Function calls missing args for functions with defined arguments on QNX PPC

Version and Platform (required):

• Binary Ninja Version: 4.2.6455-Stable
• OS: Ubuntu
• OS Version: 22.04.5
• CPU Architecture: AMD64

Bug Description:

Looking at PPCBE QNX binaries, will often see a function call that has a
complete and correct signature in the .plt section. Occasionally in the
binary, calls to this function will not have the correct number of arguments.

libsnmp.so.1 from exhibits this problem several times in the snmp_open
function.

I often use the "Override Call Type..." feature to force binaj to show the
call with the correct number of arguments.

Also, the "Override Call Type..." GUI default signature is very vanilla. It
is always:

void calltarget()

Would be more helpful to start with the current function signature (that the
user is tyring to change), or the function signature of the target function.

Steps To Reproduce:

1. Load PPCBE QNX binary.
2. Goto the .plt section, and look for pretty standard libc functions
3. Look at callrefs to function with known signatures and see that some have
   decompilation with missing params

Expected Behavior:

Expected function signature shown for function in .plt section to be the same
as the decompiler shows for calls to the function

Screenshots/Video Recording:

Binary:

Sent binary via slack posting

Additional Information:

Start by loading the supplied PPCBE QNX binary and inspect the .plt entry for snmp_open alongside its call references and decompiler output. Compare the target signature with the arguments shown at each call, then inspect the Override Call Type dialog's default signature. Done means calls consistently show the defined argument list and the dialog offers a relevant existing signature.