uml: Add 4.9 kernel patches

102-pseudo-random-mac.patch required an update to the new style asynchronous crypto Signed-off-by: Florian Fainelli <[email protected]>
Elewei · Oct 24, 2017 · fd75e4d · fd75e4d
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diff --git a/target/linux/uml/patches-4.9/000-um-Avoid-longjmp-setjmp-symbol-clashes-with-libpthre.patch b/target/linux/uml/patches-4.9/000-um-Avoid-longjmp-setjmp-symbol-clashes-with-libpthre.patch
@@ -0,0 +1,130 @@
+From f44f1e7da7c8e3f4575d5d61c4df978496903fcc Mon Sep 17 00:00:00 2001
+From: Florian Fainelli <[email protected]>
+Date: Tue, 23 May 2017 17:32:31 -0700
+Subject: [PATCH] um: Avoid longjmp/setjmp symbol clashes with libpthread.a
+
+[ Upstream commit f44f1e7da7c8e3f4575d5d61c4df978496903fcc ]
+
+Building a statically linked UML kernel on a Centos 6.9 host resulted in
+the following linking failure (GCC 4.4, glibc-2.12):
+
+/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../lib64/libpthread.a(libpthread.o):
+In function `siglongjmp':
+(.text+0x8490): multiple definition of `longjmp'
+arch/x86/um/built-in.o:/local/users/fainelli/openwrt/trunk/build_dir/target-x86_64_musl/linux-uml/linux-4.4.69/arch/x86/um/setjmp_64.S:44:
+first defined here
+/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../lib64/libpthread.a(libpthread.o):
+In function `sem_open':
+(.text+0x77cd): warning: the use of `mktemp' is dangerous, better use
+`mkstemp'
+collect2: ld returned 1 exit status
+make[4]: *** [vmlinux] Error 1
+
+Adopt a solution similar to the one done for vmap where we define
+longjmp/setjmp to be kernel_longjmp/setjmp. In the process, make sure we
+do rename the functions in arch/x86/um/setjmp_*.S accordingly.
+
+Fixes: a7df4716d195 ("um: link with -lpthread")
+Signed-off-by: Florian Fainelli <[email protected]>
+Signed-off-by: Richard Weinberger <[email protected]>
+---
+ arch/um/Makefile        |  4 ++++
+ arch/x86/um/setjmp_32.S | 16 ++++++++--------
+ arch/x86/um/setjmp_64.S | 16 ++++++++--------
+ 3 files changed, 20 insertions(+), 16 deletions(-)
+
+--- a/arch/um/Makefile
++++ b/arch/um/Makefile
+@@ -59,10 +59,14 @@ KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_D
+ # Same things for in6addr_loopback and mktime - found in libc. For these two we
+ # only get link-time error, luckily.
+ #
++# -Dlongjmp=kernel_longjmp prevents anything from referencing the libpthread.a
++# embedded copy of longjmp, same thing for setjmp.
++#
+ # These apply to USER_CFLAGS to.
+
+ KBUILD_CFLAGS += $(CFLAGS) $(CFLAGS-y) -D__arch_um__ \
+ 	$(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap	\
++	-Dlongjmp=kernel_longjmp -Dsetjmp=kernel_setjmp \
+ 	-Din6addr_loopback=kernel_in6addr_loopback \
+ 	-Din6addr_any=kernel_in6addr_any -Dstrrchr=kernel_strrchr
+
+--- a/arch/x86/um/setjmp_32.S
++++ b/arch/x86/um/setjmp_32.S
+@@ -16,9 +16,9 @@
+
+ 	.text
+ 	.align 4
+-	.globl setjmp
+-	.type setjmp, @function
+-setjmp:
++	.globl kernel_setjmp
++	.type kernel_setjmp, @function
++kernel_setjmp:
+ #ifdef _REGPARM
+ 	movl %eax,%edx
+ #else
+@@ -35,13 +35,13 @@ setjmp:
+ 	movl %ecx,20(%edx)		# Return address
+ 	ret
+
+-	.size setjmp,.-setjmp
++	.size kernel_setjmp,.-kernel_setjmp
+
+ 	.text
+ 	.align 4
+-	.globl longjmp
+-	.type longjmp, @function
+-longjmp:
++	.globl kernel_longjmp
++	.type kernel_longjmp, @function
++kernel_longjmp:
+ #ifdef _REGPARM
+ 	xchgl %eax,%edx
+ #else
+@@ -55,4 +55,4 @@ longjmp:
+ 	movl 16(%edx),%edi
+ 	jmp *20(%edx)
+
+-	.size longjmp,.-longjmp
++	.size kernel_longjmp,.-kernel_longjmp
+--- a/arch/x86/um/setjmp_64.S
++++ b/arch/x86/um/setjmp_64.S
+@@ -18,9 +18,9 @@
+
+ 	.text
+ 	.align 4
+-	.globl setjmp
+-	.type setjmp, @function
+-setjmp:
++	.globl kernel_setjmp
++	.type kernel_setjmp, @function
++kernel_setjmp:
+ 	pop  %rsi			# Return address, and adjust the stack
+ 	xorl %eax,%eax			# Return value
+ 	movq %rbx,(%rdi)
+@@ -34,13 +34,13 @@ setjmp:
+ 	movq %rsi,56(%rdi)		# Return address
+ 	ret
+
+-	.size setjmp,.-setjmp
++	.size kernel_setjmp,.-kernel_setjmp
+
+ 	.text
+ 	.align 4
+-	.globl longjmp
+-	.type longjmp, @function
+-longjmp:
++	.globl kernel_longjmp
++	.type kernel_longjmp, @function
++kernel_longjmp:
+ 	movl %esi,%eax			# Return value (int)
+ 	movq (%rdi),%rbx
+ 	movq 8(%rdi),%rsp
+@@ -51,4 +51,4 @@ longjmp:
+ 	movq 48(%rdi),%r15
+ 	jmp *56(%rdi)
+
+-	.size longjmp,.-longjmp
++	.size kernel_longjmp,.-kernel_longjmp
diff --git a/target/linux/uml/patches-4.9/001-um-Allow-building-and-running-on-older-hosts.patch b/target/linux/uml/patches-4.9/001-um-Allow-building-and-running-on-older-hosts.patch
@@ -0,0 +1,99 @@
+From 0a987645672ebde7844a9c0732a5a25f3d4bb6c6 Mon Sep 17 00:00:00 2001
+From: Florian Fainelli <[email protected]>
+Date: Thu, 25 May 2017 11:36:26 -0700
+Subject: [PATCH] um: Allow building and running on older hosts
+
+[ Upstream commit 0a987645672ebde7844a9c0732a5a25f3d4bb6c6 ]
+
+Commit a78ff1112263 ("um: add extended processor state save/restore
+support") and b6024b21fec8 ("um: extend fpstate to _xstate to support
+YMM registers") forced the use of the x86 FP _xstate and
+PTRACE_GETREGSET/SETREGSET. On older hosts, we would neither be able to
+build UML nor run it anymore with these two commits applied because we
+don't have definitions for struct _xstate nor these two ptrace requests.
+
+We can determine at build time which fp context structure to check
+against, just like we can keep using the old i387 fp save/restore if
+PTRACE_GETRESET/SETREGSET are not defined.
+
+Fixes: a78ff1112263 ("um: add extended processor state save/restore support")
+Fixes: b6024b21fec8 ("um: extend fpstate to _xstate to support YMM registers")
+Signed-off-by: Florian Fainelli <[email protected]>
+Signed-off-by: Richard Weinberger <[email protected]>
+---
+ arch/x86/um/os-Linux/registers.c | 12 ++++++++----
+ arch/x86/um/user-offsets.c       |  4 ++++
+ 2 files changed, 12 insertions(+), 4 deletions(-)
+
+--- a/arch/x86/um/os-Linux/registers.c
++++ b/arch/x86/um/os-Linux/registers.c
+@@ -26,6 +26,7 @@ int save_i387_registers(int pid, unsigne
+
+ int save_fp_registers(int pid, unsigned long *fp_regs)
+ {
++#ifdef PTRACE_GETREGSET
+ 	struct iovec iov;
+
+ 	if (have_xstate_support) {
+@@ -34,9 +35,9 @@ int save_fp_registers(int pid, unsigned 
+ 		if (ptrace(PTRACE_GETREGSET, pid, NT_X86_XSTATE, &iov) < 0)
+ 			return -errno;
+ 		return 0;
+-	} else {
++	} else
++#endif
+ 		return save_i387_registers(pid, fp_regs);
+-	}
+ }
+
+ int restore_i387_registers(int pid, unsigned long *fp_regs)
+@@ -48,6 +49,7 @@ int restore_i387_registers(int pid, unsi
+
+ int restore_fp_registers(int pid, unsigned long *fp_regs)
+ {
++#ifdef PTRACE_SETREGSET
+ 	struct iovec iov;
+
+ 	if (have_xstate_support) {
+@@ -56,9 +58,9 @@ int restore_fp_registers(int pid, unsign
+ 		if (ptrace(PTRACE_SETREGSET, pid, NT_X86_XSTATE, &iov) < 0)
+ 			return -errno;
+ 		return 0;
+-	} else {
++	} else
++#endif
+ 		return restore_i387_registers(pid, fp_regs);
+-	}
+ }
+
+ #ifdef __i386__
+@@ -122,6 +124,7 @@ int put_fp_registers(int pid, unsigned l
+
+ void arch_init_registers(int pid)
+ {
++#ifdef PTRACE_GETREGSET
+ 	struct _xstate fp_regs;
+ 	struct iovec iov;
+
+@@ -129,6 +132,7 @@ void arch_init_registers(int pid)
+ 	iov.iov_len = sizeof(struct _xstate);
+ 	if (ptrace(PTRACE_GETREGSET, pid, NT_X86_XSTATE, &iov) == 0)
+ 		have_xstate_support = 1;
++#endif
+ }
+ #endif
+
+--- a/arch/x86/um/user-offsets.c
++++ b/arch/x86/um/user-offsets.c
+@@ -50,7 +50,11 @@ void foo(void)
+ 	DEFINE(HOST_GS, GS);
+ 	DEFINE(HOST_ORIG_AX, ORIG_EAX);
+ #else
++#if defined(PTRACE_GETREGSET) && defined(PTRACE_SETREGSET)
+ 	DEFINE(HOST_FP_SIZE, sizeof(struct _xstate) / sizeof(unsigned long));
++#else
++	DEFINE(HOST_FP_SIZE, sizeof(struct _fpstate) / sizeof(unsigned long));
++#endif
+ 	DEFINE_LONGS(HOST_BX, RBX);
+ 	DEFINE_LONGS(HOST_CX, RCX);
+ 	DEFINE_LONGS(HOST_DI, RDI);
diff --git a/target/linux/uml/patches-4.9/002-um-Correctly-check-for-PTRACE_GETRESET-SETREGSET.patch b/target/linux/uml/patches-4.9/002-um-Correctly-check-for-PTRACE_GETRESET-SETREGSET.patch
@@ -0,0 +1,29 @@
+From 61e8d462457f202bf0c6393133425ad387825e22 Mon Sep 17 00:00:00 2001
+From: Richard Weinberger <[email protected]>
+Date: Thu, 6 Jul 2017 09:35:27 +0200
+Subject: [PATCH] um: Correctly check for PTRACE_GETRESET/SETREGSET
+
+[ Upstream commit 61e8d462457f202bf0c6393133425ad387825e22 ]
+
+When checking for PTRACE_GETRESET/SETREGSET, make sure that
+the correct header file is included. We need linux/ptrace.h
+which contains all ptrace UAPI related defines.
+Otherwise #if defined(PTRACE_GETRESET) is always false.
+
+Cc: Florian Fainelli <[email protected]>
+Signed-off-by: Richard Weinberger <[email protected]>
+---
+ arch/x86/um/user-offsets.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/arch/x86/um/user-offsets.c
++++ b/arch/x86/um/user-offsets.c
+@@ -5,7 +5,7 @@
+ #include <sys/mman.h>
+ #include <sys/user.h>
+ #define __FRAME_OFFSETS
+-#include <asm/ptrace.h>
++#include <linux/ptrace.h>
+ #include <asm/types.h>
+
+ #ifdef __i386__
diff --git a/target/linux/uml/patches-4.9/003-um-Fix-check-for-_xstate-for-older-hosts.patch b/target/linux/uml/patches-4.9/003-um-Fix-check-for-_xstate-for-older-hosts.patch
@@ -0,0 +1,46 @@
+From 2fb44600fe784449404c6639de26af8361999ec7 Mon Sep 17 00:00:00 2001
+From: Florian Fainelli <[email protected]>
+Date: Tue, 18 Jul 2017 16:43:47 -0700
+Subject: [PATCH] um: Fix check for _xstate for older hosts
+
+Commit 0a987645672e ("um: Allow building and running on older
+hosts") attempted to check for PTRACE_{GET,SET}REGSET under the premise
+that these ptrace(2) parameters were directly linked with the presence
+of the _xstate structure.
+
+After Richard's commit 61e8d462457f ("um: Correctly check for
+PTRACE_GETRESET/SETREGSET") which properly included linux/ptrace.h
+instead of asm/ptrace.h, we could get into the original build failure
+that I reported:
+
+arch/x86/um/user-offsets.c: In function 'foo':
+arch/x86/um/user-offsets.c:54: error: invalid application of 'sizeof' to
+incomplete type 'struct _xstate'
+
+On this particular host, we do have PTRACE_GETREGSET and
+PTRACE_SETREGSET defined in linux/ptrace.h, but not the structure
+_xstate that should be pulled from the following include chain: signal.h
+-> bits/sigcontext.h.
+
+Correctly fix this by checking for FP_XSTATE_MAGIC1 which is the correct
+way to see if struct _xstate is available or not on the host.
+
+Fixes: 61e8d462457f ("um: Correctly check for PTRACE_GETRESET/SETREGSET")
+Fixes: 0a987645672e ("um: Allow building and running on older hosts")
+Signed-off-by: Florian Fainelli <[email protected]>
+Signed-off-by: Richard Weinberger <[email protected]>
+---
+ arch/x86/um/user-offsets.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/arch/x86/um/user-offsets.c
++++ b/arch/x86/um/user-offsets.c
+@@ -50,7 +50,7 @@ void foo(void)
+ 	DEFINE(HOST_GS, GS);
+ 	DEFINE(HOST_ORIG_AX, ORIG_EAX);
+ #else
+-#if defined(PTRACE_GETREGSET) && defined(PTRACE_SETREGSET)
++#ifdef FP_XSTATE_MAGIC1
+ 	DEFINE(HOST_FP_SIZE, sizeof(struct _xstate) / sizeof(unsigned long));
+ #else
+ 	DEFINE(HOST_FP_SIZE, sizeof(struct _fpstate) / sizeof(unsigned long));