arm/arm/machdep_ptrace.c

41 ptrace_read_int(struct thread *td, vm_offset_t addr, uint32_t *v)
44 	if (proc_readmem(td, td->td_proc, addr, v, sizeof(*v)) != sizeof(*v))
50 ptrace_write_int(struct thread *td, vm_offset_t addr, uint32_t v)
53 	if (proc_writemem(td, td->td_proc, addr, &v, sizeof(v)) != sizeof(v))
62 	struct thread *td = cookie;
69 		ret = td->td_frame->tf_pc;
72 		ret = td->td_frame->tf_usr_lr;
75 		ret = td->td_frame->tf_usr_sp;
78 		ret = *((register_t*)&td->td_frame->tf_r0 + reg);
88 	struct thread *td = cookie;
91 	error = ptrace_read_int(td, offset, val);
101  * @param     td                Thread structure of analysed task
111 ptrace_get_alternative_next(struct thread *td, uint32_t cur_instr,
118 		error = arm_predict_branch(td, cur_instr, td->td_frame->tf_pc,
128 ptrace_single_step(struct thread *td)
135 	if ((td->td_frame->tf_spsr & PSR_T) != 0)
138 	KASSERT(td->td_md.md_ptrace_instr == 0,
140 	KASSERT(td->td_md.md_ptrace_instr_alt == 0,
142 	p = td->td_proc;
145 	error = ptrace_read_int(td, td->td_frame->tf_pc,
150 	error = ptrace_read_int(td, td->td_frame->tf_pc + INSN_SIZE,
151 	    &td->td_md.md_ptrace_instr);
153 		error = ptrace_write_int(td, td->td_frame->tf_pc + INSN_SIZE,
156 			td->td_md.md_ptrace_instr = 0;
158 			td->td_md.md_ptrace_addr = td->td_frame->tf_pc +
163 	error_alt = ptrace_get_alternative_next(td, cur_instr, &alt_next);
165 		error_alt = ptrace_read_int(td, alt_next,
166 		    &td->td_md.md_ptrace_instr_alt);
168 			td->td_md.md_ptrace_instr_alt = 0;
170 			error_alt = ptrace_write_int(td, alt_next,
173 				td->td_md.md_ptrace_instr_alt = 0;
175 				td->td_md.md_ptrace_addr_alt = alt_next;
185 ptrace_clear_single_step(struct thread *td)
190 	if ((td->td_frame->tf_spsr & PSR_T) != 0)
193 	if (td->td_md.md_ptrace_instr != 0) {
194 		p = td->td_proc;
196 		ptrace_write_int(td, td->td_md.md_ptrace_addr,
197 		    td->td_md.md_ptrace_instr);
199 		td->td_md.md_ptrace_instr = 0;
202 	if (td->td_md.md_ptrace_instr_alt != 0) {
203 		p = td->td_proc;
205 		ptrace_write_int(td, td->td_md.md_ptrace_addr_alt,
206 		    td->td_md.md_ptrace_instr_alt);
208 		td->td_md.md_ptrace_instr_alt = 0;
215 ptrace_set_pc(struct thread *td, unsigned long addr)
217 	td->td_frame->tf_pc = addr;