7dfceceea6 build: Remove #undef hack for ASM in the precomputation programs (Tim Ruffing)
bb36fe9be0 ci: Test `make precomp` (Tim Ruffing)
d94a37a20c build: Remove CC_FOR_BUILD stuff (Tim Ruffing)
ad63bb4c29 build: Prebuild and distribute ecmult_gen table (Tim Ruffing)
ac49361ed0 prealloc: Get rid of manual memory management for prealloc contexts (Tim Ruffing)
6573c08f65 ecmult_gen: Tidy precomputed file and save space (Tim Ruffing)
5eba83f17c ecmult_gen: Precompute tables for all values of ECMULT_GEN_PREC_BITS (Tim Ruffing)
fdb33dd122 refactor: Make PREC_BITS a parameter of ecmult_gen_build_prec_table (Tim Ruffing)
a4875e30a6 refactor: Move default callbacks to util.h (Tim Ruffing)
4c94c55bce doc: Remove obsolete hint for valgrind stack size (Tim Ruffing)
5106226991 exhaustive_tests: Fix with ecmult_gen table with custom generator (Tim Ruffing)
e1a76530db refactor: Make generator a parameter of ecmult_gen_create_prec_table (Tim Ruffing)
9ad09f6911 refactor: Rename program that generates static ecmult_gen table (Tim Ruffing)
8ae18f1ab3 refactor: Rename file that contains static ecmult_gen table (Tim Ruffing)
00d2fa116e ecmult_gen: Make code consistent with comment (Tim Ruffing)
3b0c2185ea ecmult_gen: Simplify ecmult_gen context after making table static (Tim Ruffing)
e43ba02cfc refactor: Decouple table generation and ecmult_gen context (Tim Ruffing)
22dc2c0a0d ecmult_gen: Move table creation to new file and force static prec (Tim Ruffing)
Pull request description:
This resolves#893, resolves#692 (and also resolvesbitcoin/bitcoin#22854).
- [x] Extract table generation to separate function in separate file (to be used by generation script and exhaustive tests)
- [x] Tidy up
- [x] Remove code that deals with non-static tables
- [x] Make functions that need ecmult_gen not depend on signing context
- [x] Rename stuff to make it fit the new structure and consistent with how we hande verification tables (#956)
- [x] Fix exhaustive tests
- [x] Make table generation function take generator as input
- [x] Overwrite the static tables with a table with custom generator in exhaustive tests
- [x] Overhaul script that generates table files
- [x] Make table generation function take PREC_BITS as input (I have some code already, just not yet in this branch)
- [x] Change generation script to generate three tables (for all three values of ECMULT_GEN_PREC_BITS)
- [x] Ship pre-built tables
- [x] Add pregenerated table file to repo
- [x] Remove generation of table file from build process (like in #956)
- [x] Remove left-over stuff (e.g., detecting a compiler running on the build machine) from build system
- [x] Final cleanups (copyright headers, commit, messages, etc.)
- [ ] (separate PR:) Make sure link-time optimization remove corresponding static tables (and code) when no signing/verifcation function is called
- [ ] (separate PR:) Compile precomputation as a separate object file and link it (https://github.com/bitcoin-core/secp256k1/pull/988#issuecomment-977813538)
- [ ] (separate PR:) Document the backwards-compatible API changes made in this PR and in #956.
- [ ] Maybe deprecate the static context
ACKs for top commit:
sipa:
ACK 7dfceceea6
robot-dreams:
ACK 7dfceceea6 (based on range-diff between 56284c7d44c0ed46e636588bfbf6c403b7dfa6c1 and 7dfceceea6)
Tree-SHA512: 6efb3f36f05efe3b79bbd877881fe1409f71fd6488d24c811b2e77d9f053bed78670dd1dcbb42ad780458a51c4ffa36de9cd6567271b22041dc7a122ceb677c5
Fixes one of the items in #923, namely the warnings of the form
'_putenv' redeclared without dllimport attribute:
previous dllimport ignored [-Wattributes]
This also cleans up the way we add CFLAGS, in particular flags enabling
warnings. Now we perform some more fine-grained checking for flag
support, which is not strictly necessary but the changes also help to
document autoconf.ac.
Valgrind is typically installed using brew on macOS. This commit
makes ./configure detect this case set the appropriate include
directory (in the same way as we already do for openssl and gmp).
Instead of supporting configuration of the field and scalar size independently,
both are now controlled by the availability of a 64x64->128 bit multiplication
(currently only through __int128). This is autodetected from the C code through
__SIZEOF_INT128__, but can be overridden using configure's
--with-test-override-wide-multiply, or by defining
USE_FORCE_WIDEMUL_{INT64,INT128} manually.
e7daa9b [build] Tweak JNI macro to warn instead of error for JNI not found. (Karl-Johan Alm)
5b22977 [build] Update ax_jni_include_dir.m4 macro to deal with recent versions of macOS (Karl-Johan Alm)
Pull request description:
Prior to this patch, this macro fails to find a working directory for the JNI headers, and results in compile failure when doing
```
./configure --enable-experimental --enable-module-ecdh --enable-jni
```
on more recent macOS versions. The relevant commit upstream is [here](http://git.savannah.gnu.org/gitweb/?p=autoconf-archive.git;a=commit;h=ab23d25b1f1ae544fffdaa0a94a794798695c672) from the [GNU.org page for the macro](https://www.gnu.org/software/autoconf-archive/ax_jni_include_dir.html). The original (identical to the version in this commit) is [here](http://git.savannah.gnu.org/gitweb/?p=autoconf-archive.git;a=blob_plain;f=m4/ax_jni_include_dir.m4).
The compile failure:
```Bash
$ make
gcc -I. -g -O2 -Wall -Wextra -Wno-unused-function -c src/gen_context.c -o gen_context.o
gcc gen_context.o -o gen_context
./gen_context
CC src/libsecp256k1_la-secp256k1.lo
CC src/java/libsecp256k1_jni_la-org_bitcoin_NativeSecp256k1.lo
In file included from src/java/org_bitcoin_NativeSecp256k1.c:4:
In file included from src/java/org_bitcoin_NativeSecp256k1.h:2:
/Library/Java/JavaVirtualMachines/jdk1.7.0_71.jdk/Contents/Headers/jni.h:45:10: fatal error:
'jni_md.h' file not found
#include "jni_md.h"
^
1 error generated.
make: *** [src/java/libsecp256k1_jni_la-org_bitcoin_NativeSecp256k1.lo] Error 1
```
Tree-SHA512: 9a8305b3ed67eba0de728f91cf435857a676ba10507ab8481a3c03b50e1ce0469a3d79e751d0a697018789f21e2aa48b7eccca4d225520a3863fcf23f1fd487a
The only reason OpenSSL 1.1 was not supported was the removal of direct
access to r and s in ECDSA_SIG. This commit adds a simplified version of
ECDSA_SIG_get0 for < 1.1 that can be used like ECDSA_SIG_get0 in >= 1.1
OpenSSL 1.1 makes ECDSA_SIG opaque and our tests need access
inside this object.
The comparison tests against OpenSSL aren't important for most
users, but the build failing is...
Squashed and rebased. Thanks to @theuni and @faizkhan00 for doing
the majority of work here! Also thanks to @btchip for help with debugging
and review.
I Noticed this on OSX with clang, though it likely happens elsewhere as well.
The result is disabled x86_64 asm.
Due to missing escaping, this $0 was interpreted as the function name
SECP_64BIT_ASM_CHECK, causing the compile-check to be broken on some compilers.
The actual check looked like this:
int main()
{
uint64_t a = 11, tmp;
__asm__ __volatile__("movq SECP_64BIT_ASM_CHECKx100000000,%1; mulq %%rsi" : "+a"(a) : "S"(tmp) : "cc", "%rdx");
return 0;
}
It seems even more odd that it compiled anywhere.
This vastly shrinks the size of the context required for signing on devices with
memory-mapped Flash.
Tables are generated by the new gen_context tool into a header.
Tim Ruffing
Hennadii Stepanov
Pieter Wuille
Dimitris Apostolou
Elichai Turkel
fanquake
Jonas Nick
Gregory Maxwell
Alexander Block
Karl-Johan Alm
Pieter Wuille
GreenAddress
Cory Fields
Thomas Daede
Luke Dashjr
kiwigb