Support loading initialized data memory from asm tests #725
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test/test_core.py
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| return { | ||
| "text": load_section(".text"), | ||
| "data": load_section(".data") + load_section(".bss"), |
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This is OK because of the link.ld script? What about alignment, what happens if .data's length is not an integer multiple of 4 bytes? Can this happen?
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that was a problem, now i moved everything to .data inside liker script, so it is address-independent
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I just realized that the way we handle memory in these tests is kind of broken. The reason it didn't come out yet is that .bss and .data sections are always empty for our hand-written assembly tests.
Also having two separate memories (instructions and data separately) is just probably left over from the ancient times of the project.
I would suggest using the same structures as we use in regression/benchmarks/signature tests, i.e. CoreMemoryModel and friends. Storing and accessing the initial values of the registers could be solved by creating our own section in the assembly (and the linker script) and then associating it with a new MemorySegment
test/asm/interrupt.asm
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| @@ -98,3 +100,6 @@ fail: | |||
| .org 0x200 | |||
| j int_handler | |||
| li x31, 0xae # should never happen | |||
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| .bss | |||
| INIT_REGS_ALLOCATION | |||
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.bss section should be always zeroed, so we shouldn't put any preloaded data there
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also: setting the location of .bss in the linker script and then overriding it using .orig is just bad
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Fixed with separate section with origin in liker script
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Initialized data can be now declared in internal asm tests. Data memory size (also with
.bss) is now determined from asm source file, instead of default fixed value.