74 lines
1.7 KiB
ArmAsm
74 lines
1.7 KiB
ArmAsm
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/* ---------------------------------------------- */
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/* chkstk86.s */
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#ifdef __leading_underscore
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# define _(s) _##s
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#else
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# define _(s) s
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#endif
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/* ---------------------------------------------- */
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#ifndef __x86_64__
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/* ---------------------------------------------- */
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.globl _(__chkstk)
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_(__chkstk):
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xchg (%esp),%ebp /* store ebp, get ret.addr */
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push %ebp /* push ret.addr */
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lea 4(%esp),%ebp /* setup frame ptr */
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push %ecx /* save ecx */
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mov %ebp,%ecx
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P0:
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sub $4096,%ecx
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test %eax,(%ecx)
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sub $4096,%eax
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cmp $4096,%eax
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jge P0
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sub %eax,%ecx
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test %eax,(%ecx)
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mov %esp,%eax
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mov %ecx,%esp
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mov (%eax),%ecx /* restore ecx */
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jmp *4(%eax)
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/* ---------------------------------------------- */
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#else
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/* ---------------------------------------------- */
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.globl _(__chkstk)
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_(__chkstk):
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xchg (%rsp),%rbp /* store ebp, get ret.addr */
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push %rbp /* push ret.addr */
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lea 8(%rsp),%rbp /* setup frame ptr */
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push %rcx /* save ecx */
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mov %rbp,%rcx
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movslq %eax,%rax
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P0:
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sub $4096,%rcx
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test %rax,(%rcx)
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sub $4096,%rax
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cmp $4096,%rax
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jge P0
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sub %rax,%rcx
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test %rax,(%rcx)
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mov %rsp,%rax
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mov %rcx,%rsp
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mov (%rax),%rcx /* restore ecx */
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jmp *8(%rax)
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/* ---------------------------------------------- */
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/* setjmp/longjmp support */
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.globl _(tinyc_getbp)
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_(tinyc_getbp):
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mov %rbp,%rax
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ret
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/* ---------------------------------------------- */
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#endif
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/* ---------------------------------------------- */
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