sched/tls: Shouldn't get tls info directly from sp in kernel space

[xiaoxiang781216]

Summary

since the stack may switch to the kernel or interrupt stack. Report here: #6337.

Impact

fail to get the tls info in case of CONFIG_TLS_ALIGNED = y

Testing

rv-virt:knsh64

[masayuki2009]

@xiaoxiang781216

I tried this PR with rv-virt:knsh64, but it failed.
The issue also happened with sabre-6quad:knsh.

$ qemu-system-riscv64 -semihosting -nographic -cpu rv64 -smp 8 -M virt -bios none -kernel ./nuttx
ABC[    0.000000] up_assert: Assertion failed at file:init/nx_bringup.c line: 297 task: Idle Task
[    0.000000] up_assert: Assertion failed at file:common/riscv_swint.c line: 189 task: Idle Task
[    0.000000] riscv_registerdump: EPC: 0000000080007202
[    0.000000] riscv_registerdump: A0: 0000000000000000 A1: 0000000000000000 A2: 0000000010000000 A3: 0000000000000001
[    0.000000] riscv_registerdump: A4: 0000000000000001 A5: 0000000000000000 A6: 0000000000000074 A7: 000000000000006a
[    0.000000] riscv_registerdump: T0: 00000000000001ff T1: 000000000000006c T2: 000000000000002d T3: 0000000000000068
[    0.000000] riscv_registerdump: T4: 0000000000000009 T5: 000000000000002a T6: 000000000000002e
[    0.000000] riscv_registerdump: S0: 0000000080200928 S1: 0000000080206b30 S2: 0000000080200928 S3: 0000000080200918
[    0.000000] riscv_registerdump: S4: 0000000080201050 S5: 0000000000000000 S6: 0000000000000000 S7: 0000000000000000
[    0.000000] riscv_registerdump: S8: 0000000000000000 S9: 0000000000000000 S10: 0000000000000000 S11: 0000000000000000
[    0.000000] riscv_registerdump: SP: 0000000080206b20 FP: 0000000080200928 TP: 0000000000000000 RA: 0000000080007202
[    0.000000] riscv_dumpstate: sp:     0000000080200850
[    0.000000] riscv_dumpstate: IRQ stack:
[    0.000000] riscv_dumpstate:   base: 00000000802000f0
[    0.000000] riscv_dumpstate:   size: 0000000000000800
[    0.000000] riscv_stackdump: 0000000080200840: 802000f0 00000000 80006ce0 00000000 000000bd 00000000 80015160 00000000
[    0.000000] riscv_stackdump: 0000000080200860: deadbeef deadbeef 00000000 00000000 80201050 00000000 80200918 00000000
[    0.000000] riscv_stackdump: 0000000080200880: 80201050 00000000 80206a18 00000000 80206a18 00000000 800043ac 00000000
[    0.000000] riscv_stackdump: 00000000802008a0: deadbeef deadbeef 800015f6 00000000 80200928 00000000 80201050 00000000
[    0.000000] riscv_stackdump: 00000000802008c0: 80206a18 00000000 80001812 00000000 deadbeef deadbeef 00000100 00000000
[    0.000000] riscv_dumpstate: sp:     0000000080206b20
[    0.000000] riscv_dumpstate: User stack:
[    0.000000] riscv_dumpstate:   base: 0000000080206030
[    0.000000] riscv_dumpstate:   size: 0000000000000bd0
[    0.000000] riscv_dumpstate: User Stack
[    0.000000] riscv_stackdump: 0000000080206b20: 00000000 00000000 80006e74 00000000 00000129 00000000 800152a8 00000000
[    0.000000] riscv_stackdump: 0000000080206b40: 00000000 00000000 00000000 00000000 00000000 00000000 80200918 00000000
[    0.000000] riscv_stackdump: 0000000080206b60: 80201064 00000000 80201068 00000000 80200928 00000000 800043ac 00000000
[    0.000000] riscv_stackdump: 0000000080206b80: 80200928 00000000 80001b48 00000000 80200928 00000000 80016400 00000000
[    0.000000] riscv_stackdump: 0000000080206ba0: 80200928 00000000 80001a94 00000000 80400000 00000000 00400000 00000000
[    0.000000] riscv_stackdump: 0000000080206bc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[    0.000000] riscv_stackdump: 0000000080206be0: 00000000 00000000 80000d72 00000000 00000000 00000000 80000046 00000000
[    0.000000] riscv_showtasks:    PID    PRI      USED     STACK   FILLED    COMMAND
[    0.000000] riscv_showtasks:   ----   ----       744      2048    36.3%    irq
[    0.000000] riscv_dump_task:      0      0      1328      3024    43.9%    Idle Task

If I enable debug messages, it seems that the symbol tls_get_info was not found.

[    0.000000] elf_symvalue: SHN_UNDEF: Exported symbol "tls_get_info" not found
[    0.000000] elf_relocateadd: Section 2 reloc 4815: Failed to get value of symbol[38794]: -2
[    0.000000] elf_loadbinary: Failed to bind symbols program binary: -2
[    0.000000] exec_spawn: ERROR: Failed to load program '/system/bin/init': -2
[    0.000000] up_assert: Assertion failed at file:init/nx_bringup.c line: 297 task: Idle Task
[    0.000000] up_assert: Assertion failed at file:common/riscv_swint.c line: 189 task: Idle Task

[xiaoxiang781216]

Sorry, @masayuki2009 I just rebuild the kernel not hello elf, so the error isn't catch locally.

[masayuki2009]

@xiaoxiang781216

I confirmed that this PR fixes the issue.