sysdeps/linux-gnu/sparc/regs.c

#include "config.h"

#include <sys/types.h>
#include "ptrace.h"
#include "common.h"

void *
get_instruction_pointer(Process *proc) {
	proc_archdep *a = (proc_archdep *) (proc->arch_ptr);
	if (a->valid)
		return (void *)a->regs.pc;
	return (void *)-1;
}

void
set_instruction_pointer(Process *proc, void *addr) {
	proc_archdep *a = (proc_archdep *) (proc->arch_ptr);
	if (a->valid)
		a->regs.pc = (long)addr;
}

void *
get_stack_pointer(Process *proc) {
	proc_archdep *a = (proc_archdep *) (proc->arch_ptr);
	if (a->valid)
		return (void *)a->regs.u_regs[UREG_I5];
	return (void *)-1;
}

void *
get_return_addr(Process *proc, void *stack_pointer) {
	proc_archdep *a = (proc_archdep *) (proc->arch_ptr);
	unsigned int t;
	if (!a->valid)
		return (void *)-1;
	/* Work around structure returns */
	t = ptrace(PTRACE_PEEKTEXT, proc->pid, a->regs.u_regs[UREG_I6] + 8, 0);
	if (t < 0x400000)
		return (void *)a->regs.u_regs[UREG_I6] + 12;
	return (void *)a->regs.u_regs[UREG_I6] + 8;
}

void
set_return_addr(Process *proc, void *addr) {
	proc_archdep *a = (proc_archdep *) (proc->arch_ptr);
	if (!a->valid)
		return;
	ptrace(PTRACE_POKETEXT, proc->pid, a->regs.u_regs[UREG_I6] + 8, addr);
}