diff options
| author | grischka <grischka> | 2009-07-18 22:06:54 +0200 |
|---|---|---|
| committer | grischka <grischka> | 2009-07-18 22:06:54 +0200 |
| commit | fc977d56c90b6c6a54b7e831b5c88e37f54a5cae (patch) | |
| tree | 51d2b865b88ba820373d8240377926bca63f857d /win32/lib/chkstk.S | |
| parent | c0fc0fa0c4276debb7d0fd24f91e3af38128ad28 (diff) | |
| download | tinycc-fc977d56c90b6c6a54b7e831b5c88e37f54a5cae.tar.gz tinycc-fc977d56c90b6c6a54b7e831b5c88e37f54a5cae.tar.bz2 | |
x86-64: chkstk, alloca
Diffstat (limited to 'win32/lib/chkstk.S')
| -rw-r--r-- | win32/lib/chkstk.S | 74 |
1 files changed, 53 insertions, 21 deletions
diff --git a/win32/lib/chkstk.S b/win32/lib/chkstk.S index 837d8af..9be9597 100644 --- a/win32/lib/chkstk.S +++ b/win32/lib/chkstk.S @@ -1,29 +1,61 @@ -// ================================================= -// chkstk.s +/* ---------------------------------------------- */ +/* chkstk86.s */ + +#include "../../config.h" + +/* ---------------------------------------------- */ +#ifndef TCC_TARGET_X86_64 +/* ---------------------------------------------- */ -.text .globl __chkstk __chkstk: - xchg (%esp), %ebp // store ebp, get ret.addr - push %ebp // push ret.addr - lea 4(%esp), %ebp // setup frame ptr - push %ecx // save ecx - mov %ebp, %ecx + xchg (%esp),%ebp /* store ebp, get ret.addr */ + push %ebp /* push ret.addr */ + lea 4(%esp),%ebp /* setup frame ptr */ + push %ecx /* save ecx */ + mov %ebp,%ecx P0: - sub $4096,%ecx - test %eax,(%ecx) - sub $4096,%eax - cmp $4096,%eax - jge P0 + sub $4096,%ecx + test %eax,(%ecx) + sub $4096,%eax + cmp $4096,%eax + jge P0 + sub %eax,%ecx + test %eax,(%ecx) + + mov %esp,%eax + mov %ecx,%esp + mov (%eax),%ecx /* restore ecx */ + jmp *4(%eax) + +/* ---------------------------------------------- */ +#else +/* ---------------------------------------------- */ - sub %eax,%ecx - mov %esp,%eax - test %eax,(%ecx) - mov %ecx,%esp +.globl __chkstk + +__chkstk: + xchg (%rsp),%rbp /* store ebp, get ret.addr */ + push %rbp /* push ret.addr */ + lea 8(%rsp),%rbp /* setup frame ptr */ + push %rcx /* save ecx */ + mov %rbp,%rcx + movslq %eax,%rax +P0: + sub $4096,%rcx + test %rax,(%rcx) + sub $4096,%rax + cmp $4096,%rax + jge P0 + sub %rax,%rcx + test %rax,(%rcx) - mov (%eax),%ecx // restore ecx - mov 4(%eax),%eax - push %eax - ret + mov %rsp,%rax + mov %rcx,%rsp + mov (%rax),%rcx /* restore ecx */ + jmp *8(%rax) +/* ---------------------------------------------- */ +#endif +/* ---------------------------------------------- */ |