Signed-off-by: WANG Xuerui <g...@xen0n.name>
Reviewed-by: Richard Henderson <richard.hender...@linaro.org>
---
accel/tcg/user-exec.c | 73 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 73 insertions(+)
diff --git a/accel/tcg/user-exec.c b/accel/tcg/user-exec.c
index 8fed542622..38d4ad8a7d 100644
--- a/accel/tcg/user-exec.c
+++ b/accel/tcg/user-exec.c
@@ -878,6 +878,79 @@ int cpu_signal_handler(int host_signum, void *pinfo,
return handle_cpu_signal(pc, info, is_write, &uc->uc_sigmask);
}
+#elif defined(__loongarch64)
+
+int cpu_signal_handler(int host_signum, void *pinfo,
+ void *puc)
+{
+ siginfo_t *info = pinfo;
+ ucontext_t *uc = puc;
+ greg_t pc = uc->uc_mcontext.__pc;
+ uint32_t insn = *(uint32_t *)pc;
+ int is_write = 0;
+
+ /* Detect store by reading the instruction at the program counter. */
+ switch ((insn >> 26) & 0b111111) {
+ case 0b001000: /* {ll,sc}.[wd] */
+ switch ((insn >> 24) & 0b11) {
+ case 0b01: /* sc.w */
+ case 0b11: /* sc.d */
+ is_write = 1;
+ break;
+ }
+ break;
+ case 0b001001: /* {ld,st}ox4.[wd] ({ld,st}ptr.[wd]) */
+ switch ((insn >> 24) & 0b11) {
+ case 0b01: /* stox4.w (stptr.w) */
+ case 0b11: /* stox4.d (stptr.d) */
+ is_write = 1;
+ break;
+ }
+ break;
+ case 0b001010: /* {ld,st}.* family */
+ switch ((insn >> 22) & 0b1111) {
+ case 0b0100: /* st.b */
+ case 0b0101: /* st.h */
+ case 0b0110: /* st.w */
+ case 0b0111: /* st.d */
+ case 0b1101: /* fst.s */
+ case 0b1111: /* fst.d */
+ is_write = 1;
+ break;
+ }
+ break;
+ case 0b001110: /* indexed, atomic, bounds-checking memory operations */
+ uint32_t sel = (insn >> 15) & 0b11111111111;
+
+ switch (sel) {
+ case 0b00000100000: /* stx.b */
+ case 0b00000101000: /* stx.h */
+ case 0b00000110000: /* stx.w */
+ case 0b00000111000: /* stx.d */
+ case 0b00001110000: /* fstx.s */
+ case 0b00001111000: /* fstx.d */
+ case 0b00011101100: /* fstgt.s */
+ case 0b00011101101: /* fstgt.d */
+ case 0b00011101110: /* fstle.s */
+ case 0b00011101111: /* fstle.d */
+ case 0b00011111000: /* stgt.b */
+ case 0b00011111001: /* stgt.h */
+ case 0b00011111010: /* stgt.w */
+ case 0b00011111011: /* stgt.d */
+ case 0b00011111100: /* stle.b */
+ case 0b00011111101: /* stle.h */
+ case 0b00011111110: /* stle.w */
+ case 0b00011111111: /* stle.d */
+ case 0b00011000000 ... 0b00011100011: /* am* insns */
+ is_write = 1;
+ break;
+ }
+ break;
+ }
+
+ return handle_cpu_signal(pc, info, is_write, &uc->uc_sigmask);
+}
+
#else
#error host CPU specific signal handler needed
--
2.33.0
