svn commit: r355047 - head/libexec/rtld-elf/powerpc

Brandon Bergren bdragon at FreeBSD.org
Sun Nov 24 06:43:04 UTC 2019


Author: bdragon
Date: Sun Nov 24 06:43:03 2019
New Revision: 355047
URL: https://svnweb.freebsd.org/changeset/base/355047

Log:
  [PowerPC] Fix stack padding issue on ppc32.
  
  Four bytes of padding are needed in the regular powerpc case to bring the
  stack frame size up to a multiple of 16 bytes to meet ABI requirements.
  
  Fixes odd hangs I was encountering during testing.

Modified:
  head/libexec/rtld-elf/powerpc/rtld_start.S

Modified: head/libexec/rtld-elf/powerpc/rtld_start.S
==============================================================================
--- head/libexec/rtld-elf/powerpc/rtld_start.S	Sun Nov 24 05:37:28 2019	(r355046)
+++ head/libexec/rtld-elf/powerpc/rtld_start.S	Sun Nov 24 06:43:03 2019	(r355047)
@@ -111,7 +111,7 @@ _ENTRY(.rtld_start)
 /* stack space for 30 GPRs + lr/cr */
 #define	NREGS		30
 #define	GPRWIDTH	4
-#define	FUDGE		0
+#define	FUDGE		4
 #endif
 /* Stack frame needs the 12-byte ABI frame plus fudge factor. */
 #define	STACK_SIZE	(NREGS * GPRWIDTH + 4 * 2 + 12 + FUDGE)


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