rtld: Revert "When loading dso without PT_GNU_STACK phdr, only call"

[jhb]

Summary

After the removal of ia64 and sparc64, all current architectures
support executable stacks at an architectural level.

This reverts commit 1290d38ac50b3afa7e5781d9d97346a1042c736c.

libexec/rtld-elf/aarch64/rtld_machdep.h

 
 typedef struct {
     unsigned long ti_module;
     unsigned long ti_offset;
 } tls_index;
 
 extern void *__tls_get_addr(tls_index *ti);
 
-#define RTLD_DEFAULT_STACK_PF_EXEC      PF_X
-#define RTLD_DEFAULT_STACK_EXEC         PROT_EXEC
-
 #define md_abi_variant_hook(x)
 
 #endif

libexec/rtld-elf/amd64/rtld_machdep.h

 
 typedef struct {
     unsigned long ti_module;
     unsigned long ti_offset;
 } tls_index;
 
 void *__tls_get_addr(tls_index *ti) __exported;
 
-#define RTLD_DEFAULT_STACK_PF_EXEC      PF_X
-#define RTLD_DEFAULT_STACK_EXEC         PROT_EXEC
-
 #define md_abi_variant_hook(x)
 
 size_t calculate_first_tls_offset(size_t size, size_t align, size_t offset);
 size_t calculate_tls_offset(size_t prev_offset, size_t prev_size, size_t size,
     size_t align, size_t offset);
 #endif

libexec/rtld-elf/arm/rtld_machdep.h

#define calculate_first_tls_offset(size, align, offset) \
     round(8, align)
 #define calculate_tls_offset(prev_offset, prev_size, size, align, offset) \
     round(prev_offset + prev_size, align)
 #define calculate_tls_post_size(align) \
     round(TLS_TCB_SIZE, align) - TLS_TCB_SIZE
         
 extern void *__tls_get_addr(tls_index *ti);
 
-#define RTLD_DEFAULT_STACK_PF_EXEC      PF_X
-#define RTLD_DEFAULT_STACK_EXEC         PROT_EXEC
-
 #define md_abi_variant_hook(x)
 
 #endif

libexec/rtld-elf/i386/rtld_machdep.h

 typedef struct {
     unsigned long ti_module;
     unsigned long ti_offset;
 } tls_index;
 
 void *___tls_get_addr(tls_index *ti) __attribute__((__regparm__(1))) __exported;
 void *__tls_get_addr(tls_index *ti) __exported;
 
-#define RTLD_DEFAULT_STACK_PF_EXEC      PF_X
-#define RTLD_DEFAULT_STACK_EXEC         PROT_EXEC
-
 #define md_abi_variant_hook(x)
 
 size_t calculate_first_tls_offset(size_t size, size_t align, size_t offset);
 size_t calculate_tls_offset(size_t prev_offset, size_t prev_size, size_t size,
     size_t align, size_t offset);
 #endif