c18n: Remove unnecessary check for purecap ABI

lib/libc/aarch64/gen/_setjmp.S

@@ -55,11 +55,11 @@ ENTRY(_setjmp)
 #endif
 
 	/* Return value */
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
 	mov	c1, c0
 #endif
 	mov	x0, #0
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
 	/*
 	 * Tail-call to save Executive mode state
 	 */
@@ -81,7 +81,7 @@ ENTRY(_longjmp)
 
 	/* Restore the stack pointer */
 	ldr	REG(8), [REG(0)], #(REG_WIDTH)
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
 	mov	c2, c8
 #else
 	mov	REGN(sp), REG(8)
@@ -104,12 +104,12 @@ ENTRY(_longjmp)
 #endif
 
 	/* Load the return value */
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
 	mov	c3, c0
 #endif
 	cmp	x1, #0
 	csinc	x0, x1, xzr, ne
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
 	/*
 	 * Tail-call to restore Executive mode state
 	 */

lib/libc/aarch64/gen/setjmp.S

@@ -32,7 +32,7 @@
 #include <machine/setjmp.h>
 #include <sys/elf_common.h>
 
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
 .weak _rtld_setjmp
 .weak _rtld_longjmp
 #endif
@@ -70,11 +70,11 @@ ENTRY(setjmp)
 	stp	d14, d15, [REG(0)], #16
 
 	/* Return value */
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
 	mov	c1, c0
 #endif
 	mov	x0, #0
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
 	/*
 	 * Tail-call to save Executive mode state
 	 */
@@ -110,7 +110,7 @@ ENTRY(longjmp)
 
 	/* Restore the stack pointer */
 	ldr	REG(8), [REG(0)], #(REG_WIDTH)
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
 	mov	c2, c8
 #else
 	mov	REGN(sp), REG(8)
@@ -131,12 +131,12 @@ ENTRY(longjmp)
 	ldp	d14, d15, [REG(0)], #16
 
 	/* Load the return value */
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
 	mov	c3, c0
 #endif
 	cmp	x1, #0
 	csinc	x0, x1, xzr, ne
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
 	/*
 	 * Tail-call to restore Executive mode state
 	 */

lib/libc/gen/posix_spawn.c

@@ -341,7 +341,7 @@ do_posix_spawn(pid_t *pid, const char *path,
 	p = rfork_thread(RFSPAWN, stack + stacksz, _posix_spawn_thr, &psa);
 	free(stack);
 #else
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
 	p = __sys_rfork(RFSPAWN);
 #else
 	p = rfork(RFSPAWN);

lib/libc/include/libc_private.h

@@ -394,7 +394,7 @@ struct __nl_cat_d *__catopen_l(const char *name, int type,
 int __strerror_rl(int errnum, char *strerrbuf, size_t buflen,
 	    struct _xlocale *locale);
 
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
 __pid_t		__sys_rfork(int);
 int	sigaction_c18n(int, const struct sigaction *, struct sigaction *);
 #endif

lib/libc/sys/sigaction.c

@@ -35,7 +35,7 @@
 
 __weak_reference(__sys_sigaction, __sigaction);
 __weak_reference(sigaction, __libc_sigaction);
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
 /*
  * This weak symbol will always be resolved at runtime.
  */

lib/libsys/interposing_table.c

@@ -56,7 +56,7 @@ static interpos_func_t __libsys_interposing[INTERPOS_MAX] = {
 	SLOT(sendmsg, __sys_sendmsg),
 	SLOT(sendto, __sys_sendto),
 	SLOT(setcontext, __sys_setcontext),
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
 	SLOT(sigaction, sigaction_c18n),
 #else
 	SLOT(sigaction, __sys_sigaction),

lib/libthr/thread/thr_create.c

@@ -56,7 +56,7 @@
 
 static int  create_stack(struct pthread_attr *pattr);
 static void thread_start(struct pthread *curthread) __used;
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
 #pragma weak _thread_start = thread_start
 
 /*
@@ -151,7 +151,7 @@ _pthread_create(pthread_t * __restrict thread,
 		new_thread->flags = THR_FLAGS_NEED_SUSPEND;
 		create_suspended = 1;
 	} else {
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
 		/*
 		 * c18n: Always block all signals when creating a new thread to
 		 * allow RTLD to set up the environment to handle signals.
@@ -187,7 +187,7 @@ _pthread_create(pthread_t * __restrict thread,
 		locked = 1;
 	} else
 		locked = 0;
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
 	param.start_func = (void (*)(void *)) _rtld_thread_start;
 #else
 	param.start_func = (void (*)(void *)) thread_start;
@@ -298,7 +298,7 @@ thread_start(struct pthread *curthread)
 	sigset_t set;
 	bool restore_sigmask;
 
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
 	/*
 	 * At this point, curthread->tcb contains a fake wrapper TCB created by
 	 * RTLD when the thread was created. The real TCB has now been installed

lib/libthr/thread/thr_rtld.c

@@ -50,7 +50,7 @@ static void	_thr_rtld_rlock_acquire(void *);
 static int	_thr_rtld_set_flag(int);
 static void	_thr_rtld_wlock_acquire(void *);
 
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
 void _thread_start(struct pthread *);
 void _thr_sighandler(int, siginfo_t *, void *);
 
@@ -291,7 +291,7 @@ _thr_rtld_init(void)
 	/* mask signals, also force to resolve __sys_sigprocmask PLT */
 	_thr_signal_block(curthread);
 	_rtld_thread_init(&li);
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
 	_rtld_thread_start_init(_thread_start);
 	_rtld_sighandler_init(_thr_sighandler);
 #endif

lib/libthr/thread/thr_sig.c

@@ -69,7 +69,7 @@ static void handle_signal(struct sigaction *, int, siginfo_t *, ucontext_t *);
 static void check_deferred_signal(struct pthread *);
 static void check_suspend(struct pthread *);
 static void check_cancel(struct pthread *curthread, ucontext_t *ucp);
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
 #pragma weak _thr_sighandler = thr_sighandler
 
 /*
@@ -296,7 +296,7 @@ handle_signal(struct sigaction *actp, int sig, siginfo_t *info, ucontext_t *ucp)
 	if (!cancel_async)
 		curthread->cancel_enable = 0;
 
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
 	(void)sigfunc;
 #else
 	/* restore correct mask before calling user handler */
@@ -313,7 +313,7 @@ handle_signal(struct sigaction *actp, int sig, siginfo_t *info, ucontext_t *ucp)
 	 * so after setjmps() returns once more, the user code may need to
 	 * re-set cancel_enable flag by calling pthread_setcancelstate().
 	 */
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
 	_rtld_siginvoke(sig, info, ucp, actp);
 #else
 	if ((actp->sa_flags & SA_SIGINFO) != 0) {
@@ -336,7 +336,7 @@ handle_signal(struct sigaction *actp, int sig, siginfo_t *info, ucontext_t *ucp)
 	/* reschedule cancellation */
 	check_cancel(curthread, &uc2);
 	errno = err;
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
 	/*
 	 * Calling sigreturn outside of sigcode does not work with
 	 * compartmentalisation. Hence we set the user context and let the
@@ -432,7 +432,7 @@ check_deferred_signal(struct pthread *curthread)
 	/* remove signal */
 	curthread->deferred_siginfo.si_signo = 0;
 	handle_signal(&act, info.si_signo, &info, uc);
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
 	setcontext(uc);
 #endif
 }
@@ -500,7 +500,7 @@ _thr_signal_init(int dlopened)
 		for (sig = 1; sig <= _SIG_MAXSIG; sig++) {
 			if (sig == SIGCANCEL)
 				continue;
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
 			error = _rtld_sigaction(sig, NULL, &oact);
 #else
 			error = __sys_sigaction(sig, NULL, &oact);
@@ -514,7 +514,7 @@ _thr_signal_init(int dlopened)
 			remove_thr_signals(&usa->sigact.sa_mask);
 			nact.sa_flags &= ~SA_NODEFER;
 			nact.sa_flags |= SA_SIGINFO;
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
 			/* XXX: Ignore sigaltstack for now */
 			nact.sa_flags &= ~SA_ONSTACK;
 			nact.sa_sigaction = _rtld_sighandler;
@@ -650,7 +650,7 @@ __thr_sigaction(int sig, const struct sigaction *act, struct sigaction *oact)
 			remove_thr_signals(&usa->sigact.sa_mask);
 			newact.sa_flags &= ~SA_NODEFER;
 			newact.sa_flags |= SA_SIGINFO;
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
 			/* XXX: Ignore sigaltstack for now */
 			newact.sa_flags &= ~SA_ONSTACK;
 			newact.sa_sigaction = _rtld_sighandler;

libexec/rtld-elf/aarch64/reloc.c

@@ -38,7 +38,7 @@
 
 #include "debug.h"
 #include "rtld.h"
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
 #include "rtld_c18n.h"
 #endif
 #include "rtld_printf.h"
@@ -112,14 +112,14 @@ init_pltgot(Obj_Entry *obj)
 {
 
 	if (obj->pltgot != NULL) {
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
 		if (C18N_ENABLED)
 			obj->pltgot[1] = (uintptr_t)cheri_seal(obj,
 			    sealer_pltgot);
 		else
 #endif
 			obj->pltgot[1] = (uintptr_t)obj;
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
 		if (C18N_ENABLED)
 			obj->pltgot[2] = (uintptr_t)&_rtld_bind_start_c18n;
 		else
@@ -510,7 +510,7 @@ reloc_jmpslots(Obj_Entry *obj, int flags, RtldLockState *lockstate)
 				continue;
 			}
 			target = (uintptr_t)make_function_pointer(def, defobj);
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
 			target = (uintptr_t)tramp_intern(obj, &(struct tramp_data) {
 				.target = (void *)target,
 				.defobj = defobj,
@@ -572,7 +572,7 @@ reloc_iresolve_one(Obj_Entry *obj, const Elf_Rela *rela,
 	ptr = (uintptr_t)(obj->relocbase + rela->r_addend);
 #endif
 	lock_release(rtld_bind_lock, lockstate);
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
 	ptr = (uintptr_t)tramp_intern(NULL, &(struct tramp_data) {
 		.target = (void *)ptr,
 		.defobj = obj,
@@ -663,7 +663,7 @@ reloc_gnu_ifunc(Obj_Entry *obj, int flags,
 				continue;
 			lock_release(rtld_bind_lock, lockstate);
 			target = (uintptr_t)rtld_resolve_ifunc(defobj, def);
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
 			target = (uintptr_t)tramp_intern(obj, &(struct tramp_data) {
 				.target = (void *)target,
 				.defobj = defobj,

libexec/rtld-elf/aarch64/rtld_start.S

@@ -119,7 +119,7 @@ END(.rtld_start)
  * x17 = &_rtld_bind_start
  */
 ENTRY(C18N_SYM(_rtld_bind_start))
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
 	/*
 	 * Get the caller's current stack top.
 	 */
@@ -205,7 +205,7 @@ ENTRY(C18N_SYM(_rtld_bind_start))
 	/* Restore frame pointer */
 	ldp	PTR(29), PTR(zr), [PTRN(sp)], #(PTR_WIDTH * 2)
 
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
 	/*
 	 * Load caller's old stack top.
 	 */
@@ -246,7 +246,7 @@ ENTRY(C18N_SYM(_rtld_bind_start))
 	/* Call into the correct function */
 #if defined(__ARM_MORELLO_PURECAP_BENCHMARK_ABI)
 	br	x16
-#elif defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#elif defined(CHERI_LIB_C18N)
 	brr	PTR(16)
 #else
 	br	PTR(16)

libexec/rtld-elf/cheri/cheri_reloc.h

@@ -35,7 +35,7 @@
 
 #include "debug.h"
 #include "rtld.h"
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
 #include "rtld_c18n.h"
 #endif
 

libexec/rtld-elf/map_object.c

@@ -51,7 +51,7 @@
 
 #include "debug.h"
 #include "rtld.h"
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
 #include "rtld_c18n.h"
 #endif
 
@@ -278,7 +278,7 @@ map_object(int fd, const char *path, const struct stat *sb, const char* main_pat
 	    base_addr, mapsize, PROT_NONE | PROT_MAX(_PROT_ALL), base_flags);
     mapbase = mmap(base_addr, mapsize, PROT_NONE | PROT_MAX(_PROT_ALL),
 	base_flags, -1, 0);
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
     mapbase = cheri_clearperm(mapbase, c18n_code_perm_clear);
 #endif
     if (mapbase == MAP_FAILED) {

libexec/rtld-elf/rtld-libc/rtld_libc.h

@@ -51,7 +51,7 @@ int	__sys___getcwd(char *, size_t);
 int	__sys_sigprocmask(int, const sigset_t *, sigset_t *);
 int	__sys_thr_kill(long, int);
 int	__sys_thr_self(long *);
-#if defined(__CHERI_PURE_CAPABILITY__) && defined(CHERI_LIB_C18N)
+#ifdef CHERI_LIB_C18N
 void    __sys_thr_exit(long *);
 struct sigaction;
 int     __sys_sigaction(int, const struct sigaction *, struct sigaction *);