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+++ Libc/Libc-391.2.9/sys/sigtramp.c
@@ -0,0 +1,222 @@
+/*
+ * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+/*
+ * Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved
+ */
+#import "sigcatch.h"
+#import <sys/types.h>
+#import <signal.h>
+#import <ucontext.h>
+#import <mach/thread_status.h>
+
+/*
+ * sigvec registers _sigtramp as the handler for any signal requiring
+ * user-mode intervention. All _sigtramp does is find the real handler,
+ * calls it, then sigreturn's.
+ *
+ * Note that the kernel saves/restores all of our register state.
+ */
+#if defined(__DYNAMIC__)
+int __in_sigtramp = 0;
+#endif
+
+/* These defn should match the kernel one */
+#define UC_TRAD 1
+#if defined(__ppc__) || defined(__ppc64__)
+#define UC_TRAD64 20
+#define UC_TRAD64_VEC 25
+#define UC_FLAVOR 30
+#define UC_FLAVOR_VEC 35
+#define UC_FLAVOR64 40
+#define UC_FLAVOR64_VEC 45
+#define UC_DUAL 50
+#define UC_DUAL_VEC 55
+
+ /* The following are valid mcontext sizes */
+#define UC_FLAVOR_SIZE ((PPC_THREAD_STATE_COUNT + PPC_EXCEPTION_STATE_COUNT + PPC_FLOAT_STATE_COUNT) * sizeof(int))
+
+#define UC_FLAVOR_VEC_SIZE ((PPC_THREAD_STATE_COUNT + PPC_EXCEPTION_STATE_COUNT + PPC_FLOAT_STATE_COUNT + PPC_VECTOR_STATE_COUNT) * sizeof(int))
+
+#define UC_FLAVOR64_SIZE ((PPC_THREAD_STATE64_COUNT + PPC_EXCEPTION_STATE64_COUNT + PPC_FLOAT_STATE_COUNT) * sizeof(int))
+
+#define UC_FLAVOR64_VEC_SIZE ((PPC_THREAD_STATE64_COUNT + PPC_EXCEPTION_STATE64_COUNT + PPC_FLOAT_STATE_COUNT + PPC_VECTOR_STATE_COUNT) * sizeof(int))
+#endif
+
+#if defined(__ppc__) || defined(__ppc64__)
+/* This routine will be replaced by an assembly soon */
+static int
+restore64_state(mcontext_t mctx, mcontext64_t mctx64, int sigstyle)
+{
+ if (mctx->ss.srr0 != (unsigned int)mctx64->ss.srr0)
+ return(0);
+ if (mctx->ss.srr1 != (unsigned int)mctx64->ss.srr1)
+ return(0);
+ if (mctx->ss.r0 != (unsigned int)mctx64->ss.r0)
+ return(0);
+ if (mctx->ss.r1 != (unsigned int)mctx->ss.r1)
+ return(0);
+ if (mctx->ss.r2 != (unsigned int)mctx->ss.r2)
+ return(0);
+ if (mctx->ss.r3 != (unsigned int)mctx->ss.r3)
+ return(0);
+ if (mctx->ss.r4 != (unsigned int)mctx->ss.r4)
+ return(0);
+ if (mctx->ss.r5 != (unsigned int)mctx->ss.r5)
+ return(0);
+ if (mctx->ss.r6 != (unsigned int)mctx->ss.r6)
+ return(0);
+ if (mctx->ss.r7 != (unsigned int)mctx->ss.r7)
+ return(0);
+ if (mctx->ss.r8 != (unsigned int)mctx->ss.r8)
+ return(0);
+ if (mctx->ss.r9 != (unsigned int)mctx->ss.r9)
+ return(0);
+ if (mctx->ss.r10 != (unsigned int)mctx->ss.r10)
+ return(0);
+ if (mctx->ss.r11 != (unsigned int)mctx->ss.r11)
+ return(0);
+ if (mctx->ss.r12 != (unsigned int)mctx->ss.r12)
+ return(0);
+ if (mctx->ss.r13 != (unsigned int)mctx->ss.r13)
+ return(0);
+ if (mctx->ss.r14 != (unsigned int)mctx->ss.r14)
+ return(0);
+ if (mctx->ss.r15 != (unsigned int)mctx->ss.r15)
+ return(0);
+ if (mctx->ss.r16 != (unsigned int)mctx->ss.r16)
+ return(0);
+ if (mctx->ss.r17 != (unsigned int)mctx->ss.r17)
+ return(0);
+ if (mctx->ss.r18 != (unsigned int)mctx->ss.r18)
+ return(0);
+ if (mctx->ss.r19 != (unsigned int)mctx->ss.r19)
+ return(0);
+ if (mctx->ss.r20 != (unsigned int)mctx->ss.r20)
+ return(0);
+ if (mctx->ss.r21 != (unsigned int)mctx->ss.r21)
+ return(0);
+ if (mctx->ss.r22 != (unsigned int)mctx64->ss.r22)
+ return(0);
+ if (mctx->ss.r23 != (unsigned int)mctx64->ss.r23)
+ return(0);
+ if (mctx->ss.r24 != (unsigned int)mctx64->ss.r24)
+ return(0);
+ if (mctx->ss.r25 != (unsigned int)mctx64->ss.r25)
+ return(0);
+ if (mctx->ss.r26 != (unsigned int)mctx64->ss.r26)
+ return(0);
+ if (mctx->ss.r27 != (unsigned int)mctx64->ss.r27)
+ return(0);
+ if (mctx->ss.r28 != (unsigned int)mctx64->ss.r28)
+ return(0);
+ if (mctx->ss.r29 != (unsigned int)mctx64->ss.r29)
+ return(0);
+ if (mctx->ss.r30 != (unsigned int)mctx64->ss.r30)
+ return(0);
+ if (mctx->ss.r31 != (unsigned int)mctx64->ss.r31)
+ return(0);
+
+ if (mctx->ss.cr != mctx64->ss.cr)
+ return(0);
+ if (mctx->ss.xer != (unsigned int)mctx64->ss.xer)
+ return(0);
+ if (mctx->ss.lr != (unsigned int)mctx64->ss.lr)
+ return(0);
+ if (mctx->ss.ctr != (unsigned int)mctx64->ss.ctr)
+ return(0);
+
+ if (bcmp(&mctx->fs, &mctx64->ss, (PPC_FLOAT_STATE_COUNT * sizeof(int))))
+ return(0);
+ if ((sigstyle == UC_DUAL_VEC) && bcmp(&mctx->vs, &mctx64->vs, (PPC_VECTOR_STATE_COUNT * sizeof(int))))
+ return(0);
+
+ return(1);
+
+}
+
+#endif
+
+void
+_sigtramp(
+ union __sigaction_u __sigaction_u,
+ int sigstyle,
+ int sig,
+ siginfo_t *sinfo,
+ ucontext_t *uctx
+) {
+#if defined(__ppc__) || defined(__ppc64__)
+ int ctxstyle = UC_FLAVOR;
+#endif
+ mcontext_t mctx;
+ mcontext64_t mctx64;
+
+#if defined(__DYNAMIC__)
+ __in_sigtramp++;
+#endif
+#ifdef __i386__
+ if (sigstyle == UC_TRAD)
+ sa_handler(sig);
+#elif defined(__ppc__) || defined(__ppc64__)
+ if ((sigstyle == UC_TRAD) || (sigstyle == UC_TRAD64) || (sigstyle == UC_TRAD64_VEC))
+ sa_handler(sig);
+
+ else
+ sa_sigaction(sig, sinfo, uctx);
+
+ if ((sigstyle == UC_DUAL) || (sigstyle == UC_DUAL_VEC)) {
+ mctx = uctx->uc_mcontext;
+ mctx64 = (mcontext64_t)((char *)(uctx->uc_mcontext) + sizeof(struct mcontext));
+ /* restore 64bit state ? */
+ if (restore64_state(mctx, mctx64, sigstyle)) {
+ uctx->uc_mcontext = (void *)mctx64;
+ if (sigstyle == UC_DUAL) {
+ uctx->uc_mcsize = UC_FLAVOR64_SIZE;
+ ctxstyle = UC_FLAVOR64;
+ } else {
+ uctx->uc_mcsize = UC_FLAVOR64_VEC_SIZE;
+ ctxstyle = UC_FLAVOR64_VEC;
+ }
+ } else {
+ if (sigstyle == UC_DUAL)
+ ctxstyle = UC_FLAVOR;
+ else
+ ctxstyle = UC_FLAVOR_VEC;
+ }
+ } else
+ ctxstyle = sigstyle;
+#endif /* __ppc__ || __ppc64__ */
+
+#if defined(__DYNAMIC__)
+ __in_sigtramp--;
+#endif
+#if defined(__ppc__) || defined(__ppc64__)
+ {
+ /* sigreturn(uctx, ctxstyle); */
+ /* syscall (SYS_SIGRETURN, uctx, ctxstyle); */
+ syscall (184, uctx, ctxstyle);
+ }
+#else
+ sigreturn(uctx);
+#endif /* __ppc__ || __ppc64__ */
+}
+