diff options
Diffstat (limited to 'arch/sparc64/kernel/kgdb.c')
| -rw-r--r-- | arch/sparc64/kernel/kgdb.c | 186 |
1 files changed, 0 insertions, 186 deletions
diff --git a/arch/sparc64/kernel/kgdb.c b/arch/sparc64/kernel/kgdb.c deleted file mode 100644 index fefbe6dc51b..00000000000 --- a/arch/sparc64/kernel/kgdb.c +++ /dev/null @@ -1,186 +0,0 @@ -/* kgdb.c: KGDB support for 64-bit sparc. - * - * Copyright (C) 2008 David S. Miller <davem@davemloft.net> - */ - -#include <linux/kgdb.h> -#include <linux/kdebug.h> - -#include <asm/kdebug.h> -#include <asm/ptrace.h> -#include <asm/irq.h> - -void pt_regs_to_gdb_regs(unsigned long *gdb_regs, struct pt_regs *regs) -{ - struct reg_window *win; - int i; - - gdb_regs[GDB_G0] = 0; - for (i = 0; i < 15; i++) - gdb_regs[GDB_G1 + i] = regs->u_regs[UREG_G1 + i]; - - win = (struct reg_window *) (regs->u_regs[UREG_FP] + STACK_BIAS); - for (i = 0; i < 8; i++) - gdb_regs[GDB_L0 + i] = win->locals[i]; - for (i = 0; i < 8; i++) - gdb_regs[GDB_I0 + i] = win->ins[i]; - - for (i = GDB_F0; i <= GDB_F62; i++) - gdb_regs[i] = 0; - - gdb_regs[GDB_PC] = regs->tpc; - gdb_regs[GDB_NPC] = regs->tnpc; - gdb_regs[GDB_STATE] = regs->tstate; - gdb_regs[GDB_FSR] = 0; - gdb_regs[GDB_FPRS] = 0; - gdb_regs[GDB_Y] = regs->y; -} - -void sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *p) -{ - struct thread_info *t = task_thread_info(p); - extern unsigned int switch_to_pc; - extern unsigned int ret_from_syscall; - struct reg_window *win; - unsigned long pc, cwp; - int i; - - for (i = GDB_G0; i < GDB_G6; i++) - gdb_regs[i] = 0; - gdb_regs[GDB_G6] = (unsigned long) t; - gdb_regs[GDB_G7] = (unsigned long) p; - for (i = GDB_O0; i < GDB_SP; i++) - gdb_regs[i] = 0; - gdb_regs[GDB_SP] = t->ksp; - gdb_regs[GDB_O7] = 0; - - win = (struct reg_window *) (t->ksp + STACK_BIAS); - for (i = 0; i < 8; i++) - gdb_regs[GDB_L0 + i] = win->locals[i]; - for (i = 0; i < 8; i++) - gdb_regs[GDB_I0 + i] = win->ins[i]; - - for (i = GDB_F0; i <= GDB_F62; i++) - gdb_regs[i] = 0; - - if (t->new_child) - pc = (unsigned long) &ret_from_syscall; - else - pc = (unsigned long) &switch_to_pc; - - gdb_regs[GDB_PC] = pc; - gdb_regs[GDB_NPC] = pc + 4; - - cwp = __thread_flag_byte_ptr(t)[TI_FLAG_BYTE_CWP]; - - gdb_regs[GDB_STATE] = (TSTATE_PRIV | TSTATE_IE | cwp); - gdb_regs[GDB_FSR] = 0; - gdb_regs[GDB_FPRS] = 0; - gdb_regs[GDB_Y] = 0; -} - -void gdb_regs_to_pt_regs(unsigned long *gdb_regs, struct pt_regs *regs) -{ - struct reg_window *win; - int i; - - for (i = 0; i < 15; i++) - regs->u_regs[UREG_G1 + i] = gdb_regs[GDB_G1 + i]; - - /* If the TSTATE register is changing, we have to preserve - * the CWP field, otherwise window save/restore explodes. - */ - if (regs->tstate != gdb_regs[GDB_STATE]) { - unsigned long cwp = regs->tstate & TSTATE_CWP; - - regs->tstate = (gdb_regs[GDB_STATE] & ~TSTATE_CWP) | cwp; - } - - regs->tpc = gdb_regs[GDB_PC]; - regs->tnpc = gdb_regs[GDB_NPC]; - regs->y = gdb_regs[GDB_Y]; - - win = (struct reg_window *) (regs->u_regs[UREG_FP] + STACK_BIAS); - for (i = 0; i < 8; i++) - win->locals[i] = gdb_regs[GDB_L0 + i]; - for (i = 0; i < 8; i++) - win->ins[i] = gdb_regs[GDB_I0 + i]; -} - -#ifdef CONFIG_SMP -void smp_kgdb_capture_client(struct pt_regs *regs) -{ - unsigned long flags; - - __asm__ __volatile__("rdpr %%pstate, %0\n\t" - "wrpr %0, %1, %%pstate" - : "=r" (flags) - : "i" (PSTATE_IE)); - - flushw_all(); - - if (atomic_read(&kgdb_active) != -1) - kgdb_nmicallback(raw_smp_processor_id(), regs); - - __asm__ __volatile__("wrpr %0, 0, %%pstate" - : : "r" (flags)); -} -#endif - -int kgdb_arch_handle_exception(int e_vector, int signo, int err_code, - char *remcomInBuffer, char *remcomOutBuffer, - struct pt_regs *linux_regs) -{ - unsigned long addr; - char *ptr; - - switch (remcomInBuffer[0]) { - case 'c': - /* try to read optional parameter, pc unchanged if no parm */ - ptr = &remcomInBuffer[1]; - if (kgdb_hex2long(&ptr, &addr)) { - linux_regs->tpc = addr; - linux_regs->tnpc = addr + 4; - } - /* fallthru */ - - case 'D': - case 'k': - if (linux_regs->tpc == (unsigned long) arch_kgdb_breakpoint) { - linux_regs->tpc = linux_regs->tnpc; - linux_regs->tnpc += 4; - } - return 0; - } - return -1; -} - -asmlinkage void kgdb_trap(unsigned long trap_level, struct pt_regs *regs) -{ - unsigned long flags; - - if (user_mode(regs)) { - bad_trap(regs, trap_level); - return; - } - - flushw_all(); - - local_irq_save(flags); - kgdb_handle_exception(0x172, SIGTRAP, 0, regs); - local_irq_restore(flags); -} - -int kgdb_arch_init(void) -{ - return 0; -} - -void kgdb_arch_exit(void) -{ -} - -struct kgdb_arch arch_kgdb_ops = { - /* Breakpoint instruction: ta 0x72 */ - .gdb_bpt_instr = { 0x91, 0xd0, 0x20, 0x72 }, -}; |