update

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@97 c046a42c-6fe2-441c-8c8c-71466251a162

Changelog

@@ -1,8 +1,11 @@
 version 0.1.6:
 
+ - automatic library search system. QEMU can now work with unpatched
+   ELF dynamic loader and libc (Rusty Russell).
  - ISO C warning fixes (Alistair Strachan)
- - first self-virtualizable version (works only as long as the icache
+ - first self-virtualizable version (works only as long as the
-   is not flushed)
+   translation cache is not flushed)
+ - RH9 fixes
 
 version 0.1.5:
 

Makefile

@@ -45,7 +45,7 @@ LDFLAGS+=-p
 main.o: CFLAGS+=-p
 endif
 
-OBJS= elfload.o main.o syscall.o signal.o
+OBJS= elfload.o main.o syscall.o signal.o path.o
 SRCS:= $(OBJS:.o=.c)
 OBJS+= libqemu.a
 
@@ -110,13 +110,14 @@ elfload.c   main.c            signal.c        thunk.h\
 cpu-i386.h qemu.h op-i386.c opc-i386.h syscall-i386.h  translate-i386.c\
 dis-asm.h    gen-i386.h  syscall.c\
 dis-buf.c    i386-dis.c  opreg_template.h  syscall_defs.h\
-ppc.ld s390.ld exec-i386.h exec-i386.c configure \
+ppc.ld s390.ld exec-i386.h exec-i386.c path.c configure \
 tests/Makefile\
 tests/test-i386.c tests/test-i386-shift.h tests/test-i386.h\
 tests/test-i386-muldiv.h tests/test-i386-code16.S\
 tests/hello.c tests/hello tests/sha1.c \
 tests/testsig.c tests/testclone.c tests/testthread.c \
 tests/runcom.c tests/pi_10.com \
+tests/test_path.c \
 qemu-doc.texi qemu-doc.html
 
 FILE=qemu-$(VERSION)
@@ -132,10 +133,10 @@ tar:
 BINPATH=/usr/local/qemu-i386
 
 tarbin:
-	tar zcvf /tmp/qemu-i386-glibc21.tar.gz \
+	tar zcvf /tmp/qemu-$(VERSION)-i386-glibc21.tar.gz \
-                 $(BINPATH)/etc $(BINPATH)/lib $(BINPATH)/bin
+                 $(BINPATH)/etc $(BINPATH)/lib $(BINPATH)/bin $(BINPATH)/usr
-	tar zcvf /tmp/qemu-i386-wine.tar.gz \
+	tar zcvf /tmp/qemu-$(VERSION)-i386-wine.tar.gz \
-                 $(BINPATH)/X11R6 $(BINPATH)/wine
+                 $(BINPATH)/wine
 
 ifneq ($(wildcard .depend),)
 include .depend

README

@@ -6,7 +6,7 @@ INSTALLATION
 
 Type 
 
-    ./configure
+    ./configure --interp-prefix=/usr/local/qemu-i386
     make
 
 to build qemu and libqemu.a.
@@ -23,7 +23,7 @@ libraries installed on your PC. For example:
     ./qemu -L / /bin/ls
 
 * On non x86 CPUs, you need first to download at least an x86 glibc
-(qemu-i386-glibc21.tar.gz on the qemu web page). Ensure that
+(qemu-XXX-i386-glibc21.tar.gz on the qemu web page). Ensure that
 LD_LIBRARY_PATH is not set:
 
     unset LD_LIBRARY_PATH 

VERSION

@@ -1 +1 @@
-0.1.5
+0.1.6

configure

@@ -271,4 +271,4 @@ else
 	echo "config.h is unchanged"
 fi
 
-rm -f $TMPH
+rm -f $TMPO $TMPC $TMPE $TMPS $TMPH

qemu-doc.texi

@@ -36,6 +36,8 @@ User space LDT and GDT are emulated. VM86 mode is also supported
 
 @item Accurate signal handling by remapping host signals to virtual x86 signals.
 
+@item QEMU can emulate itself on x86 (experimental).
+
 @item The virtual x86 CPU is a library (@code{libqemu}) which can be used 
 in other projects.
 
@@ -50,9 +52,7 @@ Current QEMU Limitations:
 
 @item Not all x86 exceptions are precise (yet). [Very few programs need that].
 
-@item Not self virtualizable (yet). [You cannot launch qemu with qemu on the same CPU].
+@item No support for self-modifying code (yet). [Very few programs need that, a notable exception is QEMU itself !].
-
-@item No support for self modifying code (yet). [Very few programs need that, a notable exception is QEMU itself !].
 
 @item No SSE/MMX support (yet).
 
@@ -88,9 +88,14 @@ qemu -L / /bin/ls
 @code{-L /} tells that the x86 dynamic linker must be searched with a
 @file{/} prefix.
 
+@item Since QEMU is also a linux process, you can launch qemu with qemu:
+
+@example 
+qemu -L / qemu -L / /bin/ls
+@end example
 
 @item On non x86 CPUs, you need first to download at least an x86 glibc
-(@file{qemu-i386-glibc21.tar.gz} on the QEMU web page). Ensure that
+(@file{qemu-XXX-i386-glibc21.tar.gz} on the QEMU web page). Ensure that
 @code{LD_LIBRARY_PATH} is not set:
 
 @example
@@ -107,6 +112,11 @@ QEMU is automatically launched by the Linux kernel when you try to
 launch x86 executables. It requires the @code{binfmt_misc} module in the
 Linux kernel.
 
+@item The x86 version of QEMU is also included. You can try weird things such as:
+@example
+qemu /usr/local/qemu-i386/bin/qemu-i386 /usr/local/qemu-i386/bin/ls-i386
+@end example
+
 @end itemize
 
 @section Wine launch (Currently only tested when emulating x86 on x86)
@@ -122,7 +132,7 @@ qemu /usr/local/qemu-i386/bin/ls-i386
 @end example
 
 @item Download the binary x86 Wine install
-(@file{qemu-i386-wine.tar.gz} on the QEMU web page). 
+(@file{qemu-XXX-i386-wine.tar.gz} on the QEMU web page). 
 
 @item Configure Wine on your account. Look at the provided script
 @file{/usr/local/qemu-i386/bin/wine-conf.sh}. Your previous
@@ -302,6 +312,21 @@ thread.
 The virtual x86 CPU atomic operations are emulated with a global lock so
 that their semantic is preserved.
 
+@section Self-virtualization
+
+QEMU was conceived so that ultimately it can emulate itself. Althought
+it is not very useful, it is an important test to show the power of the
+emulator.
+
+Achieving self-virtualization is not easy because there may be address
+space conflicts. QEMU solves this problem by being an ELF shared object
+as the ld-linux.so ELF interpreter. That way, it can be relocated at
+load time.
+
+Since self-modifying code is not supported yet, QEMU cannot self
+virtualize itself in case of translation cache flush. This limitation
+will be suppressed soon.
+
 @section Bibliography
 
 @table @asis