Messages in this thread | | | Date | Wed, 15 Nov 2017 12:04:16 +0100 | From | Krzysztof Mazur <> | Subject | Re: [PATCH] um: use POSIX ucontext_t instead of struct ucontext |
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On Wed, Nov 15, 2017 at 11:19:41AM +0100, Richard Weinberger wrote: > Am Mittwoch, 15. November 2017, 11:12:39 CET schrieb Krzysztof Mazur: > > glibc 2.26 removed the 'struct ucontext' to "improve" POSIX compliance > > and break programs, including User Mode Linux. Fix User Mode Linux > > by using POSIX ucontext_t. > > > > This fixes: > > > > arch/um/os-Linux/signal.c: In function 'hard_handler': > > arch/um/os-Linux/signal.c:163:22: error: dereferencing pointer to incomplete > > type 'struct ucontext' mcontext_t *mc = &uc->uc_mcontext; > > arch/x86/um/stub_segv.c: In function 'stub_segv_handler': > > arch/x86/um/stub_segv.c:16:13: error: dereferencing pointer to incomplete > > type 'struct ucontext' &uc->uc_mcontext); > > Do all older glibcs have ucontext_t? > Otherwise this patch will break other stuff.
Yes, ucontext_t typedef was always available. They changed:
typedef struct ucontext { ... } ucontex_t;
to
typedef struct ucontext_t { ... } ucontex_t;
https://sourceware.org/glibc/wiki/Release/2.26#Removal_of_.27struct_ucontext.27
Thanks, Krzysiek
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