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bug 681602 - Implement xptcall for arm iOS. r=glandium
xptcstubs_arm mostly works on iOS but Apple's assembler is ridiculous so the inline assembly for the SharedStub and the stub methods needs judicious preprocessor use.
This commit is contained in:
Ted Mielczarek
parent
c4b7c13186
commit
01199f04c1
@ -9,8 +9,8 @@
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#include "mozilla/Compiler.h"
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#if !defined(__arm__) && !(defined(LINUX) || defined(ANDROID))
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#error "This code is for Linux ARM only. Check that it works on your system, too.\nBeware that this code is highly compiler dependent."
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#if !defined(__arm__) && !(defined(LINUX) || defined(ANDROID) || defined(XP_IOS))
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#error "This code is for Linux/iOS ARM only. Check that it works on your system, too.\nBeware that this code is highly compiler dependent."
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#endif
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#if MOZ_IS_GCC
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@ -9,6 +9,8 @@
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#include "xptcinvoke_x86_64_unix.cpp"
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#elif defined(__ppc__)
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#include "xptcinvoke_ppc_rhapsody.cpp"
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#elif defined(__arm__)
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#include "xptcinvoke_arm.cpp"
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#else
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#error unknown cpu architecture
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#endif
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@ -8,8 +8,8 @@
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#include "xptcprivate.h"
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#include "xptiprivate.h"
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#if !defined(__arm__) && !(defined(LINUX) || defined(ANDROID))
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#error "This code is for Linux ARM only. Please check if it works for you, too.\nDepends strongly on gcc behaviour."
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#if !defined(__arm__) && !(defined(LINUX) || defined(ANDROID) || defined(XP_DARWIN))
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#error "This code is for Linux/iOS ARM only. Please check if it works for you, too.\nDepends strongly on gcc behaviour."
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#endif
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/* Specify explicitly a symbol for this function, don't try to guess the c++ mangled symbol. */
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@ -22,11 +22,21 @@ ATTRIBUTE_USED;
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#define DOUBLEWORD_ALIGN(p) (p)
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#endif
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// Apple's iOS toolchain is lame and does not support .cfi directives.
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// Apple's iOS toolchain is lame.
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#ifdef __APPLE__
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#define CFI(str)
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#define GNU(str)
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#define APPLE(str) str
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#define UNDERSCORE "__"
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#else
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#define CFI(str) str
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#define GNU(str) str
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#define APPLE(str)
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#define UNDERSCORE "_"
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#endif
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#ifdef __thumb__
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#define THUMB_FUNC ".thumb_func\n"
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#else
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#define THUMB_FUNC
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#endif
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static nsresult
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@ -127,27 +137,29 @@ PrepareAndDispatch(nsXPTCStubBase* self, uint32_t methodIndex, uint32_t* args)
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*
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*/
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__asm__ ("\n"
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".text\n"
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GNU(".text\n")
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APPLE(".section __TEXT,__text\n")
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THUMB_FUNC
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".align 2\n"
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"SharedStub:\n"
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".fnstart\n"
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CFI(".cfi_startproc\n")
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GNU(".fnstart\n")
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GNU(".cfi_startproc\n")
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"stmfd sp!, {r1, r2, r3}\n"
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".save {r1, r2, r3}\n"
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CFI(".cfi_def_cfa_offset 12\n")
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CFI(".cfi_offset r3, -4\n")
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CFI(".cfi_offset r2, -8\n")
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CFI(".cfi_offset r1, -12\n")
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GNU(".save {r1, r2, r3}\n")
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GNU(".cfi_def_cfa_offset 12\n")
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GNU(".cfi_offset r3, -4\n")
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GNU(".cfi_offset r2, -8\n")
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GNU(".cfi_offset r1, -12\n")
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"mov r2, sp\n"
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"str lr, [sp, #-4]!\n"
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".save {lr}\n"
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CFI(".cfi_def_cfa_offset 16\n")
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CFI(".cfi_offset lr, -16\n")
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GNU(".save {lr}\n")
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GNU(".cfi_def_cfa_offset 16\n")
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GNU(".cfi_offset lr, -16\n")
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"mov r1, ip\n"
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"bl _PrepareAndDispatch\n"
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"ldr pc, [sp], #16\n"
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CFI(".cfi_endproc\n")
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".fnend");
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GNU(".cfi_endproc\n")
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GNU(".fnend"));
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/*
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* Create sets of stubs to call the SharedStub.
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@ -171,22 +183,26 @@ __asm__ ("\n"
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#define STUB_ENTRY(n) \
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__asm__( \
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".section \".text\"\n" \
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GNU(".section \".text\"\n") \
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APPLE(".section __TEXT,__text\n") \
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" .align 2\n" \
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" .iflt ("#n" - 10)\n" \
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" .globl _ZN14nsXPTCStubBase5Stub"#n"Ev\n" \
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" .type _ZN14nsXPTCStubBase5Stub"#n"Ev,#function\n" \
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"_ZN14nsXPTCStubBase5Stub"#n"Ev:\n" \
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" .if ("#n" - 10) < 0\n" \
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" .globl " UNDERSCORE "ZN14nsXPTCStubBase5Stub"#n"Ev\n" \
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THUMB_FUNC \
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GNU(".type _ZN14nsXPTCStubBase5Stub"#n"Ev,#function\n") \
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UNDERSCORE "ZN14nsXPTCStubBase5Stub"#n"Ev:\n" \
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" .else\n" \
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" .iflt ("#n" - 100)\n" \
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" .globl _ZN14nsXPTCStubBase6Stub"#n"Ev\n" \
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" .type _ZN14nsXPTCStubBase6Stub"#n"Ev,#function\n" \
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"_ZN14nsXPTCStubBase6Stub"#n"Ev:\n" \
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" .if ("#n" - 100) < 0\n" \
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" .globl " UNDERSCORE "ZN14nsXPTCStubBase6Stub"#n"Ev\n" \
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THUMB_FUNC \
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GNU(".type _ZN14nsXPTCStubBase6Stub"#n"Ev,#function\n") \
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UNDERSCORE "ZN14nsXPTCStubBase6Stub"#n"Ev:\n" \
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" .else\n" \
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" .iflt ("#n" - 1000)\n" \
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" .globl _ZN14nsXPTCStubBase7Stub"#n"Ev\n" \
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" .type _ZN14nsXPTCStubBase7Stub"#n"Ev,#function\n" \
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"_ZN14nsXPTCStubBase7Stub"#n"Ev:\n" \
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" .if ("#n" - 1000) < 0\n" \
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" .globl " UNDERSCORE "ZN14nsXPTCStubBase7Stub"#n"Ev\n" \
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THUMB_FUNC \
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GNU(".type _ZN14nsXPTCStubBase7Stub"#n"Ev,#function\n") \
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UNDERSCORE "ZN14nsXPTCStubBase7Stub"#n"Ev:\n" \
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" .else\n" \
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" .err \"stub number "#n"> 1000 not yet supported\"\n" \
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" .endif\n" \
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@ -9,6 +9,8 @@
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#include "xptcstubs_x86_64_darwin.cpp"
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#elif defined(__ppc__)
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#include "xptcstubs_ppc_rhapsody.cpp"
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#elif defined(__arm__)
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#include "xptcstubs_arm.cpp"
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#else
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#error unknown cpu architecture
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#endif
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