Index: uspace/lib/c/arch/mips32/include/elf_linux.h
===================================================================
--- uspace/lib/c/arch/mips32/include/elf_linux.h	(revision 3fab7708d12a7ee79f1c34527d99e5447a5386b1)
+++ uspace/lib/c/arch/mips32/include/elf_linux.h	(revision e8067c07fd644b9c4affaed2cb238f5eb8b76859)
@@ -30,5 +30,5 @@
  * @{
  */
-/** @file
+/** @file Definitions needed to write core files in Linux-ELF format.
  */
 
@@ -39,13 +39,92 @@
 #include <sys/types.h>
 
+/** Linux kernel struct pt_regs structure.
+ *
+ * We need this to save register state to a core file in Linux format
+ * (readable by GDB configured for Linux target).
+ */
 typedef struct {
-	/* TODO */
-	uint32_t pad[16];
+	uint32_t pad0[6];
+
+	uint32_t r0;
+	uint32_t r1;
+	uint32_t r2;
+	uint32_t r3;
+	uint32_t r4;
+	uint32_t r5;
+	uint32_t r6;
+	uint32_t r7;
+	uint32_t r8;
+	uint32_t r9;
+	uint32_t r10;
+	uint32_t r11;
+	uint32_t r12;
+	uint32_t r13;
+	uint32_t r14;
+	uint32_t r15;
+	uint32_t r16;
+	uint32_t r17;
+	uint32_t r18;
+	uint32_t r19;
+	uint32_t r20;
+	uint32_t r21;
+	uint32_t r22;
+	uint32_t r23;
+	uint32_t r24;
+	uint32_t r25;
+	uint32_t r26;
+	uint32_t r27;
+	uint32_t r28;
+	uint32_t r29;
+	uint32_t r30;
+	uint32_t r31;
+
+	uint32_t cp0_status;
+	uint32_t hi;
+	uint32_t lo;
+	uint32_t cp0_badvaddr;
+	uint32_t cp0_cause;
+	uint32_t cp0_epc;
 } elf_regs_t;
 
+/** Convert istate_t to elf_regs_t. */
 static inline void istate_to_elf_regs(istate_t *istate, elf_regs_t *elf_regs)
 {
-	/* TODO */
-	(void) istate; (void) elf_regs;
+	elf_regs->r1 = istate->at;
+	elf_regs->r2 = istate->v0;
+	elf_regs->r3 = istate->v1;
+	elf_regs->r4 = istate->a0;
+	elf_regs->r5 = istate->a1;
+	elf_regs->r6 = istate->a2;
+	elf_regs->r7 = istate->a3;
+	elf_regs->r8 = istate->t0;
+	elf_regs->r9 = istate->t1;
+	elf_regs->r10 = istate->t2;
+	elf_regs->r11 = istate->t3;
+	elf_regs->r12 = istate->t4;
+	elf_regs->r13 = istate->t5;
+	elf_regs->r14 = istate->t6;
+	elf_regs->r15 = istate->t7;
+	elf_regs->r16 = istate->s0;
+	elf_regs->r17 = istate->s1;
+	elf_regs->r18 = istate->s2;
+	elf_regs->r19 = istate->s3;
+	elf_regs->r20 = istate->s4;
+	elf_regs->r21 = istate->s5;
+	elf_regs->r22 = istate->s6;
+	elf_regs->r23 = istate->s7;
+	elf_regs->r24 = istate->t8;
+	elf_regs->r25 = istate->t9;
+	elf_regs->r26 = istate->kt0;
+	elf_regs->r27 = istate->kt1;
+	elf_regs->r28 = istate->gp;
+	elf_regs->r29 = istate->sp;
+	elf_regs->r30 = istate->s8;
+	elf_regs->r31 = istate->ra;
+
+	elf_regs->cp0_status = istate->status;
+	elf_regs->hi = istate->hi;
+	elf_regs->lo = istate->lo;
+	elf_regs->cp0_epc = istate->epc;
 }