Mercurial > hg > truffle

comparison src/os_cpu/linux_x86/vm/os_linux_x86.cpp @ 50:485d403e94e1

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
6452081: 3/4 Allow for Linux builds with Sun Studio Linux compilers Summary: (for Serguei) Allow for Linux builds with Sun Studio Linux compilers Reviewed-by: sspitsyn, ohair
author dcubed
date Wed, 12 Mar 2008 18:37:03 -0700
parents a61af66fc99e
children 75b0f3cb1943
comparison
equal deleted inserted replaced
49:31000d79ec71 50:485d403e94e1
60 #define SPELL_REG_SP "esp" 60 #define SPELL_REG_SP "esp"
61 #define SPELL_REG_FP "ebp" 61 #define SPELL_REG_FP "ebp"
62 #endif // AMD64 62 #endif // AMD64
63 63
64 address os::current_stack_pointer() { 64 address os::current_stack_pointer() {
65 #ifdef SPARC_WORKS
66 register void *esp;
67 __asm__("mov %%"SPELL_REG_SP", %0":"=r"(esp));
68 return (address) ((char*)esp + sizeof(long)*2);
69 #else
65 register void *esp __asm__ (SPELL_REG_SP); 70 register void *esp __asm__ (SPELL_REG_SP);
66 return (address) esp; 71 return (address) esp;
72 #endif
67 } 73 }
68 74
69 char* os::non_memory_address_word() { 75 char* os::non_memory_address_word() {
70 // Must never look like an address returned by reserve_memory, 76 // Must never look like an address returned by reserve_memory,
71 // even in its subfields (as defined by the CPU immediate fields, 77 // even in its subfields (as defined by the CPU immediate fields,
137 frame os::get_sender_for_C_frame(frame* fr) { 143 frame os::get_sender_for_C_frame(frame* fr) {
138 return frame(fr->sender_sp(), fr->link(), fr->sender_pc()); 144 return frame(fr->sender_sp(), fr->link(), fr->sender_pc());
139 } 145 }
140 146
141 intptr_t* _get_previous_fp() { 147 intptr_t* _get_previous_fp() {
148 #ifdef SPARC_WORKS
149 register intptr_t **ebp;
150 __asm__("mov %%"SPELL_REG_FP", %0":"=r"(ebp));
151 #else
142 register intptr_t **ebp __asm__ (SPELL_REG_FP); 152 register intptr_t **ebp __asm__ (SPELL_REG_FP);
153 #endif
143 return (intptr_t*) *ebp; // we want what it points to. 154 return (intptr_t*) *ebp; // we want what it points to.
144 } 155 }
145 156
146 157
147 frame os::current_frame() { 158 frame os::current_frame() {
573 // amd64: pthread on amd64 is always in floating stack mode 584 // amd64: pthread on amd64 is always in floating stack mode
574 bool os::Linux::supports_variable_stack_size() { return true; } 585 bool os::Linux::supports_variable_stack_size() { return true; }
575 #else 586 #else
576 size_t os::Linux::min_stack_allowed = (48 DEBUG_ONLY(+4))*K; 587 size_t os::Linux::min_stack_allowed = (48 DEBUG_ONLY(+4))*K;
577 588
589 #ifdef __GNUC__
578 #define GET_GS() ({int gs; __asm__ volatile("movw %%gs, %w0":"=q"(gs)); gs&0xffff;}) 590 #define GET_GS() ({int gs; __asm__ volatile("movw %%gs, %w0":"=q"(gs)); gs&0xffff;})
591 #endif
579 592
580 // Test if pthread library can support variable thread stack size. LinuxThreads 593 // Test if pthread library can support variable thread stack size. LinuxThreads
581 // in fixed stack mode allocates 2M fixed slot for each thread. LinuxThreads 594 // in fixed stack mode allocates 2M fixed slot for each thread. LinuxThreads
582 // in floating stack mode and NPTL support variable stack size. 595 // in floating stack mode and NPTL support variable stack size.
583 bool os::Linux::supports_variable_stack_size() { 596 bool os::Linux::supports_variable_stack_size() {
604 // a native application that plays with %gs, we might see non-zero %gs 617 // a native application that plays with %gs, we might see non-zero %gs
605 // even LinuxThreads is running in fixed stack mode. As the result, we'll 618 // even LinuxThreads is running in fixed stack mode. As the result, we'll
606 // return true and skip _thread_safety_check(), so we may not be able to 619 // return true and skip _thread_safety_check(), so we may not be able to
607 // detect stack-heap collisions. But otherwise it's harmless. 620 // detect stack-heap collisions. But otherwise it's harmless.
608 // 621 //
622 #ifdef __GNUC__
609 return (GET_GS() != 0); 623 return (GET_GS() != 0);
624 #else
625 return false;
626 #endif
610 } 627 }
611 } 628 }
612 #endif // AMD64 629 #endif // AMD64
613 630
614 // return default stack size for thr_type 631 // return default stack size for thr_type