49 lines
817 B
ArmAsm
49 lines
817 B
ArmAsm
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.section .text
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.global _tls_alloc
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.global __tls_map
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.align 4
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_tls_alloc:
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pushl $tls_mutex
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call ___mutex_lock
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popl %eax
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movl tls_map_start, %edx
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.align 4
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.test:
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bsfl (%edx), %eax
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jnz .done
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add $4, %edx
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cmpl $128+__tls_map, %edx
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jb .test
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xorl %eax, %eax
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mov %eax, tls_mutex
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ret
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.done:
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btrl %eax, (%edx)
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movl %edx, tls_map_start
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movl $0, tls_mutex
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subl $__tls_map, %edx
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leal (%eax, %edx, 8), %eax
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shll $2, %eax
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ret
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.section .data
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tls_mutex: .long(0)
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tls_map_start: .long(__tls_map)
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.section .bss
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.align 16
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__tls_map: .space 128
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