diff --git a/study/patch/ptrace/Makefile b/study/patch/ptrace/Makefile
index 62a95ab..7a6cf2b 100644
--- a/study/patch/ptrace/Makefile
+++ b/study/patch/ptrace/Makefile
@@ -10,12 +10,12 @@ INSTALL_HOME_DIR=home/chengjian
 
 ifeq ($(ARCH), arm64)
 	CROSS_COMPILE=/opt/arm/toolschain/linaro/gcc-linaro-7.1.1-2017.08-x86_64_aarch64-linux-gnu/bin/aarch64-linux-gnu-
-	ARCH_FILE_DIR=_install_x86
-else ifeq ($(TARGET_ARCH), arm)
-	CROSS_COMPILE=arm-linux-gnueabi-
 	ARCH_FILE_DIR=_install_arm64
-else	# ifeq ($(ARCH), x86_64)
+else ifeq ($(ARCH), arm32)
+	CROSS_COMPILE=arm-linux-gnueabi-
 	ARCH_FILE_DIR=_install_arm32
+else	# ifeq ($(ARCH), x86_64)
+	ARCH_FILE_DIR=_install_x86
 endif
 
 INSTALL_BIN_DIR=$(INSTALL_ROOT_DIR)/$(ARCH_FILE_DIR)/$(INSTALL_HOME_DIR)/ #$(CURRENT_BIN_DIR)
diff --git a/study/patch/ptrace/a b/study/patch/ptrace/a
deleted file mode 100755
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diff --git a/study/patch/ptrace/ptrace_bug/a b/study/patch/ptrace/ptrace_bug/a
index b5f56db..6285b58 100755
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diff --git a/study/patch/ptrace/ptrace_bug/ptrace_peekuser b/study/patch/ptrace/ptrace_bug/ptrace_peekuser
index 42d0566..82f42cd 100755
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diff --git a/study/patch/ptrace/ptrace_bug/ptrace_singlestep b/study/patch/ptrace/ptrace_bug/ptrace_singlestep
index d34cf26..14e7320 100755
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diff --git a/study/patch/ptrace/ptrace_bug/ptrace_singlestep2 b/study/patch/ptrace/ptrace_bug/ptrace_singlestep2
index 135ae69..8efebcf 100755
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diff --git a/study/patch/ptrace/ptrace_peekuser b/study/patch/ptrace/ptrace_peekuser
deleted file mode 100755
index 5289a2f..0000000
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diff --git a/study/patch/ptrace/ptrace_singlestep b/study/patch/ptrace/ptrace_singlestep
deleted file mode 100755
index 44a877a..0000000
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diff --git a/study/patch/ptrace/ptrace_singlestep2 b/study/patch/ptrace/ptrace_singlestep2
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index e151f38..0000000
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