1 files changed, 69 insertions, 0 deletions
diff --git a/kexec/arch/ppc/kexec-elf-rel-ppc.c b/kexec/arch/ppc/kexec-elf-rel-ppc.c
new file mode 100644
index 0000000..1acbd86
--- /dev/null
+++ b/kexec/arch/ppc/kexec-elf-rel-ppc.c
@@ -0,0 +1,69 @@
+#include <stdio.h>
+#include <elf.h>
+#include "../../kexec.h"
+#include "../../kexec-elf.h"
+
+int machine_verify_elf_rel(struct mem_ehdr *ehdr)
+{
+	if (ehdr->ei_data != ELFDATA2MSB) {
+		return 0;
+	}
+	if (ehdr->ei_class != ELFCLASS32) {
+		return 0;
+	}
+	if (ehdr->e_machine != EM_PPC) {
+		return 0;
+	}
+	return 1;
+}
+
+void machine_apply_elf_rel(struct mem_ehdr *UNUSED(ehdr),
+	struct mem_sym *UNUSED(sym), unsigned long r_type, void *location,
+	unsigned long address, unsigned long value)
+{
+	switch(r_type) {
+	case R_PPC_ADDR32:
+		/* Simply set it */
+		*(uint32_t *)location = value;
+		break;
+		
+	case R_PPC_ADDR16_LO:
+		/* Low half of the symbol */
+		*(uint16_t *)location = value;
+		break;
+		
+	case R_PPC_ADDR16_HI:
+		*(uint16_t *)location = (value>>16) & 0xffff;
+		break;
+
+	case R_PPC_ADDR16_HA:
+		/* Sign-adjusted lower 16 bits: PPC ELF ABI says:
+		   (((x >> 16) + ((x & 0x8000) ? 1 : 0))) & 0xFFFF.
+		   This is the same, only sane.
+		*/
+		*(uint16_t *)location = (value + 0x8000) >> 16;
+		break;
+		
+	case R_PPC_REL24:
+		if ((int)(value - address) < -0x02000000
+			|| (int)(value - address) >= 0x02000000)
+		{
+			die("Symbol more than 16MiB away");
+		}
+		/* Only replace bits 2 through 26 */
+		*(uint32_t *)location
+			= (*(uint32_t *)location & ~0x03fffffc)
+			| ((value - address)
+				& 0x03fffffc);
+		break;
+		
+	case R_PPC_REL32:
+		/* 32-bit relative jump. */
+		*(uint32_t *)location = value - address;
+		break;
+	default:
+		die("Unknown rela relocation: %lu\n", r_type);
+		break;
+	}
+	return;
+}