Align the stack to a 16 byte boundary before calling _rtld so that we can
safely initialise shared libraries that use SSE in their init sections. MFC After: 1 week
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9310a53def
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=146370
@ -32,17 +32,20 @@
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.rtld_start:
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xorl %ebp,%ebp # Clear frame pointer for good form
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movl %esp,%eax # Save initial stack pointer
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subl $8,%esp # A place to store exit procedure addr
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movl %esp,%esi # Save initial stack pointer
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andl $0xfffffff0,%esp # Align stack pointer
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subl $16,%esp # A place to store exit procedure addr
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movl %esp,%ebx # save address of exit proc
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movl %esp,%ecx # construct address of obj_main
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addl $4,%ecx
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subl $4,%esp # Keep stack aligned
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pushl %ecx # Pass address of obj_main
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pushl %ebx # Pass address of exit proc
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pushl %eax # Pass initial stack pointer to rtld
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call _rtld@PLT # Call rtld(sp); returns entry point
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addl $12,%esp # Remove arguments from stack
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addl $16,%esp # Remove arguments from stack
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popl %edx # Get exit procedure address
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addl $4,%esp # Ignore obj_main
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movl %esi,%esp # Ignore obj_main
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/*
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* At this point, %eax contains the entry point of the main program, and
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* %edx contains a pointer to a termination function that should be
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