| Message ID | 20190617132222.32182-2-aastier@freebox.fr (mailing list archive) |
|---|---|
| State | Mainlined, archived |
| Commit | 35341ca0614ab13e1ef34ad4f29a39e15ef31fa8 |
| Headers | show |
| Series | [v3,1/2] arm64: ssbd: explicitly depend on <linux/prctl.h> | expand |
On Mon, Jun 17, 2019 at 03:22:22PM +0200, Anisse Astier wrote: > Otherwise this will create userspace build issues for any program > (strace, qemu) that includes both <sys/prctl.h> (with musl libc) and > <linux/ptrace.h> (which then includes <asm/ptrace.h>), like this: > > error: redefinition of 'struct prctl_mm_map' > struct prctl_mm_map { > > See https://github.com/foundriesio/meta-lmp/commit/6d4a106e191b5d79c41b9ac78fd321316d3013c0 > for a public example of people working around this issue. > > Copying the defines is a bit imperfect here, but better than creating a > whole other header for just two defines that would never change, as part > of the kernel ABI. > > This patch depends on patch "arm64: ssbd: explicitly depend on > <linux/prctl.h>" for kernel >= 4.18 > > Fixes: 43d4da2c45b2 ("arm64/sve: ptrace and ELF coredump support") > Cc: stable@vger.kernel.org > Signed-off-by: Anisse Astier <aastier@freebox.fr> > --- > arch/arm64/include/uapi/asm/ptrace.h | 8 +++----- > 1 file changed, 3 insertions(+), 5 deletions(-) I've pushed these two out to the arm64 fixes branch [1], with Dave's Ack on this one. Note that I reworked the commit messages a bit to explain better what's going on. Cheers, Will [1] https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/log/?h=for-next/fixes
diff --git a/arch/arm64/include/uapi/asm/ptrace.h b/arch/arm64/include/uapi/asm/ptrace.h index 97c53203150b..e932284993d4 100644 --- a/arch/arm64/include/uapi/asm/ptrace.h +++ b/arch/arm64/include/uapi/asm/ptrace.h @@ -65,8 +65,6 @@ #ifndef __ASSEMBLY__ -#include <linux/prctl.h> - /* * User structures for general purpose, floating point and debug registers. */ @@ -113,10 +111,10 @@ struct user_sve_header { /* * Common SVE_PT_* flags: - * These must be kept in sync with prctl interface in <linux/ptrace.h> + * These must be kept in sync with prctl interface in <linux/prctl.h> */ -#define SVE_PT_VL_INHERIT (PR_SVE_VL_INHERIT >> 16) -#define SVE_PT_VL_ONEXEC (PR_SVE_SET_VL_ONEXEC >> 16) +#define SVE_PT_VL_INHERIT ((1 << 17) /* PR_SVE_VL_INHERIT */ >> 16) +#define SVE_PT_VL_ONEXEC ((1 << 18) /* PR_SVE_SET_VL_ONEXEC */ >> 16) /*
Otherwise this will create userspace build issues for any program (strace, qemu) that includes both <sys/prctl.h> (with musl libc) and <linux/ptrace.h> (which then includes <asm/ptrace.h>), like this: error: redefinition of 'struct prctl_mm_map' struct prctl_mm_map { See https://github.com/foundriesio/meta-lmp/commit/6d4a106e191b5d79c41b9ac78fd321316d3013c0 for a public example of people working around this issue. Copying the defines is a bit imperfect here, but better than creating a whole other header for just two defines that would never change, as part of the kernel ABI. This patch depends on patch "arm64: ssbd: explicitly depend on <linux/prctl.h>" for kernel >= 4.18 Fixes: 43d4da2c45b2 ("arm64/sve: ptrace and ELF coredump support") Cc: stable@vger.kernel.org Signed-off-by: Anisse Astier <aastier@freebox.fr> --- arch/arm64/include/uapi/asm/ptrace.h | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-)