well, it doesn't give errors, but warnings because of unsigned longs being converted to TCGv_i64, which exact definiton I cannot find in the qemu repo. Where is it located? When stepping through the instructions' code, the value that should be read isn't read. Maybe that'll work when fixing the warnings.
Regards Am Sa., 1. Okt. 2022 um 22:23 Uhr schrieb Richard Henderson < richard.hender...@linaro.org>: > On 10/1/22 13:10, BitFriends wrote: > > Hello, > > > > I am trying to create a custom instruction that accesses guest memory > specified by an > > address in a register. I specifically want to read from that address. So > I tried to do > > that using "tcg_gen_qemu_ld_i64(&res, env->regs[R_EDI], 0, MO_LEUQ);", > but that doesn't > > save any result in res. > > This statement should have given you compilation errors, so I don't know > what you mean by > "doesn't save any result". There's clearly a disconnect between what you > describe and > what you actually attempted. > > Anyway, by the name you can see that function "gen"erates a "tcg" > operation, which is then > later compiled by the jit, the output of which is later executed to > produce a result. > Which is, in general, what you want for implementing a custom instruction. > > > r~ >
