> This is just a draft.
>
> Index: arch/hppa/hppa/machdep.c
> @@ -1329,11 +1330,31 @@ sys_sigreturn(struct proc *p, void *v, r
> struct trapframe *tf = p->p_md.md_regs;
> int error;
>
> + if (PROC_PC(p) != (u_int64_t)p->p_p->ps_sigcode +
Why uint64_t here? This is a 32-bit platfoâ…»m.
> Index: arch/m88k/m88k/sig_machdep.c
> @@ -207,18 +207,34 @@ sys_sigreturn(struct proc *p, void *v, r
> struct sys_sigreturn_args /* {
> syscallarg(struct sigcontext *) sigcntxp;
> } */ *uap = v;
> - struct sigcontext *scp;
> + struct sigcontext *scp = SCARG(uap, sigcntxp);
> struct trapframe *tf;
> struct sigcontext ksc;
>
> - scp = (struct sigcontext *)SCARG(uap, sigcntxp);
> -#ifdef DEBUG
> - if (sigdebug & SDB_FOLLOW)
> - printf("sigreturn: pid %d, scp %p\n", p->p_pid, scp);
> -#endif
> - if (((vaddr_t)scp & 3) != 0 ||
> - copyin((caddr_t)scp, (caddr_t)&ksc, sizeof(struct sigcontext)))
> + if (PROC_PC(p) != (u_int64_t)p->p_p->ps_sigcode +
Ditto.
> Index: arch/macppc/macppc/machdep.c
> @@ -512,8 +513,29 @@ sys_sigreturn(struct proc *p, void *v, r
> struct trapframe *tf;
> int error;
>
> + if (PROC_PC(p) != (u_int64_t)p->p_p->ps_sigcode +
Same.
> Index: arch/sh/sh/sh_machdep.c
> @@ -519,18 +520,32 @@ sys_sigreturn(struct proc *p, void *v, r
> struct sys_sigreturn_args /* {
> syscallarg(struct sigcontext *) sigcntxp;
> } */ *uap = v;
> - struct sigcontext *scp, context;
> + struct sigcontext *scp = SCARG(uap, sigcntxp), context;
> struct trapframe *tf;
> int error;
>
> - /*
> - * The trampoline code hands us the context.
> - * It is unsafe to keep track of it ourselves, in the event that a
> - * program jumps out of a signal handler.
> - */
> - scp = SCARG(uap, sigcntxp);
> + if (PROC_PC(p) != (u_int64_t)p->p_p->ps_sigcode +
Guess.
> Index: arch/socppc/socppc/machdep.c
> @@ -539,8 +540,30 @@ sys_sigreturn(struct proc *p, void *v, r
> struct trapframe *tf;
> int error;
>
> + if (PROC_PC(p) != (u_int64_t)p->p_p->ps_sigcode +
Yawn.
