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Kernel: Support TLS allocation from userspace
This adds an allocate_tls syscall through which a userspace process can request the allocation of a TLS region with a given size. This will be used by the dynamic loader to allocate TLS for the main executable & its libraries.
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5 changed files with 57 additions and 1 deletions
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@ -87,4 +87,14 @@ int minherit(void* address, size_t size, int inherit)
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int rc = syscall(SC_minherit, address, size, inherit);
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__RETURN_WITH_ERRNO(rc, rc, -1);
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}
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void* allocate_tls(size_t size)
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{
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int rc = syscall(SC_allocate_tls, size);
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if (rc < 0 && -rc < EMAXERRNO) {
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errno = -rc;
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return MAP_FAILED;
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}
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return (void*)rc;
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}
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}
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