Fix some warnings for implicit declaration of functions

When running make for the different libs I got warnings for implicit declaration of functions. I am not an expert on C/C++, but I understand these are because the source code is not including the declaration of the functions. So, I searched for the proper header files and modified the source code to include them.

Used dependencies

firmware505 branch of https://github.com/psxdev/ps4sdk (at commit df03b9fd274ec5dabf105a07e6cb9f0bf6685801).

Solved implicit declarations

For libelfloader:

source/elfloader.c:690:3: warning: implicit declaration of function 'munmap' is invalid in C99 [-Wimplicit-function-declaration]
                munmap(elf->data,elf->size);
                ^

For libps4link:

source/jailbreak.c:119:2: warning: implicit declaration of function 'debugNetPrintf' is invalid in C99 [-Wimplicit-function-declaration]
        debugNetPrintf(3,"td %x",td);
        ^
source/jailbreak.c:126:6: warning: implicit declaration of function 'syscall' is invalid in C99 [-Wimplicit-function-declaration]
        ret=syscall(11,jailbreak,td,dump);
            ^

For liborbisAudio:

source/orbisAudio.c:381:3: warning: implicit declaration of function 'sleep' is invalid in C99 [-Wimplicit-function-declaration]
                sleep(2);
                ^

For liborbisKeyboard:

source/orbisKeyboard.c:619:2: warning: implicit declaration of function 'sleep' is invalid in C99 [-Wimplicit-function-declaration]
        sleep(1);
        ^

Pending implicit declarations

There are two pending implicit declarations that I don't know how to solve properly. These are not solved by this PR: For libps4link:

source/commands.c:679:6: warning: implicit declaration of function 'sysctl' is invalid in C99 [-Wimplicit-function-declaration]
                if(sysctl(mib,4,NULL,&len,NULL,0)!=-1) 
                   ^
source/commands.c:732:6: warning: implicit declaration of function 'ptrace' is invalid in C99 [-Wimplicit-function-declaration]
        ret=ptrace(PT_ATTACH,i,NULL,NULL);
            ^

In my attempts of solving these, I figured:

sys/sysctl.h is already included on source/commands.c:34
sys/ptrace.h is already included on source/commands.c:36
the declaration for sysctl is on sys/sysctl.h:793 when _KERNEL is not defined sys/sysctl.h:789
the declaration for ptrace is on sys/ptrace.h:188 when _KERNEL is not defined sys/ptrace.h:183
_KERNEL is defined on ps4/kernel.h:3
ps4/kernel.h is included on source/commands.c:27 (before sys/sysctl.h and sys/ptrace.h)

Based on this I conclude that including ps4/kernel.h before sys/sysctl.h and sys/ptrace.h makes sysctl and ptrace to not be defined.

I tried moving the #include <sys/sysctl.h> before the #include <ps4/kernel.h>. This seems to work for sysctl. I also tried moving the #include <sys/ptrace.h> before the #include <ps4/kernel.h>. But this resulted in 4 errors:

source/commands.c:500:10: error: use of undeclared identifier 'TRUE'
                return TRUE;
                       ^
source/commands.c:505:10: error: use of undeclared identifier 'FALSE'
                return FALSE;
                       ^
source/commands.c:524:13: error: use of undeclared identifier 'TRUE'
                                        return TRUE;
                                               ^
source/commands.c:529:9: error: use of undeclared identifier 'FALSE'
        return FALSE;
               ^

For this I figured:

sys/ptrace.h:37 includes sys/param.h
TRUE and FALSE are defined from sys/param.h:101 only when _KERNEL is defined on sys/param.h:93
sys/param.h:38 only loads the content the first time it is included.

Based on this I conclude that including sys/ptrace.h before ps4/kernel.h makes TRUE and FALSE to not be defined.

I don't see a solution to this problem without modifying sys/ptrace.h or ps4/kernel.h. Any ideas?

orbisdev / liborbis