I78 user state #140
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I78 user state #140
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… to pass a 64bit val from set() to bind(); initialized more of the invocation buf, this is likely at the wrong place
…k for the state frame to stay below 4KiB
…ew thread state address if the frame was changed while the EC was loaded
… to pass a 64bit val from set() to bind(); initialized more of the invocation buf, this is likely at the wrong place
…k for the state frame to stay below 4KiB
…ew thread state address if the frame was changed while the EC was loaded
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Feb 29, 2020
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Creating pthreads works again. However, not all of the allocated kernel objects are deleted after the thread has finished. |
…n in EC::setFlagsSuspend
kubanrob
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Mar 5, 2020
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Looks good, compiles, haven't tested it ... I added some comments for nitpicking.
| { | ||
| MLOG_INFO(mlog::ec, "EC setEntryPoint", DVARhex(rip)); | ||
| threadState.rip = rip; | ||
| if (!state) return; |
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This might need a return value if it can fail.
Comment on lines
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| if (state) { | ||
| state->threadState.fs_base = fs; | ||
| state->threadState.gs_base = gs; | ||
| } |
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We might want to return an error code to our unsuspecting user.
| void ExecutionContext::handleTrap() | ||
| { | ||
| auto ctx = &threadState; | ||
| auto ctx = &state->threadState; |
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Are we sure that state != nullptr?
| getLocalPlace().setCR3(info.table); // without reload if not changed | ||
| } | ||
| // Reload the address space and thread state address if they have changed | ||
| getLocalPlace().setCR3(page_table); // without reload if not changed |
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We should be very careful never to set CR3 to nullptr. Maybe assert page_table != nullptr or at least use the default/fallback system PML4 as a "null" value.
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Store state of execution contexts in user accessible memory frames. This includes the CPU and FPU registers. The objective is to enable easier access to suspended threads for user-mode trap handlers and thread management.
Integration into the musl pthreads support code is still pending.