community/openjdk7: fix build on PPC when musl is used instead of glibc

Musl on Power does not define regs member as a pt_regs pointer type,
hence it's necessary to use member gp_regs instead.

1 files changed, 169 insertions, 0 deletions

diff --git a/community/openjdk7/icedtea-hotspot-musl-ppc.patch b/community/openjdk7/icedtea-hotspot-musl-ppc.patch
new file mode 100644
index 00000000000..161abf349a7
--- /dev/null
+++ b/community/openjdk7/icedtea-hotspot-musl-ppc.patch
@@ -0,0 +1,169 @@
+--- openjdk.orig/hotspot/src/cpu/ppc/vm/macroAssembler_ppc.cpp
++++ openjdk/hotspot/src/cpu/ppc/vm/macroAssembler_ppc.cpp
+@@ -1211,7 +1211,11 @@
+   // the safepoing polling page.
+   ucontext_t* uc = (ucontext_t*) ucontext;
+   // Set polling address.
++#if defined(__GLIBC__) || defined(__UCLIBC__)
+   address addr = (address)uc->uc_mcontext.regs->gpr[ra] + (ssize_t)ds;
++#else // Musl
++  address addr = (address)uc->uc_mcontext.gp_regs[ra] + (ssize_t)ds;
++#endif
+   if (polling_address_ptr != NULL) {
+     *polling_address_ptr = addr;
+   }
+@@ -1232,15 +1236,24 @@
+     int rb = inv_rb_field(instruction);
+ 
+     // look up content of ra and rb in ucontext
++#if defined(__GLIBC__) || defined(__UCLIBC__)
+     address ra_val=(address)uc->uc_mcontext.regs->gpr[ra];
+     long rb_val=(long)uc->uc_mcontext.regs->gpr[rb];
++#else // Musl
++    address ra_val=(address)uc->uc_mcontext.gp_regs[ra];
++    long rb_val=(long)uc->uc_mcontext.gp_regs[rb];
++#endif
+     return os::is_memory_serialize_page(thread, ra_val+rb_val);
+   } else if (is_stw(instruction) || is_stwu(instruction)) {
+     int ra = inv_ra_field(instruction);
+     int d1 = inv_d1_field(instruction);
+ 
+     // look up content of ra in ucontext
++#if defined(__GLIBC__) || defined(__UCLIBC__)
+     address ra_val=(address)uc->uc_mcontext.regs->gpr[ra];
++#else // Musl
++    address ra_val=(address)uc->uc_mcontext.gp_regs[ra];
++#endif
+     return os::is_memory_serialize_page(thread, ra_val+d1);
+   } else {
+     return false;
+@@ -1303,11 +1316,20 @@
+       || (is_stdu(instruction) && rs == 1)) {
+     int ds = inv_ds_field(instruction);
+     // return banged address
++#if defined(__GLIBC__) || defined(__UCLIBC__)
+     return ds+(address)uc->uc_mcontext.regs->gpr[ra];
++#else // Musl
++    return ds+(address)uc->uc_mcontext.gp_regs[ra];
++#endif
+   } else if (is_stdux(instruction) && rs == 1) {
+     int rb = inv_rb_field(instruction);
++#if defined(__GLIBC__) || defined(__UCLIBC__)
+     address sp = (address)uc->uc_mcontext.regs->gpr[1];
+     long rb_val = (long)uc->uc_mcontext.regs->gpr[rb];
++#else // Musl
++    address sp = (address)uc->uc_mcontext.gp_regs[1];
++    long rb_val = (long)uc->uc_mcontext.gp_regs[rb];
++#endif
+     return ra != 1 || rb_val >= 0 ? NULL         // not a stack bang
+                                   : sp + rb_val; // banged address
+   }
+--- openjdk.orig/hotspot/src/os_cpu/linux_ppc/vm/os_linux_ppc.cpp
++++ openjdk/hotspot/src/os_cpu/linux_ppc/vm/os_linux_ppc.cpp
+@@ -123,11 +123,19 @@
+   //   it because the volatile registers are not needed to make setcontext() work.
+   //   Hopefully it was zero'd out beforehand.
+   guarantee(uc->uc_mcontext.regs != NULL, "only use ucontext_get_pc in sigaction context");
++#if defined(__GLIBC__) || defined(__UCLIBC__)
+   return (address)uc->uc_mcontext.regs->nip;
++#else // Musl
++  return (address)uc->uc_mcontext.gp_regs[32];
++#endif
+ }
+ 
+ intptr_t* os::Linux::ucontext_get_sp(ucontext_t * uc) {
++#if defined(__GLIBC__) || defined(__UCLIBC__)
+   return (intptr_t*)uc->uc_mcontext.regs->gpr[1/*REG_SP*/];
++#else // Musl
++  return (intptr_t*)uc->uc_mcontext.gp_regs[1/*REG_SP*/];
++#endif
+ }
+ 
+ intptr_t* os::Linux::ucontext_get_fp(ucontext_t * uc) {
+@@ -226,7 +234,11 @@
+   if (uc) {
+     address const pc = os::Linux::ucontext_get_pc(uc);
+     if (pc && StubRoutines::is_safefetch_fault(pc)) {
++#if defined(__GLIBC__) || defined(__UCLIBC__)
+       uc->uc_mcontext.regs->nip = (unsigned long)StubRoutines::continuation_for_safefetch_fault(pc);
++#else // Musl
++      uc->uc_mcontext.gp_regs[32] = (unsigned long)StubRoutines::continuation_for_safefetch_fault(pc);
++#endif
+       return true;
+     }
+   }
+@@ -370,7 +382,11 @@
+           // continue at the next instruction after the faulting read. Returning
+           // garbage from this read is ok.
+           thread->set_pending_unsafe_access_error();
++#if defined(__GLIBC__) || defined(__UCLIBC__)
+           uc->uc_mcontext.regs->nip = ((unsigned long)pc) + 4;
++#else // Musl
++          uc->uc_mcontext.gp_regs[32] = ((unsigned long)pc) + 4;
++#endif
+           return true;
+         }
+       }
+@@ -389,7 +405,11 @@
+         // continue at the next instruction after the faulting read. Returning
+         // garbage from this read is ok.
+         thread->set_pending_unsafe_access_error();
++#if defined(__GLIBC__) || defined(__UCLIBC__)
+         uc->uc_mcontext.regs->nip = ((unsigned long)pc) + 4;
++#else // Musl
++        uc->uc_mcontext.gp_regs[32] = ((unsigned long)pc) + 4;
++#endif
+         return true;
+       }
+     }
+@@ -412,7 +432,11 @@
+   if (stub != NULL) {
+     // Save all thread context in case we need to restore it.
+     if (thread != NULL) thread->set_saved_exception_pc(pc);
++#if defined(__GLIBC__) || defined(__UCLIBC__)
+     uc->uc_mcontext.regs->nip = (unsigned long)stub;
++#else // Musl
++    uc->uc_mcontext.gp_regs[32] = (unsigned long)stub;
++#endif
+     return true;
+   }
+ 
+@@ -570,6 +594,7 @@
+   ucontext_t* uc = (ucontext_t*)context;
+ 
+   st->print_cr("Registers:");
++#if defined(__GLIBC__) || defined(__UCLIBC__)
+   st->print("pc =" INTPTR_FORMAT "  ", uc->uc_mcontext.regs->nip);
+   st->print("lr =" INTPTR_FORMAT "  ", uc->uc_mcontext.regs->link);
+   st->print("ctr=" INTPTR_FORMAT "  ", uc->uc_mcontext.regs->ctr);
+@@ -578,8 +603,18 @@
+     st->print("r%-2d=" INTPTR_FORMAT "  ", i, uc->uc_mcontext.regs->gpr[i]);
+     if (i % 3 == 2) st->cr();
+   }
++#else // Musl
++  st->print("pc =" INTPTR_FORMAT "  ", uc->uc_mcontext.gp_regs[32]);
++  st->print("lr =" INTPTR_FORMAT "  ", uc->uc_mcontext.gp_regs[36]);
++  st->print("ctr=" INTPTR_FORMAT "  ", uc->uc_mcontext.gp_regs[35]);
+   st->cr();
++  for (int i = 0; i < 32; i++) {
++    st->print("r%-2d=" INTPTR_FORMAT "  ", i, uc->uc_mcontext.gp_regs[i]);
++    if (i % 3 == 2) st->cr();
++  }
++#endif
+   st->cr();
++  st->cr();
+ 
+   intptr_t *sp = (intptr_t *)os::Linux::ucontext_get_sp(uc);
+   st->print_cr("Top of Stack: (sp=" PTR_FORMAT ")", sp);
+@@ -606,7 +641,11 @@
+   // this is only for the "general purpose" registers
+   for (int i = 0; i < 32; i++) {
+     st->print("r%-2d=", i);
++#if defined(__GLIBC__) || defined(__UCLIBC__)
+     print_location(st, uc->uc_mcontext.regs->gpr[i]);
++#else // Musl
++    print_location(st, uc->uc_mcontext.gp_regs[i]);
++#endif
+   }
+   st->cr();
+ }