Linux-2.6.12-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!
diff --git a/arch/um/os-Linux/sys-i386/Makefile b/arch/um/os-Linux/sys-i386/Makefile
new file mode 100644
index 0000000..340ef26
--- /dev/null
+++ b/arch/um/os-Linux/sys-i386/Makefile
@@ -0,0 +1,10 @@
+#
+# Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
+# Licensed under the GPL
+#
+
+obj-$(CONFIG_MODE_SKAS) = registers.o
+
+USER_OBJS := $(obj-y)
+
+include arch/um/scripts/Makefile.rules
diff --git a/arch/um/os-Linux/sys-i386/registers.c b/arch/um/os-Linux/sys-i386/registers.c
new file mode 100644
index 0000000..148645b
--- /dev/null
+++ b/arch/um/os-Linux/sys-i386/registers.c
@@ -0,0 +1,132 @@
+/*
+ * Copyright (C) 2004 PathScale, Inc
+ * Licensed under the GPL
+ */
+
+#include <errno.h>
+#include <string.h>
+#include "sysdep/ptrace_user.h"
+#include "sysdep/ptrace.h"
+#include "uml-config.h"
+#include "skas_ptregs.h"
+#include "registers.h"
+#include "user.h"
+
+/* These are set once at boot time and not changed thereafter */
+
+static unsigned long exec_regs[HOST_FRAME_SIZE];
+static unsigned long exec_fp_regs[HOST_FP_SIZE];
+static unsigned long exec_fpx_regs[HOST_XFP_SIZE];
+static int have_fpx_regs = 1;
+
+void init_thread_registers(union uml_pt_regs *to)
+{
+ memcpy(to->skas.regs, exec_regs, sizeof(to->skas.regs));
+ memcpy(to->skas.fp, exec_fp_regs, sizeof(to->skas.fp));
+ if(have_fpx_regs)
+ memcpy(to->skas.xfp, exec_fpx_regs, sizeof(to->skas.xfp));
+}
+
+/* XXX These need to use [GS]ETFPXREGS and copy_sc_{to,from}_user_skas needs
+ * to pass in a sufficiently large buffer
+ */
+int save_fp_registers(int pid, unsigned long *fp_regs)
+{
+ if(ptrace(PTRACE_GETFPREGS, pid, 0, fp_regs) < 0)
+ return(-errno);
+ return(0);
+}
+
+int restore_fp_registers(int pid, unsigned long *fp_regs)
+{
+ if(ptrace(PTRACE_SETFPREGS, pid, 0, fp_regs) < 0)
+ return(-errno);
+ return(0);
+}
+
+static int move_registers(int pid, int int_op, union uml_pt_regs *regs,
+ int fp_op, unsigned long *fp_regs)
+{
+ if(ptrace(int_op, pid, 0, regs->skas.regs) < 0)
+ return(-errno);
+
+ if(ptrace(fp_op, pid, 0, fp_regs) < 0)
+ return(-errno);
+
+ return(0);
+}
+
+void save_registers(int pid, union uml_pt_regs *regs)
+{
+ unsigned long *fp_regs;
+ int err, fp_op;
+
+ if(have_fpx_regs){
+ fp_op = PTRACE_GETFPXREGS;
+ fp_regs = regs->skas.xfp;
+ }
+ else {
+ fp_op = PTRACE_GETFPREGS;
+ fp_regs = regs->skas.fp;
+ }
+
+ err = move_registers(pid, PTRACE_GETREGS, regs, fp_op, fp_regs);
+ if(err)
+ panic("save_registers - saving registers failed, errno = %d\n",
+ -err);
+}
+
+void restore_registers(int pid, union uml_pt_regs *regs)
+{
+ unsigned long *fp_regs;
+ int err, fp_op;
+
+ if(have_fpx_regs){
+ fp_op = PTRACE_SETFPXREGS;
+ fp_regs = regs->skas.xfp;
+ }
+ else {
+ fp_op = PTRACE_SETFPREGS;
+ fp_regs = regs->skas.fp;
+ }
+
+ err = move_registers(pid, PTRACE_SETREGS, regs, fp_op, fp_regs);
+ if(err)
+ panic("restore_registers - saving registers failed, "
+ "errno = %d\n", -err);
+}
+
+void init_registers(int pid)
+{
+ int err;
+
+ err = ptrace(PTRACE_GETREGS, pid, 0, exec_regs);
+ if(err)
+ panic("check_ptrace : PTRACE_GETREGS failed, errno = %d",
+ err);
+
+ err = ptrace(PTRACE_GETFPXREGS, pid, 0, exec_fpx_regs);
+ if(!err)
+ return;
+
+ have_fpx_regs = 0;
+ if(err != EIO)
+ panic("check_ptrace : PTRACE_GETFPXREGS failed, errno = %d",
+ err);
+
+ err = ptrace(PTRACE_GETFPREGS, pid, 0, exec_fp_regs);
+ if(err)
+ panic("check_ptrace : PTRACE_GETFPREGS failed, errno = %d",
+ err);
+}
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only. This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */