diff options
Diffstat (limited to 'arch/sparc/kernel/kgdb.c')
| -rw-r--r-- | arch/sparc/kernel/kgdb.c | 164 |
1 files changed, 0 insertions, 164 deletions
diff --git a/arch/sparc/kernel/kgdb.c b/arch/sparc/kernel/kgdb.c deleted file mode 100644 index 757805ce02e..00000000000 --- a/arch/sparc/kernel/kgdb.c +++ /dev/null @@ -1,164 +0,0 @@ -/* kgdb.c: KGDB support for 32-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> - -extern unsigned long trapbase; - -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]; - 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_F31; i++) - gdb_regs[i] = 0; - - gdb_regs[GDB_Y] = regs->y; - gdb_regs[GDB_PSR] = regs->psr; - gdb_regs[GDB_WIM] = 0; - gdb_regs[GDB_TBR] = (unsigned long) &trapbase; - gdb_regs[GDB_PC] = regs->pc; - gdb_regs[GDB_NPC] = regs->npc; - gdb_regs[GDB_FSR] = 0; - gdb_regs[GDB_CSR] = 0; -} - -void sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *p) -{ - struct thread_info *t = task_thread_info(p); - struct reg_window *win; - 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] = 0; - 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; - 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_F31; i++) - gdb_regs[i] = 0; - - gdb_regs[GDB_Y] = 0; - - gdb_regs[GDB_PSR] = t->kpsr; - gdb_regs[GDB_WIM] = t->kwim; - gdb_regs[GDB_TBR] = (unsigned long) &trapbase; - gdb_regs[GDB_PC] = t->kpc; - gdb_regs[GDB_NPC] = t->kpc + 4; - gdb_regs[GDB_FSR] = 0; - gdb_regs[GDB_CSR] = 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 PSR register is changing, we have to preserve - * the CWP field, otherwise window save/restore explodes. - */ - if (regs->psr != gdb_regs[GDB_PSR]) { - unsigned long cwp = regs->psr & PSR_CWP; - - regs->psr = (gdb_regs[GDB_PSR] & ~PSR_CWP) | cwp; - } - - regs->pc = gdb_regs[GDB_PC]; - regs->npc = gdb_regs[GDB_NPC]; - regs->y = gdb_regs[GDB_Y]; - - win = (struct reg_window *) regs->u_regs[UREG_FP]; - 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]; -} - -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->pc = addr; - linux_regs->npc = addr + 4; - } - /* fallthru */ - - case 'D': - case 'k': - if (linux_regs->pc == (unsigned long) arch_kgdb_breakpoint) { - linux_regs->pc = linux_regs->npc; - linux_regs->npc += 4; - } - return 0; - } - return -1; -} - -extern void do_hw_interrupt(struct pt_regs *regs, unsigned long type); - -asmlinkage void kgdb_trap(struct pt_regs *regs) -{ - unsigned long flags; - - if (user_mode(regs)) { - do_hw_interrupt(regs, 0xfd); - 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 0x7d */ - .gdb_bpt_instr = { 0x91, 0xd0, 0x20, 0x7d }, -}; |