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authorThiago Macieira <thiago.macieira@nokia.com>2009-10-26 10:04:21 (GMT)
committerJocelyn Turcotte <jocelyn.turcotte@nokia.com>2009-11-12 10:37:12 (GMT)
commit02c19a26d881a67f94b680dab3de07c16017dd98 (patch)
tree9a9623d36814c17cfa07f4f9aae61cc17dfbe2fb /src/3rdparty/webkit
parent448322c0473a8bbdf560cb7e52db4176f20913ed (diff)
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Re-apply change a6123418522a3865d462cb64022f567462603af1 by Thiago Macieira
Re-apply change 0951f86be22633e1ff763de935f9c35a20f8a575 by Thiago Macieira Re-apply change 7293097060383bcb75ee9f3e6a270de3b5bee2dc by Thiago Macieira Re-apply change e2ef97128c006ac2a5c99c67bb54eebaa3b45720 by Thiago Macieira Implement symbol hiding for JSC's JIT functions. These functions are implemented directly in assembly, so they need the proper directives to enable/disable visibility. On ELF systems, it's .hidden, whereas on Mach-O systems (Mac) it's .private_extern. On Windows, it's not necessary since you have to explicitly export. I also implemented the AIX idiom, though it's unlikely anyone will implement AIX/POWER JIT. That leaves only HP-UX on PA-RISC unimplemented, from the platforms that Qt supports. It's also unlikely that we'll imlpement JIT for it. Reviewed-by: Kent Hansen (this commit was 26d0990c66068bfc92a2ec77512b26d4a0c11b02, but was lost during a WebKit update)
Diffstat (limited to 'src/3rdparty/webkit')
-rw-r--r--src/3rdparty/webkit/JavaScriptCore/jit/JITStubs.cpp37
1 files changed, 37 insertions, 0 deletions
diff --git a/src/3rdparty/webkit/JavaScriptCore/jit/JITStubs.cpp b/src/3rdparty/webkit/JavaScriptCore/jit/JITStubs.cpp
index 9fa898a..470ed0b 100644
--- a/src/3rdparty/webkit/JavaScriptCore/jit/JITStubs.cpp
+++ b/src/3rdparty/webkit/JavaScriptCore/jit/JITStubs.cpp
@@ -81,6 +81,19 @@ namespace JSC {
#define SYMBOL_STRING_RELOCATION(name) SYMBOL_STRING(name)
#endif
+#if PLATFORM(DARWIN)
+ // Mach-O platform
+#define HIDE_SYMBOL(name) ".private_extern _" #name
+#elif PLATFORM(AIX)
+ // IBM's own file format
+#define HIDE_SYMBOL(name) ".lglobl " #name
+#elif PLATFORM(LINUX) || PLATFORM(FREEBSD) || PLATFORM(OPENBSD) || PLATFORM(SOLARIS) || (PLATFORM(HPUX) && PLATFORM(IA64)) || PLATFORM(SYMBIAN) || PLATFORM(NETBSD)
+ // ELF platform
+#define HIDE_SYMBOL(name) ".hidden " #name
+#else
+#define HIDE_SYMBOL(name)
+#endif
+
#if USE(JSVALUE32_64)
#if COMPILER(GCC) && PLATFORM(X86)
@@ -95,6 +108,7 @@ COMPILE_ASSERT(offsetof(struct JITStackFrame, code) == 0x50, JITStackFrame_code_
asm volatile (
".text\n"
".globl " SYMBOL_STRING(ctiTrampoline) "\n"
+HIDE_SYMBOL(ctiTrampoline) "\n"
SYMBOL_STRING(ctiTrampoline) ":" "\n"
"pushl %ebp" "\n"
"movl %esp, %ebp" "\n"
@@ -115,6 +129,7 @@ SYMBOL_STRING(ctiTrampoline) ":" "\n"
asm volatile (
".globl " SYMBOL_STRING(ctiVMThrowTrampoline) "\n"
+HIDE_SYMBOL(ctiVMThrowTrampoline) "\n"
SYMBOL_STRING(ctiVMThrowTrampoline) ":" "\n"
#if !USE(JIT_STUB_ARGUMENT_VA_LIST)
"movl %esp, %ecx" "\n"
@@ -130,6 +145,7 @@ SYMBOL_STRING(ctiVMThrowTrampoline) ":" "\n"
asm volatile (
".globl " SYMBOL_STRING(ctiOpThrowNotCaught) "\n"
+HIDE_SYMBOL(ctiOpThrowNotCaught) "\n"
SYMBOL_STRING(ctiOpThrowNotCaught) ":" "\n"
"addl $0x3c, %esp" "\n"
"popl %ebx" "\n"
@@ -154,6 +170,7 @@ COMPILE_ASSERT(offsetof(struct JITStackFrame, code) == 0x80, JITStackFrame_code_
asm volatile (
".globl " SYMBOL_STRING(ctiTrampoline) "\n"
+HIDE_SYMBOL(ctiTrampoline) "\n"
SYMBOL_STRING(ctiTrampoline) ":" "\n"
"pushq %rbp" "\n"
"movq %rsp, %rbp" "\n"
@@ -180,6 +197,7 @@ SYMBOL_STRING(ctiTrampoline) ":" "\n"
asm volatile (
".globl " SYMBOL_STRING(ctiVMThrowTrampoline) "\n"
+HIDE_SYMBOL(ctiVMThrowTrampoline) "\n"
SYMBOL_STRING(ctiVMThrowTrampoline) ":" "\n"
"movq %rsp, %rdi" "\n"
"call " SYMBOL_STRING_RELOCATION(cti_vm_throw) "\n"
@@ -195,6 +213,7 @@ SYMBOL_STRING(ctiVMThrowTrampoline) ":" "\n"
asm volatile (
".globl " SYMBOL_STRING(ctiOpThrowNotCaught) "\n"
+HIDE_SYMBOL(ctiOpThrowNotCaught) "\n"
SYMBOL_STRING(ctiOpThrowNotCaught) ":" "\n"
"addq $0x48, %rsp" "\n"
"popq %rbx" "\n"
@@ -216,6 +235,7 @@ asm volatile (
".text" "\n"
".align 2" "\n"
".globl " SYMBOL_STRING(ctiTrampoline) "\n"
+HIDE_SYMBOL(ctiTrampoline) "\n"
".thumb" "\n"
".thumb_func " THUMB_FUNC_PARAM(ctiTrampoline) "\n"
SYMBOL_STRING(ctiTrampoline) ":" "\n"
@@ -242,6 +262,7 @@ asm volatile (
".text" "\n"
".align 2" "\n"
".globl " SYMBOL_STRING(ctiVMThrowTrampoline) "\n"
+HIDE_SYMBOL(ctiVMThrowTrampoline) "\n"
".thumb" "\n"
".thumb_func " THUMB_FUNC_PARAM(ctiVMThrowTrampoline) "\n"
SYMBOL_STRING(ctiVMThrowTrampoline) ":" "\n"
@@ -347,7 +368,9 @@ COMPILE_ASSERT(offsetof(struct JITStackFrame, code) == 0x30, JITStackFrame_code_
COMPILE_ASSERT(offsetof(struct JITStackFrame, savedEBX) == 0x1c, JITStackFrame_stub_argument_space_matches_ctiTrampoline);
asm volatile (
+".text\n"
".globl " SYMBOL_STRING(ctiTrampoline) "\n"
+HIDE_SYMBOL(ctiTrampoline) "\n"
SYMBOL_STRING(ctiTrampoline) ":" "\n"
"pushl %ebp" "\n"
"movl %esp, %ebp" "\n"
@@ -368,6 +391,7 @@ SYMBOL_STRING(ctiTrampoline) ":" "\n"
asm volatile (
".globl " SYMBOL_STRING(ctiVMThrowTrampoline) "\n"
+HIDE_SYMBOL(ctiVMThrowTrampoline) "\n"
SYMBOL_STRING(ctiVMThrowTrampoline) ":" "\n"
#if !USE(JIT_STUB_ARGUMENT_VA_LIST)
"movl %esp, %ecx" "\n"
@@ -383,6 +407,7 @@ SYMBOL_STRING(ctiVMThrowTrampoline) ":" "\n"
asm volatile (
".globl " SYMBOL_STRING(ctiOpThrowNotCaught) "\n"
+HIDE_SYMBOL(ctiOpThrowNotCaught) "\n"
SYMBOL_STRING(ctiOpThrowNotCaught) ":" "\n"
"addl $0x1c, %esp" "\n"
"popl %ebx" "\n"
@@ -405,7 +430,9 @@ COMPILE_ASSERT(offsetof(struct JITStackFrame, code) == 0x48, JITStackFrame_code_
COMPILE_ASSERT(offsetof(struct JITStackFrame, savedRBX) == 0x78, JITStackFrame_stub_argument_space_matches_ctiTrampoline);
asm volatile (
+".text\n"
".globl " SYMBOL_STRING(ctiTrampoline) "\n"
+HIDE_SYMBOL(ctiTrampoline) "\n"
SYMBOL_STRING(ctiTrampoline) ":" "\n"
"pushq %rbp" "\n"
"movq %rsp, %rbp" "\n"
@@ -439,6 +466,7 @@ SYMBOL_STRING(ctiTrampoline) ":" "\n"
asm volatile (
".globl " SYMBOL_STRING(ctiVMThrowTrampoline) "\n"
+HIDE_SYMBOL(ctiVMThrowTrampoline) "\n"
SYMBOL_STRING(ctiVMThrowTrampoline) ":" "\n"
"movq %rsp, %rdi" "\n"
"call " SYMBOL_STRING_RELOCATION(cti_vm_throw) "\n"
@@ -454,6 +482,7 @@ SYMBOL_STRING(ctiVMThrowTrampoline) ":" "\n"
asm volatile (
".globl " SYMBOL_STRING(ctiOpThrowNotCaught) "\n"
+HIDE_SYMBOL(ctiOpThrowNotCaught) "\n"
SYMBOL_STRING(ctiOpThrowNotCaught) ":" "\n"
"addq $0x78, %rsp" "\n"
"popq %rbx" "\n"
@@ -475,6 +504,7 @@ asm volatile (
".text" "\n"
".align 2" "\n"
".globl " SYMBOL_STRING(ctiTrampoline) "\n"
+HIDE_SYMBOL(ctiTrampoline) "\n"
".thumb" "\n"
".thumb_func " THUMB_FUNC_PARAM(ctiTrampoline) "\n"
SYMBOL_STRING(ctiTrampoline) ":" "\n"
@@ -501,6 +531,7 @@ asm volatile (
".text" "\n"
".align 2" "\n"
".globl " SYMBOL_STRING(ctiVMThrowTrampoline) "\n"
+HIDE_SYMBOL(ctiVMThrowTrampoline) "\n"
".thumb" "\n"
".thumb_func " THUMB_FUNC_PARAM(ctiVMThrowTrampoline) "\n"
SYMBOL_STRING(ctiVMThrowTrampoline) ":" "\n"
@@ -518,6 +549,7 @@ asm volatile (
".text" "\n"
".align 2" "\n"
".globl " SYMBOL_STRING(ctiOpThrowNotCaught) "\n"
+HIDE_SYMBOL(ctiOpThrowNotCaught) "\n"
".thumb" "\n"
".thumb_func " THUMB_FUNC_PARAM(ctiOpThrowNotCaught) "\n"
SYMBOL_STRING(ctiOpThrowNotCaught) ":" "\n"
@@ -532,7 +564,9 @@ SYMBOL_STRING(ctiOpThrowNotCaught) ":" "\n"
#elif COMPILER(GCC) && PLATFORM(ARM_TRADITIONAL)
asm volatile (
+".text\n"
".globl " SYMBOL_STRING(ctiTrampoline) "\n"
+HIDE_SYMBOL(ctiTrampoline) "\n"
SYMBOL_STRING(ctiTrampoline) ":" "\n"
"stmdb sp!, {r1-r3}" "\n"
"stmdb sp!, {r4-r8, lr}" "\n"
@@ -549,12 +583,14 @@ SYMBOL_STRING(ctiTrampoline) ":" "\n"
asm volatile (
".globl " SYMBOL_STRING(ctiVMThrowTrampoline) "\n"
+HIDE_SYMBOL(ctiVMThrowTrampoline) "\n"
SYMBOL_STRING(ctiVMThrowTrampoline) ":" "\n"
"mov r0, sp" "\n"
"bl " SYMBOL_STRING_RELOCATION(cti_vm_throw) "\n"
// Both has the same return sequence
".globl " SYMBOL_STRING(ctiOpThrowNotCaught) "\n"
+HIDE_SYMBOL(ctiOpThrowNotCaught) "\n"
SYMBOL_STRING(ctiOpThrowNotCaught) ":" "\n"
"add sp, sp, #36" "\n"
"ldmia sp!, {r4-r8, lr}" "\n"
@@ -889,6 +925,7 @@ static NEVER_INLINE void throwStackOverflowError(CallFrame* callFrame, JSGlobalD
".text" "\n" \
".align 2" "\n" \
".globl " SYMBOL_STRING(cti_##op) "\n" \
+ HIDE_SYMBOL(cti_##op) "\n" \
".thumb" "\n" \
".thumb_func " THUMB_FUNC_PARAM(cti_##op) "\n" \
SYMBOL_STRING(cti_##op) ":" "\n" \