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| author | Kimplul <kimi.h.kuparinen@gmail.com> | 2022-05-21 21:02:17 +0300 |
|---|---|---|
| committer | Kimplul <kimi.h.kuparinen@gmail.com> | 2022-05-21 21:02:17 +0300 |
| commit | 8da0171e5ca3492cdb34422184a1c96acd0b5165 (patch) | |
| tree | c125b7286f929c8ff7f8a2b938cec84328e99de4 /arch/riscv64/kernel/entry.S | |
| parent | 836026dbba64793afc0d2591ffdb6fb39b696977 (diff) | |
| download | kmi-8da0171e5ca3492cdb34422184a1c96acd0b5165.tar.gz kmi-8da0171e5ca3492cdb34422184a1c96acd0b5165.zip | |
add status info to memory mappings
+ next up would probably be to start working on process/thread
relationships, largely as documented. Still not entirely sure about
how I want to handle fork, but I suppose I might figure it out at some
point.
Diffstat (limited to 'arch/riscv64/kernel/entry.S')
| -rw-r--r-- | arch/riscv64/kernel/entry.S | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/riscv64/kernel/entry.S b/arch/riscv64/kernel/entry.S index 0ff1a69..7f697b5 100644 --- a/arch/riscv64/kernel/entry.S +++ b/arch/riscv64/kernel/entry.S @@ -74,8 +74,11 @@ handle_exception: j restore_all handle_syscall: - /* TODO: CSR_EPC should be moved forward one instruction when dealing - * with syscalls */ + /* add 4 (size of ecall) to EPC to avoid running the same instruction + * twice */ + csrr s0, CSR_SEPC + addi s0, s0, 4 + csrw CSR_SEPC, s0 jal syscall_dispatch /* if we had a thread switch, load kernel stack of current thread and * restore its context */ |