Add assember CFI directives to millicode division and remainder routines.

The millicode division and remainder routines trap division by zero.
The unwinder needs these directives to unwind divide by zero traps.

2023-04-05  John David Anglin  <danglin@gcc.gnu.org>

libgcc/ChangeLog:

	PR target/109374
	* config/pa/milli64.S (RETURN_COLUMN): Define.
	($$divI): Add CFI directives.
	($$divU): Likewise.
	($$remI): Likewise.
	($$remU): Likewise.

diff --git a/libgcc/config/pa/milli64.S b/libgcc/config/pa/milli64.S
index 2316f79..e1c84f4 100644 (file)
--- a/libgcc/config/pa/milli64.S
+++ b/libgcc/config/pa/milli64.S
@@ -105,8 +105,10 @@ sar:       .reg    %cr11   /* Shift Amount Register */
 rp:    .reg    r2      /* return pointer */
 #ifdef pa64
 mrp:   .reg    r2      /* millicode return pointer */
+#define RETURN_COLUMN  2
 #else
 mrp:   .reg    r31     /* millicode return pointer */
+#define RETURN_COLUMN  31
 #endif
 ret0:  .reg    r28     /* return value */
 ret1:  .reg    r29     /* return value (high part of double) */
@@ -313,6 +315,8 @@ RDEFINE(temp1,arg0)
        .import $$divI_15,millicode
        .export $$divI,millicode
        .export $$divoI,millicode
+       .cfi_startproc
+       .cfi_return_column RETURN_COLUMN
        .proc
        .callinfo       millicode
        .entry
@@ -484,6 +488,7 @@ LSYM(negative1)
        addo    arg0,arg1,r0    /*  trap iff dividend==0x80000000 && divisor==-1 */
        .exit
        .procend
+       .cfi_endproc
        .end
 #endif
 
@@ -543,6 +548,8 @@ RDEFINE(temp1,arg0)
        .import $$divU_12,millicode
        .import $$divU_14,millicode
        .import $$divU_15,millicode
+       .cfi_startproc
+       .cfi_return_column RETURN_COLUMN
        .proc
        .callinfo       millicode
        .entry
@@ -706,6 +713,7 @@ LSYM(big_divisor)
        addc    r0,r0,retreg
        .exit
        .procend
+       .cfi_endproc
        .end
 #endif
 
@@ -750,6 +758,8 @@ RDEFINE(retreg,ret1)
 
        SUBSPA_MILLI
        ATTR_MILLI
+       .cfi_startproc
+       .cfi_return_column RETURN_COLUMN
        .proc
        .callinfo millicode
        .entry
@@ -875,6 +885,7 @@ LSYM(finish)
        nop
        .exit
        .procend
+       .cfi_endproc
 #ifdef milliext
        .origin 0x00000200
 #endif
@@ -922,6 +933,8 @@ RDEFINE(rmndr,ret1) /*  r29 */
        SUBSPA_MILLI
        ATTR_MILLI
        .export $$remU,millicode
+       .cfi_startproc
+       .cfi_return_column RETURN_COLUMN
        .proc
        .callinfo       millicode
        .entry
@@ -1013,6 +1026,7 @@ LSYM(special_case)
        nop
        .exit
        .procend
+       .cfi_endproc
        .end
 #endif