--- a/include/libunwind-ppc32.h
+++ b/include/libunwind-ppc32.h
@@ -40,6 +40,10 @@ extern "C" {
 #include <stdint.h>
 #include <ucontext.h>
 
+#ifndef __GLIBC__
+#include <bits/reg.h>
+#endif
+
 #ifndef UNW_EMPTY_STRUCT
 #  define UNW_EMPTY_STRUCT uint8_t unused;
 #endif
@@ -81,6 +85,88 @@ typedef int64_t unw_sword_t;
 
 typedef long double unw_tdep_fpreg_t;
 
+#ifndef __GLIBC__
+
+/* We can't include asm/ptrace.h here, as it conflicts with musl's definitions */
+
+#define PT_R0	0
+#define PT_R1	1
+#define PT_R2	2
+#define PT_R3	3
+#define PT_R4	4
+#define PT_R5	5
+#define PT_R6	6
+#define PT_R7	7
+#define PT_R8	8
+#define PT_R9	9
+#define PT_R10	10
+#define PT_R11	11
+#define PT_R12	12
+#define PT_R13	13
+#define PT_R14	14
+#define PT_R15	15
+#define PT_R16	16
+#define PT_R17	17
+#define PT_R18	18
+#define PT_R19	19
+#define PT_R20	20
+#define PT_R21	21
+#define PT_R22	22
+#define PT_R23	23
+#define PT_R24	24
+#define PT_R25	25
+#define PT_R26	26
+#define PT_R27	27
+#define PT_R28	28
+#define PT_R29	29
+#define PT_R30	30
+#define PT_R31	31
+
+#define PT_NIP	32
+#define PT_MSR	33
+#define PT_ORIG_R3 34
+#define PT_CTR	35
+#define PT_LNK	36
+#define PT_XER	37
+#define PT_CCR	38
+#ifndef __powerpc64__
+#define PT_MQ	39
+#else
+#define PT_SOFTE 39
+#endif
+#define PT_TRAP	40
+#define PT_DAR	41
+#define PT_DSISR 42
+#define PT_RESULT 43
+#define PT_DSCR 44
+#define PT_REGS_COUNT 44
+
+#define PT_FPR0	48	/* each FP reg occupies 2 slots in this space */
+
+#ifndef __powerpc64__
+
+#define PT_FPR31 (PT_FPR0 + 2*31)
+#define PT_FPSCR (PT_FPR0 + 2*32 + 1)
+
+#else /* __powerpc64__ */
+
+#define PT_FPSCR (PT_FPR0 + 32)	/* each FP reg occupies 1 slot in 64-bit space */
+
+
+#define PT_VR0 82	/* each Vector reg occupies 2 slots in 64-bit */
+#define PT_VSCR (PT_VR0 + 32*2 + 1)
+#define PT_VRSAVE (PT_VR0 + 33*2)
+
+
+/*
+ * Only store first 32 VSRs here. The second 32 VSRs in VR0-31
+ */
+#define PT_VSR0 150	/* each VSR reg occupies 2 slots in 64-bit */
+#define PT_VSR31 (PT_VSR0 + 2*31)
+#endif /* __powerpc64__ */
+
+#endif /* !__GLIBC__ */
+
 typedef enum
   {
     UNW_PPC32_R0,
--- a/include/libunwind-ppc64.h
+++ b/include/libunwind-ppc64.h
@@ -40,6 +40,10 @@ extern "C" {
 #include <stdint.h>
 #include <ucontext.h>
 
+#ifndef __GLIBC__
+#include <bits/reg.h>
+#endif
+
 #ifndef UNW_EMPTY_STRUCT
 #  define UNW_EMPTY_STRUCT uint8_t unused;
 #endif
@@ -88,6 +92,88 @@ typedef struct {
     uint64_t halves[2];
 } unw_tdep_vreg_t;
 
+#ifndef __GLIBC__
+
+/* We can't include asm/ptrace.h here, as it conflicts with musl's definitions */
+
+#define PT_R0	0
+#define PT_R1	1
+#define PT_R2	2
+#define PT_R3	3
+#define PT_R4	4
+#define PT_R5	5
+#define PT_R6	6
+#define PT_R7	7
+#define PT_R8	8
+#define PT_R9	9
+#define PT_R10	10
+#define PT_R11	11
+#define PT_R12	12
+#define PT_R13	13
+#define PT_R14	14
+#define PT_R15	15
+#define PT_R16	16
+#define PT_R17	17
+#define PT_R18	18
+#define PT_R19	19
+#define PT_R20	20
+#define PT_R21	21
+#define PT_R22	22
+#define PT_R23	23
+#define PT_R24	24
+#define PT_R25	25
+#define PT_R26	26
+#define PT_R27	27
+#define PT_R28	28
+#define PT_R29	29
+#define PT_R30	30
+#define PT_R31	31
+
+#define PT_NIP	32
+#define PT_MSR	33
+#define PT_ORIG_R3 34
+#define PT_CTR	35
+#define PT_LNK	36
+#define PT_XER	37
+#define PT_CCR	38
+#ifndef __powerpc64__
+#define PT_MQ	39
+#else
+#define PT_SOFTE 39
+#endif
+#define PT_TRAP	40
+#define PT_DAR	41
+#define PT_DSISR 42
+#define PT_RESULT 43
+#define PT_DSCR 44
+#define PT_REGS_COUNT 44
+
+#define PT_FPR0	48	/* each FP reg occupies 2 slots in this space */
+
+#ifndef __powerpc64__
+
+#define PT_FPR31 (PT_FPR0 + 2*31)
+#define PT_FPSCR (PT_FPR0 + 2*32 + 1)
+
+#else /* __powerpc64__ */
+
+#define PT_FPSCR (PT_FPR0 + 32)	/* each FP reg occupies 1 slot in 64-bit space */
+
+
+#define PT_VR0 82	/* each Vector reg occupies 2 slots in 64-bit */
+#define PT_VSCR (PT_VR0 + 32*2 + 1)
+#define PT_VRSAVE (PT_VR0 + 33*2)
+
+
+/*
+ * Only store first 32 VSRs here. The second 32 VSRs in VR0-31
+ */
+#define PT_VSR0 150	/* each VSR reg occupies 2 slots in 64-bit */
+#define PT_VSR31 (PT_VSR0 + 2*31)
+#endif /* __powerpc64__ */
+
+#endif /* !__GLIBC__ */
+
 typedef enum
   {
     UNW_PPC64_R0,
--- a/src/ppc32/Ginit.c
+++ b/src/ppc32/Ginit.c
@@ -46,10 +46,15 @@ static void *
 uc_addr (ucontext_t *uc, int reg)
 {
   void *addr;
+#ifdef __GLIBC__
+  mcontext_t *mc = uc->uc_mcontext.uc_regs;
+#else
+  mcontext_t *mc = &uc->uc_mcontext;
+#endif
 
   if ((unsigned) (reg - UNW_PPC32_R0) < 32)
 #if defined(__linux__)
-    addr = &uc->uc_mcontext.uc_regs->gregs[reg - UNW_PPC32_R0];
+    addr = &mc->gregs[reg - UNW_PPC32_R0];
 #elif defined(__FreeBSD__)
     addr = &uc->uc_mcontext.mc_gpr[reg - UNW_PPC32_R0];
 #endif
@@ -58,7 +63,7 @@ uc_addr (ucontext_t *uc, int reg)
   if ( ((unsigned) (reg - UNW_PPC32_F0) < 32) &&
        ((unsigned) (reg - UNW_PPC32_F0) >= 0) )
 #if defined(__linux__)
-    addr = &uc->uc_mcontext.uc_regs->fpregs.fpregs[reg - UNW_PPC32_F0];
+    addr = &mc->fpregs.fpregs[reg - UNW_PPC32_F0];
  #elif defined(__FreeBSD__)
     addr = &uc->uc_mcontext.mc_fpreg[reg - UNW_PPC32_F0];
 #endif
@@ -85,7 +90,7 @@ uc_addr (ucontext_t *uc, int reg)
           return NULL;
         }
 #if defined(__linux__)
-      addr = &uc->uc_mcontext.uc_regs->gregs[gregs_idx];
+      addr = &mc->gregs[gregs_idx];
 #elif defined(__FreeBSD__)
       addr = &uc->uc_mcontext.mc_gpr[gregs_idx];
 #endif
--- a/src/ppc32/ucontext_i.h
+++ b/src/ppc32/ucontext_i.h
@@ -44,8 +44,13 @@ WITH THE SOFTWARE OR THE USE OR OTHER DE
 //#define MQ_IDX                36
 #define LINK_IDX        36
 
+#ifdef __GLIBC__
 #define _UC_MCONTEXT_GPR(x) ( ((void *)&dmy_ctxt.uc_mcontext.uc_regs->gregs[x] - (void *)&dmy_ctxt) )
 #define _UC_MCONTEXT_FPR(x) ( ((void *)&dmy_ctxt.uc_mcontext.uc_regs->fpregs.fpregs[x] - (void *)&dmy_ctxt) )
+#else
+#define _UC_MCONTEXT_GPR(x) ( ((void *)&dmy_ctxt.uc_mcontext.gregs[x] - (void *)&dmy_ctxt) )
+#define _UC_MCONTEXT_FPR(x) ( ((void *)&dmy_ctxt.uc_mcontext.fpregs.fpregs[x] - (void *)&dmy_ctxt) )
+#endif
 
 /* These are dummy structures used only for obtaining the offsets of the
    various structure members. */
