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sys_sbrk does not match semantics of sbrk call #563

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cahirwpz opened this issue Oct 16, 2019 · 0 comments
Open

sys_sbrk does not match semantics of sbrk call #563

cahirwpz opened this issue Oct 16, 2019 · 0 comments

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@cahirwpz
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cahirwpz commented Oct 16, 2019 •
edited

sbrk should extend .bss segment instead of being kept in a separate vm_segment.
Moreover one cannot extend program's break above _etext + RLIMIT_DATA on one hand, and cannot shrink below _etext.

Can we drop a support for sbrk in the kernel altogether? Could we emulate it with mmap?
@cahirwpz cahirwpz added the accepted accepted by the maintainer for code review label Oct 16, 2019
@cahirwpz cahirwpz removed the accepted accepted by the maintainer for code review label Jan 11, 2021
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