diff options
Diffstat (limited to 'x86_64')
| -rw-r--r-- | x86_64/interrupt.S | 2 | ||||
| -rw-r--r-- | x86_64/locore.S | 8 |
2 files changed, 8 insertions, 2 deletions
diff --git a/x86_64/interrupt.S b/x86_64/interrupt.S index 56cd771b..110a429c 100644 --- a/x86_64/interrupt.S +++ b/x86_64/interrupt.S @@ -29,6 +29,8 @@ * Generic interrupt handler. * * On entry, %eax contains the irq number. + * + * Note: kdb_kintr needs to know our stack usage */ #define S_REGS 24(%rsp) diff --git a/x86_64/locore.S b/x86_64/locore.S index f677aed1..0833da06 100644 --- a/x86_64/locore.S +++ b/x86_64/locore.S @@ -839,6 +839,8 @@ ast_from_interrupt: * * frame-> saved %rbp * return address in interrupt handler + * saved SPL + * saved IRQ * return address == return_to_iret_i * saved %r11 * saved %r10 @@ -878,7 +880,7 @@ ast_from_interrupt: * Call kdb, passing it that register save area. */ -#define RET_OFFSET 16 +#define RET_OFFSET 32 ENTRY(kdb_kintr) @@ -892,7 +894,9 @@ ENTRY(kdb_kintr) cmpq RET_OFFSET(%rax),%rdx /* interrupt handler (2)? */ je 2f /* if not: */ movq (%rax),%rax /* try next frame */ - jmp 0b + testl %rax,%rax + jnz 0b + ud2 /* oops, didn't find frame, fix me :/ */ 1: movq $kdb_from_iret,RET_OFFSET(%rax) ret /* returns to kernel/user stack */ |