[PATCH] S/390: Add CFI for mcount call sequences
Ilya Leoshkevich
iii@linux.ibm.com
Tue Jul 17 10:48:00 GMT 2018
Fixes unwind for mcount.
2018-07-17 Ilya Leoshkevich <iii@linux.ibm.com>
* config/s390/s390.c (s390_function_profiler):
Generate CFI.
---
gcc/config/s390/s390.c | 19 ++++++++++++++++++-
1 file changed, 18 insertions(+), 1 deletion(-)
diff --git a/gcc/config/s390/s390.c b/gcc/config/s390/s390.c
index ba18cb1c39a..3627f41eb05 100644
--- a/gcc/config/s390/s390.c
+++ b/gcc/config/s390/s390.c
@@ -13153,7 +13153,7 @@ output_asm_nops (const char *user, int hw)
void
s390_function_profiler (FILE *file, int labelno)
{
- rtx op[7];
+ rtx op[8];
char label[128];
ASM_GENERATE_INTERNAL_LABEL (label, "LP", labelno);
@@ -13163,6 +13163,7 @@ s390_function_profiler (FILE *file, int labelno)
op[0] = gen_rtx_REG (Pmode, RETURN_REGNUM);
op[1] = gen_rtx_REG (Pmode, STACK_POINTER_REGNUM);
op[1] = gen_rtx_MEM (Pmode, plus_constant (Pmode, op[1], UNITS_PER_LONG));
+ op[7] = GEN_INT (UNITS_PER_LONG);
op[2] = gen_rtx_REG (Pmode, 1);
op[3] = gen_rtx_SYMBOL_REF (Pmode, label);
@@ -13196,9 +13197,13 @@ s390_function_profiler (FILE *file, int labelno)
else
{
output_asm_insn ("stg\t%0,%1", op);
+ if (flag_dwarf2_cfi_asm)
+ output_asm_insn (".cfi_rel_offset\t%0,%7", op);
output_asm_insn ("larl\t%2,%3", op);
output_asm_insn ("brasl\t%0,%4", op);
output_asm_insn ("lg\t%0,%1", op);
+ if (flag_dwarf2_cfi_asm)
+ output_asm_insn (".cfi_restore\t%0", op);
}
}
else if (TARGET_CPU_ZARCH)
@@ -13209,9 +13214,13 @@ s390_function_profiler (FILE *file, int labelno)
else
{
output_asm_insn ("st\t%0,%1", op);
+ if (flag_dwarf2_cfi_asm)
+ output_asm_insn (".cfi_rel_offset\t%0,%7", op);
output_asm_insn ("larl\t%2,%3", op);
output_asm_insn ("brasl\t%0,%4", op);
output_asm_insn ("l\t%0,%1", op);
+ if (flag_dwarf2_cfi_asm)
+ output_asm_insn (".cfi_restore\t%0", op);
}
}
else if (!flag_pic)
@@ -13225,6 +13234,8 @@ s390_function_profiler (FILE *file, int labelno)
else
{
output_asm_insn ("st\t%0,%1", op);
+ if (flag_dwarf2_cfi_asm)
+ output_asm_insn (".cfi_rel_offset\t%0,%7", op);
output_asm_insn ("bras\t%2,%l6", op);
output_asm_insn (".long\t%4", op);
output_asm_insn (".long\t%3", op);
@@ -13234,6 +13245,8 @@ s390_function_profiler (FILE *file, int labelno)
output_asm_insn ("l\t%2,4(%2)", op);
output_asm_insn ("basr\t%0,%0", op);
output_asm_insn ("l\t%0,%1", op);
+ if (flag_dwarf2_cfi_asm)
+ output_asm_insn (".cfi_restore\t%0", op);
}
}
else
@@ -13248,6 +13261,8 @@ s390_function_profiler (FILE *file, int labelno)
else
{
output_asm_insn ("st\t%0,%1", op);
+ if (flag_dwarf2_cfi_asm)
+ output_asm_insn (".cfi_rel_offset\t%0,%7", op);
output_asm_insn ("bras\t%2,%l6", op);
targetm.asm_out.internal_label (file, "L",
CODE_LABEL_NUMBER (op[5]));
@@ -13260,6 +13275,8 @@ s390_function_profiler (FILE *file, int labelno)
output_asm_insn ("a\t%2,4(%2)", op);
output_asm_insn ("basr\t%0,%0", op);
output_asm_insn ("l\t%0,%1", op);
+ if (flag_dwarf2_cfi_asm)
+ output_asm_insn (".cfi_restore\t%0", op);
}
}
--
2.17.1
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