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[PATCH] Support .cfi_personality and .cfi_lsda directives

Jakub Jelinek jakub@redhat.com
Thu Nov 2 14:56:00 GMT 2006 
On Wed, Nov 01, 2006 at 09:11:10AM -0800, H. J. Lu wrote:
> On Wed, Nov 01, 2006 at 05:55:49PM +0100, Jakub Jelinek wrote:
> > This is the second part in my attempt to change GCC to emit .eh_frame unwind
> > info using .cfi_* directives.
> > 
> > The gas generated .eh_frame never has personality nor LSDA, while for C++,
> > Java or __attribute__((cleanup ())) in C we often need them.
> > 
> > This patch adds two new directives, .cfi_personality and .cfi_lsda,
> > which set the personality routine and LSDA of the current FDE (well,
> > personality routine is a CIE thingie, but we generate CIEs on the fly
> > for the FDEs).
> 
> Testcases?

Here it is:

2006-11-02  Jakub Jelinek  <jakub@redhat.com>

	* gas/cfi/cfi-common-6.d: New test.
	* gas/cfi/cfi-common-6.s: New.
	* gas/cfi/cfi.exp: Add cfi-common-6 test.

--- gas/testsuite/gas/cfi/cfi-common-6.d.jj	2006-11-02 15:05:03.000000000 +0100
+++ gas/testsuite/gas/cfi/cfi-common-6.d	2006-11-02 15:08:39.000000000 +0100
@@ -0,0 +1,73 @@
+#readelf: -wf
+#name: CFI common 6
+The section .eh_frame contains:
+
+00000000 00000018 00000000 CIE
+  Version:               1
+  Augmentation:          "zPLR"
+  Code alignment factor: .*
+  Data alignment factor: .*
+  Return address column: .*
+  Augmentation data:     03 .. .. .. .. 0c 1b
+
+  DW_CFA_nop
+  DW_CFA_nop
+  DW_CFA_nop
+
+0000001c 00000018 00000020 FDE cie=00000000 pc=00000000..00000004
+  Augmentation data:     (00 00 00 00 de ad be ef|ef be ad de 00 00 00 00)
+
+  DW_CFA_nop
+  DW_CFA_nop
+  DW_CFA_nop
+
+00000038 00000010 00000000 CIE
+  Version:               1
+  Augmentation:          "zLR"
+  Code alignment factor: .*
+  Data alignment factor: .*
+  Return address column: .*
+  Augmentation data:     0c 1b
+
+  DW_CFA_nop
+
+0000004c 00000018 00000018 FDE cie=00000038 pc=00000004..00000008
+  Augmentation data:     (00 00 00 00 de ad be ef|ef be ad de 00 00 00 00)
+
+  DW_CFA_nop
+  DW_CFA_nop
+  DW_CFA_nop
+
+00000068 00000018 0000006c FDE cie=00000000 pc=00000008..0000000c
+  Augmentation data:     (00 00 00 00 be ef de ad|ad de ef be 00 00 00 00)
+
+  DW_CFA_nop
+  DW_CFA_nop
+  DW_CFA_nop
+
+00000084 00000018 00000000 CIE
+  Version:               1
+  Augmentation:          "zPLR"
+  Code alignment factor: .*
+  Data alignment factor: .*
+  Return address column: .*
+  Augmentation data:     1b .. .. .. .. 1b 1b
+
+  DW_CFA_nop
+  DW_CFA_nop
+  DW_CFA_nop
+
+000000a0 00000014 00000020 FDE cie=00000084 pc=0000000c..00000010
+  Augmentation data:     .. .. .. ..
+
+  DW_CFA_nop
+  DW_CFA_nop
+  DW_CFA_nop
+
+000000b8 00000014 00000038 FDE cie=00000084 pc=00000010..00000014
+  Augmentation data:     .. .. .. ..
+
+  DW_CFA_nop
+  DW_CFA_nop
+  DW_CFA_nop
+
--- gas/testsuite/gas/cfi/cfi-common-6.s.jj	2006-11-02 12:08:09.000000000 +0100
+++ gas/testsuite/gas/cfi/cfi-common-6.s	2006-11-02 12:08:49.000000000 +0100
@@ -0,0 +1,40 @@
+	.text
+	.cfi_startproc simple
+	.cfi_personality 3, my_personality_v0
+	.cfi_lsda 12, 0xdeadbeef
+	.long 0
+	.cfi_endproc
+
+	.cfi_startproc simple
+	.cfi_personality 3, my_personality_v0
+	.cfi_lsda 12, 0xdeadbeef
+	.cfi_personality 0xff
+	.long 0
+	.cfi_endproc
+
+	.cfi_startproc simple
+	.cfi_personality 3, my_personality_v0
+	.cfi_lsda 12, 0xbeefdead
+	.long 0
+	.cfi_endproc
+
+	.cfi_startproc simple
+	.cfi_personality (0x10 | 11), my_personality_v1
+	.cfi_lsda 27, 1f
+	.long 0
+	.cfi_endproc
+
+	.cfi_startproc simple
+	.cfi_personality (0x10 | 11), my_personality_v1
+	.cfi_lsda 27, 2f
+	.long 0
+	.cfi_endproc
+
+my_personality_v0:
+	.long 0
+my_personality_v1:
+	.long 0
+1:
+	.long 0
+2:
+	.long 0
--- gas/testsuite/gas/cfi/cfi.exp.jj	2006-10-31 12:16:09.000000000 +0100
+++ gas/testsuite/gas/cfi/cfi.exp	2006-11-02 15:46:52.000000000 +0100
@@ -73,3 +73,4 @@ run_dump_test "cfi-common-2"
 run_dump_test "cfi-common-3"
 run_dump_test "cfi-common-4"
 run_dump_test "cfi-common-5"
+run_dump_test "cfi-common-6"


	Jakub
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