Commit efe75c49 authored by David Abdurachmanov's avatar David Abdurachmanov Committed by Palmer Dabbelt

riscv: add audit support

On RISC-V (riscv) audit is supported through generic lib/audit.c.
The patch adds required arch specific definitions.
Signed-off-by: default avatarDavid Abdurachmanov <david.abdurachmanov@gmail.com>
Signed-off-by: default avatarPalmer Dabbelt <palmer@sifive.com>
parent 8fe28cb5
......@@ -28,6 +28,7 @@ config RISCV
select GENERIC_STRNLEN_USER
select GENERIC_SMP_IDLE_THREAD
select GENERIC_ATOMIC64 if !64BIT || !RISCV_ISA_A
select HAVE_ARCH_AUDITSYSCALL
select HAVE_MEMBLOCK_NODE_MAP
select HAVE_DMA_CONTIGUOUS
select HAVE_FUTEX_CMPXCHG if FUTEX
......
......@@ -113,6 +113,11 @@ static inline void frame_pointer_set(struct pt_regs *regs,
SET_FP(regs, val);
}
static inline unsigned long regs_return_value(struct pt_regs *regs)
{
return regs->a0;
}
#endif /* __ASSEMBLY__ */
#endif /* _ASM_RISCV_PTRACE_H */
......@@ -18,6 +18,7 @@
#ifndef _ASM_RISCV_SYSCALL_H
#define _ASM_RISCV_SYSCALL_H
#include <uapi/linux/audit.h>
#include <linux/sched.h>
#include <linux/err.h>
......@@ -99,4 +100,13 @@ static inline void syscall_set_arguments(struct task_struct *task,
memcpy(&regs->a1 + i * sizeof(regs->a1), args, n * sizeof(regs->a0));
}
static inline int syscall_get_arch(void)
{
#ifdef CONFIG_64BIT
return AUDIT_ARCH_RISCV64;
#else
return AUDIT_ARCH_RISCV32;
#endif
}
#endif /* _ASM_RISCV_SYSCALL_H */
......@@ -80,13 +80,19 @@ struct thread_info {
#define TIF_RESTORE_SIGMASK 4 /* restore signal mask in do_signal() */
#define TIF_MEMDIE 5 /* is terminating due to OOM killer */
#define TIF_SYSCALL_TRACEPOINT 6 /* syscall tracepoint instrumentation */
#define TIF_SYSCALL_AUDIT 7 /* syscall auditing */
#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
#define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT)
#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
#define _TIF_WORK_MASK \
(_TIF_NOTIFY_RESUME | _TIF_SIGPENDING | _TIF_NEED_RESCHED)
#define _TIF_SYSCALL_WORK \
(_TIF_SYSCALL_TRACE | _TIF_SYSCALL_TRACEPOINT | _TIF_SYSCALL_AUDIT)
#endif /* _ASM_RISCV_THREAD_INFO_H */
......@@ -201,7 +201,7 @@ handle_syscall:
REG_S s2, PT_SEPC(sp)
/* Trace syscalls, but only if requested by the user. */
REG_L t0, TASK_TI_FLAGS(tp)
andi t0, t0, _TIF_SYSCALL_TRACE
andi t0, t0, _TIF_SYSCALL_WORK
bnez t0, handle_syscall_trace_enter
check_syscall_nr:
/* Check to make sure we don't jump to a bogus syscall number. */
......@@ -221,7 +221,7 @@ ret_from_syscall:
REG_S a0, PT_A0(sp)
/* Trace syscalls, but only if requested by the user. */
REG_L t0, TASK_TI_FLAGS(tp)
andi t0, t0, _TIF_SYSCALL_TRACE
andi t0, t0, _TIF_SYSCALL_WORK
bnez t0, handle_syscall_trace_exit
ret_from_exception:
......
......@@ -399,6 +399,8 @@ enum {
/* do not define AUDIT_ARCH_PPCLE since it is not supported by audit */
#define AUDIT_ARCH_PPC64 (EM_PPC64|__AUDIT_ARCH_64BIT)
#define AUDIT_ARCH_PPC64LE (EM_PPC64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_RISCV32 (EM_RISCV|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_RISCV64 (EM_RISCV|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_S390 (EM_S390)
#define AUDIT_ARCH_S390X (EM_S390|__AUDIT_ARCH_64BIT)
#define AUDIT_ARCH_SH (EM_SH)
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment