diff options
Diffstat (limited to 'xpcom/reflect/xptcall/md/unix/xptcinvoke_linux_s390x.cpp')
| -rw-r--r-- | xpcom/reflect/xptcall/md/unix/xptcinvoke_linux_s390x.cpp | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/xpcom/reflect/xptcall/md/unix/xptcinvoke_linux_s390x.cpp b/xpcom/reflect/xptcall/md/unix/xptcinvoke_linux_s390x.cpp new file mode 100644 index 000000000..86478a850 --- /dev/null +++ b/xpcom/reflect/xptcall/md/unix/xptcinvoke_linux_s390x.cpp @@ -0,0 +1,190 @@ +/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +/* Platform specific code to invoke XPCOM methods on native objects */ + +#include "xptcprivate.h" + + +static uint32_t +invoke_count_words(uint32_t paramCount, nsXPTCVariant* s) +{ + uint32_t overflow = 0, gpr = 1 /*this*/, fpr = 0; + for(uint32_t i = 0; i < paramCount; i++, s++) + { + if(s->IsPtrData()) + { + if (gpr < 5) gpr++; else overflow++; + continue; + } + switch(s->type) + { + case nsXPTType::T_I8 : + case nsXPTType::T_I16 : + case nsXPTType::T_I32 : + case nsXPTType::T_I64 : + if (gpr < 5) gpr++; else overflow++; + break; + case nsXPTType::T_U8 : + case nsXPTType::T_U16 : + case nsXPTType::T_U32 : + case nsXPTType::T_U64 : + if (gpr < 5) gpr++; else overflow++; + break; + case nsXPTType::T_FLOAT : + case nsXPTType::T_DOUBLE : + if (fpr < 4) fpr++; else overflow++; + break; + case nsXPTType::T_BOOL : + case nsXPTType::T_CHAR : + case nsXPTType::T_WCHAR : + if (gpr < 5) gpr++; else overflow++; + break; + default: + // all the others are plain pointer types + if (gpr < 5) gpr++; else overflow++; + break; + } + } + /* Round up number of overflow words to ensure stack + stays aligned to 8 bytes. */ + return (overflow + 1) & ~1; +} + +static void +invoke_copy_to_stack(uint32_t paramCount, nsXPTCVariant* s, uint64_t* d_ov, uint32_t overflow) +{ + uint64_t *d_gpr = d_ov + overflow; + uint64_t *d_fpr = (uint64_t *)(d_gpr + 4); + uint32_t gpr = 1 /*this*/, fpr = 0; + + for(uint32_t i = 0; i < paramCount; i++, s++) + { + if(s->IsPtrData()) + { + if (gpr < 5) + *((void**)d_gpr) = s->ptr, d_gpr++, gpr++; + else + *((void**)d_ov ) = s->ptr, d_ov++; + continue; + } + switch(s->type) + { + case nsXPTType::T_I8 : + if (gpr < 5) + *((int64_t*) d_gpr) = s->val.i8, d_gpr++, gpr++; + else + *((int64_t*) d_ov ) = s->val.i8, d_ov++; + break; + case nsXPTType::T_I16 : + if (gpr < 5) + *((int64_t*) d_gpr) = s->val.i16, d_gpr++, gpr++; + else + *((int64_t*) d_ov ) = s->val.i16, d_ov++; + break; + case nsXPTType::T_I32 : + if (gpr < 5) + *((int64_t*) d_gpr) = s->val.i32, d_gpr++, gpr++; + else + *((int64_t*) d_ov ) = s->val.i32, d_ov++; + break; + case nsXPTType::T_I64 : + if (gpr < 5) + *((int64_t*) d_gpr) = s->val.i64, d_gpr++, gpr++; + else + *((int64_t*) d_ov ) = s->val.i64, d_ov++; + break; + case nsXPTType::T_U8 : + if (gpr < 5) + *((uint64_t*) d_gpr) = s->val.u8, d_gpr++, gpr++; + else + *((uint64_t*) d_ov ) = s->val.u8, d_ov++; + break; + case nsXPTType::T_U16 : + if (gpr < 5) + *((uint64_t*)d_gpr) = s->val.u16, d_gpr++, gpr++; + else + *((uint64_t*)d_ov ) = s->val.u16, d_ov++; + break; + case nsXPTType::T_U32 : + if (gpr < 5) + *((uint64_t*)d_gpr) = s->val.u32, d_gpr++, gpr++; + else + *((uint64_t*)d_ov ) = s->val.u32, d_ov++; + break; + case nsXPTType::T_U64 : + if (gpr < 5) + *((uint64_t*)d_gpr) = s->val.u64, d_gpr++, gpr++; + else + *((uint64_t*)d_ov ) = s->val.u64, d_ov++; + break; + case nsXPTType::T_FLOAT : + if (fpr < 4) + *((float*) d_fpr) = s->val.f, d_fpr++, fpr++; + else + *(((float*) d_ov )+1) = s->val.f, d_ov++; + break; + case nsXPTType::T_DOUBLE : + if (fpr < 4) + *((double*) d_fpr) = s->val.d, d_fpr++, fpr++; + else + *((double*) d_ov ) = s->val.d, d_ov++; + break; + case nsXPTType::T_BOOL : + if (gpr < 5) + *((uint64_t*)d_gpr) = s->val.b, d_gpr++, gpr++; + else + *((uint64_t*)d_ov ) = s->val.b, d_ov++; + break; + case nsXPTType::T_CHAR : + if (gpr < 5) + *((uint64_t*)d_gpr) = s->val.c, d_gpr++, gpr++; + else + *((uint64_t*)d_ov ) = s->val.c, d_ov++; + break; + case nsXPTType::T_WCHAR : + if (gpr < 5) + *((uint64_t*)d_gpr) = s->val.wc, d_gpr++, gpr++; + else + *((uint64_t*)d_ov ) = s->val.wc, d_ov++; + break; + default: + // all the others are plain pointer types + if (gpr < 5) + *((void**) d_gpr) = s->val.p, d_gpr++, gpr++; + else + *((void**) d_ov ) = s->val.p, d_ov++; + break; + } + } +} + +typedef nsresult (*vtable_func)(nsISupports *, uint64_t, uint64_t, uint64_t, uint64_t, double, double, double, double); + +// Avoid AddressSanitizer instrumentation for the next function because it +// depends on __builtin_alloca behavior and alignment that cannot be relied on +// once the function is compiled with a version of ASan that has dynamic-alloca +// instrumentation enabled. + +MOZ_ASAN_BLACKLIST +EXPORT_XPCOM_API(nsresult) +NS_InvokeByIndex(nsISupports* that, uint32_t methodIndex, + uint32_t paramCount, nsXPTCVariant* params) +{ + vtable_func *vtable = *reinterpret_cast<vtable_func **>(that); + vtable_func method = vtable[methodIndex]; + uint64_t overflow = invoke_count_words (paramCount, params); + uint64_t *stack_space = reinterpret_cast<uint64_t *>(__builtin_alloca((overflow + 8 /* 4 64-bits gpr + 4 64-bits fpr */) * 8)); + uint64_t result; + + invoke_copy_to_stack(paramCount, params, stack_space, overflow); + + uint64_t *d_gpr = stack_space + overflow; + double *d_fpr = reinterpret_cast<double *>(d_gpr + 4); + + return method(that, d_gpr[0], d_gpr[1], d_gpr[2], d_gpr[3], d_fpr[0], d_fpr[1], d_fpr[2], d_fpr[3]); +} + |