Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 156 insertions, 0 deletions

diff --git a/arch/ia64/ia32/ia32_traps.c b/arch/ia64/ia32/ia32_traps.c
new file mode 100644
index 000000000000..e486042672f1
--- /dev/null
+++ b/arch/ia64/ia32/ia32_traps.c
@@ -0,0 +1,156 @@
+/*
+ * IA-32 exception handlers
+ *
+ * Copyright (C) 2000 Asit K. Mallick <asit.k.mallick@intel.com>
+ * Copyright (C) 2001-2002 Hewlett-Packard Co
+ *	David Mosberger-Tang <davidm@hpl.hp.com>
+ *
+ * 06/16/00	A. Mallick	added siginfo for most cases (close to IA32)
+ * 09/29/00	D. Mosberger	added ia32_intercept()
+ */
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+
+#include "ia32priv.h"
+
+#include <asm/intrinsics.h>
+#include <asm/ptrace.h>
+
+int
+ia32_intercept (struct pt_regs *regs, unsigned long isr)
+{
+	switch ((isr >> 16) & 0xff) {
+	      case 0:	/* Instruction intercept fault */
+	      case 4:	/* Locked Data reference fault */
+	      case 1:	/* Gate intercept trap */
+		return -1;
+
+	      case 2:	/* System flag trap */
+		if (((isr >> 14) & 0x3) >= 2) {
+			/* MOV SS, POP SS instructions */
+			ia64_psr(regs)->id = 1;
+			return 0;
+		} else
+			return -1;
+	}
+	return -1;
+}
+
+int
+ia32_exception (struct pt_regs *regs, unsigned long isr)
+{
+	struct siginfo siginfo;
+
+	/* initialize these fields to avoid leaking kernel bits to user space: */
+	siginfo.si_errno = 0;
+	siginfo.si_flags = 0;
+	siginfo.si_isr = 0;
+	siginfo.si_imm = 0;
+	switch ((isr >> 16) & 0xff) {
+	      case 1:
+	      case 2:
+		siginfo.si_signo = SIGTRAP;
+		if (isr == 0)
+			siginfo.si_code = TRAP_TRACE;
+		else if (isr & 0x4)
+			siginfo.si_code = TRAP_BRANCH;
+		else
+			siginfo.si_code = TRAP_BRKPT;
+		break;
+
+	      case 3:
+		siginfo.si_signo = SIGTRAP;
+		siginfo.si_code = TRAP_BRKPT;
+		break;
+
+	      case 0:	/* Divide fault */
+		siginfo.si_signo = SIGFPE;
+		siginfo.si_code = FPE_INTDIV;
+		break;
+
+	      case 4:	/* Overflow */
+	      case 5:	/* Bounds fault */
+		siginfo.si_signo = SIGFPE;
+		siginfo.si_code = 0;
+		break;
+
+	      case 6:	/* Invalid Op-code */
+		siginfo.si_signo = SIGILL;
+		siginfo.si_code = ILL_ILLOPN;
+		break;
+
+	      case 7:	/* FP DNA */
+	      case 8:	/* Double Fault */
+	      case 9:	/* Invalid TSS */
+	      case 11:	/* Segment not present */
+	      case 12:	/* Stack fault */
+	      case 13:	/* General Protection Fault */
+		siginfo.si_signo = SIGSEGV;
+		siginfo.si_code = 0;
+		break;
+
+	      case 16:	/* Pending FP error */
+		{
+			unsigned long fsr, fcr;
+
+			fsr = ia64_getreg(_IA64_REG_AR_FSR);
+			fcr = ia64_getreg(_IA64_REG_AR_FCR);
+
+			siginfo.si_signo = SIGFPE;
+			/*
+			 * (~cwd & swd) will mask out exceptions that are not set to unmasked
+			 * status.  0x3f is the exception bits in these regs, 0x200 is the
+			 * C1 reg you need in case of a stack fault, 0x040 is the stack
+			 * fault bit.  We should only be taking one exception at a time,
+			 * so if this combination doesn't produce any single exception,
+			 * then we have a bad program that isn't synchronizing its FPU usage
+			 * and it will suffer the consequences since we won't be able to
+			 * fully reproduce the context of the exception
+			 */
+			siginfo.si_isr = isr;
+			siginfo.si_flags = __ISR_VALID;
+			switch(((~fcr) & (fsr & 0x3f)) | (fsr & 0x240)) {
+				case 0x000:
+				default:
+					siginfo.si_code = 0;
+					break;
+				case 0x001: /* Invalid Op */
+				case 0x040: /* Stack Fault */
+				case 0x240: /* Stack Fault | Direction */
+					siginfo.si_code = FPE_FLTINV;
+					break;
+				case 0x002: /* Denormalize */
+				case 0x010: /* Underflow */
+					siginfo.si_code = FPE_FLTUND;
+					break;
+				case 0x004: /* Zero Divide */
+					siginfo.si_code = FPE_FLTDIV;
+					break;
+				case 0x008: /* Overflow */
+					siginfo.si_code = FPE_FLTOVF;
+					break;
+				case 0x020: /* Precision */
+					siginfo.si_code = FPE_FLTRES;
+					break;
+			}
+
+			break;
+		}
+
+	      case 17:	/* Alignment check */
+		siginfo.si_signo = SIGSEGV;
+		siginfo.si_code = BUS_ADRALN;
+		break;
+
+	      case 19:	/* SSE Numeric error */
+		siginfo.si_signo = SIGFPE;
+		siginfo.si_code = 0;
+		break;
+
+	      default:
+		return -1;
+	}
+	force_sig_info(siginfo.si_signo, &siginfo, current);
+	return 0;
+}