s390/gs: add regset for the guarded storage broadcast control block (e525f8a6) · Commits · 戴 / test

arch/s390/kernel/ptrace.c

+46 −0

Original line number	Diff line number	Diff line
		@@ -1171,10 +1171,48 @@ static int s390_gs_cb_set(struct task_struct *target,
		{
		struct gs_cb *data = target->thread.gs_cb;

		if (!MACHINE_HAS_GS)
		return -ENODEV;
		if (!data) {
		data = kzalloc(sizeof(*data), GFP_KERNEL);
		if (!data)
		return -ENOMEM;
		target->thread.gs_cb = data;
		}
		return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
		data, 0, sizeof(struct gs_cb));
		}

		static int s390_gs_bc_get(struct task_struct *target,
		const struct user_regset *regset,
		unsigned int pos, unsigned int count,
		void kbuf, void __user ubuf)
		{
		struct gs_cb *data = target->thread.gs_bc_cb;

		if (!MACHINE_HAS_GS)
		return -ENODEV;
		if (!data)
		return -ENODATA;
		return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
		data, 0, sizeof(struct gs_cb));
		}

		static int s390_gs_bc_set(struct task_struct *target,
		const struct user_regset *regset,
		unsigned int pos, unsigned int count,
		const void kbuf, const void __user ubuf)
		{
		struct gs_cb *data = target->thread.gs_bc_cb;

		if (!MACHINE_HAS_GS)
		return -ENODEV;
		if (!data) {
		data = kzalloc(sizeof(*data), GFP_KERNEL);
		if (!data)
		return -ENOMEM;
		target->thread.gs_bc_cb = data;
		}
		return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
		data, 0, sizeof(struct gs_cb));
		}
		@@ -1244,6 +1282,14 @@ static const struct user_regset s390_regsets[] = {
		.get = s390_gs_cb_get,
		.set = s390_gs_cb_set,
		},
		{
		.core_note_type = NT_S390_GS_BC,
		.n = sizeof(struct gs_cb) / sizeof(__u64),
		.size = sizeof(__u64),
		.align = sizeof(__u64),
		.get = s390_gs_bc_get,
		.set = s390_gs_bc_set,
		},
		};

		static const struct user_regset_view user_s390_view = {

include/uapi/linux/elf.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -410,6 +410,7 @@ typedef struct elf64_shdr {
		#define NT_S390_VXRS_LOW 0x309 /* s390 vector registers 0-15 upper half */
		#define NT_S390_VXRS_HIGH 0x30a /* s390 vector registers 16-31 */
		#define NT_S390_GS_CB 0x30b /* s390 guarded storage registers */
		#define NT_S390_GS_BC 0x30c /* s390 guarded storage broadcast control block */
		#define NT_ARM_VFP 0x400 /* ARM VFP/NEON registers */
		#define NT_ARM_TLS 0x401 /* ARM TLS register */
		#define NT_ARM_HW_BREAK 0x402 /* ARM hardware breakpoint registers */

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