[JITLink][AArch32] Multi-stub support for armv7/thumbv7 #78371
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✅ With the latest revision this PR passed the C/C++ code formatter. |
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This is a pretty isolated change in JITLink AArch32. Related design questions were discussed in #78369. It seems worth landing before release/18.x branches. If there are any questions about the code here, I am happy to discuss post-commit. Pre-merge tests had passed before rebasing. |
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This function is used in jitlink-check lines for LIT testing. In llvm#78371 I missed to swap initial instruction bytes for systems that store the constants as big-endian.
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This function is used in `jitlink-check` lines in LIT tests. In #78371 I missed to swap initial instruction bytes for systems that store the constants as big-endian.
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This function is used in `jitlink-check` lines in LIT tests. In llvm#78371 I missed to swap initial instruction bytes for systems that store the constants as big-endian. (cherry picked from commit 8a5bdd8)
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This function is used in `jitlink-check` lines in LIT tests. In llvm#78371 I missed to swap initial instruction bytes for systems that store the constants as big-endian. (cherry picked from commit 8a5bdd8)
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This function is used in `jitlink-check` lines in LIT tests. In llvm#78371 I missed to swap initial instruction bytes for systems that store the constants as big-endian. (cherry picked from commit 8a5bdd8)
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This function is used in `jitlink-check` lines in LIT tests. In llvm#78371 I missed to swap initial instruction bytes for systems that store the constants as big-endian. (cherry picked from commit 8a5bdd8)
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This function is used in `jitlink-check` lines in LIT tests. In llvm#78371 I missed to swap initial instruction bytes for systems that store the constants as big-endian. (cherry picked from commit 8a5bdd8)
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This function is used in `jitlink-check` lines in LIT tests. In llvm#78371 I missed to swap initial instruction bytes for systems that store the constants as big-endian. (cherry picked from commit 8a5bdd8)
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We want to emit stubs that match the instruction set state of the relocation site. This is important for branches that have no built-in switch for the instruction set state. It's the case for Jump24 relocations. Relocations on instructions support switching on the fly should be fixed up in a relaxation step in the future. This affects Call relocations on
BL/BLXinstructions.In this patch, the StubManager gains a second stub symbol slot for each target and selects which one to use based on the relocation type. For testing, we select the appropriate slot with a stub-kind filter, i.e.
armorthumb. With that we implements Armv7 stubs and test that we can have both kinds of stubs for a single external symbol.