix4/mips/__handler.S b/sysdeps/unix/bsd/ultrix4/mips/__handler.S new file mode 100644 index 0000000000..3ea697c5a0 --- /dev/null +++ b/sysdeps/unix/bsd/ultrix4/mips/__handler.S @@ -0,0 +1,113 @@ +/* Copyright (C) 1992 Free Software Foundation, Inc. + Contributed by Brendan Kehoe (brendan@zen.org). + Also hacked by Ian Lance Taylor (ian@airs.com). + +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> + +/* This function saves all the registers, calls the + user function, and then executes a sigreturn system call. The + sigreturn call wants the address of a sigcontext structure. This + is all hideously system dependent and, for all intents and + purposes, undocumented. + + When we enter here, a3 holds the user's signal handler. We are + supposed to fill in the context given in a2, and then pass it and + the first two arguments to the user's function. If the user's + function returns, we execute a sigreturn system call. + + The sc_onstack, sc_mask and sc_pc elements of the context are + already set by the kernel. For some reason we don't have to save + the floating point state or the coprocessor state; the kernel may + have saved them for us, or it doesn't use them. */ + +.set noat +ENTRY (__handler) + /* Store zero and the asm temp reg. */ + sw $0, 12(a2) + sw AT, 16(a2) + + /* Put v1 in sc_regs[3]. */ + sw v1, 24(a2) + + /* Save the caller saved registers in sc_regs[8..15]. */ + sw t0, 44(a2) + sw t1, 48(a2) + sw t2, 52(a2) + sw t3, 56(a2) + sw t4, 60(a2) + sw t5, 64(a2) + sw t6, 68(a2) + sw t7, 72(a2) + + /* Save the callee saved registers in sc_regs[16..23]. */ + sw s0, 76(a2) + sw s1, 80(a2) + sw s2, 84(a2) + sw s3, 88(a2) + sw s4, 92(a2) + sw s5, 96(a2) + sw s6, 100(a2) + sw s7, 104(a2) + + /* Save the code generator registers in sc_regs[24] & sc_regs[25]. */ + sw t8, 108(a2) + sw t9, 112(a2) + + /* Save the kernel temp regs in sc_regs[26] & sc_regs[27]. */ + sw k0, 116(a2) + sw k1, 120(a2) + + /* Save the global pointer in sc_regs[28]. */ + sw gp, 124(a2) + + /* ... and also the return address in sc_regs[31]. */ + sw ra, 136(a2) + + /* Note: we don't save the stack pointer in sc_regs[29]; + instead, we use the one that was already there. */ +#if 0 + sw sp, 128(a2) +#endif + + /* Save the floating pointer in sc_regs[30]. */ + sw $fp, 132(a2) + + /* Save the mul/div stuff in sc_mdlo and sc_mdhi. */ + mflo t0 + sw t0, 140(a2) + mfhi t0 + sw t0, 144(a2) + + /* Move the stack up four. This will save the context. */ + addu sp, sp, -32 + sw a2, 16(sp) + + /* Call their handler with the signal, code, and context; note + this will clobber the context. */ + .set noreorder + jal ra, a3 + nop + .set reorder + + /* When we come back, restore the context and pass it right + on into sigreturn(). */ + lw a0, 16(sp) + + /* Do a sigreturn syscall; this doesn't return. */ + la v0, __sigreturn + jal ra, v0 diff --git a/sysdeps/unix/bsd/ultrix4/mips/sigcontext.h b/sysdeps/unix/bsd/ultrix4/mips/sigcontext.h new file mode 100644 index 0000000000..4bddcf2f4b --- /dev/null +++ b/sysdeps/unix/bsd/ultrix4/mips/sigcontext.h @@ -0,0 +1,60 @@ +/* Copyright (C) 1992, 1994 Free Software Foundation, Inc. + Contributed by Brendan Kehoe (brendan@zen.org). + +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. */ + +/* Note that ANY change to this instantly implies a change to __handler.S. */ + +struct sigcontext + { + /* Nonzero if running on signal stack. */ + int sc_onstack; + + /* Signal mask to restore. */ + __sigset_t sc_mask; + + /* Program counter when the signal hit. */ + __ptr_t sc_pc; + + /* Registers 0 through 31. */ + int sc_regs[32]; + + /* mul/div low and hi; these aren't part of a jmp_buf, but are part of the + sigcontext and are referenced from the signal trampoline code. */ + int sc_mdlo; + int sc_mdhi; + + /* Flag to see if the FP's been used. */ + int sc_ownedfp; + + /* Floating point registers 0 to 31. */ + int sc_fpregs[32]; + /* Control & status register for FP. */ + int sc_fpc_csr; + + /* Exception instruction register for FP. */ + int sc_fpc_eir; + + /* The coprocessor's cause register. */ + int sc_cause; + + /* CPU bad virtual address. */ + __ptr_t sc_badvaddr; + + /* CPU board bad physical address. */ + __ptr_t sc_badpaddr; + }; + diff --git a/sysdeps/unix/bsd/ultrix4/mips/sigtramp.c b/sysdeps/unix/bsd/ultrix4/mips/sigtramp.c new file mode 100644 index 0000000000..1bb208dd8b --- /dev/null +++ b/sysdeps/unix/bsd/ultrix4/mips/sigtramp.c @@ -0,0 +1,55 @@ +/* Copyright (C) 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. */ + +/* The sigvec system call on MIPS Ultrix takes an additional + parameter, which is the address that is actually called when the + signal occurs. + + When a signal occurs, we arrange for the kernel to call __handler. + That will save the frame and stack pointers into the context, and + then jump to this routine. See __handler.S. + + This code is based on sysdeps/unix/bsd/sun4/sigtramp.c, but it's + different because since we get passed the user signal handler we + don't actually need a trampoline. */ + +#include <ansidecl.h> +#include <signal.h> +#include <stddef.h> +#include <errno.h> + +/* The user's signal handler is called with three arguments. */ +typedef void (*handler_type) (int sig, int code, struct sigcontext *); + +/* Defined in __raw_sigvec.S. */ +extern int EXFUN(__raw_sigvec, (int sig, CONST struct sigvec *vec, + struct sigvec *ovec, + void (*)(int sig, int code, + struct sigcontext *, + handler_type))); + +extern void EXFUN(__handler, (int sig, int code, + struct sigcontext *, + handler_type)); + +int +DEFUN(__sigvec, (sig, vec, ovec), + int sig AND CONST struct sigvec *vec AND struct sigvec *ovec) +{ + return __raw_sigvec (sig, vec, ovec, __handler); +} diff --git a/sysdeps/unix/bsd/ultrix4/mips/sigvec.S b/sysdeps/unix/bsd/ultrix4/mips/sigvec.S new file mode 100644 index 0000000000..20a5dd1c49 --- /dev/null +++ b/sysdeps/unix/bsd/ultrix4/mips/sigvec.S @@ -0,0 +1,24 @@ +/* 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> + +/* __sigvec is defined by sigtramp.c. */ + +PSEUDO (__raw_sigvec, sigvec, 3) + ret diff --git a/sysdeps/unix/bsd/ultrix4/mips/start.S b/sysdeps/unix/bsd/ultrix4/mips/start.S new file mode 100644 index 0000000000..ec0f9d833d --- /dev/null +++ b/sysdeps/unix/bsd/ultrix4/mips/start.S @@ -0,0 +1,77 @@ +/* Copyright (C) 1993, 1995 Free Software Foundation, Inc. + Contributed by Brendan Kehoe (brendan@zen.org). + +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> + +#ifndef HAVE_WEAK_SYMBOLS +#define __environ environ +#else +weak_alias (__environ, environ) +#endif + +.comm __environ, 4 +.comm errno, 4 + +ENTRY(__start) + .set noreorder + + /* The first thing on the stack is argc. */ + lw s0, 0(sp) + nop + + /* Set up the global pointer. */ + la gp, _gp + + /* Then set up argv. */ + addiu s1, sp, 4 + + /* To compute where envp is, first we have to jump ahead four + bytes from what argv was. This will bring us ahead, so we don't + need to compute the NULL at the end of argv later. */ + addiu v1, s1, 4 + + /* Now, compute the space to skip given the number of arguments + we've got. We do this by multiplying argc by 4. */ + sll v0, s0, 2 + + /* Now, add (argv+4) with the space to skip...that's envp. */ + addu s2, v1, v0 + + /* __environ = envp; */ + sw s2, __environ + + addiu sp, sp, -24 + + /* __libc_init (argc, argv, envp); */ + move a0, s0 + move a1, s1 + jal __libc_init + move a2, s2 + + /* errno = 0; */ + sw zero, errno + + /* exit (main (argc, argv, envp)); */ + move a0, s0 + move a1, s1 + jal main + move a2, s2 + + /* Make the value returned by main be the argument to exit. */ + jal exit + move a0, v0 diff --git a/sysdeps/unix/bsd/ultrix4/mips/vfork.S b/sysdeps/unix/bsd/ultrix4/mips/vfork.S new file mode 100644 index 0000000000..37f6d8016d --- /dev/null +++ b/sysdeps/unix/bsd/ultrix4/mips/vfork.S @@ -0,0 +1,33 @@ +/* Copyright (C) 1992, 1995 Free Software Foundation, Inc. + Contributed by Brendan Kehoe (brendan@zen.org). + +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> + +#ifndef SYS_vfork +#define SYS_vfork 66 +#endif + +SYSCALL__ (vfork, 0) + beq v1, zero, parent /* Branch if parent. */ + nop + move v0, zero +parent: + ret + nop + +weak_alias (__vfork, vfork) |