diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 4e689ad5f27cf771dde76b805231942f7888cc0b..bceeaf10c9d673ef1e7c945bce461eef64275954 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -48,6 +48,7 @@ config ARM64 select HAVE_PERF_EVENTS select HAVE_PERF_REGS select HAVE_PERF_USER_STACK_DUMP + select HAVE_SYSCALL_TRACEPOINTS select IRQ_DOMAIN select MODULES_USE_ELF_RELA select NO_BOOTMEM diff --git a/arch/arm64/include/asm/ftrace.h b/arch/arm64/include/asm/ftrace.h index 41e8670db20f6403a9d3616a56370da1f0ec326f..c5534facf9416fefbec606ad8f320f023f662ce7 100644 --- a/arch/arm64/include/asm/ftrace.h +++ b/arch/arm64/include/asm/ftrace.h @@ -17,6 +17,8 @@ #define MCOUNT_INSN_SIZE AARCH64_INSN_SIZE #ifndef __ASSEMBLY__ +#include + extern void _mcount(unsigned long); extern void *return_address(unsigned int); @@ -36,6 +38,22 @@ static inline unsigned long ftrace_call_adjust(unsigned long addr) } #define ftrace_return_address(n) return_address(n) + +/* + * Because AArch32 mode does not share the same syscall table with AArch64, + * tracing compat syscalls may result in reporting bogus syscalls or even + * hang-up, so just do not trace them. + * See kernel/trace/trace_syscalls.c + * + * x86 code says: + * If the user realy wants these, then they should use the + * raw syscall tracepoints with filtering. + */ +#define ARCH_TRACE_IGNORE_COMPAT_SYSCALLS +static inline bool arch_trace_is_compat_syscall(struct pt_regs *regs) +{ + return is_compat_task(); +} #endif /* ifndef __ASSEMBLY__ */ #endif /* __ASM_FTRACE_H */ diff --git a/arch/arm64/include/asm/syscall.h b/arch/arm64/include/asm/syscall.h index 70ba9d4ee9782503fa8c626dd3d405d5e36b93c4..383771eb0b87b5c540b49bf0553ff99e4ff907b8 100644 --- a/arch/arm64/include/asm/syscall.h +++ b/arch/arm64/include/asm/syscall.h @@ -18,6 +18,7 @@ #include +extern const void *sys_call_table[]; static inline int syscall_get_nr(struct task_struct *task, struct pt_regs *regs) diff --git a/arch/arm64/include/asm/unistd.h b/arch/arm64/include/asm/unistd.h index a4654c656a1eda3c07f682a8eda7acdfd8e18a31..e5f47df00c242d62ae867d17d3f2306789e0049a 100644 --- a/arch/arm64/include/asm/unistd.h +++ b/arch/arm64/include/asm/unistd.h @@ -29,3 +29,5 @@ #endif #define __ARCH_WANT_SYS_CLONE #include + +#define NR_syscalls (__NR_syscalls) diff --git a/arch/arm64/kernel/ptrace.c b/arch/arm64/kernel/ptrace.c index 32d52d3b079cca761cf0edaad4c74a2fca86115e..3e926b9c0641a7718f800d11156a87d9554bcb3c 100644 --- a/arch/arm64/kernel/ptrace.c +++ b/arch/arm64/kernel/ptrace.c @@ -42,6 +42,9 @@ #include #include +#define CREATE_TRACE_POINTS +#include + /* * TODO: does not yet catch signals sent when the child dies. * in exit.c or in signal.c. @@ -1093,11 +1096,17 @@ asmlinkage int syscall_trace_enter(struct pt_regs *regs) if (test_thread_flag(TIF_SYSCALL_TRACE)) tracehook_report_syscall(regs, PTRACE_SYSCALL_ENTER); + if (test_thread_flag(TIF_SYSCALL_TRACEPOINT)) + trace_sys_enter(regs, regs->syscallno); + return regs->syscallno; } asmlinkage void syscall_trace_exit(struct pt_regs *regs) { + if (test_thread_flag(TIF_SYSCALL_TRACEPOINT)) + trace_sys_exit(regs, regs_return_value(regs)); + if (test_thread_flag(TIF_SYSCALL_TRACE)) tracehook_report_syscall(regs, PTRACE_SYSCALL_EXIT); }