From c739e191d0697e29110d4eb446e537ff336324c6 Mon Sep 17 00:00:00 2001 From: Szabolcs Nagy Date: Mon, 22 Jan 2018 11:13:31 +0000 Subject: aarch64: Revert the change of the __reserved member of mcontext_t The uc_mcontext.__reserved member of ucontext_t is a user visible API, that should not be changed, because this is the only way to access cpu states of various extensions of linux asm/sigcontext.h, it does not violate namespace rules either, so revert this part of the commit commit 4fa9b3bfe6759c82beb4b043a54a3598ca467289 Commit: Joseph Myers Fix mcontext_t sigcontext namespace (bug 21457). (In principle the user can type cast &uc_mcontext to struct sigcontext* to use the linux sigcontext fields, but that's not the existing practice since mcontext_t used to be a typedef of struct sigcontext.) [BZ #22742] * sysdeps/unix/sysv/linux/aarch64/sys/ucontext.h (__glibc_reserved1): Rename to __reserved and add comment. * sysdeps/unix/sysv/linux/aarch64/ucontext_i.sym (__glibc_reserved1): Rename to __reserved. --- sysdeps/unix/sysv/linux/aarch64/sys/ucontext.h | 6 +++++- sysdeps/unix/sysv/linux/aarch64/ucontext_i.sym | 2 +- 2 files changed, 6 insertions(+), 2 deletions(-) (limited to 'sysdeps/unix/sysv') diff --git a/sysdeps/unix/sysv/linux/aarch64/sys/ucontext.h b/sysdeps/unix/sysv/linux/aarch64/sys/ucontext.h index fe72fdd265..f1b3ab59e2 100644 --- a/sysdeps/unix/sysv/linux/aarch64/sys/ucontext.h +++ b/sysdeps/unix/sysv/linux/aarch64/sys/ucontext.h @@ -56,7 +56,11 @@ typedef struct unsigned long long int __ctx(sp); unsigned long long int __ctx(pc); unsigned long long int __ctx(pstate); - unsigned char __glibc_reserved1[4096] __attribute__ ((__aligned__ (16))); + /* This field contains extension records for additional processor + state such as the FP/SIMD state. It has to match the definition + of the corresponding field in the sigcontext struct, see the + arch/arm64/include/uapi/asm/sigcontext.h linux header for details. */ + unsigned char __reserved[4096] __attribute__ ((__aligned__ (16))); } mcontext_t; /* Userlevel context. */ diff --git a/sysdeps/unix/sysv/linux/aarch64/ucontext_i.sym b/sysdeps/unix/sysv/linux/aarch64/ucontext_i.sym index 479bdda5c6..ab3930c173 100644 --- a/sysdeps/unix/sysv/linux/aarch64/ucontext_i.sym +++ b/sysdeps/unix/sysv/linux/aarch64/ucontext_i.sym @@ -38,7 +38,7 @@ oX0 mcontext (regs) oSP mcontext (sp) oPC mcontext (pc) oPSTATE mcontext (pstate) -oEXTENSION mcontext (__glibc_reserved1) +oEXTENSION mcontext (__reserved) #define fpsimd_context(member) offsetof (struct fpsimd_context, member) -- cgit 1.4.1