4.18-stable review patch. If anyone has any objections, please let me know.
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From: Richard Weinberger richard@nod.at
commit 0676b957c24bfb6e495449ba7b7e72c5b5d79233 upstream.
32bit UML used to define PTRACE_SYSEMU and PTRACE_SYSEMU_SINGLESTEP own its own because many years ago not all libcs had these request codes in their UAPI. These days PTRACE_SYSEMU/_SINGLESTEP is well known and part of glibc and our own define becomes problematic.
With change c48831d0eebf ("linux/x86: sync sys/ptrace.h with Linux 4.14 [BZ #22433]") glibc turned PTRACE_SYSEMU/_SINGLESTEP into a enum and UML failed to build.
Let's drop our define and rely on the fact that every libc has PTRACE_SYSEMU/_SINGLESTEP.
Cc: stable@vger.kernel.org Cc: Ritesh Raj Sarraf rrs@researchut.com Reported-and-tested-by: Ritesh Raj Sarraf rrs@researchut.com Signed-off-by: Richard Weinberger richard@nod.at Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- arch/x86/um/shared/sysdep/ptrace_32.h | 10 ---------- 1 file changed, 10 deletions(-)
--- a/arch/x86/um/shared/sysdep/ptrace_32.h +++ b/arch/x86/um/shared/sysdep/ptrace_32.h @@ -10,20 +10,10 @@
static inline void update_debugregs(int seq) {}
-/* syscall emulation path in ptrace */ - -#ifndef PTRACE_SYSEMU -#define PTRACE_SYSEMU 31 -#endif - void set_using_sysemu(int value); int get_using_sysemu(void); extern int sysemu_supported;
-#ifndef PTRACE_SYSEMU_SINGLESTEP -#define PTRACE_SYSEMU_SINGLESTEP 32 -#endif - #define UPT_SYSCALL_ARG1(r) UPT_BX(r) #define UPT_SYSCALL_ARG2(r) UPT_CX(r) #define UPT_SYSCALL_ARG3(r) UPT_DX(r)