diff options
| -rw-r--r-- | sys/cddl/dev/dtrace/riscv/dtrace_subr.c | 21 |
1 files changed, 16 insertions, 5 deletions
diff --git a/sys/cddl/dev/dtrace/riscv/dtrace_subr.c b/sys/cddl/dev/dtrace/riscv/dtrace_subr.c index 1e24a88f6c75..f32bb3a2343e 100644 --- a/sys/cddl/dev/dtrace/riscv/dtrace_subr.c +++ b/sys/cddl/dev/dtrace/riscv/dtrace_subr.c @@ -63,6 +63,8 @@ typedef struct dtrace_invop_hdlr { dtrace_invop_hdlr_t *dtrace_invop_hdlr; +static int match_opcode(uint32_t insn, int match, int mask); + int dtrace_invop(uintptr_t addr, struct trapframe *frame) { @@ -188,6 +190,8 @@ dtrace_gethrestime(void) int dtrace_trap(struct trapframe *frame, u_int type) { + uint16_t insn; + /* * A trap can occur while DTrace executes a probe. Before * executing the probe, DTrace blocks re-scheduling and sets @@ -196,9 +200,7 @@ dtrace_trap(struct trapframe *frame, u_int type) * flag is cleared and finally re-scheduling is enabled. * * Check if DTrace has enabled 'no-fault' mode: - * */ - if ((cpu_core[curcpu].cpuc_dtrace_flags & CPU_DTRACE_NOFAULT) != 0) { /* * There are only a couple of trap types that are expected. @@ -208,15 +210,24 @@ dtrace_trap(struct trapframe *frame, u_int type) case SCAUSE_LOAD_ACCESS_FAULT: case SCAUSE_STORE_ACCESS_FAULT: case SCAUSE_INST_ACCESS_FAULT: + case SCAUSE_INST_PAGE_FAULT: + case SCAUSE_LOAD_PAGE_FAULT: + case SCAUSE_STORE_PAGE_FAULT: /* Flag a bad address. */ cpu_core[curcpu].cpuc_dtrace_flags |= CPU_DTRACE_BADADDR; - cpu_core[curcpu].cpuc_dtrace_illval = 0; + cpu_core[curcpu].cpuc_dtrace_illval = frame->tf_stval; /* * Offset the instruction pointer to the instruction - * following the one causing the fault. + * following the one causing the fault. Check if the + * instruction is compressed or not. Standard + * instructions always have bits [1:0] == 11. */ - frame->tf_sepc += 4; + insn = *(uint16_t *)frame->tf_sepc; + if (match_opcode(insn, 0x3, 0x3)) + frame->tf_sepc += INSN_SIZE; + else + frame->tf_sepc += INSN_C_SIZE; return (1); default: |