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9 Commits

Author SHA1 Message Date
mengqinggang
16d47c1594 LoongArch: Fix tst-gnu2-tls2 compiler error 
Add -mno-lsx to tst-gnu2-tlsmod*.c if gcc support -mno-lsx.
Add escape character '\' in vector support test function.
 2024-05-21 11:23:03 +08:00
mengqinggang
1dbf2bef79 LoongArch: Add support for TLS Descriptors 
This is mostly based on AArch64 and RISC-V implementation.

Add R_LARCH_TLS_DESC32 and R_LARCH_TLS_DESC64 relocations.

For _dl_tlsdesc_dynamic function slow path, temporarily save and restore
all vector registers.
 2024-05-15 10:31:53 +08:00
caiyinyu
095067efdf LoongArch: Add glibc.cpu.hwcap support. 
The current IFUNC selection is always using the most recent
features which are available via AT_HWCAP.  But in
some scenarios it is useful to adjust this selection.

The environment variable:

GLIBC_TUNABLES=glibc.cpu.hwcaps=-xxx,yyy,zzz,....

can be used to enable HWCAP feature yyy, disable HWCAP feature xxx,
where the feature name is case-sensitive and has to match the ones
used in sysdeps/loongarch/cpu-tunables.c.

Signed-off-by: caiyinyu <caiyinyu@loongson.cn>
 2024-04-24 18:22:38 +08:00
caiyinyu
672b91ba10 Revert "LoongArch: Add glibc.cpu.hwcap support." 
This reverts commit a53451559d.
 2023-09-21 09:10:11 +08:00
caiyinyu
a53451559d LoongArch: Add glibc.cpu.hwcap support. 
Key Points:
1. On lasx & lsx platforms, We must use _dl_runtime_{profile, resolve}_{lsx, lasx}
   to save vector registers.
2. Via "tunables", users can choose str/mem_{lasx,lsx,unaligned} functions with
   `export GLIBC_TUNABLES=glibc.cpu.hwcaps=LASX,...`.
   Note: glibc.cpu.hwcaps doesn't affect _dl_runtime_{profile, resolve}_{lsx, lasx}
   selection.

Usage Notes:
1. Only valid inputs: LASX, LSX, UAL. Case-sensitive, comma-separated, no spaces.
2. Example: `export GLIBC_TUNABLES=glibc.cpu.hwcaps=LASX,UAL` turns on LASX & UAL.
   Unmentioned features turn off. With default ifunc: lasx > lsx > unaligned >
   aligned > generic, effect is: lasx > unaligned > aligned > generic; lsx off.
3. Incorrect GLIBC_TUNABLES settings will show error messages.
   For example: On lsx platforms, you cannot enable lasx features. If you do
   that, you will get error messages.
4. Valid input examples:
   - GLIBC_TUNABLES=glibc.cpu.hwcaps=LASX: lasx > aligned > generic.
   - GLIBC_TUNABLES=glibc.cpu.hwcaps=LSX,UAL: lsx > unaligned > aligned > generic.
   - GLIBC_TUNABLES=glibc.cpu.hwcaps=LASX,UAL,LASX,UAL,LSX,LASX,UAL: Repetitions
     allowed but not recommended. Results in: lasx > lsx > unaligned > aligned >
     generic.
 2023-09-19 09:11:49 +08:00
caiyinyu
eaa5b1cce8 LoongArch: Add support for dl_runtime_profile 
This commit can fix the FAIL item: elf/tst-sprof-basic.
 2023-06-13 10:27:45 +08:00
Chenghua Xu
9f482b73f4 LoongArch: Use medium cmodel build libc_nonshared.a. 
This patch is used to fix address out-of-bounds error when building
Chrome.
 2022-12-07 10:42:51 +08:00
caiyinyu
930993921f LoongArch: Add soft float support. 2022-09-01 09:10:08 +08:00
caiyinyu
3d87c89815 LoongArch: Build Infrastructure 2022-07-26 12:35:12 -03:00