From: Denys Vlasenko <dvlasenk@redhat.com>
Date: Fri, 28 Jun 2013 12:41:30 +0000 (+0200)
Subject: POWERPC: if GETREGS fails with EIO, don't try it again
X-Git-Tag: v4.9~215
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=7eb893236ca547779b597325a4a0e4b349e4c566;p=strace

POWERPC: if GETREGS fails with EIO, don't try it again

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
---

diff --git a/syscall.c b/syscall.c
index fc7cd06d..a44ac0c4 100644
--- a/syscall.c
+++ b/syscall.c
@@ -1070,9 +1070,15 @@ get_regs(pid_t pid)
 # elif defined(SPARC) || defined(SPARC64)
 	get_regs_error = ptrace(PTRACE_GETREGS, pid, (char *)&sparc_regs, 0);
 # elif defined(POWERPC)
+	static bool old_kernel = 0;
+	if (old_kernel)
+		goto old;
 	get_regs_error = ptrace(PTRACE_GETREGS, pid, NULL, (long) &ppc_regs);
-	if (get_regs_error && errno == EIO)
+	if (get_regs_error && errno == EIO) {
+		old_kernel = 1;
+ old:
 		get_regs_error = powerpc_getregs_old(pid);
+	}
 
 /* try PTRACE_GETREGSET first, fallback to PTRACE_GETREGS */
 # else