diff options
| author | Ian Moffett <ian@osmora.org> | 2025-11-15 18:52:55 -0500 |
|---|---|---|
| committer | Ian Moffett <ian@osmora.org> | 2025-11-15 18:52:55 -0500 |
| commit | 53e2489b201d84ed5d9fc8bcdd65551bb6b43b9a (patch) | |
| tree | 53c5a7520fd1052954252aa6ad6810108ced410c /sys/arch/amd64/cpu | |
| parent | e1773e18239e642ae97e5dd48bbad6d3c5ffccba (diff) | |
kern/amd64: cpu: Add kernel fence for trap entry
A kernel fence ensures that the GS base will contain kernel data on
entry.
Signed-off-by: Ian Moffett <ian@osmora.org>
Diffstat (limited to 'sys/arch/amd64/cpu')
| -rw-r--r-- | sys/arch/amd64/cpu/idt.S | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/sys/arch/amd64/cpu/idt.S b/sys/arch/amd64/cpu/idt.S index a5a4a73..b7169d8 100644 --- a/sys/arch/amd64/cpu/idt.S +++ b/sys/arch/amd64/cpu/idt.S @@ -27,6 +27,8 @@ * POSSIBILITY OF SUCH DAMAGE. */ +#include <md/kfence.h> + #define KERNEL_CS 0x08 #define INT_GATE 0x8E @@ -152,127 +154,155 @@ set_traps: retq diverr: + KFENCE push_frame 0x0 mov %rsp, %rdi call trap_dispatch pop_frame 0x0 + KFENCE 1: cli hlt jmp 1b debug_except: + KFENCE push_frame 0x1 mov %rsp, %rdi call trap_dispatch pop_frame 0x1 + KFENCE 1: cli hlt jmp 1b nmi: + KFENCE push_frame 0x2 mov %rsp, %rdi call trap_dispatch pop_frame 0x2 + KFENCE 1: cli hlt jmp 1b breakpoint: + KFENCE push_frame 0x3 mov %rsp, %rdi call trap_dispatch pop_frame 0x3 + KFENCE 1: cli hlt jmp 1b overflow: + KFENCE push_frame 0x4 mov %rsp, %rdi call trap_dispatch pop_frame 0x4 + KFENCE 1: cli hlt jmp 1b bound_range: + KFENCE push_frame 0x5 mov %rsp, %rdi call trap_dispatch pop_frame 0x5 + KFENCE 1: cli hlt jmp 1b invl_opc: + KFENCE push_frame 0x6 mov %rsp, %rdi call trap_dispatch pop_frame 0x6 + KFENCE 1: cli hlt jmp 1b no_coproc: + KFENCE push_frame 0x7 mov %rsp, %rdi call trap_dispatch pop_frame 0x7 + KFENCE 1: cli hlt jmp 1b double_fault: + KFENCE_EC push_frame 0x8 mov %rsp, %rdi call trap_dispatch pop_frame 0x8 + KFENCE_EC 1: cli hlt jmp 1b invalid_tss: + KFENCE_EC push_frame 0xA mov %rsp, %rdi call trap_dispatch pop_frame 0xA + KFENCE_EC 1: cli hlt jmp 1b seg_np: + KFENCE_EC push_frame 0xB mov %rsp, %rdi call trap_dispatch pop_frame 0xB + KFENCE_EC 1: cli hlt jmp 1b ss_fault: + KFENCE_EC push_frame 0xC mov %rsp, %rdi call trap_dispatch pop_frame 0xC + KFENCE_EC 1: cli hlt jmp 1b gpf: + KFENCE_EC push_frame 0xD mov %rsp, %rdi call trap_dispatch pop_frame 0xD + KFENCE_EC 1: cli hlt jmp 1b page_fault: + KFENCE_EC push_frame 0xE mov %rsp, %rdi call trap_dispatch pop_frame 0xE + KFENCE_EC 1: cli hlt jmp 1b |