Re: [PATCH] libgloss: Resolve compilation errors for mips.

Mike Frysinger <[email protected]> Thu, 4 Jan 2024 18:54:43 -0500

Newsgroups	gmane.comp.lib.newlib
Message-ID	<ZZdFQ6tIRBDPixNk@vapier>

On 04 Jan 2024 13:59, Roger Sayle wrote:
> --- a/libgloss/kill.c
> +++ b/libgloss/kill.c
>
> +extern void _exit (int);

missing noreturn markings.  can this file include stdlib.h instead ?

> --- a/libgloss/mips/cfe_mem.c
> +++ b/libgloss/mips/cfe_mem.c
>
> -    memtop = __libcfe_mem_limit ();
> +    memtop = (unsigned long)__libcfe_mem_limit ();

if memtop is supposed to be a pointer, then it should be a pointer, not an
integer.

ignoring that, never use long or int to cast pointers.  this is what
uintptr_t is designed for.

> --- a/libgloss/mips/syscalls.c
> +++ b/libgloss/mips/syscalls.c
>
>  extern char _end[];
> +extern void *get_mem_info (void*);

seems like mips should have a header for its prototypes rather than duplicating
it across multiple files, and so it makes sure it's defined correctly both in
the callers & definitions.  seems like get_mem_info takes a struct pointer, not
a void.

> -  if (((size_t)heap_ptr >= heap_start) && ((size_t)heap_ptr < (heap_start + mem.size))) {
> -    avail = (heap_start + mem.size) - (size_t)heap_ptr;
> +  if ((heap_ptr >= heap_start) && (heap_ptr < (heap_start + mem.size))) {
> +    avail = (unsigned int)((heap_start + mem.size) - heap_ptr);

use ptrdiff_t to hold the difference between pointers, don't cast like this.

> --- a/libgloss/print.c
> +++ b/libgloss/print.c
>
>  #include "glue.h"
>
> +extern int outbyte (char x);

outbyte is already defined in glue.h which is included here

> --- a/libgloss/putnum.c
> +++ b/libgloss/putnum.c
> @@ -14,7 +14,7 @@
>   */
>  #include "glue.h"
>  
> -extern void print (char *ptr);
> +extern void print (const char *ptr);

this prob should be moved to glue.h instead
-mike

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