diff options
Diffstat (limited to 'sys/cddl/dev/dtrace/i386/dtrace_asm.S')
-rw-r--r-- | sys/cddl/dev/dtrace/i386/dtrace_asm.S | 164 |
1 files changed, 0 insertions, 164 deletions
diff --git a/sys/cddl/dev/dtrace/i386/dtrace_asm.S b/sys/cddl/dev/dtrace/i386/dtrace_asm.S index 6338719..d44f6c3 100644 --- a/sys/cddl/dev/dtrace/i386/dtrace_asm.S +++ b/sys/cddl/dev/dtrace/i386/dtrace_asm.S @@ -355,167 +355,3 @@ void dtrace_interrupt_enable(dtrace_icookie_t cookie) popfl ret END(dtrace_interrupt_enable) - -/* - * The panic() and cmn_err() functions invoke vpanic() as a common entry point - * into the panic code implemented in panicsys(). vpanic() is responsible - * for passing through the format string and arguments, and constructing a - * regs structure on the stack into which it saves the current register - * values. If we are not dying due to a fatal trap, these registers will - * then be preserved in panicbuf as the current processor state. Before - * invoking panicsys(), vpanic() activates the first panic trigger (see - * common/os/panic.c) and switches to the panic_stack if successful. Note that - * DTrace takes a slightly different panic path if it must panic from probe - * context. Instead of calling panic, it calls into dtrace_vpanic(), which - * sets up the initial stack as vpanic does, calls dtrace_panic_trigger(), and - * branches back into vpanic(). - */ -/* -void vpanic(const char *format, va_list alist) -*/ - ENTRY(vpanic) /* Initial stack layout: */ - - pushl %ebp /* | %eip | 20 */ - movl %esp, %ebp /* | %ebp | 16 */ - pushl %eax /* | %eax | 12 */ - pushl %ebx /* | %ebx | 8 */ - pushl %ecx /* | %ecx | 4 */ - pushl %edx /* | %edx | 0 */ - - movl %esp, %ebx /* %ebx = current stack pointer */ - - lea panic_quiesce, %eax /* %eax = &panic_quiesce */ - pushl %eax /* push &panic_quiesce */ - call panic_trigger /* %eax = panic_trigger() */ - addl $4, %esp /* reset stack pointer */ - -vpanic_common: - cmpl $0, %eax /* if (%eax == 0) */ - je 0f /* goto 0f; */ - - /* - * If panic_trigger() was successful, we are the first to initiate a - * panic: we now switch to the reserved panic_stack before continuing. - */ - lea panic_stack, %esp /* %esp = panic_stack */ - addl $PANICSTKSIZE, %esp /* %esp += PANICSTKSIZE */ - -0: subl $REGSIZE, %esp /* allocate struct regs */ - - /* - * Now that we've got everything set up, store the register values as - * they were when we entered vpanic() to the designated location in - * the regs structure we allocated on the stack. - */ -#ifdef notyet - mov %gs, %edx - mov %edx, REGOFF_GS(%esp) - mov %fs, %edx - mov %edx, REGOFF_FS(%esp) - mov %es, %edx - mov %edx, REGOFF_ES(%esp) - mov %ds, %edx - mov %edx, REGOFF_DS(%esp) - movl %edi, REGOFF_EDI(%esp) - movl %esi, REGOFF_ESI(%esp) - movl 16(%ebx), %ecx - movl %ecx, REGOFF_EBP(%esp) - movl %ebx, %ecx - addl $20, %ecx - movl %ecx, REGOFF_ESP(%esp) - movl 8(%ebx), %ecx - movl %ecx, REGOFF_EBX(%esp) - movl 0(%ebx), %ecx - movl %ecx, REGOFF_EDX(%esp) - movl 4(%ebx), %ecx - movl %ecx, REGOFF_ECX(%esp) - movl 12(%ebx), %ecx - movl %ecx, REGOFF_EAX(%esp) - movl $0, REGOFF_TRAPNO(%esp) - movl $0, REGOFF_ERR(%esp) - lea vpanic, %ecx - movl %ecx, REGOFF_EIP(%esp) - mov %cs, %edx - movl %edx, REGOFF_CS(%esp) - pushfl - popl %ecx - movl %ecx, REGOFF_EFL(%esp) - movl $0, REGOFF_UESP(%esp) - mov %ss, %edx - movl %edx, REGOFF_SS(%esp) - - movl %esp, %ecx /* %ecx = ®s */ - pushl %eax /* push on_panic_stack */ - pushl %ecx /* push ®s */ - movl 12(%ebp), %ecx /* %ecx = alist */ - pushl %ecx /* push alist */ - movl 8(%ebp), %ecx /* %ecx = format */ - pushl %ecx /* push format */ - call panicsys /* panicsys(); */ - addl $16, %esp /* pop arguments */ - - addl $REGSIZE, %esp -#endif - popl %edx - popl %ecx - popl %ebx - popl %eax - leave - ret - END(vpanic) - -/* -void dtrace_vpanic(const char *format, va_list alist) -*/ - ENTRY(dtrace_vpanic) /* Initial stack layout: */ - - pushl %ebp /* | %eip | 20 */ - movl %esp, %ebp /* | %ebp | 16 */ - pushl %eax /* | %eax | 12 */ - pushl %ebx /* | %ebx | 8 */ - pushl %ecx /* | %ecx | 4 */ - pushl %edx /* | %edx | 0 */ - - movl %esp, %ebx /* %ebx = current stack pointer */ - - lea panic_quiesce, %eax /* %eax = &panic_quiesce */ - pushl %eax /* push &panic_quiesce */ - call dtrace_panic_trigger /* %eax = dtrace_panic_trigger() */ - addl $4, %esp /* reset stack pointer */ - jmp vpanic_common /* jump back to common code */ - - END(dtrace_vpanic) - -/* -int -panic_trigger(int *tp) -*/ - ENTRY(panic_trigger) - xorl %eax, %eax - movl $0xdefacedd, %edx - lock - xchgl %edx, (%edi) - cmpl $0, %edx - je 0f - movl $0, %eax - ret -0: movl $1, %eax - ret - END(panic_trigger) - -/* -int -dtrace_panic_trigger(int *tp) -*/ - ENTRY(dtrace_panic_trigger) - xorl %eax, %eax - movl $0xdefacedd, %edx - lock - xchgl %edx, (%edi) - cmpl $0, %edx - je 0f - movl $0, %eax - ret -0: movl $1, %eax - ret - END(dtrace_panic_trigger) |