diff --git a/linux-user/aarch64/syscall.h b/linux-user/aarch64/syscall.h
index 18f44a8..d1f4823 100644
--- a/linux-user/aarch64/syscall.h
+++ b/linux-user/aarch64/syscall.h
@@ -8,3 +8,4 @@ struct target_pt_regs {
 #define UNAME_MACHINE "aarch64"
 #define UNAME_MINIMUM_RELEASE "3.8.0"
 #define TARGET_CLONE_BACKWARDS
+#define TARGET_MINSIGSTKSZ       2048
diff --git a/linux-user/alpha/syscall.h b/linux-user/alpha/syscall.h
index ed13d9a..3adedeb 100644
--- a/linux-user/alpha/syscall.h
+++ b/linux-user/alpha/syscall.h
@@ -252,3 +252,4 @@ struct target_pt_regs {
 #define TARGET_UAC_NOPRINT		1
 #define TARGET_UAC_NOFIX		2
 #define TARGET_UAC_SIGBUS		4
+#define TARGET_MINSIGSTKSZ              4096
diff --git a/linux-user/arm/syscall.h b/linux-user/arm/syscall.h
index e0d2cc3..cdadb0c 100644
--- a/linux-user/arm/syscall.h
+++ b/linux-user/arm/syscall.h
@@ -44,3 +44,5 @@ struct target_pt_regs {
 #define UNAME_MINIMUM_RELEASE "2.6.32"
 
 #define TARGET_CLONE_BACKWARDS
+
+#define TARGET_MINSIGSTKSZ 2048
diff --git a/linux-user/cris/syscall.h b/linux-user/cris/syscall.h
index f5783c0..a75bcc4 100644
--- a/linux-user/cris/syscall.h
+++ b/linux-user/cris/syscall.h
@@ -39,5 +39,6 @@ struct target_pt_regs {
 };
 
 #define TARGET_CLONE_BACKWARDS2
+#define TARGET_MINSIGSTKSZ 2048
 
 #endif
diff --git a/linux-user/i386/syscall.h b/linux-user/i386/syscall.h
index 9bfc1ad..acf6856 100644
--- a/linux-user/i386/syscall.h
+++ b/linux-user/i386/syscall.h
@@ -147,3 +147,4 @@ struct target_vm86plus_struct {
 #define UNAME_MINIMUM_RELEASE "2.6.32"
 
 #define TARGET_CLONE_BACKWARDS
+#define TARGET_MINSIGSTKSZ 2048
diff --git a/linux-user/m68k/syscall.h b/linux-user/m68k/syscall.h
index 889eaf7..f8553f8 100644
--- a/linux-user/m68k/syscall.h
+++ b/linux-user/m68k/syscall.h
@@ -18,4 +18,6 @@ struct target_pt_regs {
 #define UNAME_MACHINE "m68k"
 #define UNAME_MINIMUM_RELEASE "2.6.32"
 
+#define TARGET_MINSIGSTKSZ 2048
+
 void do_m68k_simcall(CPUM68KState *, int);
diff --git a/linux-user/microblaze/syscall.h b/linux-user/microblaze/syscall.h
index 5b5f6b4..2a5e160 100644
--- a/linux-user/microblaze/syscall.h
+++ b/linux-user/microblaze/syscall.h
@@ -49,5 +49,6 @@ struct target_pt_regs {
 };
 
 #define TARGET_CLONE_BACKWARDS
+#define TARGET_MINSIGSTKSZ      2048
 
 #endif
diff --git a/linux-user/mips/syscall.h b/linux-user/mips/syscall.h
index 5bc5696..0b4662c 100644
--- a/linux-user/mips/syscall.h
+++ b/linux-user/mips/syscall.h
@@ -228,3 +228,4 @@ struct target_pt_regs {
 #define UNAME_MINIMUM_RELEASE "2.6.32"
 
 #define TARGET_CLONE_BACKWARDS
+#define TARGET_MINSIGSTKSZ 2048
diff --git a/linux-user/mips64/syscall.h b/linux-user/mips64/syscall.h
index a7f5a58..39b8bed 100644
--- a/linux-user/mips64/syscall.h
+++ b/linux-user/mips64/syscall.h
@@ -225,3 +225,4 @@ struct target_pt_regs {
 #define UNAME_MINIMUM_RELEASE "2.6.32"
 
 #define TARGET_CLONE_BACKWARDS
+#define TARGET_MINSIGSTKSZ      2048
diff --git a/linux-user/openrisc/syscall.h b/linux-user/openrisc/syscall.h
index c3b36da..e5e6180 100644
--- a/linux-user/openrisc/syscall.h
+++ b/linux-user/openrisc/syscall.h
@@ -23,3 +23,5 @@ struct target_pt_regs {
 
 #define UNAME_MACHINE "openrisc"
 #define UNAME_MINIMUM_RELEASE "2.6.32"
+
+#define TARGET_MINSIGSTKSZ 2048
diff --git a/linux-user/ppc/syscall.h b/linux-user/ppc/syscall.h
index db92bbe..5311cc6 100644
--- a/linux-user/ppc/syscall.h
+++ b/linux-user/ppc/syscall.h
@@ -69,3 +69,5 @@ struct target_revectored_struct {
 #define UNAME_MINIMUM_RELEASE "2.6.32"
 
 #define TARGET_CLONE_BACKWARDS
+
+#define TARGET_MINSIGSTKSZ 2048
diff --git a/linux-user/s390x/syscall.h b/linux-user/s390x/syscall.h
index aaad512..b11a3b2 100644
--- a/linux-user/s390x/syscall.h
+++ b/linux-user/s390x/syscall.h
@@ -24,3 +24,4 @@ struct target_pt_regs {
 #define UNAME_MINIMUM_RELEASE "2.6.32"
 
 #define TARGET_CLONE_BACKWARDS2
+#define TARGET_MINSIGSTKSZ        2048
diff --git a/linux-user/sh4/syscall.h b/linux-user/sh4/syscall.h
index ccd2216..285ecf3 100644
--- a/linux-user/sh4/syscall.h
+++ b/linux-user/sh4/syscall.h
@@ -11,3 +11,5 @@ struct target_pt_regs {
 
 #define UNAME_MACHINE "sh4"
 #define UNAME_MINIMUM_RELEASE "2.6.32"
+
+#define TARGET_MINSIGSTKSZ 2048
diff --git a/linux-user/signal.c b/linux-user/signal.c
index 1141054..26929c5 100644
--- a/linux-user/signal.c
+++ b/linux-user/signal.c
@@ -617,6 +617,15 @@ abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp)
     {
         struct target_sigaltstack *uss;
         struct target_sigaltstack ss;
+        size_t minstacksize = TARGET_MINSIGSTKSZ;
+
+#if defined(TARGET_PPC64)
+        /* ELF V2 for PPC64 has a 4K minimum stack size for signal handlers */
+        struct image_info *image = ((TaskState *)thread_cpu->opaque)->info;
+        if (get_ppc64_abi(image) > 1) {
+            minstacksize = 4096;
+        }
+#endif
 
 	ret = -TARGET_EFAULT;
         if (!lock_user_struct(VERIFY_READ, uss, uss_addr, 1)) {
@@ -642,8 +651,9 @@ abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp)
             ss.ss_sp = 0;
 	} else {
             ret = -TARGET_ENOMEM;
-            if (ss.ss_size < MINSIGSTKSZ)
+            if (ss.ss_size < minstacksize) {
                 goto out;
+            }
 	}
 
         target_sigaltstack_used.ss_sp = ss.ss_sp;
diff --git a/linux-user/sparc/syscall.h b/linux-user/sparc/syscall.h
index 9549ea0..ae40744 100644
--- a/linux-user/sparc/syscall.h
+++ b/linux-user/sparc/syscall.h
@@ -15,3 +15,4 @@ struct target_pt_regs {
  * and copy_thread().
  */
 #define TARGET_CLONE_BACKWARDS
+#define TARGET_MINSIGSTKSZ      4096
diff --git a/linux-user/sparc64/syscall.h b/linux-user/sparc64/syscall.h
index 82b1680..816a00f 100644
--- a/linux-user/sparc64/syscall.h
+++ b/linux-user/sparc64/syscall.h
@@ -16,3 +16,4 @@ struct target_pt_regs {
  * and copy_thread().
  */
 #define TARGET_CLONE_BACKWARDS
+#define TARGET_MINSIGSTKSZ      4096
diff --git a/linux-user/unicore32/syscall.h b/linux-user/unicore32/syscall.h
index f7e5525..3ed6237 100644
--- a/linux-user/unicore32/syscall.h
+++ b/linux-user/unicore32/syscall.h
@@ -53,4 +53,6 @@ struct target_pt_regs {
 #define UNAME_MACHINE "UniCore-II"
 #define UNAME_MINIMUM_RELEASE "2.6.32"
 
+#define TARGET_MINSIGSTKSZ 2048
+
 #endif /* __UC32_SYSCALL_H__ */
diff --git a/linux-user/x86_64/syscall.h b/linux-user/x86_64/syscall.h
index e03b5a0..5828b91 100644
--- a/linux-user/x86_64/syscall.h
+++ b/linux-user/x86_64/syscall.h
@@ -97,3 +97,4 @@ struct target_msqid64_ds {
 #define TARGET_ARCH_SET_FS 0x1002
 #define TARGET_ARCH_GET_FS 0x1003
 #define TARGET_ARCH_GET_GS 0x1004
+#define TARGET_MINSIGSTKSZ 2048
