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https://github.com/AetherDroid/android_kernel_samsung_on5xelte.git
synced 2025-10-31 16:18:51 +01:00
Fixed MTP to work with TWRP
This commit is contained in:
awab228
commit
f6dfaef42e
50820 changed files with 20846062 additions and 0 deletions
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arch/sparc/kernel/kgdb_64.c
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arch/sparc/kernel/kgdb_64.c
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/* kgdb.c: KGDB support for 64-bit sparc.
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*
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* Copyright (C) 2008 David S. Miller <davem@davemloft.net>
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*/
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#include <linux/kgdb.h>
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#include <linux/kdebug.h>
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#include <linux/ftrace.h>
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#include <linux/context_tracking.h>
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#include <asm/cacheflush.h>
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#include <asm/kdebug.h>
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#include <asm/ptrace.h>
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#include <asm/irq.h>
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#include "kernel.h"
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void pt_regs_to_gdb_regs(unsigned long *gdb_regs, struct pt_regs *regs)
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{
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struct reg_window *win;
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int i;
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gdb_regs[GDB_G0] = 0;
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for (i = 0; i < 15; i++)
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gdb_regs[GDB_G1 + i] = regs->u_regs[UREG_G1 + i];
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win = (struct reg_window *) (regs->u_regs[UREG_FP] + STACK_BIAS);
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for (i = 0; i < 8; i++)
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gdb_regs[GDB_L0 + i] = win->locals[i];
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for (i = 0; i < 8; i++)
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gdb_regs[GDB_I0 + i] = win->ins[i];
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for (i = GDB_F0; i <= GDB_F62; i++)
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gdb_regs[i] = 0;
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gdb_regs[GDB_PC] = regs->tpc;
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gdb_regs[GDB_NPC] = regs->tnpc;
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gdb_regs[GDB_STATE] = regs->tstate;
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gdb_regs[GDB_FSR] = 0;
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gdb_regs[GDB_FPRS] = 0;
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gdb_regs[GDB_Y] = regs->y;
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}
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void sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *p)
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{
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struct thread_info *t = task_thread_info(p);
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extern unsigned int switch_to_pc;
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extern unsigned int ret_from_fork;
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struct reg_window *win;
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unsigned long pc, cwp;
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int i;
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for (i = GDB_G0; i < GDB_G6; i++)
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gdb_regs[i] = 0;
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gdb_regs[GDB_G6] = (unsigned long) t;
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gdb_regs[GDB_G7] = (unsigned long) p;
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for (i = GDB_O0; i < GDB_SP; i++)
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gdb_regs[i] = 0;
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gdb_regs[GDB_SP] = t->ksp;
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gdb_regs[GDB_O7] = 0;
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win = (struct reg_window *) (t->ksp + STACK_BIAS);
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for (i = 0; i < 8; i++)
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gdb_regs[GDB_L0 + i] = win->locals[i];
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for (i = 0; i < 8; i++)
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gdb_regs[GDB_I0 + i] = win->ins[i];
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for (i = GDB_F0; i <= GDB_F62; i++)
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gdb_regs[i] = 0;
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if (t->new_child)
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pc = (unsigned long) &ret_from_fork;
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else
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pc = (unsigned long) &switch_to_pc;
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gdb_regs[GDB_PC] = pc;
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gdb_regs[GDB_NPC] = pc + 4;
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cwp = __thread_flag_byte_ptr(t)[TI_FLAG_BYTE_CWP];
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gdb_regs[GDB_STATE] = (TSTATE_PRIV | TSTATE_IE | cwp);
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gdb_regs[GDB_FSR] = 0;
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gdb_regs[GDB_FPRS] = 0;
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gdb_regs[GDB_Y] = 0;
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}
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void gdb_regs_to_pt_regs(unsigned long *gdb_regs, struct pt_regs *regs)
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{
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struct reg_window *win;
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int i;
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for (i = 0; i < 15; i++)
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regs->u_regs[UREG_G1 + i] = gdb_regs[GDB_G1 + i];
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/* If the TSTATE register is changing, we have to preserve
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* the CWP field, otherwise window save/restore explodes.
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*/
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if (regs->tstate != gdb_regs[GDB_STATE]) {
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unsigned long cwp = regs->tstate & TSTATE_CWP;
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regs->tstate = (gdb_regs[GDB_STATE] & ~TSTATE_CWP) | cwp;
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}
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regs->tpc = gdb_regs[GDB_PC];
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regs->tnpc = gdb_regs[GDB_NPC];
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regs->y = gdb_regs[GDB_Y];
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win = (struct reg_window *) (regs->u_regs[UREG_FP] + STACK_BIAS);
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for (i = 0; i < 8; i++)
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win->locals[i] = gdb_regs[GDB_L0 + i];
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for (i = 0; i < 8; i++)
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win->ins[i] = gdb_regs[GDB_I0 + i];
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}
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#ifdef CONFIG_SMP
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void __irq_entry smp_kgdb_capture_client(int irq, struct pt_regs *regs)
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{
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unsigned long flags;
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__asm__ __volatile__("rdpr %%pstate, %0\n\t"
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"wrpr %0, %1, %%pstate"
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: "=r" (flags)
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: "i" (PSTATE_IE));
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flushw_all();
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if (atomic_read(&kgdb_active) != -1)
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kgdb_nmicallback(raw_smp_processor_id(), regs);
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__asm__ __volatile__("wrpr %0, 0, %%pstate"
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: : "r" (flags));
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}
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#endif
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int kgdb_arch_handle_exception(int e_vector, int signo, int err_code,
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char *remcomInBuffer, char *remcomOutBuffer,
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struct pt_regs *linux_regs)
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{
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unsigned long addr;
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char *ptr;
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switch (remcomInBuffer[0]) {
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case 'c':
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/* try to read optional parameter, pc unchanged if no parm */
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ptr = &remcomInBuffer[1];
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if (kgdb_hex2long(&ptr, &addr)) {
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linux_regs->tpc = addr;
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linux_regs->tnpc = addr + 4;
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}
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/* fallthru */
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case 'D':
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case 'k':
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if (linux_regs->tpc == (unsigned long) arch_kgdb_breakpoint) {
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linux_regs->tpc = linux_regs->tnpc;
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linux_regs->tnpc += 4;
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}
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return 0;
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}
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return -1;
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}
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asmlinkage void kgdb_trap(unsigned long trap_level, struct pt_regs *regs)
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{
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enum ctx_state prev_state = exception_enter();
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unsigned long flags;
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if (user_mode(regs)) {
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bad_trap(regs, trap_level);
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goto out;
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}
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flushw_all();
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local_irq_save(flags);
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kgdb_handle_exception(0x172, SIGTRAP, 0, regs);
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local_irq_restore(flags);
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out:
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exception_exit(prev_state);
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}
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int kgdb_arch_init(void)
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{
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return 0;
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}
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void kgdb_arch_exit(void)
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{
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}
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void kgdb_arch_set_pc(struct pt_regs *regs, unsigned long ip)
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{
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regs->tpc = ip;
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regs->tnpc = regs->tpc + 4;
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}
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struct kgdb_arch arch_kgdb_ops = {
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/* Breakpoint instruction: ta 0x72 */
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.gdb_bpt_instr = { 0x91, 0xd0, 0x20, 0x72 },
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};
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