libc/machine/arm: move setjmp definition to libc for loadable

[abhishek-samsung]

generally setjmp and longjump as provided as a part of libc. So, moved setjmp.S to libc. In this way, we also support setjmp in both flat and loadable.

Verification was done on artik flat, rtl8721csm flat, rtl8730e flat and loadable.

artik flat :

TASH>>setjmp_test
diving(1, R, 0x2036584)
diving(2, R, 0x203646c)
diving(3, R, 0x2036344)
diving(4, R, 0x203621c)
diving(5, R, 0x20360f4)
diving(6, R, 0x2035fcc)
diving(7, R, 0x2035ea4)
diving(8, R, 0x2035d7c)
return(8, R, 0x2035d7c)
return(7, R, 0x2035ea4)
return(6, R, 0x2035fcc)
return(5, R, 0x20360f4)
return(4, R, 0x203621c)
return(3, R, 0x2036344)
return(2, R, 0x203646c)
return(1, R, 0x2036584)
setjmp does not break function return
diving(1, L, 0x2036584)
diving(2, L, 0x203646c)
diving(3, L, 0x2036344)
diving(4, L, 0x203621c)
diving(5, L, 0x20360f4)
diving(6, L, 0x2035fcc)
diving(7, L, 0x2035ea4)
diving(8, L, 0x2035d7c)
ascending(8, L, 0x2035d7c)
ascending(7, L, 0x2035ea4)
ascending(6, L, 0x2035fcc)
ascending(5, L, 0x20360f4)
ascending(4, L, 0x203621c)
ascending(3, L, 0x2036344)
ascending(2, L, 0x203646c)
ascending(1, L, 0x2036584)
setjmp skips a single stack frame
diving(1, E, 0x2036584)
diving(2, E, 0x2036584)
diving(3, E, 0x2036584)
diving(4, E, 0x2036584)
diving(5, E, 0x2036584)
diving(6, E, 0x2036584)
diving(7, E, 0x2036584)
diving(8, E, 0x2036584)
ascending(8, E, 0x2036584)
setjmp skips multiple frames
TASH>>

rtl8730e loadable :

[RTW]: ** Band = 2.4G and 5G **
binary_manager_load: app1 Header Checking Success
dump_module: Module:
dump_module:   filename:  /dev/mtdblock6
dump_module:   argv:      0
dump_module:   entrypt:   0xe45c079
dump_module:   start of alloc:     0xe45c030
dump_module:   alloc:     0 0
dump_module:   ctors:     0xe45c1b1 nctors=0
dump_module:   dtors:     0 ndtors=0
dump_module:   stacksize: 8192
dump_module:   unload:    0
System Information:
        Version:
                Platform: 3.1   Binary: 200204
        Commit Hash: 44e8583
        Build User: root@=
        Build Time: 2024-07-05 15:43:19 IST
        System Time: 05 Jul 2024, 00:00:00 [s] UTC Hardware RTC Support
TASH>>This is WIFI App

Select Test Scenario.
        -Press X or x : Terminate Tests.
binary_manager_load_binary: Load success! [Name: app1] [Version: 190412] [Partition: A] [Text start : 0x0e45c030] [Compressed Binary]
KM4 version:  km4_application_ver_68a34c3d71_2024/06/25-16:14:09
Test will be finished.

TASH>>setjmp_test
diving(1, R, 0x60605f34)
diving(2, R, 0x60605e1c)
diving(3, R, 0x60605cf4)
diving(4, R, 0x60605bcc)
diving(5, R, 0x60605aa4)
diving(6, R, 0x6060597c)
diving(7, R, 0x60605854)
diving(8, R, 0x6060572c)
return(8, R, 0x6060572c)
return(7, R, 0x60605854)
return(6, R, 0x6060597c)
return(5, R, 0x60605aa4)
return(4, R, 0x60605bcc)
return(3, R, 0x60605cf4)
return(2, R, 0x60605e1c)
return(1, R, 0x60605f34)
setjmp does not break function return
diving(1, L, 0x60605f34)
diving(2, L, 0x60605e1c)
diving(3, L, 0x60605cf4)
diving(4, L, 0x60605bcc)
diving(5, L, 0x60605aa4)
diving(6, L, 0x6060597c)
diving(7, L, 0x60605854)
diving(8, L, 0x6060572c)
ascending(8, L, 0x6060572c)
ascending(7, L, 0x60605854)
ascending(6, L, 0x6060597c)
ascending(5, L, 0x60605aa4)
ascending(4, L, 0x60605bcc)
ascending(3, L, 0x60605cf4)
ascending(2, L, 0x60605e1c)
ascending(1, L, 0x60605f34)
setjmp skips a single stack frame
diving(1, E, 0x60605f34)
diving(2, E, 0x60605f34)
diving(3, E, 0x60605f34)
diving(4, E, 0x60605f34)
diving(5, E, 0x60605f34)
diving(6, E, 0x60605f34)
diving(7, E, 0x60605f34)
diving(8, E, 0x60605f34)
ascending(8, E, 0x60605f34)
setjmp skips multiple frames
TASH>>

[abhishek-samsung]

@prabu-r, @kishore-sn please review

[sunghan-chang]

@abhishek-samsung Let's leave your test result in the commit description like pr description.

[edwakuwaku]

Hello @abhishek-samsung , I saw this during compilation:

AS:  machine/arm/setjmp.S
setjmp.S: Assembler messages:
setjmp.S:90: Warning: section does not have enough alignment to ensure safe PC-relative loads

Will this warning reflect to any negative effect during runtime?

[abhishek-samsung]

Hello @abhishek-samsung , I saw this during compilation:

AS:  machine/arm/setjmp.S
setjmp.S: Assembler messages:
setjmp.S:90: Warning: section does not have enough alignment to ensure safe PC-relative loads

Will this warning reflect to any negative effect during runtime?

I tested the sample app and it was working. I missed this warning message. Thanks for pointing it out. I have raised PR https://github.com/Samsung/TizenRT/pull/6282 to fix the warning.