71 lines
2.8 KiB
Diff
71 lines
2.8 KiB
Diff
From c0b63b89a03c11bf6383f0175b60614d73295463 Mon Sep 17 00:00:00 2001
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From: Xi Ruoyao <xry111@xry111.site>
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Date: Mon, 22 Jan 2024 18:07:42 +0800
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Subject: [PATCH 116/188] LoongArch: Disable explicit reloc for TLS LD/GD with
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-mexplicit-relocs=auto
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Binutils 2.42 supports TLS LD/GD relaxation which requires the assembler
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macro.
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gcc/ChangeLog:
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* config/loongarch/loongarch.cc (loongarch_explicit_relocs_p):
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If la_opt_explicit_relocs is EXPLICIT_RELOCS_AUTO, return false
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for SYMBOL_TLS_LDM and SYMBOL_TLS_GD.
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(loongarch_call_tls_get_addr): Do not split symbols of
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SYMBOL_TLS_LDM or SYMBOL_TLS_GD if la_opt_explicit_relocs is
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EXPLICIT_RELOCS_AUTO.
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gcc/testsuite/ChangeLog:
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* gcc.target/loongarch/explicit-relocs-auto-tls-ld-gd.c: Check
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for la.tls.ld and la.tls.gd.
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---
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gcc/config/loongarch/loongarch.cc | 10 +++++-----
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.../loongarch/explicit-relocs-auto-tls-ld-gd.c | 3 ++-
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2 files changed, 7 insertions(+), 6 deletions(-)
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diff --git a/gcc/config/loongarch/loongarch.cc b/gcc/config/loongarch/loongarch.cc
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index 7da00c132..5f22b9dd8 100644
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--- a/gcc/config/loongarch/loongarch.cc
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+++ b/gcc/config/loongarch/loongarch.cc
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@@ -1967,11 +1967,11 @@ loongarch_explicit_relocs_p (enum loongarch_symbol_type type)
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{
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case SYMBOL_TLS_IE:
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case SYMBOL_TLS_LE:
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- case SYMBOL_TLSGD:
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- case SYMBOL_TLSLDM:
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case SYMBOL_PCREL64:
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- /* The linker don't know how to relax TLS accesses or 64-bit
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- pc-relative accesses. */
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+ /* TLS IE cannot be relaxed. TLS LE relaxation is different from
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+ the normal R_LARCH_RELAX-based relaxation and it **requires**
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+ using the explicit %le_{lo12,hi20,add}_r relocs. The linker
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+ does not relax 64-bit pc-relative accesses as at now. */
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return true;
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case SYMBOL_GOT_DISP:
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/* The linker don't know how to relax GOT accesses in extreme
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@@ -2785,7 +2785,7 @@ loongarch_call_tls_get_addr (rtx sym, enum loongarch_symbol_type type, rtx v0)
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start_sequence ();
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- if (la_opt_explicit_relocs != EXPLICIT_RELOCS_NONE)
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+ if (la_opt_explicit_relocs == EXPLICIT_RELOCS_ALWAYS)
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{
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/* Split tls symbol to high and low. */
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rtx high = gen_rtx_HIGH (Pmode, copy_rtx (loc));
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diff --git a/gcc/testsuite/gcc.target/loongarch/explicit-relocs-auto-tls-ld-gd.c b/gcc/testsuite/gcc.target/loongarch/explicit-relocs-auto-tls-ld-gd.c
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index 957ff98df..ca55fcfc5 100644
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--- a/gcc/testsuite/gcc.target/loongarch/explicit-relocs-auto-tls-ld-gd.c
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+++ b/gcc/testsuite/gcc.target/loongarch/explicit-relocs-auto-tls-ld-gd.c
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@@ -6,4 +6,5 @@ extern __thread int b __attribute__((visibility("default")));
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int test() { return a + b; }
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-/* { dg-final { scan-assembler-not "la.tls" { target tls_native } } } */
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+/* { dg-final { scan-assembler "la\\.tls\\.ld" { target tls_native } } } */
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+/* { dg-final { scan-assembler "la\\.tls\\.gd" { target tls_native } } } */
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--
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2.43.0
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