Author: mcayland Date: Sun Feb 16 17:26:34 2014 New Revision: 1265 URL: http://tracker.coreboot.org/trac/openbios/changeset/1265
Log: SPARC32: copy the a.out header beneath load-base during load
NextSTEP's bootloader for Sparc32 expects that the 32 bytes a.out header is copied just before the start address.
Since this is a compatibility hack for an implementation detail of OBP then implement the functionality within a #define AOUT_HEADER_COPY section so it can easily be removed if people really need a strictly compliant firmware.
Signed-off-by: Olivier Danet odanet@caramail.com Signed-off-by: Mark Cave-Ayland mark.cave-ayland@ilande.co.uk
Modified: trunk/openbios-devel/libopenbios/aout_load.c
Modified: trunk/openbios-devel/libopenbios/aout_load.c ============================================================================== --- trunk/openbios-devel/libopenbios/aout_load.c Sun Feb 16 17:26:31 2014 (r1264) +++ trunk/openbios-devel/libopenbios/aout_load.c Sun Feb 16 17:26:34 2014 (r1265) @@ -10,6 +10,12 @@ #define CONFIG_SPARC64_PAGE_SIZE_8KB #endif
+/* NextStep bootloader on SPARC32 expects the a.out header directly + below load-base (0x4000) */ +#ifdef CONFIG_SPARC32 +#define AOUT_HEADER_COPY +#endif + #include "libopenbios/sys_info.h" #include "libopenbios/bindings.h" #include "libopenbios/aout_load.h" @@ -143,6 +149,11 @@ debug("Loaded %lu bytes\n", size); debug("entry point is %#lx\n", start);
+#ifdef AOUT_HEADER_COPY + // Copy the a.out header just before start + memcpy((char *)(start - 0x20), &ehdr, 0x20); +#endif + // Initialise saved-program-state PUSH(addr_fixup(start)); feval("saved-program-state >sps.entry !");