Hi devs, (Sorry for reusing subject of a previous message, but I'm unable to reply to that message directly)
as I did not find some solution yet, I've dropped a testcase on gcc-help[1], here's the answer - what do you think ? [1] http://gcc.gnu.org/ml/gcc-help/2007-04/msg00200.html Thanks! /haubi/ -------- Forwarded Message -------- > From: Ian Lance Taylor <[EMAIL PROTECTED]> > To: Michael Haubenwallner <[EMAIL PROTECTED]> > Cc: [EMAIL PROTECTED] > Subject: Re: can't find a register in class 'GENERAL_REGS' while > reloading 'asm' > Date: 19 Apr 2007 22:43:23 -0700 > > Michael Haubenwallner <[EMAIL PROTECTED]> writes: > > > in openssl-0.9.8e there is some inlined assembler code, which does not > > compile with -fpic (or -fPIC) and -O0 on x86-linux-gnu. > > > openssl-error.c:28: error: can't find a register in class 'GENERAL_REGS' > > while reloading 'asm' > > > asm volatile ( > > "pushl %%ebx\n" > > " leal 16(%0),%%edx\n" > > " leal 32(%0),%%ebx\n" > > ".byte 0xf3,0x0f,0xa7,0xc8" "\n" > > " popl %%ebx" > > : "=a"(iv), "=c"(cnt), "=D"(out), "=S"(inp) > > : "0"(cdata), "1"(cnt), "2"(out), "3"(inp), "m"(*cdata) > > : "edx", "cc", "memory" > > ); > > This puts iv in %eax, cnt in %ecx, out in %edi, inp in %esi, and it > lists *cdata as an explicit input. You are using -fpic so %ebx is > used as a PIC register. %ebp is the frame pointer. %edx is in the > list of clobbered registers. You are left with no registers to hold > *cdata. > > I think I would write this more like > xchg %ebx, %2 > .byte 0xf3, 0x0f, 0xa7, 0xc8 > xchg %ebx, %2 > : "+c" (cnt), "+d" (cdata->len), "+r" (cdata->addr), "+D" (out), "+S" (inp) > : "cc", "memory" > > Ian -- Salomon Automation GmbH - Friesachstrasse 15 - A-8114 Friesach bei Graz Sitz der Gesellschaft: Friesach bei Graz UID-NR:ATU28654300 - Firmenbuchnummer: 49324 K Firmenbuchgericht: Landesgericht für Zivilrechtssachen Graz ______________________________________________________________________ OpenSSL Project http://www.openssl.org Development Mailing List [email protected] Automated List Manager [EMAIL PROTECTED]
