equal
deleted
inserted
replaced
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() { |
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65 #ifdef SPARC_WORKS |
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66 register void *esp; |
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67 __asm__("mov %%"SPELL_REG_SP", %0":"=r"(esp)); |
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68 return (address) ((char*)esp + sizeof(long)*2); |
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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; |
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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() { |
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148 #ifdef SPARC_WORKS |
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149 register intptr_t **ebp; |
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150 __asm__("mov %%"SPELL_REG_FP", %0":"=r"(ebp)); |
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151 #else |
142 register intptr_t **ebp __asm__ (SPELL_REG_FP); |
152 register intptr_t **ebp __asm__ (SPELL_REG_FP); |
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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 |
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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;}) |
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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 // |
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622 #ifdef __GNUC__ |
609 return (GET_GS() != 0); |
623 return (GET_GS() != 0); |
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624 #else |
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625 return false; |
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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 |