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[cxx/system]: fix init_priority ordering on RISCV

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* C++ init_priority attributes work now on RISCV
* Add debug output for init_array functions

Closes IDF-2206
Closes https://github.com/espressif/esp-idf/issues/6351
This commit is contained in:
Jakob Hasse
2020-12-17 11:17:08 +08:00
parent 16291ba7f5
commit ed42758549
3 changed files with 44 additions and 10 deletions
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17
components/esp32c3/ld/esp32c3.project.ld.in
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@@ -304,10 +304,21 @@ SECTIONS
__eh_frame = ABSOLUTE(.);
KEEP(*(.eh_frame))
. = (. + 7) & ~ 3;
/* C++ constructor and destructor tables */
/* Don't include anything from crtbegin.o or crtend.o, as IDF doesn't use toolchain crt */
/*
* C++ constructor and destructor tables
* Don't include anything from crtbegin.o or crtend.o, as IDF doesn't use toolchain crt.
*
* RISC-V gcc is configured with --enable-initfini-array so it emits an .init_array section instead.
* But the init_priority sections will be sorted for iteration in ascending order during startup.
* The rest of the init_array sections is sorted for iteration in descending order during startup, however.
* Hence a different section is generated for the init_priority functions which is iterated in
* ascending order during startup. The corresponding code can be found in startup.c.
*/
__init_priority_array_start = ABSOLUTE(.);
KEEP (*(EXCLUDE_FILE (*crtend.* *crtbegin.*) .init_array.*))
__init_priority_array_end = ABSOLUTE(.);
__init_array_start = ABSOLUTE(.);
KEEP (*(EXCLUDE_FILE (*crtend.* *crtbegin.*) .init_array .ctors .ctors.*))
KEEP (*(EXCLUDE_FILE (*crtend.* *crtbegin.*) .init_array))
__init_array_end = ABSOLUTE(.);
KEEP (*crtbegin.*(.dtors))
KEEP (*(EXCLUDE_FILE (*crtend.*) .dtors))