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--- a/linux-user/host/ppc64/hostdep.h
+++ b/linux-user/host/ppc64/hostdep.h
@@ -25,7 +25,11 @@
static inline void rewind_if_in_safe_syscall(void *puc)
{
ucontext_t *uc = puc;
+#if defined(__GLIBC__) || defined(__UCLIBC__)
unsigned long *pcreg = &uc->uc_mcontext.gp_regs[PT_NIP];
+#else // Musl
+ unsigned long *pcreg = &uc->uc_mcontext.gp_regs[32];
+#endif
if (*pcreg > (uintptr_t)safe_syscall_start
&& *pcreg < (uintptr_t)safe_syscall_end) {
--- a/user-exec.c
+++ a/user-exec.c
@@ -228,6 +228,7 @@
*/
#ifdef linux
/* All Registers access - only for local access */
+#if defined(__GLIBC__) || defined(__UCLIBC__)
#define REG_sig(reg_name, context) \
((context)->uc_mcontext.regs->reg_name)
/* Gpr Registers access */
@@ -245,15 +246,42 @@
/* Condition register */
#define CR_sig(context) REG_sig(ccr, context)
+#else // Musl
+#define REG_sig(reg_num, context) \
+ ((context)->uc_mcontext.gp_regs[reg_num])
+/* Gpr Registers access */
+#define GPR_sig(reg_num, context) REG_sig(gpr[reg_num], context)
+/* Program counter */
+#define IAR_sig(context) REG_sig(32, context)
+/* Machine State Register (Supervisor) */
+#define MSR_sig(context) REG_sig(33, context)
+/* Count register */
+#define CTR_sig(context) REG_sig(35, context)
+/* User's integer exception register */
+#define XER_sig(context) REG_sig(37, context)
+/* Link register */
+#define LR_sig(context) REG_sig(36, context)
+/* Condition register */
+#define CR_sig(context) REG_sig(38, context)
+#endif
+
+
/* Float Registers access */
#define FLOAT_sig(reg_num, context) \
(((double *)((char *)((context)->uc_mcontext.regs + 48 * 4)))[reg_num])
#define FPSCR_sig(context) \
(*(int *)((char *)((context)->uc_mcontext.regs + (48 + 32 * 2) * 4)))
/* Exception Registers access */
+#if defined(__GLIBC__) || defined(__UCLIBC__)
#define DAR_sig(context) REG_sig(dar, context)
#define DSISR_sig(context) REG_sig(dsisr, context)
#define TRAP_sig(context) REG_sig(trap, context)
+#else // Musl
+#define DAR_sig(context) REG_sig(41, context)
+#define DSISR_sig(context) REG_sig(42, context)
+#define TRAP_sig(context) REG_sig(40, context)
+#endif
+
#endif /* linux */
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
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