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| author | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2015-11-25 17:56:33 +0100 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2016-01-13 21:05:18 -0500 |
| commit | adc421e4cee8275cd99367b3b455ffbb5ead3990 (patch) | |
| tree | 08a51a4c9a9a6d5806d9f2c329065de3a5a7586e /common/init | |
| parent | ecc306639e83c9019a5093b77a48685ea40eedc2 (diff) | |
| download | u-boot-adc421e4cee8275cd99367b3b455ffbb5ead3990.tar.gz u-boot-adc421e4cee8275cd99367b3b455ffbb5ead3990.tar.bz2 u-boot-adc421e4cee8275cd99367b3b455ffbb5ead3990.zip | |
arm: move gd handling outside of C code
As of gcc 5.2.1 for Thumb-1, it is not possible any
more to assign gd from C code, as gd is mapped to r9,
and r9 may now be saved in the prolog sequence, and
restored in the epilog sequence, of any C functions.
Therefore arch_setup_gd(), which is supposed to set
r9, may actually have no effect, causing U-Boot to
use a bad address to access GD.
Fix this by never calling arch_setup_gd() for ARM,
and instead setting r9 in arch/arm/lib/crt0.S, to
the value returned by board_init_f_alloc_reserve().
Signed-off-by: Albert ARIBAUD <albert.u.boot@aribaud.net>
Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'common/init')
| -rw-r--r-- | common/init/board_init.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/common/init/board_init.c b/common/init/board_init.c index e649e078b9..d98648eaa6 100644 --- a/common/init/board_init.c +++ b/common/init/board_init.c @@ -21,13 +21,13 @@ DECLARE_GLOBAL_DATA_PTR; #define _USE_MEMCPY #endif -/* Unfortunately x86 can't compile this code as gd cannot be assigned */ -#ifndef CONFIG_X86 +/* Unfortunately x86 or ARM can't compile this code as gd cannot be assigned */ +#if !defined(CONFIG_X86) && !defined(CONFIG_ARM) __weak void arch_setup_gd(struct global_data *gd_ptr) { gd = gd_ptr; } -#endif /* !CONFIG_X86 */ +#endif /* !CONFIG_X86 && !CONFIG_ARM */ /* * Allocate reserved space for use as 'globals' from 'top' address and @@ -128,7 +128,7 @@ void board_init_f_init_reserve(ulong base) *ptr++ = 0; #endif /* set GD unless architecture did it already */ -#ifndef CONFIG_X86 +#if !defined(CONFIG_X86) && !defined(CONFIG_ARM) arch_setup_gd(gd_ptr); #endif /* next alloc will be higher by one GD plus 16-byte alignment */ |