diff options
Diffstat (limited to 'runtime/loc2c-runtime.h')
| -rw-r--r-- | runtime/loc2c-runtime.h | 62 |
1 files changed, 36 insertions, 26 deletions
diff --git a/runtime/loc2c-runtime.h b/runtime/loc2c-runtime.h index 4177b8a2..ba4dec30 100644 --- a/runtime/loc2c-runtime.h +++ b/runtime/loc2c-runtime.h @@ -25,39 +25,49 @@ /* These operations are target-specific. */ #include <asm/uaccess.h> -#define fetch_register(regno) ((intptr_t) c->regs->dwarf_register_##regno) +#define fetch_register(regno) \ + ((intptr_t) dwarf_register_##regno (c->regs)) #define store_register(regno, value) \ - (c->regs->dwarf_register_##regno = (value)) + (dwarf_register_##regno (c->regs) = (value)) #if defined __i386__ -#define dwarf_register_0 eax -#define dwarf_register_1 ecx -#define dwarf_register_2 edx -#define dwarf_register_3 ebx -#define dwarf_register_4 esp -#define dwarf_register_5 ebp -#define dwarf_register_6 esi -#define dwarf_register_7 edi +/* The stack pointer is unlike other registers. When a trap happens in + kernel mode, it is not saved in the trap frame (struct pt_regs). + The `esp' (and `xss') fields are valid only for a user-mode trap. + For a kernel mode trap, the interrupted state's esp is actually an + address inside where the `struct pt_regs' on the kernel trap stack points. + + For now we assume all traps are from kprobes in kernel-mode code. + For extra paranoia, could do BUG_ON((regs->xcs & 3) == 3). */ + +#define dwarf_register_0(regs) regs->eax +#define dwarf_register_1(regs) regs->ecx +#define dwarf_register_2(regs) regs->edx +#define dwarf_register_3(regs) regs->ebx +#define dwarf_register_4(regs) ((long) ®s->esp) +#define dwarf_register_5(regs) regs->ebp +#define dwarf_register_6(regs) regs->esi +#define dwarf_register_7(regs) regs->edi #elif defined __x86_64__ -#define dwarf_register_0 eax -#define dwarf_register_1 edx -#define dwarf_register_2 ecx -#define dwarf_register_3 ebx -#define dwarf_register_4 esi -#define dwarf_register_5 edi -#define dwarf_register_6 ebp -#define dwarf_register_7 esp -#define dwarf_register_8 r8 -#define dwarf_register_9 r9 -#define dwarf_register_10 r10 -#define dwarf_register_11 r11 -#define dwarf_register_12 r12 -#define dwarf_register_13 r13 -#define dwarf_register_14 r14 -#define dwarf_register_15 r15 +#define dwarf_register_0(regs) regs->rax +#define dwarf_register_1(regs) regs->rdx +#define dwarf_register_2(regs) regs->rcx +#define dwarf_register_3(regs) regs->rbx +#define dwarf_register_4(regs) regs->rsi +#define dwarf_register_5(regs) regs->rdi +#define dwarf_register_6(regs) regs->rbp +#define dwarf_register_7(regs) regs->rsp +#define dwarf_register_8(regs) regs->r8 +#define dwarf_register_9(regs) regs->r9 +#define dwarf_register_10(regs) regs->r10 +#define dwarf_register_11(regs) regs->r11 +#define dwarf_register_12(regs) regs->r12 +#define dwarf_register_13(regs) regs->r13 +#define dwarf_register_14(regs) regs->r14 +#define dwarf_register_15(regs) regs->r15 #elif defined __powerpc__ |