x86: ioperm user_regset (325af5fb) · Commits · 戴 / test

arch/x86/kernel/ptrace.c

+37 −0

Original line number	Diff line number	Diff line
		@@ -40,7 +40,9 @@ enum x86_regset {
		REGSET_GENERAL,
		REGSET_FP,
		REGSET_XFP,
		REGSET_IOPERM64 = REGSET_XFP,
		REGSET_TLS,
		REGSET_IOPERM32,
		};

		/*
		@@ -555,6 +557,29 @@ static int ptrace_set_debugreg(struct task_struct *child,
		return 0;
		}

		/*
		* These access the current or another (stopped) task's io permission
		* bitmap for debugging or core dump.
		*/
		static int ioperm_active(struct task_struct *target,
		const struct user_regset *regset)
		{
		return target->thread.io_bitmap_max / regset->size;
		}

		static int ioperm_get(struct task_struct *target,
		const struct user_regset *regset,
		unsigned int pos, unsigned int count,
		void kbuf, void __user ubuf)
		{
		if (!target->thread.io_bitmap_ptr)
		return -ENXIO;

		return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
		target->thread.io_bitmap_ptr,
		0, IO_BITMAP_BYTES);
		}

		#ifdef CONFIG_X86_PTRACE_BTS
		/*
		* The configuration for a particular BTS hardware implementation.
		@@ -1385,6 +1410,12 @@ static const struct user_regset x86_64_regsets[] = {
		.size = sizeof(long), .align = sizeof(long),
		.active = xfpregs_active, .get = xfpregs_get, .set = xfpregs_set
		},
		[REGSET_IOPERM64] = {
		.core_note_type = NT_386_IOPERM,
		.n = IO_BITMAP_LONGS,
		.size = sizeof(long), .align = sizeof(long),
		.active = ioperm_active, .get = ioperm_get
		},
		};

		static const struct user_regset_view user_x86_64_view = {
		@@ -1431,6 +1462,12 @@ static const struct user_regset x86_32_regsets[] = {
		.active = regset_tls_active,
		.get = regset_tls_get, .set = regset_tls_set
		},
		[REGSET_IOPERM32] = {
		.core_note_type = NT_386_IOPERM,
		.n = IO_BITMAP_BYTES / sizeof(u32),
		.size = sizeof(u32), .align = sizeof(u32),
		.active = ioperm_active, .get = ioperm_get
		},
		};

		static const struct user_regset_view user_x86_32_view = {

include/linux/elf.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -360,6 +360,7 @@ typedef struct elf64_shdr {
		#define NT_PPC_SPE 0x101 /* PowerPC SPE/EVR registers */
		#define NT_PPC_VSX 0x102 /* PowerPC VSX registers */
		#define NT_386_TLS 0x200 /* i386 TLS slots (struct user_desc) */
		#define NT_386_IOPERM 0x201 /* x86 io permission bitmap (1=deny) */


		/* Note header in a PT_NOTE section */

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