Merge branch 'master'

7 files changed, 90 insertions, 143 deletions

diff --git a/arch/um/sys-x86_64/Makefile b/arch/um/sys-x86_64/Makefile
index f0ab574d1e9..06c3633457a 100644
--- a/arch/um/sys-x86_64/Makefile
+++ b/arch/um/sys-x86_64/Makefile
@@ -29,6 +29,4 @@ module.c-dir = kernel
 
 $(obj)/stub_segv.o: _c_flags = $(call unprofile,$(CFLAGS))
 
-subdir- := util
-
 include arch/um/scripts/Makefile.unmap
diff --git a/arch/um/sys-x86_64/kernel-offsets.c b/arch/um/sys-x86_64/kernel-offsets.c
index 998541eade4..bfcb104b846 100644
--- a/arch/um/sys-x86_64/kernel-offsets.c
+++ b/arch/um/sys-x86_64/kernel-offsets.c
@@ -19,7 +19,7 @@
 void foo(void)
 {
 #ifdef CONFIG_MODE_TT
-	OFFSET(TASK_EXTERN_PID, task_struct, thread.mode.tt.extern_pid);
+	OFFSET(HOST_TASK_EXTERN_PID, task_struct, thread.mode.tt.extern_pid);
 #endif
 #include <common-offsets.h>
 }
diff --git a/arch/um/sys-x86_64/stub_segv.c b/arch/um/sys-x86_64/stub_segv.c
index 65a131b362b..d1e53bdf2e8 100644
--- a/arch/um/sys-x86_64/stub_segv.c
+++ b/arch/um/sys-x86_64/stub_segv.c
@@ -10,6 +10,22 @@
 #include "uml-config.h"
 #include "sysdep/sigcontext.h"
 #include "sysdep/faultinfo.h"
+#include <stddef.h>
+
+/* Copied from sys-x86_64/signal.c - Can't find an equivalent definition
+ * in the libc headers anywhere.
+ */
+struct rt_sigframe
+{
+	char *pretcode;
+	struct ucontext uc;
+	struct siginfo info;
+};
+
+/* Copied here from <linux/kernel.h> - we're userspace. */
+#define container_of(ptr, type, member) ({                   \
+	const typeof( ((type *)0)->member ) *__mptr = (ptr); \
+	(type *)( (char *)__mptr - offsetof(type,member) );})
 
 void __attribute__ ((__section__ (".__syscall_stub")))
 stub_segv_handler(int sig)
@@ -17,16 +33,19 @@ stub_segv_handler(int sig)
 	struct ucontext *uc;
 
 	__asm__("movq %%rdx, %0" : "=g" (uc) :);
-        GET_FAULTINFO_FROM_SC(*((struct faultinfo *) UML_CONFIG_STUB_DATA),
-                              &uc->uc_mcontext);
+	GET_FAULTINFO_FROM_SC(*((struct faultinfo *) UML_CONFIG_STUB_DATA),
+			      &uc->uc_mcontext);
 
-	__asm__("movq %0, %%rax ; syscall": : "g" (__NR_getpid));
+	__asm__("movq %0, %%rax ; syscall": : "g" (__NR_getpid));	
 	__asm__("movq %%rax, %%rdi ; movq %0, %%rax ; movq %1, %%rsi ;"
-		"syscall": : "g" (__NR_kill), "g" (SIGUSR1));
-	/* Two popqs to restore the stack to the state just before entering
-	 * the handler, one pops the return address, the other pops the frame
-	 * pointer.
+		"syscall": : "g" (__NR_kill), "g" (SIGUSR1) : 
+		"%rdi", "%rax", "%rsi");
+	/* sys_sigreturn expects that the stack pointer will be 8 bytes into
+	 * the signal frame.  So, we use the ucontext pointer, which we know
+	 * already, to get the signal frame pointer, and add 8 to that.
 	 */
-	__asm__("popq %%rax ; popq %%rax ; movq %0, %%rax ; syscall" : : "g"
-		(__NR_rt_sigreturn));
+	__asm__("movq %0, %%rsp": : 
+		"g" ((unsigned long) container_of(uc, struct rt_sigframe, 
+						  uc) + 8));
+	__asm__("movq %0, %%rax ; syscall" : : "g" (__NR_rt_sigreturn));
 }
diff --git a/arch/um/sys-x86_64/user-offsets.c b/arch/um/sys-x86_64/user-offsets.c
index 513d17ceafd..5a585bfbb8c 100644
--- a/arch/um/sys-x86_64/user-offsets.c
+++ b/arch/um/sys-x86_64/user-offsets.c
@@ -16,71 +16,76 @@ typedef __u32 u32;
 #define DEFINE(sym, val) \
         asm volatile("\n->" #sym " %0 " #val : : "i" (val))
 
+#define DEFINE_LONGS(sym, val) \
+        asm volatile("\n->" #sym " %0 " #val : : "i" (val/sizeof(unsigned long)))
+
 #define OFFSET(sym, str, mem) \
 	DEFINE(sym, offsetof(struct str, mem));
 
 void foo(void)
 {
-	OFFSET(SC_RBX, sigcontext, rbx);
-	OFFSET(SC_RCX, sigcontext, rcx);
-	OFFSET(SC_RDX, sigcontext, rdx);
-	OFFSET(SC_RSI, sigcontext, rsi);
-	OFFSET(SC_RDI, sigcontext, rdi);
-	OFFSET(SC_RBP, sigcontext, rbp);
-	OFFSET(SC_RAX, sigcontext, rax);
-	OFFSET(SC_R8, sigcontext, r8);
-	OFFSET(SC_R9, sigcontext, r9);
-	OFFSET(SC_R10, sigcontext, r10);
-	OFFSET(SC_R11, sigcontext, r11);
-	OFFSET(SC_R12, sigcontext, r12);
-	OFFSET(SC_R13, sigcontext, r13);
-	OFFSET(SC_R14, sigcontext, r14);
-	OFFSET(SC_R15, sigcontext, r15);
-	OFFSET(SC_IP, sigcontext, rip);
-	OFFSET(SC_SP, sigcontext, rsp);
-	OFFSET(SC_CR2, sigcontext, cr2);
-	OFFSET(SC_ERR, sigcontext, err);
-	OFFSET(SC_TRAPNO, sigcontext, trapno);
-	OFFSET(SC_CS, sigcontext, cs);
-	OFFSET(SC_FS, sigcontext, fs);
-	OFFSET(SC_GS, sigcontext, gs);
-	OFFSET(SC_EFLAGS, sigcontext, eflags);
-	OFFSET(SC_SIGMASK, sigcontext, oldmask);
+	OFFSET(HOST_SC_RBX, sigcontext, rbx);
+	OFFSET(HOST_SC_RCX, sigcontext, rcx);
+	OFFSET(HOST_SC_RDX, sigcontext, rdx);
+	OFFSET(HOST_SC_RSI, sigcontext, rsi);
+	OFFSET(HOST_SC_RDI, sigcontext, rdi);
+	OFFSET(HOST_SC_RBP, sigcontext, rbp);
+	OFFSET(HOST_SC_RAX, sigcontext, rax);
+	OFFSET(HOST_SC_R8, sigcontext, r8);
+	OFFSET(HOST_SC_R9, sigcontext, r9);
+	OFFSET(HOST_SC_R10, sigcontext, r10);
+	OFFSET(HOST_SC_R11, sigcontext, r11);
+	OFFSET(HOST_SC_R12, sigcontext, r12);
+	OFFSET(HOST_SC_R13, sigcontext, r13);
+	OFFSET(HOST_SC_R14, sigcontext, r14);
+	OFFSET(HOST_SC_R15, sigcontext, r15);
+	OFFSET(HOST_SC_IP, sigcontext, rip);
+	OFFSET(HOST_SC_SP, sigcontext, rsp);
+	OFFSET(HOST_SC_CR2, sigcontext, cr2);
+	OFFSET(HOST_SC_ERR, sigcontext, err);
+	OFFSET(HOST_SC_TRAPNO, sigcontext, trapno);
+	OFFSET(HOST_SC_CS, sigcontext, cs);
+	OFFSET(HOST_SC_FS, sigcontext, fs);
+	OFFSET(HOST_SC_GS, sigcontext, gs);
+	OFFSET(HOST_SC_EFLAGS, sigcontext, eflags);
+	OFFSET(HOST_SC_SIGMASK, sigcontext, oldmask);
 #if 0
-	OFFSET(SC_ORIG_RAX, sigcontext, orig_rax);
-	OFFSET(SC_DS, sigcontext, ds);
-	OFFSET(SC_ES, sigcontext, es);
-	OFFSET(SC_SS, sigcontext, ss);
+	OFFSET(HOST_SC_ORIG_RAX, sigcontext, orig_rax);
+	OFFSET(HOST_SC_DS, sigcontext, ds);
+	OFFSET(HOST_SC_ES, sigcontext, es);
+	OFFSET(HOST_SC_SS, sigcontext, ss);
 #endif
 
-	DEFINE(HOST_FRAME_SIZE, FRAME_SIZE);
-	DEFINE(HOST_RBX, RBX);
-	DEFINE(HOST_RCX, RCX);
-	DEFINE(HOST_RDI, RDI);
-	DEFINE(HOST_RSI, RSI);
-	DEFINE(HOST_RDX, RDX);
-	DEFINE(HOST_RBP, RBP);
-	DEFINE(HOST_RAX, RAX);
-	DEFINE(HOST_R8, R8);
-	DEFINE(HOST_R9, R9);
-	DEFINE(HOST_R10, R10);
-	DEFINE(HOST_R11, R11);
-	DEFINE(HOST_R12, R12);
-	DEFINE(HOST_R13, R13);
-	DEFINE(HOST_R14, R14);
-	DEFINE(HOST_R15, R15);
-	DEFINE(HOST_ORIG_RAX, ORIG_RAX);
-	DEFINE(HOST_CS, CS);
-	DEFINE(HOST_SS, SS);
-	DEFINE(HOST_EFLAGS, EFLAGS);
+	DEFINE_LONGS(HOST_FRAME_SIZE, FRAME_SIZE);
+	DEFINE(HOST_FP_SIZE, 0);
+	DEFINE(HOST_XFP_SIZE, 0);
+	DEFINE_LONGS(HOST_RBX, RBX);
+	DEFINE_LONGS(HOST_RCX, RCX);
+	DEFINE_LONGS(HOST_RDI, RDI);
+	DEFINE_LONGS(HOST_RSI, RSI);
+	DEFINE_LONGS(HOST_RDX, RDX);
+	DEFINE_LONGS(HOST_RBP, RBP);
+	DEFINE_LONGS(HOST_RAX, RAX);
+	DEFINE_LONGS(HOST_R8, R8);
+	DEFINE_LONGS(HOST_R9, R9);
+	DEFINE_LONGS(HOST_R10, R10);
+	DEFINE_LONGS(HOST_R11, R11);
+	DEFINE_LONGS(HOST_R12, R12);
+	DEFINE_LONGS(HOST_R13, R13);
+	DEFINE_LONGS(HOST_R14, R14);
+	DEFINE_LONGS(HOST_R15, R15);
+	DEFINE_LONGS(HOST_ORIG_RAX, ORIG_RAX);
+	DEFINE_LONGS(HOST_CS, CS);
+	DEFINE_LONGS(HOST_SS, SS);
+	DEFINE_LONGS(HOST_EFLAGS, EFLAGS);
 #if 0
-	DEFINE(HOST_FS, FS);
-	DEFINE(HOST_GS, GS);
-	DEFINE(HOST_DS, DS);
-	DEFINE(HOST_ES, ES);
+	DEFINE_LONGS(HOST_FS, FS);
+	DEFINE_LONGS(HOST_GS, GS);
+	DEFINE_LONGS(HOST_DS, DS);
+	DEFINE_LONGS(HOST_ES, ES);
 #endif
 
-	DEFINE(HOST_IP, RIP);
-	DEFINE(HOST_SP, RSP);
-	DEFINE(__UM_FRAME_SIZE, sizeof(struct user_regs_struct));
+	DEFINE_LONGS(HOST_IP, RIP);
+	DEFINE_LONGS(HOST_SP, RSP);
+	DEFINE(UM_FRAME_SIZE, sizeof(struct user_regs_struct));
 }
diff --git a/arch/um/sys-x86_64/util/Makefile b/arch/um/sys-x86_64/util/Makefile
deleted file mode 100644
index 75b052cfc20..00000000000
--- a/arch/um/sys-x86_64/util/Makefile
+++ /dev/null
@@ -1,8 +0,0 @@
-# Copyright 2003 - 2004 Pathscale, Inc
-# Released under the GPL
-
-hostprogs-y	:= mk_sc mk_thread
-always		:= $(hostprogs-y)
-
-HOSTCFLAGS_mk_sc.o := -I$(objtree)/arch/um
-HOSTCFLAGS_mk_thread.o := -I$(objtree)/arch/um
diff --git a/arch/um/sys-x86_64/util/mk_sc.c b/arch/um/sys-x86_64/util/mk_sc.c
deleted file mode 100644
index 7619bc377c1..00000000000
--- a/arch/um/sys-x86_64/util/mk_sc.c
+++ /dev/null
@@ -1,47 +0,0 @@
-/* Copyright (C) 2003 - 2004 PathScale, Inc
- * Released under the GPL
- */
-
-#include <stdio.h>
-#include <user-offsets.h>
-
-#define SC_OFFSET(name) \
-  printf("#define " #name \
-	 "(sc) *((unsigned long *) &(((char *) (sc))[%d]))\n",\
-	 name)
-
-int main(int argc, char **argv)
-{
-  SC_OFFSET(SC_RBX);
-  SC_OFFSET(SC_RCX);
-  SC_OFFSET(SC_RDX);
-  SC_OFFSET(SC_RSI);
-  SC_OFFSET(SC_RDI);
-  SC_OFFSET(SC_RBP);
-  SC_OFFSET(SC_RAX);
-  SC_OFFSET(SC_R8);
-  SC_OFFSET(SC_R9);
-  SC_OFFSET(SC_R10);
-  SC_OFFSET(SC_R11);
-  SC_OFFSET(SC_R12);
-  SC_OFFSET(SC_R13);
-  SC_OFFSET(SC_R14);
-  SC_OFFSET(SC_R15);
-  SC_OFFSET(SC_IP);
-  SC_OFFSET(SC_SP);
-  SC_OFFSET(SC_CR2);
-  SC_OFFSET(SC_ERR);
-  SC_OFFSET(SC_TRAPNO);
-  SC_OFFSET(SC_CS);
-  SC_OFFSET(SC_FS);
-  SC_OFFSET(SC_GS);
-  SC_OFFSET(SC_EFLAGS);
-  SC_OFFSET(SC_SIGMASK);
-#if 0
-  SC_OFFSET(SC_ORIG_RAX);
-  SC_OFFSET(SC_DS);
-  SC_OFFSET(SC_ES);
-  SC_OFFSET(SC_SS);
-#endif
-  return(0);
-}
diff --git a/arch/um/sys-x86_64/util/mk_thread.c b/arch/um/sys-x86_64/util/mk_thread.c
deleted file mode 100644
index 15517396e9c..00000000000
--- a/arch/um/sys-x86_64/util/mk_thread.c
+++ /dev/null
@@ -1,20 +0,0 @@
-#include <stdio.h>
-#include <kernel-offsets.h>
-
-int main(int argc, char **argv)
-{
-  printf("/*\n");
-  printf(" * Generated by mk_thread\n");
-  printf(" */\n");
-  printf("\n");
-  printf("#ifndef __UM_THREAD_H\n");
-  printf("#define __UM_THREAD_H\n");
-  printf("\n");
-#ifdef TASK_EXTERN_PID
-  printf("#define TASK_EXTERN_PID(task) *((int *) &(((char *) (task))[%d]))\n",
-	 TASK_EXTERN_PID);
-#endif
-  printf("\n");
-  printf("#endif\n");
-  return(0);
-}