mirror of
https://github.com/apache/nuttx.git
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docs: Update the ELF guides
Rewrite parts of the two ELF guides to use scripts included in the export archive and modernize some deprecated tools and Bash idioms. Also add the new sphinx_collapse extension to the docs build config. Signed-off-by: Niccolò Maggioni <nicco.maggioni+nuttx@gmail.com>
This commit is contained in:
Niccolò Maggioni
committed by
Xiang Xiao
Xiang Xiao
parent
d651726b57
commit
2399702a28
@@ -17,3 +17,4 @@ pytz = "*"
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importlib-metadata = "*"
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sphinx-tags = "*"
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sphinx-design = "*"
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sphinx-collapse = "*"
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637
Documentation/Pipfile.lock
generated
637
Documentation/Pipfile.lock
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@@ -1,7 +1,7 @@
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{
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"_meta": {
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"hash": {
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"sha256": "b44a6fa5a78afb4aaa44d290055bf273d4765907a822f399858891c57a2cdc7d"
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"sha256": "9e0b756323757643515c417299f5a8cc7587c39771b4634cb2b506c6c2100387"
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},
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"pipfile-spec": 6,
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"requires": {},
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@@ -24,146 +24,133 @@
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},
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"anyio": {
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"markers": "python_version >= '3.9'",
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"version": "==4.6.2.post1"
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"version": "==4.9.0"
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},
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"babel": {
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"markers": "python_version >= '3.8'",
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"version": "==2.16.0"
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"version": "==2.17.0"
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"markers": "python_version >= '3.6'",
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"version": "==2024.8.30"
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"version": "==2025.4.26"
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"sha256:50bf98d5e563b83cc29471fa114366e6806bc06bc7a25fd59641e41445327836",
|
||||
"sha256:5a9979887252a82fefd3d3ed2a8e3b937a7a809f65dcb1e068b090e165bbe99e",
|
||||
"sha256:5baececa9ecba31eff645232d59845c07aa030f0c81ee70184a90d35099a0e63",
|
||||
"sha256:5bf4545e3b962767e5c06fe1738f951f77d27967cb2caa64c28be7c4563e162c",
|
||||
"sha256:6333b3aa5a12c26b2a4d4e7335a28f1475e0e5e17d69d55141ee3cab736f66d1",
|
||||
"sha256:65c981bdbd3f57670af8b59777cbfae75364b483fa8a9f420f08094531d54a01",
|
||||
"sha256:68a328e5f55ec37c57f19ebb1fdc56a248db2e3e9ad769919a58672958e8f366",
|
||||
"sha256:6a0289e4589e8bdfef02a80478f1dfcb14f0ab696b5a00e1f4b8a14a307a3c58",
|
||||
"sha256:6b66f92b17849b85cad91259efc341dce9c1af48e2173bf38a85c6329f1033e5",
|
||||
"sha256:6c9379d65defcab82d07b2a9dfbfc2e95bc8fe0ebb1b176a3190230a3ef0e07c",
|
||||
"sha256:6fc1f5b51fa4cecaa18f2bd7a003f3dd039dd615cd69a2afd6d3b19aed6775f2",
|
||||
"sha256:70f7172939fdf8790425ba31915bfbe8335030f05b9913d7ae00a87d4395620a",
|
||||
"sha256:721c76e84fe669be19c5791da68232ca2e05ba5185575086e384352e2c309597",
|
||||
"sha256:7222ffd5e4de8e57e03ce2cef95a4c43c98fcb72ad86909abdfc2c17d227fc1b",
|
||||
"sha256:75d10d37a47afee94919c4fab4c22b9bc2a8bf7d4f46f87363bcf0573f3ff4f5",
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||||
"sha256:76af085e67e56c8816c3ccf256ebd136def2ed9654525348cfa744b6802b69eb",
|
||||
"sha256:770cab594ecf99ae64c236bc9ee3439c3f46be49796e265ce0cc8bc17b10294f",
|
||||
"sha256:7a6ab32f7210554a96cd9e33abe3ddd86732beeafc7a28e9955cdf22ffadbab0",
|
||||
"sha256:7c48ed483eb946e6c04ccbe02c6b4d1d48e51944b6db70f697e089c193404941",
|
||||
"sha256:7f56930ab0abd1c45cd15be65cc741c28b1c9a34876ce8c17a2fa107810c0af0",
|
||||
"sha256:8075c35cd58273fee266c58c0c9b670947c19df5fb98e7b66710e04ad4e9ff86",
|
||||
"sha256:8272b73e1c5603666618805fe821edba66892e2870058c94c53147602eab29c7",
|
||||
"sha256:82d8fd25b7f4675d0c47cf95b594d4e7b158aca33b76aa63d07186e13c0e0ab7",
|
||||
"sha256:844da2b5728b5ce0e32d863af26f32b5ce61bc4273a9c720a9f3aa9df73b1455",
|
||||
"sha256:8755483f3c00d6c9a77f490c17e6ab0c8729e39e6390328e42521ef175380ae6",
|
||||
"sha256:915f3849a011c1f593ab99092f3cecfcb4d65d8feb4a64cf1bf2d22074dc0ec4",
|
||||
"sha256:926ca93accd5d36ccdabd803392ddc3e03e6d4cd1cf17deff3b989ab8e9dbcf0",
|
||||
"sha256:982bb1e8b4ffda883b3d0a521e23abcd6fd17418f6d2c4118d257a10199c0ce3",
|
||||
"sha256:98f862da73774290f251b9df8d11161b6cf25b599a66baf087c1ffe340e9bfd1",
|
||||
"sha256:9cbfacf36cb0ec2897ce0ebc5d08ca44213af24265bd56eca54bee7923c48fd6",
|
||||
"sha256:a370b3e078e418187da8c3674eddb9d983ec09445c99a3a263c2011993522981",
|
||||
"sha256:a955b438e62efdf7e0b7b52a64dc5c3396e2634baa62471768a64bc2adb73d5c",
|
||||
"sha256:aa6af9e7d59f9c12b33ae4e9450619cf2488e2bbe9b44030905877f0b2324980",
|
||||
"sha256:aa88ca0b1932e93f2d961bf3addbb2db902198dca337d88c89e1559e066e7645",
|
||||
"sha256:aaeeb6a479c7667fbe1099af9617c83aaca22182d6cf8c53966491a0f1b7ffb7",
|
||||
"sha256:aaf27faa992bfee0264dc1f03f4c75e9fcdda66a519db6b957a3f826e285cf12",
|
||||
"sha256:b2680962a4848b3c4f155dc2ee64505a9c57186d0d56b43123b17ca3de18f0fa",
|
||||
"sha256:b2d318c11350e10662026ad0eb71bb51c7812fc8590825304ae0bdd4ac283acd",
|
||||
"sha256:b33de11b92e9f75a2b545d6e9b6f37e398d86c3e9e9653c4864eb7e89c5773ef",
|
||||
"sha256:b3daeac64d5b371dea99714f08ffc2c208522ec6b06fbc7866a450dd446f5c0f",
|
||||
"sha256:be1e352acbe3c78727a16a455126d9ff83ea2dfdcbc83148d2982305a04714c2",
|
||||
"sha256:bee093bf902e1d8fc0ac143c88902c3dfc8941f7ea1d6a8dd2bcb786d33db03d",
|
||||
"sha256:c72fbbe68c6f32f251bdc08b8611c7b3060612236e960ef848e0a517ddbe76c5",
|
||||
"sha256:c9e36a97bee9b86ef9a1cf7bb96747eb7a15c2f22bdb5b516434b00f2a599f02",
|
||||
"sha256:cddf7bd982eaa998934a91f69d182aec997c6c468898efe6679af88283b498d3",
|
||||
"sha256:cf713fe9a71ef6fd5adf7a79670135081cd4431c2943864757f0fa3a65b1fafd",
|
||||
"sha256:d11b54acf878eef558599658b0ffca78138c8c3655cf4f3a4a673c437e67732e",
|
||||
"sha256:d41c4d287cfc69060fa91cae9683eacffad989f1a10811995fa309df656ec214",
|
||||
"sha256:d524ba3f1581b35c03cb42beebab4a13e6cdad7b36246bd22541fa585a56cccd",
|
||||
"sha256:daac4765328a919a805fa5e2720f3e94767abd632ae410a9062dff5412bae65a",
|
||||
"sha256:db4c7bf0e07fc3b7d89ac2a5880a6a8062056801b83ff56d8464b70f65482b6c",
|
||||
"sha256:dc7039885fa1baf9be153a0626e337aa7ec8bf96b0128605fb0d77788ddc1681",
|
||||
"sha256:dccab8d5fa1ef9bfba0590ecf4d46df048d18ffe3eec01eeb73a42e0d9e7a8ba",
|
||||
"sha256:dedb8adb91d11846ee08bec4c8236c8549ac721c245678282dcb06b221aab59f",
|
||||
"sha256:e45ba65510e2647721e35323d6ef54c7974959f6081b58d4ef5d87c60c84919a",
|
||||
"sha256:e53efc7c7cee4c1e70661e2e112ca46a575f90ed9ae3fef200f2a25e954f4b28",
|
||||
"sha256:e635b87f01ebc977342e2697d05b56632f5f879a4f15955dfe8cef2448b51691",
|
||||
"sha256:e70e990b2137b29dc5564715de1e12701815dacc1d056308e2b17e9095372a82",
|
||||
"sha256:e8082b26888e2f8b36a042a58307d5b917ef2b1cacab921ad3323ef91901c71a",
|
||||
"sha256:e8323a9b031aa0393768b87f04b4164a40037fb2a3c11ac06a03ffecd3618027",
|
||||
"sha256:e92fca20c46e9f5e1bb485887d074918b13543b1c2a1185e69bb8d17ab6236a7",
|
||||
"sha256:eb30abc20df9ab0814b5a2524f23d75dcf83cde762c161917a2b4b7b55b1e518",
|
||||
"sha256:eba9904b0f38a143592d9fc0e19e2df0fa2e41c3c3745554761c5f6447eedabf",
|
||||
"sha256:ef8de666d6179b009dce7bcb2ad4c4a779f113f12caf8dc77f0162c29d20490b",
|
||||
"sha256:efd387a49825780ff861998cd959767800d54f8308936b21025326de4b5a42b9",
|
||||
"sha256:f0aa37f3c979cf2546b73e8222bbfa3dc07a641585340179d768068e3455e544",
|
||||
"sha256:f4074c5a429281bf056ddd4c5d3b740ebca4d43ffffe2ef4bf4d2d05114299da",
|
||||
"sha256:f69a27e45c43520f5487f27627059b64aaf160415589230992cec34c5e18a509",
|
||||
"sha256:fb707f3e15060adf5b7ada797624a6c6e0138e2a26baa089df64c68ee98e040f",
|
||||
"sha256:fcbe676a55d7445b22c10967bceaaf0ee69407fbe0ece4d032b6eb8d4565982a",
|
||||
"sha256:fdb20a30fe1175ecabed17cbf7812f7b804b8a315a25f24678bcdf120a90077f"
|
||||
],
|
||||
"markers": "python_full_version >= '3.7.0'",
|
||||
"version": "==3.4.0"
|
||||
"markers": "python_version >= '3.7'",
|
||||
"version": "==3.4.2"
|
||||
},
|
||||
"click": {
|
||||
"hashes": [
|
||||
"sha256:ae74fb96c20a0277a1d615f1e4d73c8414f5a98db8b799a7931d1582f3390c28",
|
||||
"sha256:ca9853ad459e787e2192211578cc907e7594e294c7ccc834310722b41b9ca6de"
|
||||
"sha256:27c491cc05d968d271d5a1db13e3b5a184636d9d930f148c50b038f0d0646202",
|
||||
"sha256:61a3265b914e850b85317d0b3109c7f8cd35a670f963866005d6ef1d5175a12b"
|
||||
],
|
||||
"markers": "python_version >= '3.7'",
|
||||
"version": "==8.1.7"
|
||||
"markers": "python_version >= '3.10'",
|
||||
"version": "==8.2.1"
|
||||
},
|
||||
"colorama": {
|
||||
"hashes": [
|
||||
@@ -184,11 +171,11 @@
|
||||
},
|
||||
"h11": {
|
||||
"hashes": [
|
||||
"sha256:8f19fbbe99e72420ff35c00b27a34cb9937e902a8b810e2c88300c6f0a3b699d",
|
||||
"sha256:e3fe4ac4b851c468cc8363d500db52c2ead036020723024a109d37346efaa761"
|
||||
"sha256:4e35b956cf45792e4caa5885e69fba00bdbc6ffafbfa020300e549b208ee5ff1",
|
||||
"sha256:63cf8bbe7522de3bf65932fda1d9c2772064ffb3dae62d55932da54b31cb6c86"
|
||||
],
|
||||
"markers": "python_version >= '3.7'",
|
||||
"version": "==0.14.0"
|
||||
"markers": "python_version >= '3.8'",
|
||||
"version": "==0.16.0"
|
||||
},
|
||||
"idna": {
|
||||
"hashes": [
|
||||
@@ -208,20 +195,20 @@
|
||||
},
|
||||
"importlib-metadata": {
|
||||
"hashes": [
|
||||
"sha256:45e54197d28b7a7f1559e60b95e7c567032b602131fbd588f1497f47880aa68b",
|
||||
"sha256:71522656f0abace1d072b9e5481a48f07c138e00f079c38c8f883823f9c26bd7"
|
||||
"sha256:d13b81ad223b890aa16c5471f2ac3056cf76c5f10f82d6f9292f0b415f389000",
|
||||
"sha256:e5dd1551894c77868a30651cef00984d50e1002d06942a7101d34870c5f02afd"
|
||||
],
|
||||
"index": "pypi",
|
||||
"markers": "python_version >= '3.8'",
|
||||
"version": "==8.5.0"
|
||||
"markers": "python_version >= '3.9'",
|
||||
"version": "==8.7.0"
|
||||
},
|
||||
"jinja2": {
|
||||
"hashes": [
|
||||
"sha256:4a3aee7acbbe7303aede8e9648d13b8bf88a429282aa6122a993f0ac800cb369",
|
||||
"sha256:bc5dd2abb727a5319567b7a813e6a2e7318c39f4f487cfe6c89c6f9c7d25197d"
|
||||
"sha256:0137fb05990d35f1275a587e9aee6d56da821fc83491a0fb838183be43f66d6d",
|
||||
"sha256:85ece4451f492d0c13c5dd7c13a64681a86afae63a5f347908daf103ce6d2f67"
|
||||
],
|
||||
"markers": "python_version >= '3.7'",
|
||||
"version": "==3.1.4"
|
||||
"version": "==3.1.6"
|
||||
},
|
||||
"markdown-it-py": {
|
||||
"hashes": [
|
||||
@@ -295,7 +282,6 @@
|
||||
"sha256:f8b3d067f2e40fe93e1ccdd6b2e1d16c43140e76f02fb1319a05cf2b79d99430",
|
||||
"sha256:fcabf5ff6eea076f859677f5f0b6b5c1a51e70a376b0579e0eadef8db48c6b50"
|
||||
],
|
||||
"index": "pypi",
|
||||
"markers": "python_version >= '3.9'",
|
||||
"version": "==3.0.2"
|
||||
},
|
||||
@@ -326,27 +312,27 @@
|
||||
},
|
||||
"packaging": {
|
||||
"hashes": [
|
||||
"sha256:09abb1bccd265c01f4a3aa3f7a7db064b36514d2cba19a2f694fe6150451a759",
|
||||
"sha256:c228a6dc5e932d346bc5739379109d49e8853dd8223571c7c5b55260edc0b97f"
|
||||
"sha256:29572ef2b1f17581046b3a2227d5c611fb25ec70ca1ba8554b24b0e69331a484",
|
||||
"sha256:d443872c98d677bf60f6a1f2f8c1cb748e8fe762d2bf9d3148b5599295b0fc4f"
|
||||
],
|
||||
"markers": "python_version >= '3.8'",
|
||||
"version": "==24.2"
|
||||
"version": "==25.0"
|
||||
},
|
||||
"pygments": {
|
||||
"hashes": [
|
||||
"sha256:786ff802f32e91311bff3889f6e9a86e81505fe99f2735bb6d60ae0c5004f199",
|
||||
"sha256:b8e6aca0523f3ab76fee51799c488e38782ac06eafcf95e7ba832985c8e7b13a"
|
||||
"sha256:61c16d2a8576dc0649d9f39e089b5f02bcd27fba10d8fb4dcc28173f7a45151f",
|
||||
"sha256:9ea1544ad55cecf4b8242fab6dd35a93bbce657034b0611ee383099054ab6d8c"
|
||||
],
|
||||
"markers": "python_version >= '3.8'",
|
||||
"version": "==2.18.0"
|
||||
"version": "==2.19.1"
|
||||
},
|
||||
"pytz": {
|
||||
"hashes": [
|
||||
"sha256:2aa355083c50a0f93fa581709deac0c9ad65cca8a9e9beac660adcbd493c798a",
|
||||
"sha256:31c7c1817eb7fae7ca4b8c7ee50c72f93aa2dd863de768e1ef4245d426aa0725"
|
||||
"sha256:360b9e3dbb49a209c21ad61809c7fb453643e048b38924c765813546746e81c3",
|
||||
"sha256:5ddf76296dd8c44c26eb8f4b6f35488f3ccbf6fbbd7adee0b7262d43f0ec2f00"
|
||||
],
|
||||
"index": "pypi",
|
||||
"version": "==2024.2"
|
||||
"version": "==2025.2"
|
||||
},
|
||||
"pyyaml": {
|
||||
"hashes": [
|
||||
@@ -409,11 +395,11 @@
|
||||
},
|
||||
"requests": {
|
||||
"hashes": [
|
||||
"sha256:55365417734eb18255590a9ff9eb97e9e1da868d4ccd6402399eaf68af20a760",
|
||||
"sha256:70761cfe03c773ceb22aa2f671b4757976145175cdfca038c02654d061d6dcc6"
|
||||
"sha256:27babd3cda2a6d50b30443204ee89830707d396671944c998b5975b031ac2b2c",
|
||||
"sha256:27d0316682c8a29834d3264820024b62a36942083d52caf2f14c0591336d3422"
|
||||
],
|
||||
"markers": "python_version >= '3.8'",
|
||||
"version": "==2.32.3"
|
||||
"version": "==2.32.4"
|
||||
},
|
||||
"sniffio": {
|
||||
"hashes": [
|
||||
@@ -425,10 +411,11 @@
|
||||
},
|
||||
"snowballstemmer": {
|
||||
"hashes": [
|
||||
"sha256:09b16deb8547d3412ad7b590689584cd0fe25ec8db3be37788be3810cbf19cb1",
|
||||
"sha256:c8e1716e83cc398ae16824e5572ae04e0d9fc2c6b985fb0f900f5f0c96ecba1a"
|
||||
"sha256:6cd7b3897da8d6c9ffb968a6781fa6532dce9c3618a4b127d920dab764a19064",
|
||||
"sha256:6d5eeeec8e9f84d4d56b847692bacf79bc2c8e90c7f80ca4444ff8b6f2e52895"
|
||||
],
|
||||
"version": "==2.2.0"
|
||||
"markers": "python_version not in '3.0, 3.1, 3.2'",
|
||||
"version": "==3.0.1"
|
||||
},
|
||||
"sphinx": {
|
||||
"hashes": [
|
||||
@@ -448,6 +435,15 @@
|
||||
"markers": "python_version >= '3.9'",
|
||||
"version": "==2024.10.3"
|
||||
},
|
||||
"sphinx-collapse": {
|
||||
"hashes": [
|
||||
"sha256:85fadb2ec8769b93fd04276538668fa96239ef60c20c4a9eaa3e480387a6e65b",
|
||||
"sha256:cae141e6f03ecd52ed246a305a69e1b0d5d05e6cdf3fe803d40d583ad6ad895a"
|
||||
],
|
||||
"index": "pypi",
|
||||
"markers": "python_version >= '3.7'",
|
||||
"version": "==0.1.3"
|
||||
},
|
||||
"sphinx-copybutton": {
|
||||
"hashes": [
|
||||
"sha256:4cf17c82fb9646d1bc9ca92ac280813a3b605d8c421225fd9913154103ee1fbd",
|
||||
@@ -457,6 +453,15 @@
|
||||
"markers": "python_version >= '3.7'",
|
||||
"version": "==0.5.2"
|
||||
},
|
||||
"sphinx-design": {
|
||||
"hashes": [
|
||||
"sha256:b11f37db1a802a183d61b159d9a202314d4d2fe29c163437001324fe2f19549c",
|
||||
"sha256:b44eea3719386d04d765c1a8257caca2b3e6f8421d7b3a5e742c0fd45f84e632"
|
||||
],
|
||||
"index": "pypi",
|
||||
"markers": "python_version >= '3.9'",
|
||||
"version": "==0.6.1"
|
||||
},
|
||||
"sphinx-rtd-theme": {
|
||||
"hashes": [
|
||||
"sha256:422ccc750c3a3a311de4ae327e82affdaf59eb695ba4936538552f3b00f4ee13",
|
||||
@@ -475,6 +480,14 @@
|
||||
"markers": "python_version >= '3.7'",
|
||||
"version": "==3.4.7"
|
||||
},
|
||||
"sphinx-tags": {
|
||||
"hashes": [
|
||||
"sha256:3065219bacf47567c706f2237d5665b22f3a5167367b4c4568bcda4371a5359d",
|
||||
"sha256:af31203fe4e0ebd39cb95d4fef38720185def6af9fdb921b70275ff659a5dac5"
|
||||
],
|
||||
"index": "pypi",
|
||||
"version": "==0.4"
|
||||
},
|
||||
"sphinxcontrib-applehelp": {
|
||||
"hashes": [
|
||||
"sha256:2f29ef331735ce958efa4734873f084941970894c6090408b079c61b2e1c06d1",
|
||||
@@ -533,199 +546,187 @@
|
||||
},
|
||||
"starlette": {
|
||||
"hashes": [
|
||||
"sha256:0e4ab3d16522a255be6b28260b938eae2482f98ce5cc934cb08dce8dc3ba5835",
|
||||
"sha256:44cedb2b7c77a9de33a8b74b2b90e9f50d11fcf25d8270ea525ad71a25374ff7"
|
||||
"sha256:1f64887e94a447fed5f23309fb6890ef23349b7e478faa7b24a851cd4eb844af",
|
||||
"sha256:9d052d4933683af40ffd47c7465433570b4949dc937e20ad1d73b34e72f10c37"
|
||||
],
|
||||
"markers": "python_version >= '3.8'",
|
||||
"version": "==0.41.3"
|
||||
"markers": "python_version >= '3.9'",
|
||||
"version": "==0.47.0"
|
||||
},
|
||||
"urllib3": {
|
||||
"hashes": [
|
||||
"sha256:ca899ca043dcb1bafa3e262d73aa25c465bfb49e0bd9dd5d59f1d0acba2f8fac",
|
||||
"sha256:e7d814a81dad81e6caf2ec9fdedb284ecc9c73076b62654547cc64ccdcae26e9"
|
||||
"sha256:414bc6535b787febd7567804cc015fee39daab8ad86268f1310a9250697de466",
|
||||
"sha256:4e16665048960a0900c702d4a66415956a584919c03361cac9f1df5c5dd7e813"
|
||||
],
|
||||
"markers": "python_version >= '3.8'",
|
||||
"version": "==2.2.3"
|
||||
"markers": "python_version >= '3.9'",
|
||||
"version": "==2.4.0"
|
||||
},
|
||||
"uvicorn": {
|
||||
"hashes": [
|
||||
"sha256:82ad92fd58da0d12af7482ecdb5f2470a04c9c9a53ced65b9bbb4a205377602e",
|
||||
"sha256:ee9519c246a72b1c084cea8d3b44ed6026e78a4a309cbedae9c37e4cb9fbb175"
|
||||
"sha256:16246631db62bdfbf069b0645177d6e8a77ba950cfedbfd093acef9444e4d885",
|
||||
"sha256:35919a9a979d7a59334b6b10e05d77c1d0d574c50e0fc98b8b1a0f165708b55a"
|
||||
],
|
||||
"markers": "python_version >= '3.8'",
|
||||
"version": "==0.32.1"
|
||||
"markers": "python_version >= '3.9'",
|
||||
"version": "==0.34.3"
|
||||
},
|
||||
"watchfiles": {
|
||||
"hashes": [
|
||||
"sha256:01550ccf1d0aed6ea375ef259706af76ad009ef5b0203a3a4cce0f6024f9b68a",
|
||||
"sha256:01def80eb62bd5db99a798d5e1f5f940ca0a05986dcfae21d833af7a46f7ee22",
|
||||
"sha256:07cdef0c84c03375f4e24642ef8d8178e533596b229d32d2bbd69e5128ede02a",
|
||||
"sha256:083dc77dbdeef09fa44bb0f4d1df571d2e12d8a8f985dccde71ac3ac9ac067a0",
|
||||
"sha256:1cf1f6dd7825053f3d98f6d33f6464ebdd9ee95acd74ba2c34e183086900a827",
|
||||
"sha256:21ab23fdc1208086d99ad3f69c231ba265628014d4aed31d4e8746bd59e88cd1",
|
||||
"sha256:2dadf8a8014fde6addfd3c379e6ed1a981c8f0a48292d662e27cabfe4239c83c",
|
||||
"sha256:2e28d91ef48eab0afb939fa446d8ebe77e2f7593f5f463fd2bb2b14132f95b6e",
|
||||
"sha256:2efec17819b0046dde35d13fb8ac7a3ad877af41ae4640f4109d9154ed30a188",
|
||||
"sha256:30bbd525c3262fd9f4b1865cb8d88e21161366561cd7c9e1194819e0a33ea86b",
|
||||
"sha256:316449aefacf40147a9efaf3bd7c9bdd35aaba9ac5d708bd1eb5763c9a02bef5",
|
||||
"sha256:327763da824817b38ad125dcd97595f942d720d32d879f6c4ddf843e3da3fe90",
|
||||
"sha256:32aa53a9a63b7f01ed32e316e354e81e9da0e6267435c7243bf8ae0f10b428ef",
|
||||
"sha256:34e19e56d68b0dad5cff62273107cf5d9fbaf9d75c46277aa5d803b3ef8a9e9b",
|
||||
"sha256:3770e260b18e7f4e576edca4c0a639f704088602e0bc921c5c2e721e3acb8d15",
|
||||
"sha256:3d2e3ab79a1771c530233cadfd277fcc762656d50836c77abb2e5e72b88e3a48",
|
||||
"sha256:41face41f036fee09eba33a5b53a73e9a43d5cb2c53dad8e61fa6c9f91b5a51e",
|
||||
"sha256:43e3e37c15a8b6fe00c1bce2473cfa8eb3484bbeecf3aefbf259227e487a03df",
|
||||
"sha256:449f43f49c8ddca87c6b3980c9284cab6bd1f5c9d9a2b00012adaaccd5e7decd",
|
||||
"sha256:4933a508d2f78099162da473841c652ad0de892719043d3f07cc83b33dfd9d91",
|
||||
"sha256:49d617df841a63b4445790a254013aea2120357ccacbed00253f9c2b5dc24e2d",
|
||||
"sha256:49fb58bcaa343fedc6a9e91f90195b20ccb3135447dc9e4e2570c3a39565853e",
|
||||
"sha256:4a7fa2bc0efef3e209a8199fd111b8969fe9db9c711acc46636686331eda7dd4",
|
||||
"sha256:4abf4ad269856618f82dee296ac66b0cd1d71450fc3c98532d93798e73399b7a",
|
||||
"sha256:4b8693502d1967b00f2fb82fc1e744df128ba22f530e15b763c8d82baee15370",
|
||||
"sha256:4d28cea3c976499475f5b7a2fec6b3a36208656963c1a856d328aeae056fc5c1",
|
||||
"sha256:5148c2f1ea043db13ce9b0c28456e18ecc8f14f41325aa624314095b6aa2e9ea",
|
||||
"sha256:54ca90a9ae6597ae6dc00e7ed0a040ef723f84ec517d3e7ce13e63e4bc82fa04",
|
||||
"sha256:551ec3ee2a3ac9cbcf48a4ec76e42c2ef938a7e905a35b42a1267fa4b1645896",
|
||||
"sha256:5c51749f3e4e269231510da426ce4a44beb98db2dce9097225c338f815b05d4f",
|
||||
"sha256:632676574429bee8c26be8af52af20e0c718cc7f5f67f3fb658c71928ccd4f7f",
|
||||
"sha256:6509ed3f467b79d95fc62a98229f79b1a60d1b93f101e1c61d10c95a46a84f43",
|
||||
"sha256:6bdcfa3cd6fdbdd1a068a52820f46a815401cbc2cb187dd006cb076675e7b735",
|
||||
"sha256:7138eff8baa883aeaa074359daabb8b6c1e73ffe69d5accdc907d62e50b1c0da",
|
||||
"sha256:7211b463695d1e995ca3feb38b69227e46dbd03947172585ecb0588f19b0d87a",
|
||||
"sha256:73bde715f940bea845a95247ea3e5eb17769ba1010efdc938ffcb967c634fa61",
|
||||
"sha256:78470906a6be5199524641f538bd2c56bb809cd4bf29a566a75051610bc982c3",
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||||
"sha256:7ae3e208b31be8ce7f4c2c0034f33406dd24fbce3467f77223d10cd86778471c",
|
||||
"sha256:7e4bd963a935aaf40b625c2499f3f4f6bbd0c3776f6d3bc7c853d04824ff1c9f",
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||||
"sha256:82ae557a8c037c42a6ef26c494d0631cacca040934b101d001100ed93d43f361",
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||||
"sha256:82b2509f08761f29a0fdad35f7e1638b8ab1adfa2666d41b794090361fb8b855",
|
||||
"sha256:8360f7314a070c30e4c976b183d1d8d1585a4a50c5cb603f431cebcbb4f66327",
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||||
"sha256:85d5f0c7771dcc7a26c7a27145059b6bb0ce06e4e751ed76cdf123d7039b60b5",
|
||||
"sha256:88bcd4d0fe1d8ff43675360a72def210ebad3f3f72cabfeac08d825d2639b4ab",
|
||||
"sha256:9301c689051a4857d5b10777da23fafb8e8e921bcf3abe6448a058d27fb67633",
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||||
"sha256:951088d12d339690a92cef2ec5d3cfd957692834c72ffd570ea76a6790222777",
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||||
"sha256:95cf3b95ea665ab03f5a54765fa41abf0529dbaf372c3b83d91ad2cfa695779b",
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||||
"sha256:96619302d4374de5e2345b2b622dc481257a99431277662c30f606f3e22f42be",
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||||
"sha256:999928c6434372fde16c8f27143d3e97201160b48a614071261701615a2a156f",
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||||
"sha256:9a60e2bf9dc6afe7f743e7c9b149d1fdd6dbf35153c78fe3a14ae1a9aee3d98b",
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||||
"sha256:9f895d785eb6164678ff4bb5cc60c5996b3ee6df3edb28dcdeba86a13ea0465e",
|
||||
"sha256:a2a9891723a735d3e2540651184be6fd5b96880c08ffe1a98bae5017e65b544b",
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||||
"sha256:a974231b4fdd1bb7f62064a0565a6b107d27d21d9acb50c484d2cdba515b9366",
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||||
"sha256:aa0fd7248cf533c259e59dc593a60973a73e881162b1a2f73360547132742823",
|
||||
"sha256:acbfa31e315a8f14fe33e3542cbcafc55703b8f5dcbb7c1eecd30f141df50db3",
|
||||
"sha256:afb72325b74fa7a428c009c1b8be4b4d7c2afedafb2982827ef2156646df2fe1",
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||||
"sha256:b3ef2c69c655db63deb96b3c3e587084612f9b1fa983df5e0c3379d41307467f",
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||||
"sha256:b52a65e4ea43c6d149c5f8ddb0bef8d4a1e779b77591a458a893eb416624a418",
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||||
"sha256:b665caeeda58625c3946ad7308fbd88a086ee51ccb706307e5b1fa91556ac886",
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||||
"sha256:b74fdffce9dfcf2dc296dec8743e5b0332d15df19ae464f0e249aa871fc1c571",
|
||||
"sha256:b995bfa6bf01a9e09b884077a6d37070464b529d8682d7691c2d3b540d357a0c",
|
||||
"sha256:bd82010f8ab451dabe36054a1622870166a67cf3fce894f68895db6f74bbdc94",
|
||||
"sha256:bdcd5538e27f188dd3c804b4a8d5f52a7fc7f87e7fd6b374b8e36a4ca03db428",
|
||||
"sha256:c79d7719d027b7a42817c5d96461a99b6a49979c143839fc37aa5748c322f234",
|
||||
"sha256:cdab9555053399318b953a1fe1f586e945bc8d635ce9d05e617fd9fe3a4687d6",
|
||||
"sha256:ce72dba6a20e39a0c628258b5c308779b8697f7676c254a845715e2a1039b968",
|
||||
"sha256:d337193bbf3e45171c8025e291530fb7548a93c45253897cd764a6a71c937ed9",
|
||||
"sha256:d3dcb774e3568477275cc76554b5a565024b8ba3a0322f77c246bc7111c5bb9c",
|
||||
"sha256:d64ba08db72e5dfd5c33be1e1e687d5e4fcce09219e8aee893a4862034081d4e",
|
||||
"sha256:d7a2e3b7f5703ffbd500dabdefcbc9eafeff4b9444bbdd5d83d79eedf8428fab",
|
||||
"sha256:d831ee0a50946d24a53821819b2327d5751b0c938b12c0653ea5be7dea9c82ec",
|
||||
"sha256:d9018153cf57fc302a2a34cb7564870b859ed9a732d16b41a9b5cb2ebed2d444",
|
||||
"sha256:e5171ef898299c657685306d8e1478a45e9303ddcd8ac5fed5bd52ad4ae0b69b",
|
||||
"sha256:e94e98c7cb94cfa6e071d401ea3342767f28eb5a06a58fafdc0d2a4974f4f35c",
|
||||
"sha256:ec39698c45b11d9694a1b635a70946a5bad066b593af863460a8e600f0dff1ca",
|
||||
"sha256:ed9aba6e01ff6f2e8285e5aa4154e2970068fe0fc0998c4380d0e6278222269b",
|
||||
"sha256:edf71b01dec9f766fb285b73930f95f730bb0943500ba0566ae234b5c1618c18",
|
||||
"sha256:ee82c98bed9d97cd2f53bdb035e619309a098ea53ce525833e26b93f673bc318",
|
||||
"sha256:f4c96283fca3ee09fb044f02156d9570d156698bc3734252175a38f0e8975f07",
|
||||
"sha256:f7d9b87c4c55e3ea8881dfcbf6d61ea6775fffed1fedffaa60bd047d3c08c430",
|
||||
"sha256:f83df90191d67af5a831da3a33dd7628b02a95450e168785586ed51e6d28943c",
|
||||
"sha256:fca9433a45f18b7c779d2bae7beeec4f740d28b788b117a48368d95a3233ed83",
|
||||
"sha256:fd92bbaa2ecdb7864b7600dcdb6f2f1db6e0346ed425fbd01085be04c63f0b05"
|
||||
"sha256:0125f91f70e0732a9f8ee01e49515c35d38ba48db507a50c5bdcad9503af5827",
|
||||
"sha256:0a04059f4923ce4e856b4b4e5e783a70f49d9663d22a4c3b3298165996d1377f",
|
||||
"sha256:0b289572c33a0deae62daa57e44a25b99b783e5f7aed81b314232b3d3c81a11d",
|
||||
"sha256:10f6ae86d5cb647bf58f9f655fcf577f713915a5d69057a0371bc257e2553234",
|
||||
"sha256:13bb21f8ba3248386337c9fa51c528868e6c34a707f729ab041c846d52a0c69a",
|
||||
"sha256:15ac96dd567ad6c71c71f7b2c658cb22b7734901546cd50a475128ab557593ca",
|
||||
"sha256:18b3bd29954bc4abeeb4e9d9cf0b30227f0f206c86657674f544cb032296acd5",
|
||||
"sha256:1909e0a9cd95251b15bff4261de5dd7550885bd172e3536824bf1cf6b121e200",
|
||||
"sha256:1a2902ede862969077b97523987c38db28abbe09fb19866e711485d9fbf0d417",
|
||||
"sha256:1a7bac2bde1d661fb31f4d4e8e539e178774b76db3c2c17c4bb3e960a5de07a2",
|
||||
"sha256:237f9be419e977a0f8f6b2e7b0475ababe78ff1ab06822df95d914a945eac827",
|
||||
"sha256:266710eb6fddc1f5e51843c70e3bebfb0f5e77cf4f27129278c70554104d19ed",
|
||||
"sha256:29c7fd632ccaf5517c16a5188e36f6612d6472ccf55382db6c7fe3fcccb7f59f",
|
||||
"sha256:2b7a21715fb12274a71d335cff6c71fe7f676b293d322722fe708a9ec81d91f5",
|
||||
"sha256:2cfb371be97d4db374cba381b9f911dd35bb5f4c58faa7b8b7106c8853e5d225",
|
||||
"sha256:2cfcb3952350e95603f232a7a15f6c5f86c5375e46f0bd4ae70d43e3e063c13d",
|
||||
"sha256:2f1fefb2e90e89959447bc0420fddd1e76f625784340d64a2f7d5983ef9ad246",
|
||||
"sha256:360a398c3a19672cf93527f7e8d8b60d8275119c5d900f2e184d32483117a705",
|
||||
"sha256:3e380c89983ce6e6fe2dd1e1921b9952fb4e6da882931abd1824c092ed495dec",
|
||||
"sha256:4a8ec1e4e16e2d5bafc9ba82f7aaecfeec990ca7cd27e84fb6f191804ed2fcfc",
|
||||
"sha256:4ab626da2fc1ac277bbf752446470b367f84b50295264d2d313e28dc4405d663",
|
||||
"sha256:4b6227351e11c57ae997d222e13f5b6f1f0700d84b8c52304e8675d33a808382",
|
||||
"sha256:554389562c29c2c182e3908b149095051f81d28c2fec79ad6c8997d7d63e0009",
|
||||
"sha256:5c40fe7dd9e5f81e0847b1ea64e1f5dd79dd61afbedb57759df06767ac719b40",
|
||||
"sha256:68b2dddba7a4e6151384e252a5632efcaa9bc5d1c4b567f3cb621306b2ca9f63",
|
||||
"sha256:7ee32c9a9bee4d0b7bd7cbeb53cb185cf0b622ac761efaa2eba84006c3b3a614",
|
||||
"sha256:830aa432ba5c491d52a15b51526c29e4a4b92bf4f92253787f9726fe01519487",
|
||||
"sha256:832ccc221927c860e7286c55c9b6ebcc0265d5e072f49c7f6456c7798d2b39aa",
|
||||
"sha256:839ebd0df4a18c5b3c1b890145b5a3f5f64063c2a0d02b13c76d78fe5de34936",
|
||||
"sha256:852de68acd6212cd6d33edf21e6f9e56e5d98c6add46f48244bd479d97c967c6",
|
||||
"sha256:85fbb6102b3296926d0c62cfc9347f6237fb9400aecd0ba6bbda94cae15f2b3b",
|
||||
"sha256:86c0df05b47a79d80351cd179893f2f9c1b1cae49d96e8b3290c7f4bd0ca0a92",
|
||||
"sha256:894342d61d355446d02cd3988a7326af344143eb33a2fd5d38482a92072d9563",
|
||||
"sha256:8c0db396e6003d99bb2d7232c957b5f0b5634bbd1b24e381a5afcc880f7373fb",
|
||||
"sha256:8e637810586e6fe380c8bc1b3910accd7f1d3a9a7262c8a78d4c8fb3ba6a2b3d",
|
||||
"sha256:9475b0093767e1475095f2aeb1d219fb9664081d403d1dff81342df8cd707034",
|
||||
"sha256:95cf944fcfc394c5f9de794ce581914900f82ff1f855326f25ebcf24d5397418",
|
||||
"sha256:974866e0db748ebf1eccab17862bc0f0303807ed9cda465d1324625b81293a18",
|
||||
"sha256:9848b21ae152fe79c10dd0197304ada8f7b586d3ebc3f27f43c506e5a52a863c",
|
||||
"sha256:9f4571a783914feda92018ef3901dab8caf5b029325b5fe4558c074582815249",
|
||||
"sha256:a056c2f692d65bf1e99c41045e3bdcaea3cb9e6b5a53dcaf60a5f3bd95fc9763",
|
||||
"sha256:a0dbcb1c2d8f2ab6e0a81c6699b236932bd264d4cef1ac475858d16c403de74d",
|
||||
"sha256:a16512051a822a416b0d477d5f8c0e67b67c1a20d9acecb0aafa3aa4d6e7d256",
|
||||
"sha256:a2014a2b18ad3ca53b1f6c23f8cd94a18ce930c1837bd891262c182640eb40a6",
|
||||
"sha256:a3904d88955fda461ea2531fcf6ef73584ca921415d5cfa44457a225f4a42bc1",
|
||||
"sha256:a74add8d7727e6404d5dc4dcd7fac65d4d82f95928bbee0cf5414c900e86773e",
|
||||
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|
||||
"sha256:d591f8de75824cbb7acad4e05d2d710484f15f29d4a915092675ad3456f11770",
|
||||
"sha256:d5f6b181bb38171a8ad1d6aa58a67a6aa9d4b38d0f8c5f496b9e42561dfc62fe",
|
||||
"sha256:d63efaa0cd96cf0c5fe4d581521d9fa87744540d4bc999ae6e08595a1014b45b",
|
||||
"sha256:d99e5546bf73dbad5bf3547174cd6cb8ba7273062a23808ffea025ecb1cf8562",
|
||||
"sha256:e09473f095a819042ecb2ab9465aee615bd9c2028e4ef7d933600a8401c79561",
|
||||
"sha256:e8b56bdcdb4505c8078cb6c7157d9811a85790f2f2b3632c7d1462ab5783d215",
|
||||
"sha256:ee443ef070bb3b6ed74514f5efaa37a252af57c90eb33b956d35c8e9c10a1931",
|
||||
"sha256:f29d80eb9a9263b8d109135351caf568cc3f80b9928bccde535c235de55c22d9",
|
||||
"sha256:f7a866fbc1e97b5c617ee4116daaa09b722101d4a3c170c787450ba409f9736f",
|
||||
"sha256:fcd5cf9e305d7b8338754470cf69cf81f420459dbae8a3b40cee57417f4614a7"
|
||||
],
|
||||
"markers": "python_version >= '3.9'",
|
||||
"version": "==14.1"
|
||||
"version": "==15.0.1"
|
||||
},
|
||||
"zipp": {
|
||||
"hashes": [
|
||||
"sha256:2c9958f6430a2040341a52eb608ed6dd93ef4392e02ffe219417c1b28b5dd1f4",
|
||||
"sha256:ac1bbe05fd2991f160ebce24ffbac5f6d11d83dc90891255885223d42b3cd931"
|
||||
"sha256:071652d6115ed432f5ce1d34c336c0adfd6a884660d1e9712a256d3d3bd4b14e",
|
||||
"sha256:a07157588a12518c9d4034df3fbbee09c814741a33ff63c05fa29d26a2404166"
|
||||
],
|
||||
"markers": "python_version >= '3.9'",
|
||||
"version": "==3.21.0"
|
||||
"version": "==3.23.0"
|
||||
}
|
||||
},
|
||||
"develop": {}
|
||||
|
||||
@@ -61,6 +61,7 @@ extensions = [
|
||||
"warnings_filter",
|
||||
"sphinx_tags",
|
||||
"sphinx_design",
|
||||
"sphinx_collapse",
|
||||
]
|
||||
|
||||
source_suffix = [".rst", ".md"]
|
||||
|
||||
@@ -2,537 +2,516 @@
|
||||
ELF Programs – No Symbol Tables
|
||||
===============================
|
||||
|
||||
.. warning::
|
||||
Migrated from:
|
||||
https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=139629542
|
||||
You can easily extend the firmware in your released, embedded system using
|
||||
ELF programs provided via a file system. For example, an SD card or, perhaps,
|
||||
downloaded into on-board SPI FLASH.
|
||||
|
||||
You can easily extend the firmware in your released, embedded system using ELF
|
||||
programs provided via a file system (for example, an SD card or downloaded into
|
||||
on-board SPI FLASH). In order to support such post-release updates, your
|
||||
released firmware would have to support execution of fully linked, relocatable
|
||||
ELF programs loaded into RAM (see, for example, ``apps/examples/elf``).
|
||||
In order to support such post-release updates, your released firmware must
|
||||
support execution of ELF programs loaded into RAM and symbol tables also
|
||||
provided via the file system (see `apps/examples/elf`).
|
||||
|
||||
The files shown in this Wiki page can be downloaded `here <https://cwiki.apache.org/confluence/download/attachments/139629402/elfprog-nosymtab.tar.gz?version=1&modificationDate=1576735520000&api=v2>`_.
|
||||
|
||||
Alan Carvalho de Assis has also made a video based on this example in the
|
||||
YouTube `NuttX Channel <https://www.youtube.com/watch?v=oL6KAgkTb8M>`_.
|
||||
Alan Carvalho de Assis has also made a video based on this example and
|
||||
published it in the `NuttX YouTube channel <https://www.youtube.com/watch?v=oL6KAgkTb8M>`_.
|
||||
|
||||
Creating the Export Package
|
||||
===========================
|
||||
|
||||
At the time that you release the firmware, you should create and save an
|
||||
export package. The export package is all that you need to create
|
||||
post-release, add-on modules for your embedded system. Let's illustrate this
|
||||
using the ``STM32F4-Discovery`` networking ``NSH`` configuration with the
|
||||
``STM32F4DIS-BB`` baseboard. (This demonstration assumes that you also have
|
||||
support for some externally modifiable media in the board configuration, such
|
||||
as removable media like an SD card, or a USB FLASH stick, an internal file
|
||||
system remotely accessible via USB MSC, FTP, or any remote file system (NFS).
|
||||
The networking ``NSH`` configuration uses the SD card on the STM32 baseboard
|
||||
for this demonstration. Other ``NSH`` configurations could be used, provided
|
||||
that you supply the necessary file system support in some fashion.)
|
||||
At the time of firmware release, you should create and save an export package.
|
||||
This export package contains all the necessary files required to create
|
||||
post-release add-on modules for your embedded system.
|
||||
|
||||
(No baseboard? You can add file system support to the basic ``STM32F4-Discovery``
|
||||
board by following these instructions:
|
||||
`USB FLASH drive <https://www.youtube.com/watch?v=5hB5ZXpRoS4>`_
|
||||
or `SD card <https://www.youtube.com/watch?v=H28t4RbOXqI>`_.)
|
||||
For demonstration purposes, we'll use the STM32F4-Discovery with the network
|
||||
NSH configuration. This setup assumes that you have the STM32F4DIS-BB
|
||||
baseboard. The demonstration also requires support for externally modifiable
|
||||
media, such as:
|
||||
|
||||
.. code-block:: shell
|
||||
- Removable media, like an SD card or USB flash drive.
|
||||
- An internal file system remotely accessible via USB MSC, FTP, or other
|
||||
protocols.
|
||||
- A remote file system, such as NFS.
|
||||
|
||||
In this demonstration, the networking NSH configuration uses the SD card on
|
||||
the STM32 baseboard. Other NSH configurations can also be used, provided they
|
||||
supply the necessary file system support.
|
||||
|
||||
.. tip::
|
||||
No baseboard? You can add file system support to the basic STM32F4-Discovery
|
||||
board by following these instructions: `USB FLASH drive <https://www.youtube.com/watch?v=5hB5ZXpRoS4>`__
|
||||
or `SD card <https://www.youtube.com/watch?v=H28t4RbOXqI>`__.
|
||||
|
||||
Initialize the environment:
|
||||
|
||||
.. code-block:: console
|
||||
|
||||
$ make distclean
|
||||
$ tools/configure.sh -c stm32f4discovery:netnsh
|
||||
$ make menuconfig
|
||||
|
||||
Your released firmware would have to have been built with a few important
|
||||
configuration settings:
|
||||
Edit the configuration:
|
||||
|
||||
1. Disable networking (Only because it is not needed in this example):
|
||||
|
||||
.. code-block:: shell
|
||||
|
||||
# CONFIG_NET is not set
|
||||
|
||||
2. Enable basic ELF binary support with no built-in symbol table support:
|
||||
|
||||
.. code-block:: shell
|
||||
|
||||
CONFIG_ELF=y
|
||||
CONFIG_LIBC_EXECFUNCS=y
|
||||
# CONFIG_EXECFUNCS_HAVE_SYMTAB is not set
|
||||
|
||||
3. Enable PATH variable support:
|
||||
|
||||
.. code-block:: shell
|
||||
|
||||
CONFIG_BINFMT_EXEPATH=y
|
||||
CONFIG_PATH_INITIAL="/bin"
|
||||
# CONFIG_DISABLE_ENVIRON not set
|
||||
|
||||
4. Enable execution of ELF files from the ``NSH`` command line:
|
||||
|
||||
.. code-block:: shell
|
||||
|
||||
CONFIG_NSH_FILE_APPS=y
|
||||
- Disable networking (it is not needed in this example):
|
||||
``# CONFIG_NET is not set``.
|
||||
- Enable ELF binary support without external symbol tables:
|
||||
``CONFIG_ELF=y``,
|
||||
``CONFIG_LIBC_EXECFUNCS=y``,
|
||||
``# CONFIG_EXECFUNCS_HAVE_SYMTAB is not set``.
|
||||
- Enable PATH variable support:
|
||||
``CONFIG_LIBC_ENVPATH=y``,
|
||||
``CONFIG_PATH_INITIAL="/addons"``,
|
||||
``# CONFIG_DISABLE_ENVIRON not set``.
|
||||
- Enable execution of ELF files from NSH: ``CONFIG_NSH_FILE_APPS=y``.
|
||||
|
||||
.. note::
|
||||
|
||||
You must enable some application that uses ``printf()``. This is necessary
|
||||
to assure that the symbol ``printf()`` is included in the base system.
|
||||
Here we assume that you include the "Hello, World!" example from
|
||||
``apps/examples/hello``:
|
||||
You must enable some application that uses ``printf()``. This is necessary
|
||||
to ensure that the symbol ``printf()`` is included in the base system.
|
||||
Here we assume that the "Hello, World!" example from ``apps/examples/hello``
|
||||
has been enabled with the configuration option ``CONFIG_EXAMPLES_HELLO=y``.
|
||||
|
||||
.. code-block:: shell
|
||||
Then, build the NuttX firmware image and the export package:
|
||||
|
||||
CONFIG_EXAMPLES_HELLO=y
|
||||
|
||||
Then we can build the NuttX firmware image and the export package:
|
||||
|
||||
.. code-block:: shell
|
||||
.. code-block:: console
|
||||
|
||||
$ make
|
||||
$ make export
|
||||
|
||||
When ``make export`` completes, you will find a ZIP'ed package in the top-level
|
||||
NuttX directory called ``nuttx-export-x.y.zip`` (for version ``x.y``). The
|
||||
version is determined by the ``.version`` file in the same directory. The
|
||||
content of this ZIP file is the following directory structure:
|
||||
When ``make export`` completes, you will find a ZIP package in the top-level
|
||||
NuttX directory called ``nuttx-export-x.y.zip`` (where ``x.y`` corresponds to
|
||||
the version determined by the ``.version`` file in the same directory).
|
||||
The contents of this ZIP file are organized as follows:
|
||||
|
||||
.. code-block:: shell
|
||||
.. code-block:: text
|
||||
|
||||
nuttx-export-x.x
|
||||
|- arch/
|
||||
|- build/
|
||||
|- include/
|
||||
|- libs/
|
||||
|- startup/
|
||||
|- System.map
|
||||
`- .config
|
||||
|- arch/
|
||||
|- include/
|
||||
|- libs/
|
||||
|- registry/
|
||||
|- scripts/
|
||||
|- startup/
|
||||
|- tools/
|
||||
|- System.map
|
||||
`- .config
|
||||
|
||||
The Add-On Build Directory
|
||||
==========================
|
||||
Preparing the Add-On Build Directory
|
||||
====================================
|
||||
|
||||
In order to create the add-on ELF program, you will need (1) the export
|
||||
package, (2) the program build ``Makefile``, (3) a linker script used by the
|
||||
``Makefile``, and (4) a Bash script to create a linker script. That
|
||||
``Makefile`` and Bash Script are discussed in the following paragraphs.
|
||||
In order to create the add-on ELF program, you will need:
|
||||
|
||||
1. The export package.
|
||||
2. A Makefile to build the program.
|
||||
3. A first linker script to use in the Makefile (``gnu-elf.ld``).
|
||||
4. A Bash script to create a second linker script (``defines.ld``).
|
||||
|
||||
.. note::
|
||||
|
||||
These example files implicitly assume a GNU tool chain is used and, in at
|
||||
least one place, that the target is an ARMv7-M platform. A non-GNU tool
|
||||
chain would probably require a significantly different ``Makefile`` and
|
||||
linker script. There is at least one ARMv7-M specific change that would
|
||||
have to be made for other platforms in the script that creates the linker
|
||||
script (``mkdefines.sh``).
|
||||
These example files implicitly assume a GNU tool chain is used and, in at
|
||||
least one place, that the target is an ARMv7-M platform. A non-GNU tool
|
||||
chain would probably require a significantly different Makefile and
|
||||
linker script. There is at least one ARMv7-M specific change that would
|
||||
have to be made for other platforms in the script that creates the linker
|
||||
script (later on referred to as ``mkdefines.sh``).
|
||||
|
||||
Hello Example
|
||||
=============
|
||||
|
||||
To keep things manageable, let's use a concrete example. Suppose the ELF
|
||||
program that we wish to add to the release code is the single source file
|
||||
``hello.c``:
|
||||
To keep things manageable, let's use a concrete example. Suppose the ELF
|
||||
program that we wish to add to the release code is the simple
|
||||
source file ``hello.c``:
|
||||
|
||||
.. code-block:: c
|
||||
|
||||
#include <stdio.h>
|
||||
|
||||
|
||||
int main(int argc, char **argv)
|
||||
{
|
||||
printf("Hello from Add-On Program!\n");
|
||||
printf("Hello from a fully linked Add-On Program!\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
Let's say that we have a directory called ``addon`` and it contains the
|
||||
``hello.c`` source file, a ``Makefile`` that will create the ELF program, and a
|
||||
Bash script called ``mkdefines.sh`` that will create a linker script.
|
||||
Let's say that we have a directory called ``addon`` that contains
|
||||
the following:
|
||||
|
||||
1. The ``hello.c`` source file.
|
||||
2. A Makefile to build the ELF program.
|
||||
3. The export package ``nuttx-export-x.y.zip``.
|
||||
4. A Bash script called ``mkdefines.sh`` that will create the second
|
||||
(``defines.ld``) linker script.
|
||||
|
||||
Building the ELF Program
|
||||
========================
|
||||
|
||||
The first step in creating the ELF program is to unzip the Export Package. We
|
||||
start with our ``addon`` directory containing the following:
|
||||
The first step in creating the ELF program is to unzip the export
|
||||
package. Starting in the ``addon`` directory:
|
||||
|
||||
.. code-block:: shell
|
||||
.. code-block:: console
|
||||
|
||||
$ cd addon
|
||||
$ ls
|
||||
gnu-elf.ld hello.c Makefile mkdefines.sh nuttx-export-7.25.zip
|
||||
hello.c Makefile mkdefines.sh nuttx-export-x.y.zip
|
||||
|
||||
Where:
|
||||
- ``hello.c`` is the example source file.
|
||||
- ``Makefile`` builds the ELF program.
|
||||
- ``mkdefines.h`` is the Bash script that will create the linker script that will serve as the symbol table.
|
||||
- ``nuttx-export-x.y.zip`` is the export package from NuttX version ``x.y``.
|
||||
|
||||
- ``gnu-elf.ld`` is the linker script.
|
||||
- ``hello.c`` is our example source file.
|
||||
- ``Makefile`` will build our ELF program and symbol table.
|
||||
- ``mksymtab.h`` is the Bash script that will create the symbol table for the
|
||||
ELF program.
|
||||
- ``nuttx-export-7.25.zip`` is the Export Package for NuttX-7.25.
|
||||
Unzip the export package and rename the folder for ease of use:
|
||||
|
||||
We unzip the Export Package like:
|
||||
.. code-block:: console
|
||||
|
||||
.. code-block:: shell
|
||||
$ unzip nuttx-export-x.y.zip
|
||||
$ mv nuttx-export-x.y nuttx-export
|
||||
|
||||
$ unzip nuttx-export-7.25.zip
|
||||
|
||||
Then we have a new directory called ``nuttx-export-7.25`` that contains all of
|
||||
the content from the released NuttX code that we need to build the ELF
|
||||
program.
|
||||
This creates a new directory called ``nuttx-export``, containing
|
||||
all the content from the released NuttX code required to build
|
||||
the ELF program.
|
||||
|
||||
The Makefile
|
||||
============
|
||||
|
||||
The ELF program is created simply as:
|
||||
|
||||
.. code-block:: shell
|
||||
.. code-block:: console
|
||||
|
||||
$ make
|
||||
|
||||
This uses the following ``Makefile`` to generate several files:
|
||||
This uses the following Makefile to generate several files:
|
||||
|
||||
- ``hello.o``: The compiled ``hello.c`` object.
|
||||
- ``hello.r``: A "partially linked" ELF object that still has undefined
|
||||
symbols.
|
||||
- ``hello``: The fully linked, relocatable ELF program.
|
||||
- ``linker.ld``: A linker script created by ``mkdefines.sh``.
|
||||
- ``hello.o``: The compiled ``hello.c`` object.
|
||||
- ``hello.r``: A partially linked ELF object that still has undefined symbols.
|
||||
- ``hello``: The fully linked, relocatable ELF program.
|
||||
- ``linker.ld``: The linker script created by ``mkdefines.sh``.
|
||||
|
||||
Only the resulting ``hello`` is needed.
|
||||
The Makefile used to create the ELF program is as follows:
|
||||
|
||||
Below is the ``Makefile`` used to create the ELF program:
|
||||
.. note::
|
||||
|
||||
.. code-block:: shell
|
||||
When copying the following contents, remember that Makefile indentations
|
||||
must be made with proper tab characters and not just spaces.
|
||||
|
||||
.. code-block:: makefile
|
||||
|
||||
include nuttx-export/scripts/Make.defs
|
||||
|
||||
# Long calls are needed to call from RAM into FLASH
|
||||
|
||||
include nuttx-export-7.25/build/Make.defs
|
||||
|
||||
# Long calls are need to call from RAM into FLASH
|
||||
|
||||
ARCHCFLAGS += -mlong-calls
|
||||
|
||||
# You may want to check these options against the ones in "nuttx-export/scripts/Make.defs"
|
||||
|
||||
ARCHWARNINGS = -Wall -Wstrict-prototypes -Wshadow -Wundef
|
||||
ARCHOPTIMIZATION = -Os -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
|
||||
ARCHINCLUDES = -I. -isystem nuttx-export-7.25/include
|
||||
|
||||
CFLAGS = $(ARCHCPUFLAGS) $(ARCHCFLAGS) $(ARCHWARNINGS) $(ARCHOPTIMIZATION) $(ARCHINCLUDES) -pipe
|
||||
|
||||
CROSSDEV = arm-none-eabi-
|
||||
CC = $(CROSSDEV)gcc
|
||||
LD = $(CROSSDEV)ld
|
||||
STRIP = $(CROSSDEV)strip --strip-unneeded
|
||||
|
||||
ARCHINCLUDES = -I. -isystem nuttx-export/include
|
||||
|
||||
CFLAGS = $(ARCHCFLAGS) $(ARCHWARNINGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES)
|
||||
|
||||
# Setup up linker command line options
|
||||
|
||||
LDRELFLAGS = -r
|
||||
|
||||
LDELFFLAGS = -r -e main
|
||||
LDELFFLAGS += -T defines.ld -T gnu-elf.ld
|
||||
|
||||
# This might change in a different environment
|
||||
|
||||
OBJEXT ?= .o
|
||||
|
||||
|
||||
LDRELFLAGS = --relocatable
|
||||
|
||||
LDELFFLAGS = --relocatable -e main
|
||||
LDELFFLAGS += -T defines.ld -T nuttx-export/scripts/gnu-elf.ld
|
||||
|
||||
# This is the generated ELF program
|
||||
|
||||
|
||||
BIN = hello
|
||||
REL = hello.r
|
||||
|
||||
# These are the sources files that we use
|
||||
|
||||
|
||||
# These are the source files that we use
|
||||
|
||||
SRCS = hello.c
|
||||
OBJS = $(SRCS:.c=$(OBJEXT))
|
||||
|
||||
|
||||
# Build targets
|
||||
|
||||
all: $(BIN)
|
||||
|
||||
.PHONY: clean
|
||||
|
||||
|
||||
all: $(BIN)
|
||||
|
||||
$(OBJS): %$(OBJEXT): %.c
|
||||
$(CC) -c $(CFLAGS) -o $@ $<
|
||||
|
||||
System.map: nuttx-export-7.25/System.map
|
||||
cat nuttx-export-7.25/System.map | sed -e "s/\r//g" >System.map
|
||||
|
||||
$(CC) -c $(CFLAGS) -o $@ $<
|
||||
|
||||
System.map: nuttx-export/System.map
|
||||
cat nuttx-export/System.map | sed -e "s/\r//g" > System.map
|
||||
|
||||
$(REL): $(OBJS)
|
||||
$(LD) $(LDRELFLAGS) -o $@ $<
|
||||
|
||||
$(LD) $(LDRELFLAGS) -o $@ $<
|
||||
|
||||
defines.ld: System.map $(REL)
|
||||
./mkdefines.sh System.map "$(REL)" >defines.ld
|
||||
|
||||
./mkdefines.sh System.map "$(REL)" > defines.ld
|
||||
|
||||
$(BIN): defines.ld $(REL)
|
||||
$(LD) $(LDELFFLAGS) -o $@ $(REL)
|
||||
$(STRIP) $(REL)
|
||||
|
||||
$(LD) $(LDELFFLAGS) -o $@ $(REL)
|
||||
$(STRIP) $@
|
||||
#$(CROSSDEV)objdump -f $@
|
||||
|
||||
clean:
|
||||
rm -f $(BIN)
|
||||
rm -f $(REL)
|
||||
rm -f defines.ld
|
||||
rm -f System.map
|
||||
rm -f *.o
|
||||
rm -f $(BIN)
|
||||
rm -f $(REL)
|
||||
rm -f $(OBJS)
|
||||
rm -f defines.ld
|
||||
rm -f System.map
|
||||
|
||||
The Linker Script
|
||||
=================
|
||||
|
||||
Two linker scripts are used. One is a normal file (we'll call it the main
|
||||
linker script), and the other, ``defines.ld``, is created on-the-fly as
|
||||
described in the next section.
|
||||
Two linker scripts are used: the main one, ``gnu-elf.ld``, is a normal file,
|
||||
while ``defines.ld`` is created on-the-fly as described in the next section.
|
||||
|
||||
The main linker script, ``gnu-elf.ld``, contains the following:
|
||||
The main linker script used in this example is the one from the exported
|
||||
NuttX package: ``nuttx-export/scripts/gnu-elf.ld``.
|
||||
|
||||
.. code-block:: shell
|
||||
.. admonition:: Here is an alternative minimal (and possibly outdated) version
|
||||
|
||||
SECTIONS
|
||||
{
|
||||
.text 0x00000000 :
|
||||
{
|
||||
_stext = . ;
|
||||
*(.text)
|
||||
*(.text.*)
|
||||
*(.gnu.warning)
|
||||
*(.stub)
|
||||
*(.glue_7)
|
||||
*(.glue_7t)
|
||||
*(.jcr)
|
||||
_etext = . ;
|
||||
}
|
||||
|
||||
.rodata :
|
||||
{
|
||||
_srodata = . ;
|
||||
*(.rodata)
|
||||
*(.rodata1)
|
||||
*(.rodata.*)
|
||||
*(.gnu.linkonce.r*)
|
||||
_erodata = . ;
|
||||
}
|
||||
|
||||
.data :
|
||||
{
|
||||
_sdata = . ;
|
||||
*(.data)
|
||||
*(.data1)
|
||||
*(.data.*)
|
||||
*(.gnu.linkonce.d*)
|
||||
_edata = . ;
|
||||
}
|
||||
|
||||
.bss :
|
||||
{
|
||||
_sbss = . ;
|
||||
*(.bss)
|
||||
*(.bss.*)
|
||||
*(.sbss)
|
||||
*(.sbss.*)
|
||||
*(.gnu.linkonce.b*)
|
||||
*(COMMON)
|
||||
_ebss = . ;
|
||||
}
|
||||
|
||||
/* Stabs debugging sections. */
|
||||
|
||||
.stab 0 : { *(.stab) }
|
||||
.stabstr 0 : { *(.stabstr) }
|
||||
.stab.excl 0 : { *(.stab.excl) }
|
||||
.stab.exclstr 0 : { *(.stab.exclstr) }
|
||||
.stab.index 0 : { *(.stab.index) }
|
||||
.stab.indexstr 0 : { *(.stab.indexstr) }
|
||||
.comment 0 : { *(.comment) }
|
||||
.debug_abbrev 0 : { *(.debug_abbrev) }
|
||||
.debug_info 0 : { *(.debug_info) }
|
||||
.debug_line 0 : { *(.debug_line) }
|
||||
.debug_pubnames 0 : { *(.debug_pubnames) }
|
||||
.debug_aranges 0 : { *(.debug_aranges) }
|
||||
}
|
||||
.. collapse:: Show content:
|
||||
|
||||
.. code-block:: text
|
||||
|
||||
SECTIONS
|
||||
{
|
||||
.text 0x00000000 :
|
||||
{
|
||||
_stext = . ;
|
||||
*(.text)
|
||||
*(.text.*)
|
||||
*(.gnu.warning)
|
||||
*(.stub)
|
||||
*(.glue_7)
|
||||
*(.glue_7t)
|
||||
*(.jcr)
|
||||
_etext = . ;
|
||||
}
|
||||
|
||||
.rodata :
|
||||
{
|
||||
_srodata = . ;
|
||||
*(.rodata)
|
||||
*(.rodata1)
|
||||
*(.rodata.*)
|
||||
*(.gnu.linkonce.r*)
|
||||
_erodata = . ;
|
||||
}
|
||||
|
||||
.data :
|
||||
{
|
||||
_sdata = . ;
|
||||
*(.data)
|
||||
*(.data1)
|
||||
*(.data.*)
|
||||
*(.gnu.linkonce.d*)
|
||||
_edata = . ;
|
||||
}
|
||||
|
||||
.bss :
|
||||
{
|
||||
_sbss = . ;
|
||||
*(.bss)
|
||||
*(.bss.*)
|
||||
*(.sbss)
|
||||
*(.sbss.*)
|
||||
*(.gnu.linkonce.b*)
|
||||
*(COMMON)
|
||||
_ebss = . ;
|
||||
}
|
||||
|
||||
/* Stabs debugging sections. */
|
||||
|
||||
.stab 0 : { *(.stab) }
|
||||
.stabstr 0 : { *(.stabstr) }
|
||||
.stab.excl 0 : { *(.stab.excl) }
|
||||
.stab.exclstr 0 : { *(.stab.exclstr) }
|
||||
.stab.index 0 : { *(.stab.index) }
|
||||
.stab.indexstr 0 : { *(.stab.indexstr) }
|
||||
.comment 0 : { *(.comment) }
|
||||
.debug_abbrev 0 : { *(.debug_abbrev) }
|
||||
.debug_info 0 : { *(.debug_info) }
|
||||
.debug_line 0 : { *(.debug_line) }
|
||||
.debug_pubnames 0 : { *(.debug_pubnames) }
|
||||
.debug_aranges 0 : { *(.debug_aranges) }
|
||||
}
|
||||
|
||||
Creating the ``defines.ld`` Linker Script
|
||||
=========================================
|
||||
|
||||
The additional linker script ``defines.ld`` is created through a three-step
|
||||
The additional linker script, ``defines.ld``, is created through a three-step
|
||||
process:
|
||||
|
||||
1. The ``Makefile`` generates a partially linked ELF object, ``hello.r``.
|
||||
2. The ``Makefile`` then invokes the ``mkdefines.sh`` script, which generates
|
||||
the ``defines.ld`` linker script that provides values for all of the
|
||||
undefined symbols.
|
||||
3. Finally, the ``Makefile`` produces the fully linked, relocatable ``hello``
|
||||
ELF object using the ``defines.ld`` linker script.
|
||||
1. The Makefile generates a partially linked ELF object, ``hello.r``.
|
||||
2. The Makefile then invokes the ``mkdefines.sh`` script, which generates
|
||||
the ``defines.ld`` linker script that provides values for all of the
|
||||
undefined symbols.
|
||||
3. Finally, the Makefile produces the fully linked, relocatable ``hello``
|
||||
ELF binary using the ``defines.ld`` linker script.
|
||||
|
||||
Below is the version of ``mkdefines.sh`` used in this demo:
|
||||
Here are the contents of the ``mkdefines.sh`` script used in this example:
|
||||
|
||||
.. code-block:: bash
|
||||
|
||||
#!/bin/bash
|
||||
|
||||
|
||||
usage="Usage: $0 <system-map> <relprog>"
|
||||
|
||||
|
||||
# Check for the required path to the System.map file
|
||||
|
||||
|
||||
sysmap=$1
|
||||
if [ -z "$sysmap" ]; then
|
||||
echo "ERROR: Missing <system-map>"
|
||||
echo ""
|
||||
echo $usage
|
||||
echo "$usage"
|
||||
exit 1
|
||||
fi
|
||||
|
||||
|
||||
# Check for the required partially linked file
|
||||
|
||||
|
||||
relprog=$2
|
||||
if [ -z "$relprog" ]; then
|
||||
echo "ERROR: Missing <program-list>"
|
||||
echo ""
|
||||
echo $usage
|
||||
echo "$usage"
|
||||
exit 1
|
||||
fi
|
||||
|
||||
|
||||
# Verify the System.map and the partially linked file
|
||||
|
||||
|
||||
if [ ! -r "$sysmap" ]; then
|
||||
echo "ERROR: $sysmap does not exist"
|
||||
echo ""
|
||||
echo $usage
|
||||
echo "$usage"
|
||||
exit 1
|
||||
fi
|
||||
|
||||
|
||||
if [ ! -r "$relprog" ]; then
|
||||
echo "ERROR: $relprog does not exist"
|
||||
echo ""
|
||||
echo $usage
|
||||
echo "$usage"
|
||||
exit 1
|
||||
fi
|
||||
|
||||
|
||||
# Extract all of the undefined symbols from the partially linked file and create a
|
||||
# list of sorted, unique undefined variable names.
|
||||
|
||||
varlist=`nm $relprog | fgrep ' U ' | sed -e "s/^[ ]*//g" | cut -d' ' -f2 | sort - | uniq`
|
||||
|
||||
|
||||
varlist=$(nm "$relprog" | grep -F ' U ' | sed -e "s/^[ ]*//g" | cut -d' ' -f2 | sort - | uniq)
|
||||
|
||||
# Now output the linker script that provides a value for all of the undefined symbols
|
||||
|
||||
|
||||
for var in $varlist; do
|
||||
map=`grep " ${var}$" ${sysmap}`
|
||||
map=$(grep " ${var}$" "${sysmap}")
|
||||
if [ -z "$map" ]; then
|
||||
echo "ERROR: Variable $var not found in $sysmap"
|
||||
echo ""
|
||||
echo $usage
|
||||
echo "$usage"
|
||||
exit 1
|
||||
fi
|
||||
|
||||
varaddr=`echo ${map} | cut -d' ' -f1`
|
||||
|
||||
varaddr=$(echo "${map}" | cut -d' ' -f1)
|
||||
echo "${var} = 0x${varaddr} | 0x00000001;"
|
||||
done
|
||||
|
||||
This script uses the ``nm`` utility to find all of the undefined symbols in the
|
||||
ELF object, then searches for the address of each undefined symbol in the
|
||||
``System.map`` that was created when the released firmware was built. Finally,
|
||||
it uses the symbol name and the symbol address to create each symbol table
|
||||
entry.
|
||||
This script uses the ``nm`` utility to find all the undefined symbols in the
|
||||
ELF binary, then searches for the address of each undefined symbol in the
|
||||
``System.map`` file that was created when the firmware was built. Finally,
|
||||
it uses the symbols' names and addresses to create each symbol table entry.
|
||||
|
||||
.. note::
|
||||
|
||||
- For the ARMv7-M architecture, bit 0 of the address must be set to indicate
|
||||
thumb mode. If you are using a different architecture that requires
|
||||
normal aligned addresses, you will need to change the following line by
|
||||
eliminating the ORed value:
|
||||
For the ARMv7-M architecture, bit 0 of the address must be set to indicate
|
||||
thumb mode. If you are using a different architecture that requires
|
||||
normal aligned addresses, you will need to change the following line by
|
||||
eliminating the ORed value:
|
||||
|
||||
.. code-block:: shell
|
||||
|
||||
echo "${var} = 0x${varaddr} | 0x00000001;"
|
||||
echo "${var} = 0x${varaddr} | 0x00000001;"
|
||||
|
||||
- If the new ELF module uses a symbol that is not provided in the base
|
||||
firmware and, hence, not included in the ``System.map`` file, this script
|
||||
will fail. In that case, you will need to provide the missing logic
|
||||
within the ELF program itself, if possible.
|
||||
.. note::
|
||||
|
||||
- The technique as described here is only valid in the FLAT build mode. It
|
||||
could probably also be extended to work in the PROTECTED mode by
|
||||
substituting ``User.map`` for ``System.map``.
|
||||
If the new ELF binary uses a symbol that is not provided in the base
|
||||
firmware (and hence not included in the ``System.map`` file) this script
|
||||
will fail. In that case, you will need to provide the missing logic
|
||||
within the ELF program itself, if possible.
|
||||
|
||||
Here is an example ``defines.ld`` created by ``mkdefines.sh``:
|
||||
.. important::
|
||||
|
||||
The technique described here is only valid in the FLAT build mode. It
|
||||
could probably also be extended to work in the PROTECTED mode by
|
||||
substituting ``User.map`` for ``System.map``.
|
||||
|
||||
Here is a short example of a ``defines.ld`` script created by ``mkdefines.sh``:
|
||||
|
||||
.. code-block:: shell
|
||||
|
||||
printf = 0x0800aefc | 0x00000001 ;
|
||||
printf = 0x0800aefc | 0x00000001;
|
||||
|
||||
Replacing an NSH Built-In Function
|
||||
==================================
|
||||
Replacing NSH Built-In Functions
|
||||
================================
|
||||
|
||||
Files can be executed by ``NSH`` from the command line by simply typing the
|
||||
name of the ELF program. This requires:
|
||||
Files can be executed by NSH from the command line by simply typing the name
|
||||
of the ELF program, given that the following requirements are met:
|
||||
|
||||
1. That the feature be enabled with``CONFIG_NSH_FILE_APP=y``
|
||||
2. That support for the PATH variable is enabled (``CONFIG_BINFMT_EXEPATH=y`` and
|
||||
``CONFIG_PATH_INITIAL`` set to the mount point of the file system that
|
||||
may contain ELF programs).
|
||||
1. The feature is enabled with ``CONFIG_NSH_FILE_APP=y``.
|
||||
2. Support for the PATH variable is enabled with ``CONFIG_LIBC_ENVPATH=y``.
|
||||
3. The mount point of the file system that may contain ELF programs is
|
||||
set in ``CONFIG_PATH_INITIAL``.
|
||||
|
||||
Suppose, for example, I have a built-in application called ``hello``. Before
|
||||
installing the new replacement ``hello`` ELF program in the file system, this
|
||||
is the version of ``hello`` that ``NSH`` will execute:
|
||||
Suppose, for example, that a built-in application called ``hello`` already
|
||||
exist. Before the installation of the new replacement ``hello`` ELF program in
|
||||
the file system, this is the version of ``hello`` that NSH will execute:
|
||||
|
||||
.. code-block:: shell
|
||||
.. code-block:: text
|
||||
|
||||
nsh> hello
|
||||
Hello, World!
|
||||
nsh>
|
||||
|
||||
In the above configuration, ``NSH`` will first attempt to run the program called
|
||||
``hello`` from the file system. This will fail because we have not yet placed
|
||||
our custom ``hello`` ELF program in the file system. So instead, ``NSH`` will
|
||||
fall back and execute the built-in application called ``hello``.
|
||||
Now suppose that we add our custom ``hello`` binary to the file system inside
|
||||
the appropriate path (see ``CONFIG_PATH_INITIAL`` above). When NSH will attempt
|
||||
to run the program called ``hello``, it will prefer the new binary present on
|
||||
the file system over the built-in version of the same program.
|
||||
|
||||
In this way, any command known to ``NSH`` can be replaced by an ELF program
|
||||
installed in a mounted file system directory that is found via the PATH
|
||||
variable.
|
||||
|
||||
Now suppose that we do add our custom ``hello`` to the file system. When
|
||||
``NSH`` attempts to run the program called ``hello`` from the file system, it
|
||||
will run successfully. The built-in version will be ignored. It has been
|
||||
replaced with the version in the file system:
|
||||
|
||||
.. code-block:: shell
|
||||
.. code-block:: text
|
||||
|
||||
nsh> mount -t vfat /dev/mmcsd0 /bin
|
||||
nsh> hello
|
||||
Hello from Add-On Program!
|
||||
Hello from a fully linked Add-On Program!
|
||||
nsh>
|
||||
|
||||
Version Dependency
|
||||
==================
|
||||
|
||||
.. note::
|
||||
.. warning::
|
||||
|
||||
This technique generates ELF programs using fixed addresses from the
|
||||
``System.map`` file of a versioned release. The generated ELF programs can
|
||||
only be used with that specific firmware version. A crash will most likely
|
||||
result if used with a different firmware version, because the addresses
|
||||
from the ``System.map`` will not match the addresses in a different version
|
||||
of the firmware.
|
||||
This technique generates ELF programs using fixed addresses from the
|
||||
``System.map`` file of a versioned release. The generated ELF programs can
|
||||
only be used with that specific firmware version. A crash will most likely
|
||||
happen if used with a different firmware version, because the addresses
|
||||
from the ``System.map`` will not match.
|
||||
|
||||
The alternative approach using :doc:`Symbol Tables <fully_linked_elf>` is more
|
||||
or less version independent.
|
||||
The alternative approach using :doc:`Symbol Tables <partially_linked_elf>` is
|
||||
more or less version independent.
|
||||
|
||||
Tightly Coupled Memories
|
||||
========================
|
||||
|
||||
Most MCUs based on ARMv7-M family processors support some kind of Tightly
|
||||
Coupled Memory (TCM). These TCMs have somewhat different properties for
|
||||
specialized operations. Depending on the bus matrix of the processor, you may
|
||||
not be able to execute programs from TCM. For instance, the ``STM32 F4``
|
||||
supports Core Coupled Memory (CCM), but since it is tied directly to the D-bus,
|
||||
it cannot be used to execute programs! On the other hand, the ``STM32F3`` has a
|
||||
CCM that is accessible to both the D-Bus and the I-Bus, in which case it
|
||||
should be possible to execute programs from this TCM.
|
||||
Most MCUs based on ARMv7-M family processors support some kind of Tightly
|
||||
Coupled Memory (TCM). These TCMs have somewhat different properties for
|
||||
specialized operations. Depending on the bus matrix of the processor, you
|
||||
may not be able to execute programs from the TCM. For instance, the STM32F4
|
||||
supports Core Coupled Memory (CCM) but, since it is tied directly to the
|
||||
D-bus, it cannot be used to execute programs. On the other hand, the STM32F3
|
||||
has a CCM that is accessible to both the D-Bus and the I-Bus, in which case
|
||||
it should be possible to execute programs directly from this TCM.
|
||||
|
||||
.. image:: ./image/system_arch_stm32f42xx_and_f43xx.png
|
||||
|
||||
.. image:: ./image/system_arch_stm32f303xBC_and_f358xC.png
|
||||
|
||||
When ELF programs are loaded into memory, the memory is allocated from the
|
||||
heap via a standard memory allocator. By default with the ``STM32 F4``, the
|
||||
CCM is included in ``HEAP`` and will typically be allocated first. If CCM
|
||||
memory is allocated to hold the ELF program, a hard-fault will occur
|
||||
immediately when you try to execute the ELF program in memory.
|
||||
|
||||
Therefore, it is necessary on ``STM32 F4`` platforms to include the following
|
||||
configuration setting:
|
||||
|
||||
.. code-block:: shell
|
||||
|
||||
CONFIG_STM32_CCMEXCLUDE=y
|
||||
|
||||
With that setting, the CCM memory will be excluded from the heap, and so will
|
||||
never be allocated for ELF program memory.
|
||||
When ELF programs are loaded into memory, such memory is allocated from the
|
||||
heap via a standard memory allocator. With the STM32F4, the CCM is included
|
||||
in the heap by default and will typically be allocated first. If CCM memory
|
||||
is allocated to hold the loaded ELF program, then a hard-fault will occur
|
||||
immediately when you try to execute it.
|
||||
Therefore, on STM32F4 platforms it is necessary to include the
|
||||
``CONFIG_STM32_CCMEXCLUDE=y`` configuration setting. With it, the CCM
|
||||
memory will be excluded from the heap and will never be allocated for
|
||||
ELF program memory.
|
||||
|
||||
@@ -2,13 +2,6 @@
|
||||
ELF Programs – With Symbol Tables
|
||||
=================================
|
||||
|
||||
.. warning::
|
||||
Migrated from:
|
||||
https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=139629543
|
||||
|
||||
Updating a Release System with ELF Programs – With Symbol Tables
|
||||
================================================================
|
||||
|
||||
You can easily extend the firmware in your released, embedded system using
|
||||
ELF programs provided via a file system. For example, an SD card or, perhaps,
|
||||
downloaded into on-board SPI FLASH.
|
||||
@@ -17,9 +10,6 @@ In order to support such post-release updates, your released firmware must
|
||||
support execution of ELF programs loaded into RAM and symbol tables also
|
||||
provided via the file system (see `apps/examples/elf`).
|
||||
|
||||
The files shown in this Wiki page can be downloaded
|
||||
`here <https://cwiki.apache.org/confluence/download/attachments/139629402/elfprog-wsymtab.tar.gz?version=1&modificationDate=1576735523000&api=v2>`_
|
||||
|
||||
Creating a Symbol Table
|
||||
=======================
|
||||
|
||||
@@ -42,31 +32,37 @@ compatible with the example provided here:
|
||||
To enable this method, you must:
|
||||
|
||||
- Set ``CONFIG_EXECFUNCS_HAVE_SYMTAB=y`` in your configuration.
|
||||
- Provide a symbol table with the global name ``CONFIG_EXECFUNCS_SYMTAB_ARRAY`` with the variable name ``CONFIG_EXECFUNCS_NSYMBOLS_VAR`` that holds the number of symbol entries. The default symbol table name is ``g_symtab``.
|
||||
- Provide a symbol table with the global name
|
||||
``CONFIG_EXECFUNCS_SYMTAB_ARRAY`` with the variable name
|
||||
``CONFIG_EXECFUNCS_NSYMBOLS_VAR`` that holds the number of symbol entries.
|
||||
The default symbol table name is ``g_symtab``
|
||||
and its length is ``g_nsymbols``.
|
||||
|
||||
In this example, let's illustrate this using an STM32F4-Discovery
|
||||
In this example, let's illustrate this using an STM32F4-Discovery
|
||||
configuration. We will assume that you have modified the
|
||||
``boards/arm/stm32/stm32fdiscovery/src/stm32_bringup.c`` file, adding the
|
||||
following:
|
||||
|
||||
.. code-block:: c
|
||||
|
||||
#include <stdio.h>
|
||||
#include <nuttx/binfmt/symtab.h>
|
||||
#include <nuttx/compiler.h>
|
||||
#include <nuttx/symtab.h>
|
||||
|
||||
const struct symtab_s g_symtab[] = {
|
||||
{"printf", (FAR void *)printf}
|
||||
{ "printf", (FAR const void *)printf }
|
||||
};
|
||||
|
||||
int g_nsymbols = 1;
|
||||
|
||||
This is a simple symbol table containing only the symbol string "printf,"
|
||||
This is a simple symbol table containing only the symbol string "printf",
|
||||
whose value is the address of the function ``printf()``.
|
||||
|
||||
There is, of course, a lot more that could be said about generating symbol
|
||||
tables. NuttX provides specialized tools in the ``tools/`` directory and
|
||||
instructions elsewhere for generating more extensive symbol tables. However,
|
||||
this example keeps things simple to focus on the core functionality.
|
||||
This example keeps things simple in order to focus on the core functionality,
|
||||
but there is, of course, a lot more that could be said about generating symbol
|
||||
tables. NuttX provides specialized tools in the ``tools/`` directory for
|
||||
generating more extensive symbol tables: you can start by taking a look at
|
||||
``tools/mksymtab.c``. An example invocation of that tool could be:
|
||||
``./tools/mksymtab -d ./libs/libc/libc.csv <path_to_generated_symtab.c>``.
|
||||
|
||||
2. **Application Logic**
|
||||
Alternatively, the symbol table can be provided dynamically by the
|
||||
@@ -76,20 +72,23 @@ compatible with the example provided here:
|
||||
allows for application-level control.
|
||||
|
||||
To use this approach, you need to:
|
||||
- Enable the configurations ``CONFIG_LIB_BOARDCTL=y`` and ``CONFIG_BOARDCTL_APP_SYMTAB=y``.
|
||||
- Include application logic to provide the symbol table. If ``CONFIG_EXAMPLES_NSH_SYMTAB=y`` is set, NSH can handle this automatically.
|
||||
- Enable the configurations ``CONFIG_BOARDCTL=y``
|
||||
and ``CONFIG_BOARDCTL_APP_SYMTAB=y``.
|
||||
- Include application logic to provide the symbol table.
|
||||
If ``CONFIG_EXAMPLES_NSH_SYMTAB=y`` is set, NSH can handle this
|
||||
automatically.
|
||||
|
||||
Export Package
|
||||
==============
|
||||
Creating the Export Package
|
||||
===========================
|
||||
|
||||
At the time of firmware release, you should create and save an export package.
|
||||
This export package contains all the necessary files required to create
|
||||
post-release add-on modules for your embedded system.
|
||||
|
||||
For demonstration purposes, we use the STM32F4-Discovery with the network NSH
|
||||
configuration. This setup assumes that you have the STM32F4DIS-BB baseboard.
|
||||
The demonstration also requires support for externally modifiable media, such
|
||||
as:
|
||||
For demonstration purposes, we'll use the STM32F4-Discovery with the network
|
||||
NSH configuration. This setup assumes that you have the STM32F4DIS-BB
|
||||
baseboard. The demonstration also requires support for externally modifiable
|
||||
media, such as:
|
||||
|
||||
- Removable media, like an SD card or USB flash drive.
|
||||
- An internal file system remotely accessible via USB MSC, FTP, or other
|
||||
@@ -100,70 +99,78 @@ In this demonstration, the networking NSH configuration uses the SD card on
|
||||
the STM32 baseboard. Other NSH configurations can also be used, provided they
|
||||
supply the necessary file system support.
|
||||
|
||||
(No baseboard? You can add file system support to the basic ``STM32F4-Discovery``
|
||||
board by following these instructions:
|
||||
`USB FLASH drive <https://www.youtube.com/watch?v=5hB5ZXpRoS4>`_
|
||||
or `SD card <https://www.youtube.com/watch?v=H28t4RbOXqI>`_.)
|
||||
.. tip::
|
||||
No baseboard? You can add file system support to the basic STM32F4-Discovery
|
||||
board by following these instructions: `USB FLASH drive <https://www.youtube.com/watch?v=5hB5ZXpRoS4>`__
|
||||
or `SD card <https://www.youtube.com/watch?v=H28t4RbOXqI>`__.
|
||||
|
||||
Example for STM32F4-Discovery:
|
||||
Initialize the environment:
|
||||
|
||||
.. code-block:: shell
|
||||
.. code-block:: console
|
||||
|
||||
$ make distclean
|
||||
$ tools/configure.sh -c stm32f4discovery:netnsh
|
||||
$ make menuconfig
|
||||
|
||||
Required configurations:
|
||||
Edit the configuration:
|
||||
|
||||
- Disable networking: ``# CONFIG_NET is not set``
|
||||
- Enable ELF binary support: ``CONFIG_ELF=y``, ``CONFIG_LIBC_EXECFUNCS=y``,
|
||||
``CONFIG_EXECFUNCS_HAVE_SYMTAB=y``, ``CONFIG_EXECFUNCS_SYMTAB_ARRAY="g_symtab"`` and
|
||||
``CONFIG_EXECFUNCS_NSYMBOLS_VAR="g_nsymbols"``
|
||||
- Enable PATH variable support: ``CONFIG_BINFMT_EXEPATH=y``,
|
||||
``CONFIG_PATH_INITIAL="/bin"``
|
||||
- Enable execution from NSH: ``CONFIG_NSH_FILE_APPS=y``
|
||||
- Disable networking (it is not needed in this example):
|
||||
``# CONFIG_NET is not set``.
|
||||
- Enable ELF binary support with external symbol tables:
|
||||
``CONFIG_ELF=y``,
|
||||
``CONFIG_LIBC_EXECFUNCS=y``,
|
||||
``CONFIG_EXECFUNCS_HAVE_SYMTAB=y``,
|
||||
``CONFIG_EXECFUNCS_SYMTAB_ARRAY="g_symtab"``,
|
||||
``CONFIG_EXECFUNCS_NSYMBOLS_VAR="g_nsymbols"``.
|
||||
- Enable PATH variable support:
|
||||
``CONFIG_LIBC_ENVPATH=y``,
|
||||
``CONFIG_PATH_INITIAL="/addons"``,
|
||||
``# CONFIG_DISABLE_ENVIRON not set``.
|
||||
- Enable execution of ELF files from NSH: ``CONFIG_NSH_FILE_APPS=y``.
|
||||
|
||||
Then, build the NuttX firmware image and the export package:
|
||||
|
||||
.. code-block:: shell
|
||||
.. code-block:: console
|
||||
|
||||
$ make
|
||||
$ make export
|
||||
|
||||
When ``make export`` completes, you will find a ZIP package in the top-level
|
||||
NuttX directory called ``nuttx-export-x.y.zip`` (where x.y corresponds to the
|
||||
version, determined by the .version file in the same directory). The contents
|
||||
of this ZIP file are organized as follows:
|
||||
NuttX directory called ``nuttx-export-x.y.zip`` (where ``x.y`` corresponds to
|
||||
the version determined by the ``.version`` file in the same directory).
|
||||
The contents of this ZIP file are organized as follows:
|
||||
|
||||
.. code-block:: text
|
||||
|
||||
nuttx-export-x.x
|
||||
|- arch/
|
||||
|- build/
|
||||
|- include/
|
||||
|- libs/
|
||||
|- registry/
|
||||
|- scripts/
|
||||
|- startup/
|
||||
|- tools/
|
||||
|- System.map
|
||||
`- .config
|
||||
|
||||
Add-On Build Directory
|
||||
======================
|
||||
Preparing the Add-On Build Directory
|
||||
====================================
|
||||
|
||||
In order to create the add-on ELF program, you will need:
|
||||
|
||||
1. The export package.
|
||||
2. A program build Makefile.
|
||||
3. A linker script used by the Makefile.
|
||||
2. A Makefile to build the program.
|
||||
3. A linker script to use in the Makefile.
|
||||
|
||||
The example Makefile discussed below assumes the use of a GNU toolchain. Note
|
||||
The example Makefile shown below assumes the use of a GNU toolchain. Note
|
||||
that non-GNU toolchains would likely require a significantly different
|
||||
Makefile and linker script.
|
||||
|
||||
Hello Example
|
||||
=============
|
||||
|
||||
To keep things manageable, let's use a concrete example. Suppose the ELF
|
||||
program that we wish to add to the release code is the simple
|
||||
To keep things manageable, let's use a concrete example. Suppose the ELF
|
||||
program that we wish to add to the release code is the simple
|
||||
source file ``hello.c``:
|
||||
|
||||
.. code-block:: c
|
||||
@@ -172,263 +179,253 @@ source file ``hello.c``:
|
||||
|
||||
int main(int argc, char **argv)
|
||||
{
|
||||
printf("Hello from Add-On Program!\n");
|
||||
printf("Hello from a partially linked Add-On Program!\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
Let's say that we have a directory called ``addon`` that contains the following:
|
||||
Let's say that we have a directory called ``addon`` that contains
|
||||
the following:
|
||||
|
||||
1. The ``hello.c`` source file.
|
||||
2. A Makefile to build the ELF program.
|
||||
3. A linker script called ``gnu-elf.ld`` needed by the Makefile.
|
||||
4. The export package ``nuttx-export-7.25.zip``.
|
||||
|
||||
3. The export package ``nuttx-export-x.y.zip``.
|
||||
|
||||
Building the ELF Program
|
||||
========================
|
||||
|
||||
The first step in creating the ELF program is to unzip the export
|
||||
The first step in creating the ELF program is to unzip the export
|
||||
package. Starting in the ``addon`` directory:
|
||||
|
||||
.. code-block:: shell
|
||||
.. code-block:: console
|
||||
|
||||
$ cd addon
|
||||
$ ls
|
||||
gnu-elf.ld hello.c Makefile nuttx-export-7.25.zip
|
||||
hello.c Makefile nuttx-export-x.y.zip
|
||||
|
||||
Where:
|
||||
- ``gnu-elf.ld`` is the linker script.
|
||||
- ``hello.c`` is the example source file.
|
||||
- ``Makefile`` builds the ELF program.
|
||||
- ``nuttx-export-7.25.zip`` is the export package from NuttX 7.25.
|
||||
- ``nuttx-export-x.y.zip`` is the export package from NuttX version ``x.y``.
|
||||
|
||||
Unzip the export package as follows:
|
||||
Unzip the export package and rename the folder for ease of use:
|
||||
|
||||
.. code-block:: shell
|
||||
.. code-block:: console
|
||||
|
||||
$ unzip nuttx-export-7.25.zip
|
||||
$ unzip nuttx-export-x.y.zip
|
||||
$ mv nuttx-export-x.y nuttx-export
|
||||
|
||||
This creates a new directory called ``nuttx-export-7.25``, containing
|
||||
all the content from the released NuttX code required to build
|
||||
This creates a new directory called ``nuttx-export``, containing
|
||||
all the content from the released NuttX code required to build
|
||||
the ELF program.
|
||||
|
||||
|
||||
The Makefile
|
||||
============
|
||||
|
||||
To build the ELF program, simply run:
|
||||
|
||||
.. code-block:: shell
|
||||
.. code-block:: console
|
||||
|
||||
$ make
|
||||
|
||||
This uses the following Makefile to generate several files:
|
||||
- ``hello.o``: The compiled object file for ``hello.c``.
|
||||
- ``hello``: The linked ELF program.
|
||||
|
||||
Only the resulting ``hello`` file is needed.
|
||||
- ``hello.o``: The compiled object file for ``hello.c``.
|
||||
- ``hello``: The partially linked ELF program.
|
||||
|
||||
The Makefile used to create the ELF program is as follows:
|
||||
|
||||
.. code-block:: shell
|
||||
.. note::
|
||||
|
||||
include nuttx-export-7.25/build/Make.defs
|
||||
|
||||
# Long calls are need to call from RAM into FLASH
|
||||
|
||||
ARCHCFLAGS += -mlong-calls
|
||||
ARCHWARNINGS = -Wall -Wstrict-prototypes -Wshadow -Wundef
|
||||
ARCHOPTIMIZATION = -Os -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
|
||||
ARCHINCLUDES = -I. -isystem nuttx-export-7.25/include
|
||||
|
||||
CFLAGS = $(ARCHCPUFLAGS) $(ARCHCFLAGS) $(ARCHWARNINGS) $(ARCHOPTIMIZATION) $(ARCHINCLUDES) -pipe
|
||||
|
||||
CROSSDEV = arm-none-eabi-
|
||||
CC = $(CROSSDEV)gcc
|
||||
LD = $(CROSSDEV)ld
|
||||
STRIP = $(CROSSDEV)strip --strip-unneeded
|
||||
|
||||
# Setup up linker command line options
|
||||
|
||||
LDELFFLAGS = -r -e main
|
||||
LDELFFLAGS += -T gnu-elf.ld
|
||||
|
||||
# This might change in a different environment
|
||||
|
||||
OBJEXT ?= .o
|
||||
|
||||
# This is the generated ELF program
|
||||
|
||||
BIN = hello
|
||||
|
||||
# These are the sources files that we use
|
||||
|
||||
SRCS = hello.c
|
||||
OBJS = $(SRCS:.c=$(OBJEXT))
|
||||
|
||||
# Build targets
|
||||
|
||||
all: $(BIN)
|
||||
.PHONY: clean
|
||||
|
||||
$(OBJS): %$(OBJEXT): %.c
|
||||
$(CC) -c $(CFLAGS) $< -o $@
|
||||
|
||||
$(BIN): $(OBJS)
|
||||
$(LD) $(LDELFFLAGS) -o $@ $^
|
||||
$(STRIP) $(BIN)
|
||||
|
||||
clean:
|
||||
rm -f $(BIN)
|
||||
rm -f *.o
|
||||
When copying the following contents, remember that Makefile indentations
|
||||
must be made with proper tab characters and not just spaces.
|
||||
|
||||
.. code-block:: makefile
|
||||
|
||||
include nuttx-export/scripts/Make.defs
|
||||
|
||||
# Long calls are needed to call from RAM into FLASH
|
||||
|
||||
ARCHCFLAGS += -mlong-calls
|
||||
|
||||
# You may want to check these options against the ones in "nuttx-export/scripts/Make.defs"
|
||||
|
||||
ARCHWARNINGS = -Wall -Wstrict-prototypes -Wshadow -Wundef
|
||||
ARCHOPTIMIZATION = -Os -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
|
||||
ARCHINCLUDES = -I. -isystem nuttx-export/include
|
||||
|
||||
CFLAGS = $(ARCHCFLAGS) $(ARCHWARNINGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES)
|
||||
|
||||
# Setup up linker command line options
|
||||
|
||||
LDELFFLAGS = --relocatable -e main
|
||||
LDELFFLAGS += -T nuttx-export/scripts/gnu-elf.ld
|
||||
|
||||
# This is the generated ELF program
|
||||
|
||||
BIN = hello
|
||||
|
||||
# These are the sources files that we use
|
||||
|
||||
SRCS = hello.c
|
||||
OBJS = $(SRCS:.c=$(OBJEXT))
|
||||
|
||||
# Build targets
|
||||
|
||||
.PHONY: clean
|
||||
|
||||
all: $(BIN)
|
||||
|
||||
$(OBJS): %$(OBJEXT): %.c
|
||||
$(CC) -c $(CFLAGS) -o $@ $<
|
||||
|
||||
$(BIN): $(OBJS)
|
||||
$(LD) $(LDELFFLAGS) -o $@ $^
|
||||
$(STRIP) $@
|
||||
#$(CROSSDEV)objdump -f $@
|
||||
|
||||
clean:
|
||||
rm -f $(BIN)
|
||||
rm -f $(OBJS)
|
||||
|
||||
The Linker Script
|
||||
=================
|
||||
|
||||
The linker script that I am using in this example, gnu-elf.ld,
|
||||
contains the following:
|
||||
The linker script used in this example is the one from the exported
|
||||
NuttX package: ``nuttx-export/scripts/gnu-elf.ld``.
|
||||
|
||||
.. code-block:: shell
|
||||
.. admonition:: Here is an alternative minimal (and possibly outdated) version
|
||||
|
||||
SECTIONS
|
||||
{
|
||||
.text 0x00000000 :
|
||||
{
|
||||
_stext = . ;
|
||||
*(.text)
|
||||
*(.text.*)
|
||||
*(.gnu.warning)
|
||||
*(.stub)
|
||||
*(.glue_7)
|
||||
*(.glue_7t)
|
||||
*(.jcr)
|
||||
_etext = . ;
|
||||
}
|
||||
|
||||
.rodata :
|
||||
{
|
||||
_srodata = . ;
|
||||
*(.rodata)
|
||||
*(.rodata1)
|
||||
*(.rodata.*)
|
||||
*(.gnu.linkonce.r*)
|
||||
_erodata = . ;
|
||||
}
|
||||
|
||||
.data :
|
||||
{
|
||||
_sdata = . ;
|
||||
*(.data)
|
||||
*(.data1)
|
||||
*(.data.*)
|
||||
*(.gnu.linkonce.d*)
|
||||
_edata = . ;
|
||||
}
|
||||
|
||||
.bss :
|
||||
{
|
||||
_sbss = . ;
|
||||
*(.bss)
|
||||
*(.bss.*)
|
||||
*(.sbss)
|
||||
*(.sbss.*)
|
||||
*(.gnu.linkonce.b*)
|
||||
*(COMMON)
|
||||
_ebss = . ;
|
||||
}
|
||||
|
||||
/* Stabs debugging sections. */
|
||||
|
||||
.stab 0 : { *(.stab) }
|
||||
.stabstr 0 : { *(.stabstr) }
|
||||
.stab.excl 0 : { *(.stab.excl) }
|
||||
.stab.exclstr 0 : { *(.stab.exclstr) }
|
||||
.stab.index 0 : { *(.stab.index) }
|
||||
.stab.indexstr 0 : { *(.stab.indexstr) }
|
||||
.comment 0 : { *(.comment) }
|
||||
.debug_abbrev 0 : { *(.debug_abbrev) }
|
||||
.debug_info 0 : { *(.debug_info) }
|
||||
.debug_line 0 : { *(.debug_line) }
|
||||
.debug_pubnames 0 : { *(.debug_pubnames) }
|
||||
.debug_aranges 0 : { *(.debug_aranges) }
|
||||
}
|
||||
.. collapse:: Show content:
|
||||
|
||||
.. code-block:: text
|
||||
|
||||
SECTIONS
|
||||
{
|
||||
.text 0x00000000 :
|
||||
{
|
||||
_stext = . ;
|
||||
*(.text)
|
||||
*(.text.*)
|
||||
*(.gnu.warning)
|
||||
*(.stub)
|
||||
*(.glue_7)
|
||||
*(.glue_7t)
|
||||
*(.jcr)
|
||||
_etext = . ;
|
||||
}
|
||||
|
||||
.rodata :
|
||||
{
|
||||
_srodata = . ;
|
||||
*(.rodata)
|
||||
*(.rodata1)
|
||||
*(.rodata.*)
|
||||
*(.gnu.linkonce.r*)
|
||||
_erodata = . ;
|
||||
}
|
||||
|
||||
.data :
|
||||
{
|
||||
_sdata = . ;
|
||||
*(.data)
|
||||
*(.data1)
|
||||
*(.data.*)
|
||||
*(.gnu.linkonce.d*)
|
||||
_edata = . ;
|
||||
}
|
||||
|
||||
.bss :
|
||||
{
|
||||
_sbss = . ;
|
||||
*(.bss)
|
||||
*(.bss.*)
|
||||
*(.sbss)
|
||||
*(.sbss.*)
|
||||
*(.gnu.linkonce.b*)
|
||||
*(COMMON)
|
||||
_ebss = . ;
|
||||
}
|
||||
|
||||
.stab 0 : { *(.stab) }
|
||||
.stabstr 0 : { *(.stabstr) }
|
||||
.stab.excl 0 : { *(.stab.excl) }
|
||||
.stab.exclstr 0 : { *(.stab.exclstr) }
|
||||
.stab.index 0 : { *(.stab.index) }
|
||||
.stab.indexstr 0 : { *(.stab.indexstr) }
|
||||
.comment 0 : { *(.comment) }
|
||||
.debug_abbrev 0 : { *(.debug_abbrev) }
|
||||
.debug_info 0 : { *(.debug_info) }
|
||||
.debug_line 0 : { *(.debug_line) }
|
||||
.debug_pubnames 0 : { *(.debug_pubnames) }
|
||||
.debug_aranges 0 : { *(.debug_aranges) }
|
||||
}
|
||||
|
||||
Replacing NSH Built-In Functions
|
||||
================================
|
||||
|
||||
Files can be executed by NSH from the command line by simply typing the name
|
||||
of the ELF program. This requires (1) that the feature be enabled with
|
||||
``CONFIG_NSH_FILE_APP=y`` and (2) that support for the PATH variable is
|
||||
enabled with ``CONFIG_BINFMT_EXEPATH=y`` and ``CONFIG_PATH_INITIAL`` set to
|
||||
the mount point of the file system that may contain ELF programs.
|
||||
Files can be executed by NSH from the command line by simply typing the name
|
||||
of the ELF program, given that the following requirements are met:
|
||||
|
||||
In this example, there is no application in the base firmware called
|
||||
1. The feature is enabled with ``CONFIG_NSH_FILE_APP=y``.
|
||||
2. Support for the PATH variable is enabled with ``CONFIG_LIBC_ENVPATH=y``.
|
||||
3. The mount point of the file system that may contain ELF programs is
|
||||
set in ``CONFIG_PATH_INITIAL``.
|
||||
|
||||
In this example, there is no application in the base firmware called
|
||||
``hello``. So attempts to run ``hello`` will fail:
|
||||
|
||||
.. code-block:: shell
|
||||
.. code-block:: text
|
||||
|
||||
nsh> hello
|
||||
nsh: hello: command not found
|
||||
nsh>
|
||||
|
||||
But if we mount the SD card containing the ``hello`` image that we created
|
||||
But if we mount the SD card containing the ``hello`` binary that we created
|
||||
above, then we can successfully execute the ``hello`` command:
|
||||
|
||||
.. code-block:: shell
|
||||
.. code-block:: text
|
||||
|
||||
nsh> mount -t vfat /dev/mmcsd0 /bin
|
||||
nsh> ls /bin
|
||||
/bin:
|
||||
System Volume Information/
|
||||
nsh> mount -t vfat /dev/mmcsd0 /addons
|
||||
nsh> ls /addons
|
||||
/addons:
|
||||
hello
|
||||
nsh> hello
|
||||
Hello from Add-On Program!
|
||||
Hello from a partially linked Add-On Program!
|
||||
nsh>
|
||||
|
||||
Here we showed how you can add a new command to NSH to a product without
|
||||
modifying the base firmware. We can also replace or update an existing
|
||||
built-in application in this way:
|
||||
|
||||
In the above configuration, NSH will first attempt to run the program called
|
||||
``hello`` from the file system. This will fail because we have not yet put
|
||||
our custom ``hello`` ELF program in the file system. So instead, NSH will
|
||||
fallback and execute the built-in application called ``hello``. In this way,
|
||||
any command known to NSH can be replaced from an ELF program installed in a
|
||||
mounted file system directory that can be found via the PATH variable.
|
||||
|
||||
After we do add our custom ``hello`` to the file system, when NSH attempts to
|
||||
run the program called ``hello`` from the file system it will run
|
||||
successfully. The built-in version will be ignored. It has been replaced with
|
||||
the version in the file system.
|
||||
This showed that you can add a new NSH command to a product without
|
||||
modifying the base firmware, but you can also replace or update an existing
|
||||
built-in application: in the above configuration, NSH will first attempt to
|
||||
run the program called ``hello`` from the file system; this will fail because
|
||||
the custom ``hello`` ELF program is not yet available. So instead, NSH will
|
||||
fallback and execute the built-in application called ``hello``. This way,
|
||||
any command known to NSH can be replaced from an ELF program installed in a
|
||||
mounted file system directory specified in the PATH environment variable:
|
||||
after adding the custom ``hello`` binary to the file system, NSH will prefer it
|
||||
over the built-in version when attempting to run the program called ``hello``.
|
||||
|
||||
Tightly Coupled Memories
|
||||
========================
|
||||
|
||||
Most MCUs based on ARMv7-M family processors support some kind of Tightly
|
||||
Coupled Memory (TCM). These TCMs have somewhat different properties for
|
||||
specialized operations. Depending on the bus matrix of the processor, you
|
||||
may not be able to execute programs from the TCM. For instance, the STM32 F4
|
||||
supports Core Coupled Memory (CCM), but since it is tied directly to the
|
||||
D-bus, it cannot be used to execute programs! On the other hand, the STM32F3
|
||||
has a CCM that is accessible to both the D-Bus and the I-Bus, in which case
|
||||
it should be possible to execute programs from this TCM.
|
||||
Most MCUs based on ARMv7-M family processors support some kind of Tightly
|
||||
Coupled Memory (TCM). These TCMs have somewhat different properties for
|
||||
specialized operations. Depending on the bus matrix of the processor, you
|
||||
may not be able to execute programs from the TCM. For instance, the STM32F4
|
||||
supports Core Coupled Memory (CCM) but, since it is tied directly to the
|
||||
D-bus, it cannot be used to execute programs. On the other hand, the STM32F3
|
||||
has a CCM that is accessible to both the D-Bus and the I-Bus, in which case
|
||||
it should be possible to execute programs directly from this TCM.
|
||||
|
||||
.. image:: ./image/system_arch_stm32f42xx_and_f43xx.png
|
||||
|
||||
.. image:: ./image/system_arch_stm32f303xBC_and_f358xC.png
|
||||
|
||||
When ELF programs are loaded into memory, the memory is allocated from the
|
||||
heap via a standard memory allocator. By default with the STM32 F4, the CCM
|
||||
is included in the heap and will typically be allocated first. If CCM memory
|
||||
is allocated to hold the ELF program in memory, then a hard-fault will occur
|
||||
immediately when you try to execute the ELF program in memory.
|
||||
|
||||
Therefore, it is necessary on STM32 F4 platforms to include the following
|
||||
configuration setting:
|
||||
|
||||
.. code-block:: shell
|
||||
|
||||
CONFIG_STM32_CCMEXCLUDE=y
|
||||
|
||||
With that setting, the CCM memory will be excluded from the heap and so will
|
||||
never be allocated for ELF program memory.
|
||||
When ELF programs are loaded into memory, such memory is allocated from the
|
||||
heap via a standard memory allocator. With the STM32F4, the CCM is included
|
||||
in the heap by default and will typically be allocated first. If CCM memory
|
||||
is allocated to hold the loaded ELF program, then a hard-fault will occur
|
||||
immediately when you try to execute it.
|
||||
Therefore, on STM32F4 platforms it is necessary to include the
|
||||
``CONFIG_STM32_CCMEXCLUDE=y`` configuration setting. With it, the CCM
|
||||
memory will be excluded from the heap and will never be allocated for
|
||||
ELF program memory.
|
||||
|
||||
Reference in New Issue
Block a user