ARM: 5866/1: arm ptrace: use unsigned types for kernel pt_regs (092a4e95) · Commits · e / devices / android_kernel_fairphone_FP5

Make registers unsigned for kernel space. This is important for example in the perf events where the PC is stored into a u64. We don't want it sign extended so make the regs unsigned to prevent casts throughout the kernel. Signed-off-by:

Jamie Iles <jamie.iles@picochip.com> Signed-off-by:

Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/include/asm/ptrace.h

+6 −0

Original line number	Original line	Diff line number	Diff line
	@@ -97,9 +97,15 @@
	* stack during a system call. Note that sizeof(struct pt_regs)		* stack during a system call. Note that sizeof(struct pt_regs)
	* has to be a multiple of 8.		* has to be a multiple of 8.
	*/		*/
			#ifndef __KERNEL__
	struct pt_regs {		struct pt_regs {
	long uregs[18];		long uregs[18];
	};		};
			#else /* __KERNEL__ */
			struct pt_regs {
			unsigned long uregs[18];
			};
			#endif /* __KERNEL__ */

	#define ARM_cpsr uregs[16]		#define ARM_cpsr uregs[16]
	#define ARM_pc uregs[15]		#define ARM_pc uregs[15]