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https://github.com/fluencelabs/musl
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34aa169dcf
a while back, gcc switched from using the old _init/_fini fragments method for calling ctors and dtors on arm to the __init_array and __fini_array method. unfortunately, on glibc this depends on ugly hacks involving making libc.so a linker script and pulling parts of libc into the main program binary. so I cheat a little bit, and just write asm to iterate over the init/fini arrays from the _init/_fini asm. the same approach could be used on any arch it's needed on, but for now arm is the only one.
28 lines
382 B
ArmAsm
28 lines
382 B
ArmAsm
.section .init
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.global _init
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_init:
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push {r0,r1,r2,r4,r5,lr}
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.weak __fini_array_start
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.weak __fini_array_end
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.section .fini
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.global _fini
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_fini:
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push {r4,r5,r6,lr}
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adr lr, 1f
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ldr r4, 2f
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ldr r5, 2f+4
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add r4, r4, lr
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add r5, r5, lr
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1: adr lr, 1b
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cmp r4, r5
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beq 3f
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ldmia r4!, {r3}
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tst r3,#1
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moveq pc,r3
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bx r3
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2: .word __fini_array_start-1b
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.word __fini_array_end-1b
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3:
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