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Preserve register %a2.

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If we don't preserver the %a2 register through MacOS traps, the content
of "emile_l2_header_t* info" in second/main:start() is lost.

It seems gcc supposes this register is not modified whereas it is.

This has been detected on a powermac 7100. I don't know if this appears
because of the powermac ROM or of the gcc version (4.3.2).

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Laurent Vivier 2009-06-11 22:02:04 +02:00
parent 2d8317cb92
commit c1b482e48a
1 changed files with 1 additions and 1 deletions
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libmacos/macos/traps.h
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@ -34,7 +34,7 @@
/*
* Inside Macintosh Volume I, I-94: Register Saving Conventions */
#define UNPRESERVED_REGS "%%a0", "%%a1", "%%d1", "%%d2", "%%sp", "memory"
#define UNPRESERVED_REGS "%%a0", "%%a1", "%%a2", "%%d1", "%%d2", "%%sp", "memory"
#define _Trap(a) #a
#define Trap(a) " dc.w "_Trap(a)" /* "#a" */\n"