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44 lines
1.5 KiB
C
44 lines
1.5 KiB
C
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#define ALIGN_DATA .align 2 /* 4 byte alignment, zero filled */
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#define ALIGN_TEXT .align 2,0x90 /* 4-byte alignment, nop filled */
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#define SUPERALIGN_TEXT .align 4,0x90 /* 16-byte alignment (better for 486), nop filled */
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#define GEN_ENTRY(name) ALIGN_TEXT; .globl name; name:
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#define NON_GPROF_ENTRY(name) GEN_ENTRY(_/**/name)
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#ifdef GPROF
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/*
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* ALTENTRY() must be before a corresponding ENTRY() so that it can jump
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* over the mcounting.
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*/
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#define ALTENTRY(name) GEN_ENTRY(_/**/name); MCOUNT; jmp 2f
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#define ENTRY(name) GEN_ENTRY(_/**/name); MCOUNT; 2:
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/*
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* The call to mcount supports the usual (bad) conventions. We allocate
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* some data and pass a pointer to it although the FreeBSD doesn't use
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* the data. We set up a frame before calling mcount because that is
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* the standard convention although it makes work for both mcount and
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* callers.
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*/
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#define MCOUNT .data; ALIGN_DATA; 1:; .long 0; .text; \
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pushl %ebp; movl %esp,%ebp; \
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movl $1b,%eax; call mcount; popl %ebp
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#else
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/*
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* ALTENTRY() has to align because it is before a corresponding ENTRY().
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* ENTRY() has to align to because there may be no ALTENTRY() before it.
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* If there is a previous ALTENTRY() then the alignment code is empty.
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*/
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#define ALTENTRY(name) GEN_ENTRY(_/**/name)
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#define ENTRY(name) GEN_ENTRY(_/**/name)
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#endif
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#ifdef DUMMY_NOPS /* this will break some older machines */
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#define FASTER_NOP
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#define NOP
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#else
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#define FASTER_NOP pushl %eax ; inb $0x84,%al ; popl %eax
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#define NOP pushl %eax ; inb $0x84,%al ; inb $0x84,%al ; popl %eax
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#endif
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