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Fix thread-local storage bugs on aarch64

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This change fixes an issue where .tbss memory might not be initialized.
This commit is contained in:
Justine Tunney 2024-05-08 04:03:51 -07:00
parent 793393a341
commit ae2a7ac844
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GPG key ID: BE714B4575D6E328
6 changed files with 93 additions and 65 deletions
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7
ape/aarch64.lds
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@ -293,7 +293,6 @@ _tdata_size = _tdata_end - _tdata_start;
_tbss_size = _tbss_end - _tbss_start;
_tbss_offset = _tbss_start - _tdata_start;
_tls_content = (_tdata_end - _tdata_start) + (_tbss_end - _tbss_start);
_tls_align = MAX(ALIGNOF(.tdata), ALIGNOF(.tbss));
ASSERT(ALIGNOF(.tdata) <= TLS_ALIGNMENT && ALIGNOF(.tbss) <= TLS_ALIGNMENT,
"_Thread_local _Alignof can't exceed TLS_ALIGNMENT");
_tdata_align = ALIGNOF(.tdata);
_tbss_align = ALIGNOF(.tbss);
_tls_align = MAX(TLS_ALIGNMENT, MAX(ALIGNOF(.tdata), ALIGNOF(.tbss)));

4
ape/ape.lds
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@ -553,7 +553,9 @@ _tdata_size = _tdata_end - _tdata_start;
_tbss_size = _tbss_end - _tbss_start;
_tbss_offset = _tbss_start - _tdata_start;
_tls_content = (_tdata_end - _tdata_start) + (_tbss_end - _tbss_start);
_tls_align = 1;
_tdata_align = ALIGNOF(.tdata);
_tbss_align = ALIGNOF(.tbss);
_tls_align = MAX(TLS_ALIGNMENT, MAX(ALIGNOF(.tdata), ALIGNOF(.tbss)));
ape_cod_offset = 0;
ape_cod_vaddr = ADDR(.head);

2
ape/sections.internal.h
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@ -16,6 +16,8 @@ extern unsigned char _tdata_end[] __attribute__((__weak__));
extern unsigned char _tbss_start[] __attribute__((__weak__));
extern unsigned char _tbss_end[] __attribute__((__weak__));
extern unsigned char _tls_align[] __attribute__((__weak__));
extern unsigned char _tdata_align[] __attribute__((__weak__));
extern unsigned char _tbss_align[] __attribute__((__weak__));
extern unsigned char __test_start[] __attribute__((__weak__));
extern unsigned char __ro[] __attribute__((__weak__));
extern unsigned char __data_start[] __attribute__((__weak__));