On 25/6/23 23:27, Yeqi Fu wrote:
Upon encountering specialized instructions reserved for native calls,
store the function id and argument types, then invoke helper.
Signed-off-by: Yeqi Fu <fufuyqqq...@gmail.com>
---
target/mips/tcg/translate.c | 26 ++++++++++++++++++++++++++
target/mips/tcg/translate.h | 2 ++
2 files changed, 28 insertions(+)
diff --git a/target/mips/tcg/translate.c b/target/mips/tcg/translate.c
index a6ca2e5a3b..15ab889dca 100644
--- a/target/mips/tcg/translate.c
+++ b/target/mips/tcg/translate.c
@@ -36,6 +36,7 @@
#include "qemu/qemu-print.h"
#include "fpu_helper.h"
#include "translate.h"
+#include "native/native-defs.h"
/*
* Many sysemu-only helpers are not reachable for user-only.
@@ -13592,6 +13593,31 @@ static void decode_opc_special(CPUMIPSState *env,
DisasContext *ctx)
#endif
break;
case OPC_SYSCALL:
+ uint32_t sig = (ctx->opcode) >> 6;
if (native_call_enabled() && sig) {
if (ctx->native_call_status) {
...
} else {
...
}
break;
}
+ if (native_call_enabled() && (!ctx->native_call_status) && sig) {
+ ctx->native_call_status = true;
+ ctx->native_call_id = sig;
+ break;
+ } else if (native_call_enabled() && (ctx->native_call_status) && sig) {
+ TCGv arg1 = tcg_temp_new();
+ TCGv arg2 = tcg_temp_new();
+ TCGv arg3 = tcg_temp_new();
+
+ tcg_gen_mov_tl(arg1, cpu_gpr[4]);
+ tcg_gen_mov_tl(arg2, cpu_gpr[5]);
+ tcg_gen_mov_tl(arg3, cpu_gpr[6]);
+
+ TCGv_i32 abi_map = tcg_constant_i32(sig);
+ TCGv_i32 func_id = tcg_constant_i32(ctx->native_call_id);
+ TCGv res = tcg_temp_new();
+ TCGv_i32 mmu_idx = tcg_constant_i32(MMU_USER_IDX);
+ gen_helper_native_call(res, cpu_env, arg1, arg2, arg3,
+ abi_map, func_id, mmu_idx);
+ tcg_gen_mov_tl(cpu_gpr[2], res);
+ ctx->native_call_status = false;
+ ctx->native_call_id = 0;
+ break;
+ }
generate_exception_end(ctx, EXCP_SYSCALL);
break;
case OPC_BREAK:
