[U-Boot] [RFC PATCH] rename __bss_end__ back to _end for standalone programs

Po-Yu Chuang
2011-03-28T08:43:02Z

From: Po-Yu Chuang <ratbert@faraday-tech.com>

It seems __bss_end__ is not a true convention for all toolchains,
at least not for PPC. Using _end for standalone programs might be
the simplest way to fix this problem.

One of the other choices may be writing a linker script to provide
__bss_end__ for PPC.

Signed-off-by: Po-Yu Chuang <ratbert@faraday-tech.com>
---
Hi all,

Not sure if this is the best solution, but I think this
could fix Heiko's problem.

examples/standalone/mips.lds | 2 +-
examples/standalone/sparc.lds | 2 +-
examples/standalone/stubs.c | 4 ++--
3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/examples/standalone/mips.lds b/examples/standalone/mips.lds
index 68ae217..63a1c92 100644
--- a/examples/standalone/mips.lds
+++ b/examples/standalone/mips.lds
@@ -55,5 +55,5 @@ SECTIONS
.sbss (NOLOAD) : { *(.sbss) }
.bss (NOLOAD) : { *(.bss) . = ALIGN(4); }

- __bss_end__ = .;
+ _end = .;
}
diff --git a/examples/standalone/sparc.lds b/examples/standalone/sparc.lds
index 7f060b6..9733daa 100644
--- a/examples/standalone/sparc.lds
+++ b/examples/standalone/sparc.lds
@@ -57,5 +57,5 @@ SECTIONS
}
. = ALIGN(4);
__bss_end = .;
- __bss_end__ = .;
+ _end = .;
}
diff --git a/examples/standalone/stubs.c b/examples/standalone/stubs.c
index 1379df7..2d2e709 100644
--- a/examples/standalone/stubs.c
+++ b/examples/standalone/stubs.c
@@ -187,14 +187,14 @@ void __attribute__((unused)) dummy(void)
#include <_exports.h>
}

-extern unsigned long __bss_start, __bss_end__;
+extern unsigned long __bss_start, _end;

void app_startup(char * const *argv)
{
unsigned char * cp = (unsigned char *) &__bss_start;

/* Zero out BSS */
- while (cp < (unsigned char *)&__bss_end__) {
+ while (cp < (unsigned char *)&_end) {
*cp++ = 0;
}

--
1.6.3.3