annotate VPThread.s @ 5:f36e9ab2e030
separated asm singleton routines
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Merten Sach <msach@mailbox.tu-berlin.de> |
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Mon, 06 Jun 2011 18:30:00 +0200 |
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ce4ad44fcc23 |
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1
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2 //Assembly code takes the return addr off the stack and saves
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3 // into the singleton. The first field in the singleton is the
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4 // "endInstrAddr" field, and the return addr is at 0x4(%ebp)
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5 .globl asm_save_ret_to_singleton
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6 asm_save_ret_to_singleton:
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7 movl 0x4(%ebp), %eax #get ret address, ebp is the same as in the calling function
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8 movl 0x4(%esp), %edx #get argument(singletonPtrAddr) from stack
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9 movl %eax, (%edx) #write ret addr to endInstrAddr field
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10 ret
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11
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12
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13 //Assembly code changes the return addr on the stack to the one
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14 // saved into the singleton by the end-singleton-fn
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15 //The stack's return addr is at 0x4(%%ebp)
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16 .globl asm_write_ret_from_singleton
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17 asm_write_ret_from_singleton:
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18 movl 0x4(%esp), %edx #get singleton addr from stack
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19 movl (%edx), %eax #get endInstrAddr field
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20 movl %eax, 0x4(%ebp) #write return addr to the stack of the caller
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21 ret
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