FreeChainXenon/gcc
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

LoongArch: Disable explicit reloc for TLS LD/GD with -mexplicit-relocs=auto

Browse source 
Binutils 2.42 supports TLS LD/GD relaxation which requires the assembler
macro.

gcc/ChangeLog:

	* config/loongarch/loongarch.cc (loongarch_explicit_relocs_p):
	If la_opt_explicit_relocs is EXPLICIT_RELOCS_AUTO, return false
	for SYMBOL_TLS_LDM and SYMBOL_TLS_GD.
	(loongarch_call_tls_get_addr): Do not split symbols of
	SYMBOL_TLS_LDM or SYMBOL_TLS_GD if la_opt_explicit_relocs is
	EXPLICIT_RELOCS_AUTO.

gcc/testsuite/ChangeLog:

	* gcc.target/loongarch/explicit-relocs-auto-tls-ld-gd.c: Check
	for la.tls.ld and la.tls.gd.
This commit is contained in:
Xi Ruoyao 2024-01-22 18:07:42 +08:00
parent 23ebb09ed2
commit f12317306e
No known key found for this signature in database
GPG key ID: ACAAD20E19E710E3
2 changed files with 7 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
gcc/config/loongarch/loongarch.cc
View file

@ -1970,11 +1970,11 @@ loongarch_explicit_relocs_p (enum loongarch_symbol_type type)
{
case SYMBOL_TLS_IE:
case SYMBOL_TLS_LE:
case SYMBOL_TLSGD:
case SYMBOL_TLSLDM:
case SYMBOL_PCREL64:
/* The linker don't know how to relax TLS accesses or 64-bit
pc-relative accesses. */
/* TLS IE cannot be relaxed. TLS LE relaxation is different from
the normal R_LARCH_RELAX-based relaxation and it **requires**
using the explicit %le_{lo12,hi20,add}_r relocs. The linker
does not relax 64-bit pc-relative accesses as at now. */
return true;
case SYMBOL_GOT_DISP:
/* The linker don't know how to relax GOT accesses in extreme
@ -2789,7 +2789,7 @@ loongarch_call_tls_get_addr (rtx sym, enum loongarch_symbol_type type, rtx v0)
start_sequence ();
if (la_opt_explicit_relocs != EXPLICIT_RELOCS_NONE)
if (la_opt_explicit_relocs == EXPLICIT_RELOCS_ALWAYS)
{
/* Split tls symbol to high and low. */
rtx high = gen_rtx_HIGH (Pmode, copy_rtx (loc));

3
gcc/testsuite/gcc.target/loongarch/explicit-relocs-auto-tls-ld-gd.c
View file

@ -6,4 +6,5 @@ extern __thread int b __attribute__((visibility("default")));
int test() { return a + b; }
/* { dg-final { scan-assembler-not "la.tls" { target tls_native } } } */
/* { dg-final { scan-assembler "la\\.tls\\.ld" { target tls_native } } } */
/* { dg-final { scan-assembler "la\\.tls\\.gd" { target tls_native } } } */