[PATCH v1] LoongArch: Use less DW_LNS_fixed_advance_pc
mengqinggang
mengqinggang@loongson.cn
Wed Aug 19 03:41:35 GMT 2026
If DWARF2_USE_FIXED_ADVANCE_PC is nonzero, use the DW_LNS_fixed_advance_pc
opcode; otherwise, use special opcodes.
Add FROM symbol and TO symbol parameters for finer-grained control.
Use special opcodes when no linker-relaxable instructions between two symbols;
otherwise, use DW_LNS_fixed_advance_pc opcodes.
Add a new macro DWARF2_USE_FIXED_ADVANCE_PC_FRAG to avoid unnecessary calls
to symbol_get_value_expression on other targets.
---
Changes in V1 (based on Alan's feedback):
- Delete the first DWARF2_USE_FIXED_ADVANCE_PC and always call
resolve_symbol_value with finalize_syms zero in dwarf2dbg_convert_frag.
- Add a new macro DWARF2_USE_FIXED_ADVANCE_PC_FRAG to avoid unnecessary
calls to symbol_get_value_expression on other targets.
gas/config/tc-h8300.h | 2 +-
gas/config/tc-loongarch.c | 25 ++++++++++
gas/config/tc-loongarch.h | 10 +++-
gas/config/tc-msp430.h | 2 +-
gas/config/tc-nds32.h | 2 +-
gas/config/tc-riscv.h | 2 +-
gas/config/tc-rl78.h | 2 +-
gas/config/tc-xtensa.h | 2 +-
gas/dwarf2dbg.c | 49 ++++++++++---------
gas/testsuite/gas/elf/dwarf-5-irp.d | 3 +-
gas/testsuite/gas/elf/dwarf-5-loc0.d | 3 +-
gas/testsuite/gas/elf/dwarf-5-macro-include.d | 2 +-
gas/testsuite/gas/elf/dwarf-5-macro.d | 2 +-
gas/testsuite/gas/elf/dwarf2-11.d | 3 +-
gas/testsuite/gas/elf/dwarf2-15.d | 3 +-
gas/testsuite/gas/elf/dwarf2-16.d | 3 +-
gas/testsuite/gas/elf/dwarf2-17.d | 3 +-
gas/testsuite/gas/elf/dwarf2-18.d | 3 +-
gas/testsuite/gas/elf/dwarf2-19.d | 3 +-
gas/testsuite/gas/elf/dwarf2-5.d | 3 +-
gas/testsuite/gas/lns/lns.exp | 1 -
.../relax-debug-line-opcode-norelax.d | 10 ++++
.../gas/loongarch/relax-debug-line-opcode.d | 25 ++++++++++
.../gas/loongarch/relax-debug-line-opcode.s | 15 ++++++
24 files changed, 125 insertions(+), 53 deletions(-)
create mode 100644 gas/testsuite/gas/loongarch/relax-debug-line-opcode-norelax.d
create mode 100644 gas/testsuite/gas/loongarch/relax-debug-line-opcode.d
create mode 100644 gas/testsuite/gas/loongarch/relax-debug-line-opcode.s
diff --git a/gas/config/tc-h8300.h b/gas/config/tc-h8300.h
index c4689d37b12..66664553a24 100644
--- a/gas/config/tc-h8300.h
+++ b/gas/config/tc-h8300.h
@@ -46,7 +46,7 @@ struct internal_reloc;
/* Minimum instruction is of 16 bits. */
#define DWARF2_LINE_MIN_INSN_LENGTH 2
-#define DWARF2_USE_FIXED_ADVANCE_PC 0
+#define DWARF2_USE_FIXED_ADVANCE_PC(FROM, TO) 0
/* Provide mappings from the original H8 COFF relocation names to
their corresponding BFD relocation names. */
diff --git a/gas/config/tc-loongarch.c b/gas/config/tc-loongarch.c
index bd7d8dabb7a..e02881761fe 100644
--- a/gas/config/tc-loongarch.c
+++ b/gas/config/tc-loongarch.c
@@ -1644,6 +1644,31 @@ _loongarch_force_relocation_sub_same (segT sec,
return true;
}
+/* Use DW_LNS_fixed_advance_pc with relocations if there are linker-relaxable
+ instructions between from and to symbols. Otherwise, use special opcodes
+ without relocations. */
+bool
+loongarch_fixed_advance_pc (symbolS *from, symbolS *to)
+{
+ segT fromsec = S_GET_SEGMENT (from);
+ segT tosec = S_GET_SEGMENT (to);
+ if (fromsec != tosec)
+ return false;
+ fragS *fromfrag = symbol_get_frag (from);
+ fragS *tofrag = symbol_get_frag (to);
+ return _loongarch_force_relocation_sub_same (fromsec, fromfrag, tofrag);
+}
+
+/* Similar to loongarch_fixed_advance_pc, used for frag. */
+bool
+loongarch_fixed_advance_pc_frag (fragS *frag)
+{
+ expressionS *exp = symbol_get_value_expression (frag->fr_symbol);
+
+ if (exp->X_op != O_subtract)
+ return false;
+ return loongarch_fixed_advance_pc (exp->X_op_symbol, exp->X_add_symbol);
+}
/* Postpone text-section label subtraction calculation until linking,
since linker relaxations might change the deltas. */
diff --git a/gas/config/tc-loongarch.h b/gas/config/tc-loongarch.h
index 146844e772e..1f11f9cef46 100644
--- a/gas/config/tc-loongarch.h
+++ b/gas/config/tc-loongarch.h
@@ -101,8 +101,14 @@ extern bool loongarch_force_relocation_sub_same(struct fix *, asection *);
#define MD_APPLY_SYM_VALUE(FIX) 0
#define TARGET_USE_CFIPOP 1
-/* Adjust debug_line after relaxation. */
-#define DWARF2_USE_FIXED_ADVANCE_PC 1
+
+extern bool loongarch_fixed_advance_pc (symbolS *, symbolS *);
+#define DWARF2_USE_FIXED_ADVANCE_PC(FROM, TO) \
+ loongarch_fixed_advance_pc (FROM, TO)
+
+extern bool loongarch_fixed_advance_pc_frag (fragS *);
+#define DWARF2_USE_FIXED_ADVANCE_PC_FRAG(FRAG) \
+ loongarch_fixed_advance_pc_frag (FRAG)
/* FDE Data Alignment Factor.
FDE Code Alignment Factor (DWARF2_LINE_MIN_INSN_LENGTH) should be 1
diff --git a/gas/config/tc-msp430.h b/gas/config/tc-msp430.h
index fe202abc713..f9b6c1e588c 100644
--- a/gas/config/tc-msp430.h
+++ b/gas/config/tc-msp430.h
@@ -168,7 +168,7 @@ extern bool msp430_allow_local_subtract (expressionS *, expressionS *, segT);
so don't report errors at this point. */
#define TC_VALIDATE_FIX_SUB(FIX, SEG) 1
-#define DWARF2_USE_FIXED_ADVANCE_PC 1
+#define DWARF2_USE_FIXED_ADVANCE_PC(FROM, TO) 1
#define TC_LINKRELAX_FIXUP(seg) ((seg->flags & SEC_CODE) || (seg->flags & SEC_DEBUGGING))
diff --git a/gas/config/tc-nds32.h b/gas/config/tc-nds32.h
index 432d46d9fb1..49a1bead095 100644
--- a/gas/config/tc-nds32.h
+++ b/gas/config/tc-nds32.h
@@ -77,7 +77,7 @@ extern bool nds32_allow_local_subtract (expressionS *, expressionS *, segT);
#define md_allow_local_subtract(lhs,rhs,sect) nds32_allow_local_subtract (lhs, rhs, sect)
/* dwarf2dbg.c. */
-#define DWARF2_USE_FIXED_ADVANCE_PC 1
+#define DWARF2_USE_FIXED_ADVANCE_PC(FROM, TO) 1
/* write.c. */
extern long nds32_pcrel_from_section (struct fix *, segT);
diff --git a/gas/config/tc-riscv.h b/gas/config/tc-riscv.h
index d695db83477..7518d2a70f7 100644
--- a/gas/config/tc-riscv.h
+++ b/gas/config/tc-riscv.h
@@ -135,7 +135,7 @@ extern void riscv_elf_section_change_hook (void);
extern void riscv_elf_final_processing (void);
/* Adjust debug_line after relaxation. */
-#define DWARF2_USE_FIXED_ADVANCE_PC 1
+#define DWARF2_USE_FIXED_ADVANCE_PC(FROM, TO) 1
#define md_parse_name(name, exp, mode, c) \
riscv_parse_name (name, exp, mode)
diff --git a/gas/config/tc-rl78.h b/gas/config/tc-rl78.h
index 9761d509aa1..fb54a2e8da7 100644
--- a/gas/config/tc-rl78.h
+++ b/gas/config/tc-rl78.h
@@ -94,6 +94,6 @@ extern void rl78_elf_final_processing (void);
|| ((SEC)->flags & SEC_DEBUGGING) != 0 \
|| TC_FORCE_RELOCATION (FIX))
-#define DWARF2_USE_FIXED_ADVANCE_PC 1
+#define DWARF2_USE_FIXED_ADVANCE_PC(FROM, TO) 1
#define TC_FORCE_RELOCATION(FIX) (linkrelax)
diff --git a/gas/config/tc-xtensa.h b/gas/config/tc-xtensa.h
index 64d735144d7..d6ddac738fe 100644
--- a/gas/config/tc-xtensa.h
+++ b/gas/config/tc-xtensa.h
@@ -419,7 +419,7 @@ extern void xtensa_init (int, char **);
#define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0
/* Use line number format that is amenable to linker relaxation. */
-#define DWARF2_USE_FIXED_ADVANCE_PC (linkrelax != 0)
+#define DWARF2_USE_FIXED_ADVANCE_PC(FROM, TO) (linkrelax != 0)
/* Resource reservation info functions. */
diff --git a/gas/dwarf2dbg.c b/gas/dwarf2dbg.c
index a1ceab4e428..c899eecd26b 100644
--- a/gas/dwarf2dbg.c
+++ b/gas/dwarf2dbg.c
@@ -112,7 +112,13 @@
opcodes and variable-length operands cannot be used. If this macro is
nonzero, use the DW_LNS_fixed_advance_pc opcode instead. */
#ifndef DWARF2_USE_FIXED_ADVANCE_PC
-# define DWARF2_USE_FIXED_ADVANCE_PC linkrelax
+# define DWARF2_USE_FIXED_ADVANCE_PC(FROM, TO) linkrelax
+#endif
+
+/* Similar to DWARF2_USE_FIXED_ADVANCE_PC, used for frag. */
+#ifndef DWARF2_USE_FIXED_ADVANCE_PC_FRAG
+# define DWARF2_USE_FIXED_ADVANCE_PC_FRAG(FRAG) \
+ DWARF2_USE_FIXED_ADVANCE_PC (0, 0)
#endif
/* First special line opcode - leave room for the standard opcodes.
@@ -1898,7 +1904,7 @@ relax_inc_line_addr (int line_delta, symbolS *to_sym, symbolS *from_sym)
/* The maximum size of the frag is the line delta with a maximum
sized address delta. */
- if (DWARF2_USE_FIXED_ADVANCE_PC)
+ if (DWARF2_USE_FIXED_ADVANCE_PC (from_sym, to_sym))
max_chars = size_fixed_inc_line_addr (line_delta,
-DWARF2_LINE_MIN_INSN_LENGTH);
else
@@ -1919,7 +1925,7 @@ dwarf2dbg_estimate_size_before_relax (fragS *frag)
int size;
addr_delta = resolve_symbol_value (frag->fr_symbol);
- if (DWARF2_USE_FIXED_ADVANCE_PC)
+ if (DWARF2_USE_FIXED_ADVANCE_PC_FRAG (frag))
size = size_fixed_inc_line_addr (frag->fr_offset, addr_delta);
else
size = size_inc_line_addr (frag->fr_offset, addr_delta);
@@ -1953,31 +1959,25 @@ dwarf2dbg_convert_frag (fragS *frag)
{
offsetT addr_diff;
- if (DWARF2_USE_FIXED_ADVANCE_PC)
- {
- /* If linker relaxation is enabled then the distance between the two
- symbols in the frag->fr_symbol expression might change. Hence we
- cannot rely upon the value computed by resolve_symbol_value.
- Instead we leave the expression unfinalized and allow
- emit_fixed_inc_line_addr to create a fixup (which later becomes a
- relocation) that will allow the linker to correctly compute the
- actual address difference. We have to use a fixed line advance for
- this as we cannot (easily) relocate leb128 encoded values. */
- int saved_finalize_syms = finalize_syms;
-
- finalize_syms = 0;
- addr_diff = resolve_symbol_value (frag->fr_symbol);
- finalize_syms = saved_finalize_syms;
- }
- else
- addr_diff = resolve_symbol_value (frag->fr_symbol);
+ /* If linker relaxation is enabled then the distance between the two
+ symbols in the frag->fr_symbol expression might change. Hence we
+ cannot rely upon the value computed by resolve_symbol_value.
+ Instead we leave the expression unfinalized and allow
+ emit_fixed_inc_line_addr to create a fixup (which later becomes a
+ relocation) that will allow the linker to correctly compute the
+ actual address difference. We have to use a fixed line advance for
+ this as we cannot (easily) relocate leb128 encoded values. */
+ int saved_finalize_syms = finalize_syms;
+ finalize_syms = 0;
+ addr_diff = resolve_symbol_value (frag->fr_symbol);
+ finalize_syms = saved_finalize_syms;
/* fr_var carries the max_chars that we created the fragment with.
fr_subtype carries the current expected length. We must, of
course, have allocated enough memory earlier. */
gas_assert (frag->fr_var >= (int) frag->fr_subtype);
- if (DWARF2_USE_FIXED_ADVANCE_PC)
+ if (DWARF2_USE_FIXED_ADVANCE_PC_FRAG (frag))
emit_fixed_inc_line_addr (frag->fr_offset, addr_diff, frag,
frag->fr_literal + frag->fr_fix,
frag->fr_subtype);
@@ -2110,7 +2110,8 @@ process_entries (segT seg, struct line_entry *e)
out_set_addr (lab);
out_inc_line_addr (line_delta, 0);
}
- else if (frag == last_frag && ! DWARF2_USE_FIXED_ADVANCE_PC)
+ else if (frag == last_frag
+ && ! DWARF2_USE_FIXED_ADVANCE_PC (last_lab, lab))
out_inc_line_addr (line_delta, frag_ofs - last_frag_ofs);
else
relax_inc_line_addr (line_delta, lab, last_lab);
@@ -2127,7 +2128,7 @@ process_entries (segT seg, struct line_entry *e)
/* Emit a DW_LNE_end_sequence for the end of the section. */
frag = last_frag_for_seg (seg);
frag_ofs = get_frag_fix (frag, seg);
- if (frag == last_frag && ! DWARF2_USE_FIXED_ADVANCE_PC)
+ if (frag == last_frag && ! DWARF2_USE_FIXED_ADVANCE_PC (last_lab, lab))
out_inc_line_addr (INT_MAX, frag_ofs - last_frag_ofs);
else
{
diff --git a/gas/testsuite/gas/elf/dwarf-5-irp.d b/gas/testsuite/gas/elf/dwarf-5-irp.d
index a4f01355db3..781b2a32aaa 100644
--- a/gas/testsuite/gas/elf/dwarf-5-irp.d
+++ b/gas/testsuite/gas/elf/dwarf-5-irp.d
@@ -5,8 +5,7 @@
# The bfin target does not allow .subsection with an equated symbol as operand.
# The d30v target emits sufficiently different debug info, apparently also covering padding it inserts.
# The riscv targets do not support the subtraction of symbols.
-# The loongarch targets do not support the subtraction of symbols.
-#xfail: am33*-* bfin-* cr16-* crx-* d30v-* ft32-* loongarch*-* mn10*-* msp430-* nds32*-* riscv*-* rl78-*
+#xfail: am33*-* bfin-* cr16-* crx-* d30v-* ft32-* mn10*-* msp430-* nds32*-* riscv*-* rl78-*
Raw dump of debug contents .*
#...
diff --git a/gas/testsuite/gas/elf/dwarf-5-loc0.d b/gas/testsuite/gas/elf/dwarf-5-loc0.d
index 9338271c0eb..9439d103b1f 100644
--- a/gas/testsuite/gas/elf/dwarf-5-loc0.d
+++ b/gas/testsuite/gas/elf/dwarf-5-loc0.d
@@ -3,8 +3,7 @@
#name: DWARF5 .loc 0
# The am33 cr16 crx ft32 mn10 msp430 nds32 and rl78 targets do not evaluate the subtraction of symbols at assembly time.
# The riscv targets do not support the subtraction of symbols.
-# The loongarch targets do not support the subtraction of symbols.
-#xfail: am3*-* cr16-* crx-* ft32*-* loongarch*-* mn10*-* msp430-* nds32*-* riscv*-* rl78-*
+#xfail: am3*-* cr16-* crx-* ft32*-* mn10*-* msp430-* nds32*-* riscv*-* rl78-*
Contents of the \.debug_line section:
diff --git a/gas/testsuite/gas/elf/dwarf-5-macro-include.d b/gas/testsuite/gas/elf/dwarf-5-macro-include.d
index c39425aa8c9..32ea6386992 100644
--- a/gas/testsuite/gas/elf/dwarf-5-macro-include.d
+++ b/gas/testsuite/gas/elf/dwarf-5-macro-include.d
@@ -4,7 +4,7 @@
# The am33 cr16 crx ft32 mn10* msp430 nds32* and rl78 targets do not evaluate the subtraction of symbols at assembly time.
# The d30v target emits sufficiently different debug info, apparently also covering padding it inserts.
# The riscv targets do not support the subtraction of symbols.
-#xfail: am33*-* cr16-* crx-* d30v-* ft32-* loongarch*-* mn10*-* msp430-* nds32*-* riscv*-* rl78-*
+#xfail: am33*-* cr16-* crx-* d30v-* ft32-* mn10*-* msp430-* nds32*-* riscv*-* rl78-*
Raw dump of debug contents .*
#...
diff --git a/gas/testsuite/gas/elf/dwarf-5-macro.d b/gas/testsuite/gas/elf/dwarf-5-macro.d
index b2613bd1c16..794e17a575e 100644
--- a/gas/testsuite/gas/elf/dwarf-5-macro.d
+++ b/gas/testsuite/gas/elf/dwarf-5-macro.d
@@ -4,7 +4,7 @@
# The am33 cr16 crx ft32 mn10* msp430 nds32* and rl78 targets do not evaluate the subtraction of symbols at assembly time.
# The d30v target emits sufficiently different debug info, apparently also covering padding it inserts.
# The riscv targets do not support the subtraction of symbols.
-#xfail: am33*-* cr16-* crx-* d30v-* ft32-* loongarch*-* mn10*-* msp430-* nds32*-* riscv*-* rl78-*
+#xfail: am33*-* cr16-* crx-* d30v-* ft32-* mn10*-* msp430-* nds32*-* riscv*-* rl78-*
Raw dump of debug contents .*
#...
diff --git a/gas/testsuite/gas/elf/dwarf2-11.d b/gas/testsuite/gas/elf/dwarf2-11.d
index 44f5cd18ec6..2c30e55c695 100644
--- a/gas/testsuite/gas/elf/dwarf2-11.d
+++ b/gas/testsuite/gas/elf/dwarf2-11.d
@@ -3,8 +3,7 @@
#name: DWARF2 11
# The am33 cr16 crx ft32 mn10 msp430 nds32 and rl78 targets do not evaluate the subtraction of symbols at assembly time.
# The riscv targets do not support the subtraction of symbols.
-# The loongarch targets do not support the subtraction of symbols.
-#xfail: am3*-* cr16-* crx-* ft32*-* loongarch*-* mn10*-* msp430-* nds32*-* riscv*-* rl78-*
+#xfail: am3*-* cr16-* crx-* ft32*-* mn10*-* msp430-* nds32*-* riscv*-* rl78-*
Contents of the \.debug_line section:
diff --git a/gas/testsuite/gas/elf/dwarf2-15.d b/gas/testsuite/gas/elf/dwarf2-15.d
index 3ec9f2785a7..939c61598cb 100644
--- a/gas/testsuite/gas/elf/dwarf2-15.d
+++ b/gas/testsuite/gas/elf/dwarf2-15.d
@@ -3,8 +3,7 @@
#name: DWARF2 15
# The am33 cr16 crx ft32 mn10 msp430 nds32 and rl78 targets do not evaluate the subtraction of symbols at assembly time.
# The riscv targets do not support the subtraction of symbols.
-# The loongarch targets do not support the subtraction of symbols.
-#xfail: am3*-* cr16-* crx-* ft32*-* loongarch*-* mn10*-* msp430-* nds32*-* riscv*-* rl78-*
+#xfail: am3*-* cr16-* crx-* ft32*-* mn10*-* msp430-* nds32*-* riscv*-* rl78-*
Hex dump of section '\.rodata':
0x00000000 01 *.*
diff --git a/gas/testsuite/gas/elf/dwarf2-16.d b/gas/testsuite/gas/elf/dwarf2-16.d
index 32b57763137..8e35d493619 100644
--- a/gas/testsuite/gas/elf/dwarf2-16.d
+++ b/gas/testsuite/gas/elf/dwarf2-16.d
@@ -4,8 +4,7 @@
# The am33 cr16 crx ft32 mn10 msp430 nds32 and rl78 targets do not evaluate the subtraction of symbols at assembly time.
# The mep target tries to relay code sections which breaks symbolic view computations.
# The riscv targets do not support the subtraction of symbols.
-# The loongarch targets do not support the subtraction of symbols.
-#xfail: am3*-* cr16-* crx-* ft32*-* mep-* loongarch*-* mn10*-* msp430-* nds32*-* riscv*-* rl78-*
+#xfail: am3*-* cr16-* crx-* ft32*-* mep-* mn10*-* msp430-* nds32*-* riscv*-* rl78-*
Hex dump of section '\.rodata':
0x00000000 01 *.*
diff --git a/gas/testsuite/gas/elf/dwarf2-17.d b/gas/testsuite/gas/elf/dwarf2-17.d
index 4c2f2e3999e..881477cf95b 100644
--- a/gas/testsuite/gas/elf/dwarf2-17.d
+++ b/gas/testsuite/gas/elf/dwarf2-17.d
@@ -4,8 +4,7 @@
# The am33 cr16 crx ft32 mn10 msp430 nds32 and rl78 targets do not evaluate the subtraction of symbols at assembly time.
# The mep target tries to relay code sections which breaks symbolic view computations.
# The riscv targets do not support the subtraction of symbols.
-# The loongarch targets do not support the subtraction of symbols.
-#xfail: am3*-* cr16-* crx-* ft32*-* loongarch*-* mep-* mn10*-* msp430-* nds32*-* riscv*-* rl78-*
+#xfail: am3*-* cr16-* crx-* ft32*-* mep-* mn10*-* msp430-* nds32*-* riscv*-* rl78-*
Hex dump of section '\.rodata':
0x00000000 00 *.*
diff --git a/gas/testsuite/gas/elf/dwarf2-18.d b/gas/testsuite/gas/elf/dwarf2-18.d
index 18157c634a5..fbaebaa9019 100644
--- a/gas/testsuite/gas/elf/dwarf2-18.d
+++ b/gas/testsuite/gas/elf/dwarf2-18.d
@@ -3,8 +3,7 @@
#name: DWARF2 18
# The am33 cr16 crx ft32 mn10 msp430 nds32 and rl78 targets do not evaluate the subtraction of symbols at assembly time.
# The riscv targets do not support the subtraction of symbols.
-# The loongarch targets do not support the subtraction of symbols.
-#xfail: am3*-* cr16-* crx-* ft32*-* loongarch*-* mn10*-* msp430-* nds32*-* riscv*-* rl78-*
+#xfail: am3*-* cr16-* crx-* ft32*-* mn10*-* msp430-* nds32*-* riscv*-* rl78-*
Hex dump of section '\.rodata':
0x00000000 0100 *.*
diff --git a/gas/testsuite/gas/elf/dwarf2-19.d b/gas/testsuite/gas/elf/dwarf2-19.d
index 133294affe7..55d0caf4cb1 100644
--- a/gas/testsuite/gas/elf/dwarf2-19.d
+++ b/gas/testsuite/gas/elf/dwarf2-19.d
@@ -4,8 +4,7 @@
# The am33 cr16 crx ft32 mn10 msp430 nds32 and rl78 targets do not evaluate the subtraction of symbols at assembly time.
# The mep targets turns some view computations into complex relocations.
# The riscv targets do not support the subtraction of symbols.
-# The loongarch targets do not support the subtraction of symbols.
-#xfail: am3*-* cr16-* crx-* ft32*-* mep-* loongarch*-* mn10*-* msp430-* nds32*-* riscv*-* rl78-*
+#xfail: am3*-* cr16-* crx-* ft32*-* mep-* mn10*-* msp430-* nds32*-* riscv*-* rl78-*
Hex dump of section '\.rodata':
0x00000000 01000102 *.*
diff --git a/gas/testsuite/gas/elf/dwarf2-5.d b/gas/testsuite/gas/elf/dwarf2-5.d
index 1dd65732c50..bf1eeb5bbfd 100644
--- a/gas/testsuite/gas/elf/dwarf2-5.d
+++ b/gas/testsuite/gas/elf/dwarf2-5.d
@@ -4,8 +4,7 @@
# The am33 cr16 crx ft32 mn10 msp430 nds32 and rl78 targets do not evaluate the subtraction of symbols at assembly time.
# The mep target tries to relay code sections which breaks symbolic view computations.
# The riscv targets do not support the subtraction of symbols.
-# The loongarch targets do not support the subtraction of symbols.
-#xfail: am3*-* cr16-* crx-* ft32*-* loongarch*-* mep-* mn10*-* msp430-* nds32*-* riscv*-* rl78-*
+#xfail: am3*-* cr16-* crx-* ft32*-* mep-* mn10*-* msp430-* nds32*-* riscv*-* rl78-*
Hex dump of section '\.rodata':
0x00000000 01010201 010203 *.*
diff --git a/gas/testsuite/gas/lns/lns.exp b/gas/testsuite/gas/lns/lns.exp
index 7a92c54a260..58c2235b628 100644
--- a/gas/testsuite/gas/lns/lns.exp
+++ b/gas/testsuite/gas/lns/lns.exp
@@ -31,7 +31,6 @@ if { ![istarget s390*-*-*] } {
|| [istarget cr16-*-*]
|| [istarget crx-*-*]
|| [istarget ft32*-*]
- || [istarget loongarch*-*-*]
|| [istarget mn10*-*-*]
|| [istarget msp430-*-*]
|| [istarget nds32*-*-*]
diff --git a/gas/testsuite/gas/loongarch/relax-debug-line-opcode-norelax.d b/gas/testsuite/gas/loongarch/relax-debug-line-opcode-norelax.d
new file mode 100644
index 00000000000..c8be41feb82
--- /dev/null
+++ b/gas/testsuite/gas/loongarch/relax-debug-line-opcode-norelax.d
@@ -0,0 +1,10 @@
+#source: relax-debug-line-opcode.s
+#as: -mno-relax
+#readelf: -W -wl
+
+#...
+.* Special opcode 62: advance Address by 4 to 0x4 and Line by 1 to 11
+.* Special opcode 118: advance Address by 8 to 0xc and Line by 1 to 12
+.* Special opcode 62: advance Address by 4 to 0x10 and Line by 1 to 13
+.* Special opcode 118: advance Address by 8 to 0x18 and Line by 1 to 14
+#pass
diff --git a/gas/testsuite/gas/loongarch/relax-debug-line-opcode.d b/gas/testsuite/gas/loongarch/relax-debug-line-opcode.d
new file mode 100644
index 00000000000..9c707d97747
--- /dev/null
+++ b/gas/testsuite/gas/loongarch/relax-debug-line-opcode.d
@@ -0,0 +1,25 @@
+#source: relax-debug-line-opcode.s
+#as: -mrelax
+#readelf: -r -wl -W
+
+#...
+Relocation section '\.rela\.debug_line' at offset .* contains 7 entries:
+#...
+.*R_LARCH_ADD16[ ]+[0-9]+.*
+.*R_LARCH_SUB16[ ]+[0-9]+.*
+.*R_LARCH_ADD16[ ]+[0-9]+.*
+.*R_LARCH_SUB16[ ]+[0-9]+.*
+#...
+Raw dump of debug contents of section \.debug_line:
+#...
+.* Special opcode 62: advance Address by 4 to 0x4 and Line by 1 to 11
+.* Advance Line by 1 to 12
+.* Advance PC by fixed size amount [0-9]+ to 0x[0-9a-f]+
+.* Copy .*
+.* Special opcode 62: advance Address by 4 to 0x10 and Line by 1 to 13
+.* Advance Line by 1 to 14
+.* Advance PC by fixed size amount [0-9]+ to 0x[0-9a-f]+
+.* Copy .*
+.* Advance PC by [0-9]+ to 0x[0-9a-f]+
+.* Extended opcode 1: End of Sequence
+#pass
diff --git a/gas/testsuite/gas/loongarch/relax-debug-line-opcode.s b/gas/testsuite/gas/loongarch/relax-debug-line-opcode.s
new file mode 100644
index 00000000000..276a823373c
--- /dev/null
+++ b/gas/testsuite/gas/loongarch/relax-debug-line-opcode.s
@@ -0,0 +1,15 @@
+ # Test DWARF line encoding around linker-relaxable instructions.
+ .file 0 "test"
+ .text
+ .loc 0 10 0
+ nop # special opcode
+ .loc 0 11 0
+ call36 func # -mrelax: DW_LNS_fixed_advance_pc; -mno-relax: special opcode.
+ .loc 0 12 0
+ nop # special opcode
+ .loc 0 13 0
+ call36 func # -mrelax: DW_LNS_fixed_advance_pc; -mno-relax: special opcode.
+ .loc 0 14 0
+ nop # Advance PC
+
+.section .debug_line, "", @progbits
--
2.34.1
More information about the Binutils
mailing list