h8300: generic kernel_execve() (5fae1b66) · Commits · 戴 / test

arch/h8300/Kconfig

+1 −0

Original line number	Diff line number	Diff line
		@@ -9,6 +9,7 @@ config H8300
		select GENERIC_CPU_DEVICES
		select MODULES_USE_ELF_RELA
		select GENERIC_KERNEL_THREAD
		select GENERIC_KERNEL_EXECVE

		config SYMBOL_PREFIX
		string

+1 −2

Original line number	Diff line number	Diff line
		@@ -337,8 +337,7 @@ SYMBOL_NAME_LABEL(ret_from_kernel_thread)
		mov.l @(LER4:16,sp),er0
		mov.l @(LER5:16,sp),er1
		jsr @er1
		sub.l @er0,@er0
		jsr @SYMBOL_NAME(sys_exit)
		jmp @SYMBOL_NAME(ret_from_exception)

		SYMBOL_NAME_LABEL(resume)
		/*

+0 −26

Original line number	Diff line number	Diff line
		@@ -46,29 +46,3 @@ asmlinkage void syscall_print(void *dummy,...)
		((regs->pc)&0xffffff)-2,regs->orig_er0,regs->er1,regs->er2,regs->er3,regs->er0);
		}
		#endif

		/*
		* Do a system call from kernel instead of calling sys_execve so we
		* end up with proper pt_regs.
		*/
		asmlinkage
		int kernel_execve(const char *filename,
		const char *const argv[],
		const char *const envp[])
		{
		register long res __asm__("er0");
		register const char const _c __asm__("er3") = envp;
		register const char const _b __asm__("er2") = argv;
		register const char * _a __asm__("er1") = filename;
		__asm__ __volatile__ ("mov.l %1,er0\n\t"
		"trapa #0\n\t"
		: "=r" (res)
		: "g" (__NR_execve),
		"g" (_a),
		"g" (_b),
		"g" (_c)
		: "cc", "memory");
		return res;
		}