diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index f4157d4a0289e683b23fc423f023d7b5f50c3268..e2823362c324d479009ed6e209ad4bb810ac64c4 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -24,6 +24,7 @@ config ARM64 select ARCH_HAS_SG_CHAIN select ARCH_HAS_STRICT_KERNEL_RWX select ARCH_HAS_STRICT_MODULE_RWX + select ARCH_HAS_SYSCALL_WRAPPER select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST select ARCH_HAVE_NMI_SAFE_CMPXCHG select ARCH_INLINE_READ_LOCK if !PREEMPT diff --git a/arch/arm64/include/asm/syscall.h b/arch/arm64/include/asm/syscall.h index b83d0e6980a3e15a0f8b6ebea654bebc71184421..ad8be16a39c9d18bdbd406f522c02432529c4cf6 100644 --- a/arch/arm64/include/asm/syscall.h +++ b/arch/arm64/include/asm/syscall.h @@ -20,9 +20,7 @@ #include #include -typedef long (*syscall_fn_t)(unsigned long, unsigned long, - unsigned long, unsigned long, - unsigned long, unsigned long); +typedef long (*syscall_fn_t)(struct pt_regs *regs); extern const syscall_fn_t sys_call_table[]; diff --git a/arch/arm64/include/asm/syscall_wrapper.h b/arch/arm64/include/asm/syscall_wrapper.h new file mode 100644 index 0000000000000000000000000000000000000000..a4477e515b798d3788c210ac184f9284e059e989 --- /dev/null +++ b/arch/arm64/include/asm/syscall_wrapper.h @@ -0,0 +1,80 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * syscall_wrapper.h - arm64 specific wrappers to syscall definitions + * + * Based on arch/x86/include/asm_syscall_wrapper.h + */ + +#ifndef __ASM_SYSCALL_WRAPPER_H +#define __ASM_SYSCALL_WRAPPER_H + +#define SC_ARM64_REGS_TO_ARGS(x, ...) \ + __MAP(x,__SC_ARGS \ + ,,regs->regs[0],,regs->regs[1],,regs->regs[2] \ + ,,regs->regs[3],,regs->regs[4],,regs->regs[5]) + +#ifdef CONFIG_COMPAT + +#define COMPAT_SYSCALL_DEFINEx(x, name, ...) \ + asmlinkage long __arm64_compat_sys##name(const struct pt_regs *regs); \ + ALLOW_ERROR_INJECTION(__arm64_compat_sys##name, ERRNO); \ + static long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \ + static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \ + asmlinkage long __arm64_compat_sys##name(const struct pt_regs *regs) \ + { \ + return __se_compat_sys##name(SC_ARM64_REGS_TO_ARGS(x,__VA_ARGS__)); \ + } \ + static long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \ + { \ + return __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__)); \ + } \ + static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) + +#define COMPAT_SYSCALL_DEFINE0(sname) \ + asmlinkage long __arm64_compat_sys_##sname(void); \ + ALLOW_ERROR_INJECTION(__arm64_compat_sys_##sname, ERRNO); \ + asmlinkage long __arm64_compat_sys_##sname(void) + +#define COND_SYSCALL_COMPAT(name) \ + cond_syscall(__arm64_compat_sys_##name); + +#define COMPAT_SYS_NI(name) \ + SYSCALL_ALIAS(__arm64_compat_sys_##name, sys_ni_posix_timers); + +#endif /* CONFIG_COMPAT */ + +#define __SYSCALL_DEFINEx(x, name, ...) \ + asmlinkage long __arm64_sys##name(const struct pt_regs *regs); \ + ALLOW_ERROR_INJECTION(__arm64_sys##name, ERRNO); \ + static long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \ + static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \ + asmlinkage long __arm64_sys##name(const struct pt_regs *regs) \ + { \ + return __se_sys##name(SC_ARM64_REGS_TO_ARGS(x,__VA_ARGS__)); \ + } \ + static long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \ + { \ + long ret = __do_sys##name(__MAP(x,__SC_CAST,__VA_ARGS__)); \ + __MAP(x,__SC_TEST,__VA_ARGS__); \ + __PROTECT(x, ret,__MAP(x,__SC_ARGS,__VA_ARGS__)); \ + return ret; \ + } \ + static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) + +#ifndef SYSCALL_DEFINE0 +#define SYSCALL_DEFINE0(sname) \ + SYSCALL_METADATA(_##sname, 0); \ + asmlinkage long __arm64_sys_##sname(void); \ + ALLOW_ERROR_INJECTION(__arm64_sys_##sname, ERRNO); \ + asmlinkage long __arm64_sys_##sname(void) +#endif + +#ifndef COND_SYSCALL +#define COND_SYSCALL(name) cond_syscall(__arm64_sys_##name) +#endif + +#ifndef SYS_NI +#define SYS_NI(name) SYSCALL_ALIAS(__arm64_sys_##name, sys_ni_posix_timers); +#endif + +#endif /* __ASM_SYSCALL_WRAPPER_H */ diff --git a/arch/arm64/kernel/sys.c b/arch/arm64/kernel/sys.c index f249d9735f4c1001d423ec6dc77f554432eaf522..b44065fb16160c62d3fa113d0a86f1dd1e4564dc 100644 --- a/arch/arm64/kernel/sys.c +++ b/arch/arm64/kernel/sys.c @@ -50,11 +50,17 @@ SYSCALL_DEFINE1(arm64_personality, unsigned int, personality) /* * Wrappers to pass the pt_regs argument. */ -asmlinkage long sys_rt_sigreturn(void); #define sys_personality sys_arm64_personality +asmlinkage long sys_ni_syscall(const struct pt_regs *); +#define __arm64_sys_ni_syscall sys_ni_syscall + +#undef __SYSCALL +#define __SYSCALL(nr, sym) asmlinkage long __arm64_##sym(const struct pt_regs *); +#include + #undef __SYSCALL -#define __SYSCALL(nr, sym) [nr] = (syscall_fn_t)sym, +#define __SYSCALL(nr, sym) [nr] = (syscall_fn_t)__arm64_##sym, const syscall_fn_t sys_call_table[__NR_syscalls] = { [0 ... __NR_syscalls - 1] = (syscall_fn_t)sys_ni_syscall, diff --git a/arch/arm64/kernel/sys32.c b/arch/arm64/kernel/sys32.c index a205d4ff47762a834289033bac46ad08b11e848c..0f8bcb7de70086edecc3da67b70b8a126f28ded7 100644 --- a/arch/arm64/kernel/sys32.c +++ b/arch/arm64/kernel/sys32.c @@ -133,8 +133,15 @@ COMPAT_SYSCALL_DEFINE6(aarch32_fallocate, int, fd, int, mode, return ksys_fallocate(fd, mode, arg_u64(offset), arg_u64(len)); } +asmlinkage long sys_ni_syscall(const struct pt_regs *); +#define __arm64_sys_ni_syscall sys_ni_syscall + +#undef __SYSCALL +#define __SYSCALL(nr, sym) asmlinkage long __arm64_##sym(const struct pt_regs *); +#include + #undef __SYSCALL -#define __SYSCALL(nr, sym) [nr] = (syscall_fn_t)sym, +#define __SYSCALL(nr, sym) [nr] = (syscall_fn_t)__arm64_##sym, const syscall_fn_t compat_sys_call_table[__NR_compat_syscalls] = { [0 ... __NR_compat_syscalls - 1] = (syscall_fn_t)sys_ni_syscall, diff --git a/arch/arm64/kernel/syscall.c b/arch/arm64/kernel/syscall.c index 7ff2d7b9f517a0b6f138337c7d28b9bfeeac5b87..be00c85794db558596529ced403ad64b8e506607 100644 --- a/arch/arm64/kernel/syscall.c +++ b/arch/arm64/kernel/syscall.c @@ -15,6 +15,8 @@ long compat_arm_syscall(struct pt_regs *regs); +long sys_ni_syscall(void); + asmlinkage long do_ni_syscall(struct pt_regs *regs) { #ifdef CONFIG_COMPAT @@ -31,8 +33,7 @@ asmlinkage long do_ni_syscall(struct pt_regs *regs) static long __invoke_syscall(struct pt_regs *regs, syscall_fn_t syscall_fn) { - return syscall_fn(regs->regs[0], regs->regs[1], regs->regs[2], - regs->regs[3], regs->regs[4], regs->regs[5]); + return syscall_fn(regs); } static void invoke_syscall(struct pt_regs *regs, unsigned int scno,