microblaze port

based on initial work by rdp, with heavy modifications. some features
including threads are untested because qemu app-level emulation seems
to be broken and I do not have a proper system image for testing.

1 files changed, 41 insertions, 0 deletions

diff --git a/arch/microblaze/reloc.h b/arch/microblaze/reloc.h
new file mode 100644
index 00000000..9f04f125
--- /dev/null
+++ b/arch/microblaze/reloc.h
@@ -0,0 +1,41 @@
+#include <string.h>
+#include <elf.h>
+
+#define ETC_LDSO_PATH "/etc/ld-musl-microblaze.path"
+
+#define IS_COPY(x) ((x)==R_MICROBLAZE_COPY)
+#define IS_PLT(x) ((x)==R_MICROBLAZE_JUMP_SLOT)
+
+static inline void do_single_reloc(size_t *reloc_addr, int type, size_t sym_val, size_t sym_size, unsigned char *base_addr, size_t addend)
+{
+	switch(type) {
+	case R_MICROBLAZE_32:
+	case R_MICROBLAZE_GLOB_DAT:
+	case R_MICROBLAZE_JUMP_SLOT:
+		*reloc_addr = sym_val + addend;
+		break;
+	case R_MICROBLAZE_REL:
+		*reloc_addr = (size_t)base_addr + addend;
+		break;
+	case R_MICROBLAZE_COPY:
+		memcpy(reloc_addr, (void *)sym_val, sym_size);
+		break;
+	}
+}
+
+#include "syscall.h"
+void __reloc_self(int c, size_t *a, size_t *dynv)
+{
+	char dot = '.', ex = 'x';
+	char *base;
+	size_t t[20], n;
+	for (a+=c+1; *a; a++);
+	for (a++; *a; a+=2) if (*a<20) t[*a] = a[1];
+	base = (char *)t[AT_BASE];
+	if (!base) base = (char *)(t[AT_PHDR] & -4096);
+	for (a=dynv; *a; a+=2) if (*a<20) t[*a] = a[1];
+	n = t[DT_RELASZ];
+	for (a=(void *)(base+t[DT_RELA]); n; a+=3, n-=12)
+		if (a[1]%256 == R_MICROBLAZE_REL)
+			*(size_t *)(base+a[0]) = (size_t)base + a[2];
+}