nettle-bugs July 2024

nettle-bugs@lists.lysator.liu.se

3 participants
2 discussions

[PATCH 1/2] powerpc64: remove use of m4_unquote in the load step for sha256
by Eric Richter 25 Aug '24

25 Aug '24

By passing in the constant offset value into the LOAD macro, the use of m4_unquote to calculate the correct constant GPR can be avoided, improving readability. Signed-off-by: Eric Richter <erichte(a)linux.ibm.com> --- powerpc64/p8/sha256-compress-n.asm | 36 +++++++++++++++--------------- 1 file changed, 18 insertions(+), 18 deletions(-) diff --git a/powerpc64/p8/sha256-compress-n.asm b/powerpc64/p8/sha256-compress-n.asm index 4848461e..309db1fa 100644 --- a/powerpc64/p8/sha256-compress-n.asm +++ b/powerpc64/p8/sha256-compress-n.asm @@ -177,34 +177,34 @@ define(`EXTENDROUNDS', ` ') define(`LOAD', ` - IF_BE(`lxvw4x VSR(IV($1)), m4_unquote(TC`'eval(($1 % 4) * 4)), INPUT') + IF_BE(`lxvw4x VSR(IV($1)), $2, INPUT') IF_LE(` - lxvd2x VSR(IV($1)), m4_unquote(TC`'eval(($1 % 4) * 4)), INPUT + lxvd2x VSR(IV($1)), $2, INPUT vperm IV($1), IV($1), IV($1), VT0 ') ') define(`DOLOADS', ` IF_LE(`DATA_LOAD_VEC(VT0, .load_swap, T1)') - LOAD(0) - LOAD(1) - LOAD(2) - LOAD(3) + LOAD(0, TC0) + LOAD(1, TC4) + LOAD(2, TC8) + LOAD(3, TC12) addi INPUT, INPUT, 16 - LOAD(4) - LOAD(5) - LOAD(6) - LOAD(7) + LOAD(4, TC0) + LOAD(5, TC4) + LOAD(6, TC8) + LOAD(7, TC12) addi INPUT, INPUT, 16 - LOAD(8) - LOAD(9) - LOAD(10) - LOAD(11) + LOAD(8, TC0) + LOAD(9, TC4) + LOAD(10, TC8) + LOAD(11, TC12) addi INPUT, INPUT, 16 - LOAD(12) - LOAD(13) - LOAD(14) - LOAD(15) + LOAD(12, TC0) + LOAD(13, TC4) + LOAD(14, TC8) + LOAD(15, TC12) addi INPUT, INPUT, 16 ') -- 2.45.2

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nettle: PACBTI for arm64 assembly
by Daiki Ueno 23 Jul '24

23 Jul '24

Hello, The attached is my attempt to enable PAC/BTI[1] support for AArch64. As the Nettle assembly files only define leaf functions (i.e., no subroutine calls with LR/SP save/restore), PAC is not applicable and thus only BTI is enabled for now. To test, I used the mock[2] environment with the fedora-40-aarch64 configuration: $ mock -r fedora-40-aarch64 --init <mock-chroot> sh-5.2# ./.bootstrap <mock-chroot> sh-5.2# ./configure --disable-documentation CFLAGS="-mbranch-protection=standard" <mock-chroot> sh-5.2# make -j$(nproc) <mock-chroot> sh-5.2# readelf -n libnettle.so Displaying notes found in: .note.gnu.property Owner Data size Description GNU 0x00000010 NT_GNU_PROPERTY_TYPE_0 Properties: AArch64 feature: BTI, PAC ... Regards, Footnotes: [1] https://wiki.debian.org/ToolChain/PACBTI [2] https://fedoraproject.org/wiki/Using_Mock_to_test_package_builds -- Daiki Ueno

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nettle-bugs July 2024