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API: Use stack pointer as API signature search hint in the glue layer.

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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>
This commit is contained in:
Rafal Jaworowski
2009-01-23 13:27:15 +01:00
committed by Wolfgang Denk
parent 86b4bafdfa
commit b84d7d8f1e
3 changed files with 23 additions and 10 deletions
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8
api_examples/glue.h
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@@ -30,12 +30,12 @@
#ifndef _API_GLUE_H_
#define _API_GLUE_H_
#define API_SEARCH_START (255 * 1024 * 1024) /* start at 1MB below top RAM */
#define API_SEARCH_END (256 * 1024 * 1024 - 1) /* ...and search to the end */
#define API_SEARCH_LEN (3 * 1024 * 1024) /* 3MB search range */
extern void *syscall_ptr;
extern uint32_t search_hint;
int syscall(int, int *, ...);
void * syscall_ptr;
int api_search_sig(struct api_signature **sig);
/*