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| author | Kimplul <kimi.h.kuparinen@gmail.com> | 2022-09-14 21:30:11 +0300 |
|---|---|---|
| committer | Kimplul <kimi.h.kuparinen@gmail.com> | 2022-09-14 21:30:11 +0300 |
| commit | cabbf335824db0df835e4c541c19d3803ce38454 (patch) | |
| tree | e7397d2b6637545b8e18f26135e3ad2a0a2fbe1e /arch/riscv64/kernel/entry.S | |
| parent | 025778e89e7d0fe3cd1ad53537c9cc6f3cd819cc (diff) | |
| download | kmi-cabbf335824db0df835e4c541c19d3803ce38454.tar.gz kmi-cabbf335824db0df835e4c541c19d3803ce38454.zip | |
add canary to kernel stack
Diffstat (limited to 'arch/riscv64/kernel/entry.S')
| -rw-r--r-- | arch/riscv64/kernel/entry.S | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/riscv64/kernel/entry.S b/arch/riscv64/kernel/entry.S index 9c7a54c..7301d4e 100644 --- a/arch/riscv64/kernel/entry.S +++ b/arch/riscv64/kernel/entry.S @@ -29,7 +29,8 @@ _save_context: mv sp, tp /* move thread pointer back */ - csrrw tp, CSR_SSCRATCH, tp + addi tp, tp, sizeof_registers + csrrw tp, CSR_SSCRATCH, tp /* save registers */ sr ra, offsetof_ra(sp) @@ -77,6 +78,7 @@ _save_context: handle_exception: li t0, EXC_SYSCALL /* system exceptions fall through, syscalls jump */ + /* temp, at some point we want to handle system exceptions as well */ beq s4, t0, handle_syscall j restore_all |