(libdl) Fwd: New Defects reported by Coverity Scan for RTEMS

[Joel Sherrill]

Moving it back to devel at .

It appears to be from this bit of magic in the same file which implements
it using a direct reference to register g7.

#elif defined(__sparc__)
#include <stdint.h>
# define __get_tls() ({ void** __val; register uintptr_t g7 __asm__( "g7"
); __val = (void**) g7; __val; })

I honestly don't know how to tell Coverity or GCC that this is reading a
register we trust.


On Mon, Aug 21, 2023 at 2:58 PM Chris Johns <chrisj at rtems.org> wrote:

> Hi
>
> It is code from somewhere else so sorry I have no idea.
>
> Chris
>
> On 21 Aug 2023, at 11:33 pm, Joel Sherrill <joel at rtems.org> wrote:
>
> 
> Unitialized variable issue from Coverity in libdl
>
> ---------- Forwarded message ---------
> From: <scan-admin at coverity.com>
> Date: Mon, Aug 21, 2023 at 12:33 AM
> Subject: New Defects reported by Coverity Scan for RTEMS
> To: <build at rtems.org>
>
>
> Hi,
>
> Please find the latest report on new defect(s) introduced to RTEMS found
> with Coverity Scan.
>
> 1 new defect(s) introduced to RTEMS found with Coverity Scan.
>
>
> New defect(s) Reported-by: Coverity Scan
> Showing 1 of 1 defect(s)
>
>
> ** CID 1541150:  Memory - illegal accesses  (UNINIT)
> /cpukit/libdl/rtl-tls.c: 111 in rtems_rtl_tls_get_base()
>
>
>
> ________________________________________________________________________________________________________
> *** CID 1541150:  Memory - illegal accesses  (UNINIT)
> /cpukit/libdl/rtl-tls.c: 111 in rtems_rtl_tls_get_base()
> 105     #endif
> 106
> 107     #if defined(__get_tls)
> 108
> 109     void* rtems_rtl_tls_get_base (void)
> 110     {
> >>>     CID 1541150:  Memory - illegal accesses  (UNINIT)
> >>>     Using uninitialized value "g7".
> 111       return (void*) __get_tls();
> 112     }
> 113
>
>
>
> ________________________________________________________________________________________________________
> To view the defects in Coverity Scan visit,
> https://u15810271.ct.sendgrid.net/ls/click?upn=HRESupC-2F2Czv4BOaCWWCy7my0P0qcxCbhZ31OYv50ypUUzi-2FdSNmuyRB7BEFT8xQ4-2B8hpujh0hTgQljRGId4Dg-3D-3Deeiw_EU3W9teASMK00lBXX9WT4lsogDrkCcNZLvg-2FVxwAXMqJ0gdhGGumG7Gy0Tn5Dw3PQUbh2-2BNMdpxfdtJmNYuHO3QG97iSLio7uY7m4yyhwWxZmfc2p4Yk5m-2B2JQ7-2FNr1n2P8EvOyfDnsHe5-2FCDlZpmVnHhGqVY9mLjZbQG-2FJIE3w3MlGbiKwQw8j63a169WP32Wpts1j8m1uekKxkyIv1KA-3D-3D
>
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>
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