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| author | Rafal Jaworowski <raj@semihalf.com> | 2009-01-23 13:27:15 +0100 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2009-02-18 00:39:34 +0100 |
| commit | b84d7d8f1e1066f810866304a16a3583f88e7c98 (patch) | |
| tree | 78ce8c7adbc218545cd2d94185c54a593767fc58 /api_examples/crt0.S | |
| parent | 86b4bafdfaf669ede8fd99044abc7e27ea29b4f5 (diff) | |
| download | talos-obmc-uboot-b84d7d8f1e1066f810866304a16a3583f88e7c98.tar.gz talos-obmc-uboot-b84d7d8f1e1066f810866304a16a3583f88e7c98.zip | |
API: Use stack pointer as API signature search hint in the glue layer.
De-hardcode range in RAM we search for the API signature. Instead use the stack
pointer as a hint to narrow down the range in which the signature could reside
(it is malloc'ed on the U-Boot heap, and is hoped to remain in some proximity
from stack area). Adjust PowerPC code in API demo to the new scheme.
Signed-off-by: Rafal Czubak <rcz@semihalf.com>
Signed-off-by: Rafal Jaworowski <raj@semihalf.com>
Diffstat (limited to 'api_examples/crt0.S')
| -rw-r--r-- | api_examples/crt0.S | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/api_examples/crt0.S b/api_examples/crt0.S index 8d4f7064eb..3129a07bcb 100644 --- a/api_examples/crt0.S +++ b/api_examples/crt0.S @@ -29,6 +29,9 @@ .globl _start _start: + lis %r11, search_hint@ha + addi %r11, %r11, search_hint@l + stw %r1, 0(%r11) b main @@ -39,12 +42,15 @@ syscall: lwz %r11, 0(%r11) mtctr %r11 bctr - +#else +#error No support for this arch! +#endif .globl syscall_ptr syscall_ptr: .align 4 .long 0 -#else -#error No support for this arch! -#endif + + .globl search_hint +search_hint: + .long 0 |
