144 lines
5.3 KiB
Diff
144 lines
5.3 KiB
Diff
From 04b665b402affb89a5b077516bc306da11af1e84 Mon Sep 17 00:00:00 2001
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From: mengqinggang <mengqinggang@loongson.cn>
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Date: Thu, 18 Jan 2024 19:03:11 +0800
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Subject: [PATCH 051/123] LoongArch: gas: Start a new frag after instructions
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that can be relaxed
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For R_LARCH_TLS_{LE_HI20_R,LE_ADD_R,LD_PC_HI20,GD_PC_HI20, DESC_PC_HI20}
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relocations, start a new frag to get correct eh_frame Call Frame Information
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FDE DW_CFA_advance_loc info.
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---
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gas/config/tc-loongarch.c | 19 ++++++--
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.../relax-cfi-fde-DW_CFA_advance_loc.d | 46 +++++++++++++++++++
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.../relax-cfi-fde-DW_CFA_advance_loc.s | 33 +++++++++++++
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3 files changed, 93 insertions(+), 5 deletions(-)
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create mode 100644 gas/testsuite/gas/loongarch/relax-cfi-fde-DW_CFA_advance_loc.d
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create mode 100644 gas/testsuite/gas/loongarch/relax-cfi-fde-DW_CFA_advance_loc.s
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diff --git a/gas/config/tc-loongarch.c b/gas/config/tc-loongarch.c
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index 49470073..5b7f5137 100644
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--- a/gas/config/tc-loongarch.c
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+++ b/gas/config/tc-loongarch.c
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@@ -1070,13 +1070,22 @@ append_fixp_and_insn (struct loongarch_cl_insn *ip)
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optimized away or compressed by the linker during relaxation, to prevent
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the assembler from computing static offsets across such an instruction.
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- This is necessary to get correct .eh_frame cfa info. If one cfa's two
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- symbol is not in the same frag, it will generate relocs to calculate
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- symbol subtraction. (gas/dw2gencfi.c:output_cfi_insn:
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- if (symbol_get_frag (to) == symbol_get_frag (from))) */
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+ This is necessary to get correct .eh_frame FDE DW_CFA_advance_loc info.
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+ If one cfi_insn_data's two symbols are not in the same frag, it will
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+ generate ADD and SUB relocations pairs to calculate DW_CFA_advance_loc.
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+ (gas/dw2gencfi.c: output_cfi_insn:
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+ if (symbol_get_frag (to) == symbol_get_frag (from)))
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+
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+ For macro instructions, only the first instruction expanded from macro
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+ need to start a new frag. */
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if (LARCH_opts.relax
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&& (BFD_RELOC_LARCH_PCALA_HI20 == reloc_info[0].type
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- || BFD_RELOC_LARCH_GOT_PC_HI20 == reloc_info[0].type))
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+ || BFD_RELOC_LARCH_GOT_PC_HI20 == reloc_info[0].type
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+ || BFD_RELOC_LARCH_TLS_LE_HI20_R == reloc_info[0].type
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+ || BFD_RELOC_LARCH_TLS_LE_ADD_R == reloc_info[0].type
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+ || BFD_RELOC_LARCH_TLS_LD_PC_HI20 == reloc_info[0].type
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+ || BFD_RELOC_LARCH_TLS_GD_PC_HI20 == reloc_info[0].type
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+ || BFD_RELOC_LARCH_TLS_DESC_PC_HI20 == reloc_info[0].type))
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{
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frag_wane (frag_now);
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frag_new (0);
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diff --git a/gas/testsuite/gas/loongarch/relax-cfi-fde-DW_CFA_advance_loc.d b/gas/testsuite/gas/loongarch/relax-cfi-fde-DW_CFA_advance_loc.d
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new file mode 100644
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index 00000000..367039e1
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--- /dev/null
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+++ b/gas/testsuite/gas/loongarch/relax-cfi-fde-DW_CFA_advance_loc.d
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@@ -0,0 +1,46 @@
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+#as: -mrelax
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+#objdump: -Dr -j .eh_frame
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+#skip: loongarch32-*-*
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+
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+.*:[ ]+file format .*
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+
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+
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+Disassembly of section .eh_frame:
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+
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+[ ]*0000000000000000 <.eh_frame>:
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+[ ]+0:[ ]+00000014[ ]+.word[ ]+[ ]+0x00000014
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+[ ]+4:[ ]+00000000[ ]+.word[ ]+[ ]+0x00000000
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+[ ]+8:[ ]+00527a01[ ]+.word[ ]+[ ]+0x00527a01
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+[ ]+c:[ ]+01017c01[ ]+fadd.d[ ]+\$fa1, \$fa0, \$fs7
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+[ ]+10:[ ]+0c030d1b[ ]+.word[ ]+[ ]+0x0c030d1b
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+[ ]+14:[ ]+00000016[ ]+.word[ ]+[ ]+0x00000016
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+[ ]+18:[ ]+00000034[ ]+.word[ ]+[ ]+0x00000034
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+[ ]+1c:[ ]+0000001c[ ]+.word[ ]+[ ]+0x0000001c
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+[ ]+...
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+[ ]+20: R_LARCH_32_PCREL[ ]+L0\^A
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+[ ]+24: R_LARCH_ADD32[ ]+L0\^A
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+[ ]+24: R_LARCH_SUB32[ ]+L0\^A
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+[ ]+28:[ ]+0cd64000[ ]+.word[ ]+[ ]+0x0cd64000
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+[ ]+29: R_LARCH_ADD6[ ]+L0\^A
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+[ ]+29: R_LARCH_SUB6[ ]+L0\^A
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+[ ]+2c:[ ]+d6400016[ ]+.word[ ]+[ ]+0xd6400016
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+[ ]+2e: R_LARCH_ADD6[ ]+L0\^A
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+[ ]+2e: R_LARCH_SUB6[ ]+L0\^A
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+[ ]+30:[ ]+4000160c[ ]+beqz[ ]+\$t4, 3145748[ ]+# 300044 <L0\^A\+0x30000c>
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+[ ]+33: R_LARCH_ADD6[ ]+L0\^A
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+[ ]+33: R_LARCH_SUB6[ ]+L0\^A
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+[ ]+34:[ ]+00160cd6[ ]+orn[ ]+\$fp, \$a2, \$sp
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+[ ]+38:[ ]+160cd640[ ]+lu32i.d[ ]+\$zero, 26290
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+[ ]+38: R_LARCH_ADD6[ ]+L0\^A
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+[ ]+38: R_LARCH_SUB6[ ]+L0\^A
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+[ ]+3c:[ ]+0cd64000[ ]+.word[ ]+[ ]+0x0cd64000
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+[ ]+3d: R_LARCH_ADD6[ ]+L0\^A
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+[ ]+3d: R_LARCH_SUB6[ ]+L0\^A
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+[ ]+40:[ ]+d6400016[ ]+.word[ ]+[ ]+0xd6400016
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+[ ]+42: R_LARCH_ADD6[ ]+L0\^A
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+[ ]+42: R_LARCH_SUB6[ ]+L0\^A
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+[ ]+44:[ ]+4000160c[ ]+beqz[ ]+\$t4, 3145748[ ]+# 300058 <L0\^A\+0x300020>
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+[ ]+47: R_LARCH_ADD6[ ]+L0\^A
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+[ ]+47: R_LARCH_SUB6[ ]+L0\^A
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+[ ]+48:[ ]+000000d6[ ]+.word[ ]+[ ]+0x000000d6
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+[ ]+4c:[ ]+00000000[ ]+.word[ ]+[ ]+0x00000000
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diff --git a/gas/testsuite/gas/loongarch/relax-cfi-fde-DW_CFA_advance_loc.s b/gas/testsuite/gas/loongarch/relax-cfi-fde-DW_CFA_advance_loc.s
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new file mode 100644
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index 00000000..6e4c9b8b
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--- /dev/null
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+++ b/gas/testsuite/gas/loongarch/relax-cfi-fde-DW_CFA_advance_loc.s
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@@ -0,0 +1,33 @@
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+# Emits ADD/SUB relocations for CFA FDE DW_CFA_advance_loc with -mrelax option.
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+.text
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+.cfi_startproc
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+
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+.cfi_def_cfa 22, 0
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+la.local $t0, a
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+.cfi_restore 22
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+
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+.cfi_def_cfa 22, 0
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+la.got $t0, a
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+.cfi_restore 22
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+
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+.cfi_def_cfa 22, 0
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+la.tls.ld $t0, a
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+.cfi_restore 22
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+
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+.cfi_def_cfa 22, 0
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+la.tls.gd $t0, a
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+.cfi_restore 22
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+
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+.cfi_def_cfa 22, 0
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+la.tls.desc $t0, a
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+.cfi_restore 22
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+
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+.cfi_def_cfa 22, 0
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+pcalau12i $t0, %le_hi20_r(a)
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+.cfi_restore 22
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+
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+.cfi_def_cfa 22, 0
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+add.d $t0, $tp, $t0, %le_add_r(a)
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+.cfi_restore 22
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+
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+.cfi_endproc
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--
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2.33.0
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