Applied the sigcontext changes in the skas code.

arch/um/include/sigcontext.h

@@ -9,8 +9,6 @@
 #include "sysdep/sigcontext.h"
 
 extern int sc_size(void *data);
-extern int copy_sc_to_user(void *to_ptr, void *from_ptr, void *data);
-extern int copy_sc_from_user(void *to_ptr, void *from_ptr, void *data);
 extern void sc_to_sc(void *to_ptr, void *from_ptr);
 
 #endif

arch/um/kernel/frame_kern.c

@@ -9,6 +9,8 @@
 #include "frame_kern.h"
 #include "sigcontext.h"
 #include "sysdep/ptrace.h"
+#include "choose-mode.h"
+#include "mode.h"
 
 static int copy_restorer(void (*restorer)(void), unsigned long start, 
 			 unsigned long sr_index, int sr_relative)
@@ -25,6 +27,15 @@ static int copy_restorer(void (*restorer)(void), unsigned long start,
 			    sizeof(restorer)));
 }
 
+static int copy_sc_to_user(void *to, struct pt_regs *from)
+{
+ 	return(CHOOSE_MODE(copy_sc_to_user_tt(to, from->regs.mode.tt, 
+ 					      &signal_frame_sc_sr.arch),
+ 			   copy_sc_to_user_skas(to, &from->regs,
+ 						current->thread.cr2,
+ 						current->thread.err)));
+}
+
 int setup_signal_stack_si(unsigned long stack_top, int sig, 
 			  unsigned long handler, void (*restorer)(void), 
 			  struct pt_regs *regs, siginfo_t *info, 
@@ -43,8 +54,7 @@ int setup_signal_stack_si(unsigned long stack_top, int sig,
 	if(restorer == NULL)
 		panic("setup_signal_stack_si - no restorer");
 
-	if(copy_sc_to_user((void *) sc, regs->regs.mode.tt, 
-			   &signal_frame_sc.arch) ||
+	if(copy_sc_to_user((void *) sc, regs) ||
 	   copy_to_user((void *) start, signal_frame_si.common.data,
 			signal_frame_si.common.len) ||
 	   copy_to_user((void *) (start + signal_frame_si.common.sig_index), 
@@ -86,8 +96,7 @@ int setup_signal_stack_sc(unsigned long stack_top, int sig,
 	if(copy_to_user((void *) start, frame->data, frame->len) ||
 	   copy_to_user((void *) (start + frame->sig_index), &sig, 
 			sizeof(sig)) ||
-	   copy_sc_to_user(user_sc, regs->regs.mode.tt, 
-			   &signal_frame_sc.arch) ||
+	   copy_sc_to_user(user_sc, regs) ||
 	   copy_to_user(sc_sigmask(user_sc), mask, sizeof(mask->sig[0])) ||
 	   copy_to_user((void *) sigs, &mask->sig[1], sig_size) ||
 	   copy_restorer(restorer, start, frame->sr_index, frame->sr_relative))

arch/um/kernel/signal_kern.c

@@ -23,6 +23,7 @@
 #include "kern.h"
 #include "frame_kern.h"
 #include "sigcontext.h"
+#include "mode.h"
 
 EXPORT_SYMBOL(block_signals);
 EXPORT_SYMBOL(unblock_signals);
@@ -171,7 +172,7 @@ static int kern_do_signal(struct pt_regs *regs, sigset_t *oldset, int error)
 	 */
 	if((current->ptrace & PT_DTRACE) && 
 	   is_syscall(PT_REGS_IP(&current->thread.regs)))
-		current->thread.mode.tt.singlestep_syscall = 1;
+ 		(void) CHOOSE_MODE(current->thread.mode.tt.singlestep_syscall = 1, 0);
 	return(0);
 }
 
@@ -228,6 +229,16 @@ int sys_rt_sigsuspend(sigset_t *unewset, size_t sigsetsize)
 	}
 }
 
+static int copy_sc_from_user(struct pt_regs *to, void *from)
+{
+	int ret;
+
+	ret = CHOOSE_MODE(copy_sc_from_user_tt(to->regs.mode.tt, from, 
+					       &signal_frame_sc.arch),
+			  copy_sc_from_user_skas(&to->regs, from));
+	return(ret);
+}
+
 int sys_sigreturn(struct pt_regs regs)
 {
 	void *sc = sp_to_sc(PT_REGS_SP(&regs));
@@ -241,8 +252,7 @@ int sys_sigreturn(struct pt_regs regs)
 	sigdelsetmask(&current->blocked, ~_BLOCKABLE);
 	recalc_sigpending();
 	spin_unlock_irq(&current->sig->siglock);
-	copy_sc_from_user(current->thread.regs.regs.mode.tt, sc,
-			  &signal_frame_sc.arch);
+	copy_sc_from_user(current->thread.regs, sc);
 	return(PT_REGS_SYSCALL_RET(&current->thread.regs));
 }
 
@@ -257,8 +267,7 @@ int sys_rt_sigreturn(struct pt_regs regs)
 	sigdelsetmask(&current->blocked, ~_BLOCKABLE);
 	recalc_sigpending();
 	spin_unlock_irq(&current->sig->siglock);
-	copy_sc_from_user(current->thread.regs.regs.mode.tt, sc,
-			  &signal_frame_sc.arch);
+	copy_sc_from_user(current->thread.regs, sc);
 	return(PT_REGS_SYSCALL_RET(&current->thread.regs));
 }
 

arch/um/kernel/skas/Makefile

@@ -3,10 +3,10 @@
 # Licensed under the GPL
 #
 
-obj-y = exec_kern.o exec_user.o mem_user.o mmu.o process.o process_kern.o \
-	syscall_user.o trap_user.o
+subdir-y = sys-$(SUBARCH)/
 
-obj-y += $(join $(subdir-y),$(subdir-y:%=/%.o))
+obj-y = exec_kern.o exec_user.o mem_user.o mmu.o process.o process_kern.o \
+	syscall_user.o trap_user.o $(subdir-y)
 
 USER_OBJS = $(filter %_user.o,$(obj-y)) process.o time.o
 USER_OBJS := $(foreach file,$(USER_OBJS),$(obj)/$(file))

arch/um/kernel/skas/sys-i386/Makefile

+# 
+# Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+# Licensed under the GPL
+#
+
+O_TARGET = sys-i386.o
+
+obj-y = sigcontext.o
+
+USER_OBJS = sigcontext.o
+
+include $(TOPDIR)/Rules.make
+
+$(USER_OBJS) : %.o: %.c
+	$(CC) $(CFLAGS_$@) $(USER_CFLAGS) -c -o $@ $<
+
+clean :

arch/um/kernel/skas/sys-i386/sigcontext.c

+/* 
+ * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#include <errno.h>
+#include <asm/sigcontext.h>
+#include <sys/ptrace.h>
+#include <linux/ptrace.h>
+#include "sysdep/ptrace.h"
+#include "sysdep/ptrace_user.h"
+#include "kern_util.h"
+#include "user.h"
+#include "sigcontext.h"
+
+extern int userspace_pid;
+
+int copy_sc_from_user_skas(struct uml_pt_regs *regs, void *from_ptr)
+{
+  	struct sigcontext sc, *from = from_ptr;
+	unsigned long fpregs[FP_FRAME_SIZE];
+	int err;
+
+	err = copy_from_user_proc(&sc, from, sizeof(sc));
+	err |= copy_from_user_proc(fpregs, sc.fpstate, sizeof(fpregs));
+	if(err)
+		return(err);
+
+	regs->mode.skas.regs[GS] = sc.gs;
+	regs->mode.skas.regs[FS] = sc.fs;
+	regs->mode.skas.regs[ES] = sc.es;
+	regs->mode.skas.regs[DS] = sc.ds;
+	regs->mode.skas.regs[EDI] = sc.edi;
+	regs->mode.skas.regs[ESI] = sc.esi;
+	regs->mode.skas.regs[EBP] = sc.ebp;
+	regs->mode.skas.regs[UESP] = sc.esp;
+	regs->mode.skas.regs[EBX] = sc.ebx;
+	regs->mode.skas.regs[EDX] = sc.edx;
+	regs->mode.skas.regs[ECX] = sc.ecx;
+	regs->mode.skas.regs[EAX] = sc.eax;
+	regs->mode.skas.regs[EIP] = sc.eip;
+	regs->mode.skas.regs[CS] = sc.cs;
+	regs->mode.skas.regs[EFL] = sc.eflags;
+	regs->mode.skas.regs[UESP] = sc.esp_at_signal;
+	regs->mode.skas.regs[SS] = sc.ss;
+	regs->mode.skas.fault_addr = sc.cr2;
+	regs->mode.skas.fault_type = FAULT_WRITE(sc.err);
+	regs->mode.skas.trap_type = sc.trapno;
+
+	err = ptrace(PTRACE_SETFPREGS, userspace_pid, 0, fpregs);
+	if(err < 0){
+	  	printk("copy_sc_to_user - PTRACE_SETFPREGS failed, "
+		       "errno = %d\n", errno);
+		return(1);
+	}
+
+	return(0);
+}
+
+int copy_sc_to_user_skas(void *to_ptr, struct uml_pt_regs *regs, 
+			 unsigned long fault_addr, int fault_type)
+{
+  	struct sigcontext sc, *to = to_ptr;
+	struct _fpstate *to_fp;
+	unsigned long fpregs[FP_FRAME_SIZE];
+	int err;
+
+	sc.gs = regs->mode.skas.regs[GS];
+	sc.fs = regs->mode.skas.regs[FS];
+	sc.es = regs->mode.skas.regs[ES];
+	sc.ds = regs->mode.skas.regs[DS];
+	sc.edi = regs->mode.skas.regs[EDI];
+	sc.esi = regs->mode.skas.regs[ESI];
+	sc.ebp = regs->mode.skas.regs[EBP];
+	sc.esp = regs->mode.skas.regs[UESP];
+	sc.ebx = regs->mode.skas.regs[EBX];
+	sc.edx = regs->mode.skas.regs[EDX];
+	sc.ecx = regs->mode.skas.regs[ECX];
+	sc.eax = regs->mode.skas.regs[EAX];
+	sc.eip = regs->mode.skas.regs[EIP];
+	sc.cs = regs->mode.skas.regs[CS];
+	sc.eflags = regs->mode.skas.regs[EFL];
+	sc.esp_at_signal = regs->mode.skas.regs[UESP];
+	sc.ss = regs->mode.skas.regs[SS];
+	sc.cr2 = fault_addr;
+	sc.err = TO_SC_ERR(fault_type);
+	sc.trapno = regs->mode.skas.trap_type;
+
+	err = ptrace(PTRACE_GETFPREGS, userspace_pid, 0, fpregs);
+	if(err < 0){
+	  	printk("copy_sc_to_user - PTRACE_GETFPREGS failed, "
+		       "errno = %d\n", errno);
+		return(1);
+	}
+	to_fp = (struct _fpstate *)((unsigned long) to + sizeof(*to));
+	sc.fpstate = to_fp;
+
+	if(err)
+	  	return(err);
+
+	return(copy_to_user_proc(to, &sc, sizeof(sc)) ||
+	       copy_to_user_proc(to_fp, fpregs, sizeof(fpregs)));
+}
+
+/*
+ * 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:
+ */

arch/um/kernel/tt/Makefile

@@ -3,10 +3,13 @@
 # Licensed under the GPL
 #
 
+subdir-y = sys-$(SUBARCH)/
+
+subdir-$(CONFIG_PT_PROXY) += ptproxy/
+
 obj-y = exec_kern.o exec_user.o gdb.o gdb_kern.o mem.o process_kern.o \
-	syscall_user.o tracer.o uaccess_user.o
+	syscall_user.o tracer.o uaccess_user.o $(subdir-y)
 
-obj-$(CONFIG_PT_PROXY) += ptproxy/
 
 USER_OBJS := $(filter %_user.o,$(obj-y)) gdb.o tracer.o
 USER_OBJS := $(foreach file,$(USER_OBJS),$(obj)/$(file))

arch/um/kernel/tt/sys-i386/Makefile

+# 
+# Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+# Licensed under the GPL
+#
+
+O_TARGET = sys-i386.o
+
+obj-y = sigcontext.o
+
+USER_OBJS = sigcontext.o
+
+include $(TOPDIR)/Rules.make
+
+$(USER_OBJS) : %.o: %.c
+	$(CC) $(CFLAGS_$@) $(USER_CFLAGS) -c -o $@ $<
+
+clean :

arch/um/kernel/tt/sys-i386/sigcontext.c

+/* 
+ * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#include <stdlib.h>
+#include <asm/sigcontext.h>
+#include "kern_util.h"
+#include "sysdep/frame.h"
+
+int copy_sc_from_user_tt(void *to_ptr, void *from_ptr, void *data)
+{
+	struct arch_frame_data *arch = data;
+	struct sigcontext *to = to_ptr, *from = from_ptr;
+	struct _fpstate *to_fp, *from_fp;
+	unsigned long sigs;
+	int err;
+
+	to_fp = to->fpstate;
+	from_fp = from->fpstate;
+	sigs = to->oldmask;
+	err = copy_from_user_proc(to, from, sizeof(*to));
+	to->oldmask = sigs;
+	if(to_fp != NULL){
+		err |= copy_from_user_proc(&to->fpstate, &to_fp,
+					   sizeof(to->fpstate));
+		err |= copy_from_user_proc(to_fp, from_fp, arch->fpstate_size);
+	}
+	return(err);
+}
+
+int copy_sc_to_user_tt(void *to_ptr, void *from_ptr, void *data)
+{
+	struct arch_frame_data *arch = data;
+	struct sigcontext *to = to_ptr, *from = from_ptr;
+	struct _fpstate *to_fp, *from_fp;
+	int err;
+
+	to_fp = (struct _fpstate *)((unsigned long) to + sizeof(*to));
+	from_fp = from->fpstate;
+	err = copy_to_user_proc(to, from, sizeof(*to));
+	if(from_fp != NULL){
+		err |= copy_to_user_proc(&to->fpstate, &to_fp,
+					 sizeof(to->fpstate));
+		err |= copy_to_user_proc(to_fp, from_fp, arch->fpstate_size);
+	}
+	return(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:
+ */

arch/um/sys-i386/sigcontext.c

@@ -18,45 +18,6 @@ int sc_size(void *data)
 	return(sizeof(struct sigcontext) + arch->fpstate_size);
 }
 
-int copy_sc_to_user(void *to_ptr, void *from_ptr, void *data)
-{
-	struct arch_frame_data *arch = data;
-	struct sigcontext *to = to_ptr, *from = from_ptr;
-	struct _fpstate *to_fp, *from_fp;
-	int err;
-
-	to_fp = (struct _fpstate *)((unsigned long) to + sizeof(*to));
-	from_fp = from->fpstate;
-	err = copy_to_user_proc(to, from, sizeof(*to));
-	if(from_fp != NULL){
-		err |= copy_to_user_proc(&to->fpstate, &to_fp,
-					 sizeof(to->fpstate));
-		err |= copy_to_user_proc(to_fp, from_fp, arch->fpstate_size);
-	}
-	return(err);
-}
-
-int copy_sc_from_user(void *to_ptr, void *from_ptr, void *data)
-{
-	struct arch_frame_data *arch = data;
-	struct sigcontext *to = to_ptr, *from = from_ptr;
-	struct _fpstate *to_fp, *from_fp;
-	unsigned long sigs;
-	int err;
-
-	to_fp = to->fpstate;
-	from_fp = from->fpstate;
-	sigs = to->oldmask;
-	err = copy_from_user_proc(to, from, sizeof(*to));
-	to->oldmask = sigs;
-	if(to_fp != NULL){
-		err |= copy_from_user_proc(&to->fpstate, &to_fp,
-					   sizeof(to->fpstate));
-		err |= copy_from_user_proc(to_fp, from_fp, arch->fpstate_size);
-	}
-	return(err);
-}
-
 void sc_to_sc(void *to_ptr, void *from_ptr)
 {
 	struct sigcontext *to = to_ptr, *from = from_ptr;