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How do I get random numbers on L4RE #1

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josephlr opened this issue Jul 7, 2019 · 5 comments
Closed

How do I get random numbers on L4RE #1

josephlr opened this issue Jul 7, 2019 · 5 comments

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@josephlr
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josephlr commented Jul 7, 2019 •
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I'm working on the getrandom Rust crate, and we're looking to add an implementation for the new x86_64-unknown-l4re-uclibc target.

Is there an easy way (like Linux's getrandom(2)) to get entropy on L4Re?
@lonvia
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lonvia commented Jul 9, 2019

Not really, I'm afraid. The L4Re kernel does not provide randomness by itself. Instead a user-land service would need to provide randomness using appropriate hardware for the system. There is currently no such service implemented as part of the L4Re core services, so you'd have to write your own.

@josephlr
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josephlr commented Jul 9, 2019

Thanks for the response @lonvia

We're just going to fallback to using RDRAND for crypto RNG then, as it looks like l4re is only on x86_64 at the moment.

@icedieler
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... l4re is only on x86_64 at the moment.

That is a false impression. L4Re supports x86, ARM and MIPS all in 32 and 64 bit.

@josephlr
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josephlr commented Jul 9, 2019

That is a false impression. L4Re supports x86, ARM and MIPS all in 32 and 64 bit.

Sorry, I meant to say that the only supported Rust targets are for x86_64.

@josephlr josephlr mentioned this issue Jul 11, 2019
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@jermar
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jermar commented Nov 26, 2019

I guess this can be closed now...

@jermar jermar closed this as completed Nov 26, 2019
kk-infra pushed a commit that referenced this issue Feb 29, 2024
@kk-infra
uclibc/unused: Squashed changes for unused features
e43f128 
This commit collects the following upstream updates to uclibc-ng in
features that are not currently used by L4Re, such as the ARC and nds32
architectures or nptl:

add init_module/delete_module syscall wrappers
use multiline comment for better copyright parsing
nptl: remove pthread_attr_init/pthread_create weak aliases
nptl_db: fix gcc compiler warnings

--

fts: fix gcc compiler warning

Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>

--

ARC: ldso: don't use _DYNAMIC@gotpc construct #1
ARC: ldso: don't use _DYNAMIC@gotpc construct #2

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

--

nds32: add NPTL/TLS, *context function, libm changes and code cleanup

Signed-off-by: Vincent Ren-Wei Chen <vincentc@andestech.com>

--

remove PID caching

Reviewed-by: Max Filippov <jcmvbkbc@gmail.com>
Reviewed-by: Vineet Gupta <Vineet.Gupta1@synopsys.com>
Acked-by: Matthew Fortune <Matthew.Fortune@imgtec.com>
Acked-by: Alexey Brodkin <Alexey.Brodkin@synopsys.com>

--

extract six-argument syscalls from the rest
use safe, even if possibly a few cycles slower, six-argument syscall implementation

Signed-off-by: mirabilos <m@mirbsd.org>
Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>

Change-Id: I3cabbe3768071c547d1b19eb9aa9360a72712aa3
scholzp pushed a commit to scholzp/l4re-core that referenced this issue Jun 5, 2024
@scholzp
uclibc/unused: Squashed changes for unused features
e954a70 
This commit collects the following upstream updates to uclibc-ng in
features that are not currently used by L4Re, such as the ARC and nds32
architectures or nptl:

add init_module/delete_module syscall wrappers
use multiline comment for better copyright parsing
nptl: remove pthread_attr_init/pthread_create weak aliases
nptl_db: fix gcc compiler warnings

--

fts: fix gcc compiler warning

Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>

--

ARC: ldso: don't use _DYNAMIC@gotpc construct kernkonzept#1
ARC: ldso: don't use _DYNAMIC@gotpc construct kernkonzept#2

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

--

nds32: add NPTL/TLS, *context function, libm changes and code cleanup

Signed-off-by: Vincent Ren-Wei Chen <vincentc@andestech.com>

--

remove PID caching

Reviewed-by: Max Filippov <jcmvbkbc@gmail.com>
Reviewed-by: Vineet Gupta <Vineet.Gupta1@synopsys.com>
Acked-by: Matthew Fortune <Matthew.Fortune@imgtec.com>
Acked-by: Alexey Brodkin <Alexey.Brodkin@synopsys.com>

--

extract six-argument syscalls from the rest
use safe, even if possibly a few cycles slower, six-argument syscall implementation

Signed-off-by: mirabilos <m@mirbsd.org>
Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>

Change-Id: I3cabbe3768071c547d1b19eb9aa9360a72712aa3
scholzp pushed a commit to scholzp/l4re-core that referenced this issue Jun 5, 2024
@scholzp
uclibc/unused: Squashed changes for unused features
ae0f5af 
This commit collects the following upstream updates to uclibc-ng in
features that are not currently used by L4Re, such as the ARC and nds32
architectures or nptl:

add init_module/delete_module syscall wrappers
use multiline comment for better copyright parsing
nptl: remove pthread_attr_init/pthread_create weak aliases
nptl_db: fix gcc compiler warnings

--

fts: fix gcc compiler warning

Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>

--

ARC: ldso: don't use _DYNAMIC@gotpc construct kernkonzept#1
ARC: ldso: don't use _DYNAMIC@gotpc construct kernkonzept#2

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

--

nds32: add NPTL/TLS, *context function, libm changes and code cleanup

Signed-off-by: Vincent Ren-Wei Chen <vincentc@andestech.com>

--

remove PID caching

Reviewed-by: Max Filippov <jcmvbkbc@gmail.com>
Reviewed-by: Vineet Gupta <Vineet.Gupta1@synopsys.com>
Acked-by: Matthew Fortune <Matthew.Fortune@imgtec.com>
Acked-by: Alexey Brodkin <Alexey.Brodkin@synopsys.com>

--

extract six-argument syscalls from the rest
use safe, even if possibly a few cycles slower, six-argument syscall implementation

Signed-off-by: mirabilos <m@mirbsd.org>
Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>

Change-Id: I3cabbe3768071c547d1b19eb9aa9360a72712aa3
scholzp pushed a commit to scholzp/l4re-core that referenced this issue Jun 5, 2024
@scholzp
uclibc/unused: Squashed changes for unused features
463c7a6 
This commit collects the following upstream updates to uclibc-ng in
features that are not currently used by L4Re, such as the ARC and nds32
architectures or nptl:

add init_module/delete_module syscall wrappers
use multiline comment for better copyright parsing
nptl: remove pthread_attr_init/pthread_create weak aliases
nptl_db: fix gcc compiler warnings

--

fts: fix gcc compiler warning

Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>

--

ARC: ldso: don't use _DYNAMIC@gotpc construct kernkonzept#1
ARC: ldso: don't use _DYNAMIC@gotpc construct kernkonzept#2

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

--

nds32: add NPTL/TLS, *context function, libm changes and code cleanup

Signed-off-by: Vincent Ren-Wei Chen <vincentc@andestech.com>

--

remove PID caching

Reviewed-by: Max Filippov <jcmvbkbc@gmail.com>
Reviewed-by: Vineet Gupta <Vineet.Gupta1@synopsys.com>
Acked-by: Matthew Fortune <Matthew.Fortune@imgtec.com>
Acked-by: Alexey Brodkin <Alexey.Brodkin@synopsys.com>

--

extract six-argument syscalls from the rest
use safe, even if possibly a few cycles slower, six-argument syscall implementation

Signed-off-by: mirabilos <m@mirbsd.org>
Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>

Change-Id: I3cabbe3768071c547d1b19eb9aa9360a72712aa3
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@lonvia @jermar @josephlr @icedieler