fix: make crt-stack position-independent

gemesa · Dec 20, 2024 · 8676348 · 8676348
1 parent 0f444a8
commit 8676348
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Showing 2 changed files with 7 additions and 7 deletions.
diff --git a/Makefile b/Makefile
@@ -91,7 +91,7 @@ $(BUILDDIR)/linux/x64/crt-hello: lab/linux/asm-hive/x64/crt-hello.s
 	gcc $< -fPIE -pie -g -o $@
 
 $(BUILDDIR)/linux/x64/crt-stack: lab/linux/asm-hive/x64/crt-stack.s
-	gcc $< -g -o $@
+	gcc $< -fPIE -pie -g -o $@
 
 $(BUILDDIR)/linux/x64/nocrt-hello: lab/linux/asm-hive/x64/nocrt-hello.s
 	as $< -g -o $(BUILDDIR)/linux/x64/nocrt-hello.o

diff --git a/lab/linux/asm-hive/x64/crt-stack.s b/lab/linux/asm-hive/x64/crt-stack.s
@@ -60,20 +60,20 @@ main_:
 	mov  $10, %edi
 	mov  $11, %esi
 	call sum
-	mov  $format_string, %edi
+	lea  format_string(%rip), %rdi
 	mov  %eax, %esi
 	call printf
 	mov  $10, %edi
 	mov  $11, %esi
 	call mul
-	mov  $format_string, %edi
+	lea  format_string(%rip), %rdi
 	mov  %eax, %esi
 	call printf
 	xor  %eax, %eax
 	mov  $10, %edi
 	mov  $11, %esi
 	call calc
-	mov  $format_string, %edi
+	lea  format_string(%rip), %rdi
 	mov  %eax, %esi
 	call printf
 	pop  %rbp
@@ -132,20 +132,20 @@ main:
 	mov  edi, 10
 	mov  esi, 11
 	call sum
-	mov  edi, offset format_string
+	lea  rdi, [rip + format_string]
 	mov  esi, eax
 	call printf
 	mov  edi, 10
 	mov  esi, 11
 	call mul
-	mov  edi, offset format_string
+	lea  rdi, [rip + format_string]
 	mov  esi, eax
 	call printf
 	xor  eax, eax
 	mov  edi, 10
 	mov  esi, 11
 	call calc
-	mov  edi, offset format_string
+	lea  rdi, [rip + format_string]
 	mov  esi, eax
 	call printf
 	pop  rbp