[PATCH v3 03/13] sandbox: Rename getopt sections

[Andrew Scull]

Rename the sections used for defining sandbox command line options so
that they don't start with a '.'. ELF says that sections starting with a
'.' are reserved for system use, but the sandbox runs as a normal user
process so should be using user sections instead.

Clang's ASAN adds redzones to non-user sections and the extra padding
meant that the list of options was being corrupted. Naming the sections
as user sections avoids this issue as clang handles them as we intended.

Signed-off-by: Andrew Scull <ascull at google.com>
---
 arch/sandbox/cpu/u-boot-spl.lds     | 6 +++---
 arch/sandbox/cpu/u-boot.lds         | 6 +++---
 arch/sandbox/include/asm/getopt.h   | 2 +-
 arch/sandbox/include/asm/sections.h | 4 ++--
 4 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/arch/sandbox/cpu/u-boot-spl.lds b/arch/sandbox/cpu/u-boot-spl.lds
index 206e265e74..6b300bcc93 100644
--- a/arch/sandbox/cpu/u-boot-spl.lds
+++ b/arch/sandbox/cpu/u-boot-spl.lds
@@ -22,9 +22,9 @@ SECTIONS
 	}
 
 	_u_boot_sandbox_getopt : {
-		*(.u_boot_sandbox_getopt_start)
-		KEEP(*(.u_boot_sandbox_getopt))
-		*(.u_boot_sandbox_getopt_end)
+		*(_u_boot_sandbox_getopt_start)
+		KEEP(*(_u_boot_sandbox_getopt))
+		*(_u_boot_sandbox_getopt_end)
 	}
 }
 
diff --git a/arch/sandbox/cpu/u-boot.lds b/arch/sandbox/cpu/u-boot.lds
index d2cb12fc29..1f89a3329e 100644
--- a/arch/sandbox/cpu/u-boot.lds
+++ b/arch/sandbox/cpu/u-boot.lds
@@ -14,9 +14,9 @@ SECTIONS
 	}
 
 	_u_boot_sandbox_getopt : {
-		*(.u_boot_sandbox_getopt_start)
-		*(.u_boot_sandbox_getopt)
-		*(.u_boot_sandbox_getopt_end)
+		*(_u_boot_sandbox_getopt_start)
+		*(_u_boot_sandbox_getopt)
+		*(_u_boot_sandbox_getopt_end)
 	}
 
 	efi_runtime_start : {
diff --git a/arch/sandbox/include/asm/getopt.h b/arch/sandbox/include/asm/getopt.h
index d2145ad6e2..df30572d6c 100644
--- a/arch/sandbox/include/asm/getopt.h
+++ b/arch/sandbox/include/asm/getopt.h
@@ -44,7 +44,7 @@ struct sandbox_cmdline_option {
 		.callback = sandbox_cmdline_cb_##f, \
 	}; \
 	/* Ppointer to the struct in a special section for the linker script */ \
-	static __used __section(".u_boot_sandbox_getopt") \
+	static __used __section("_u_boot_sandbox_getopt") \
 		struct sandbox_cmdline_option \
 			*sandbox_cmdline_option_##f##_ptr = \
 			&sandbox_cmdline_option_##f
diff --git a/arch/sandbox/include/asm/sections.h b/arch/sandbox/include/asm/sections.h
index f4351ae7db..88837bb35c 100644
--- a/arch/sandbox/include/asm/sections.h
+++ b/arch/sandbox/include/asm/sections.h
@@ -17,7 +17,7 @@ static inline struct sandbox_cmdline_option **
 __u_boot_sandbox_option_start(void)
 {
 	static char start[0] __aligned(4) __attribute__((unused))
-		__section(".u_boot_sandbox_getopt_start");
+		__section("_u_boot_sandbox_getopt_start");
 
 	return (struct sandbox_cmdline_option **)&start;
 }
@@ -26,7 +26,7 @@ static inline struct sandbox_cmdline_option **
 __u_boot_sandbox_option_end(void)
 {
 	static char end[0] __aligned(4) __attribute__((unused))
-		__section(".u_boot_sandbox_getopt_end");
+		__section("_u_boot_sandbox_getopt_end");
 
 	return (struct sandbox_cmdline_option **)&end;
 }
-- 
2.36.1.124.g0e6072fb45-goog