Add compat shim for apm(4) to translate APM BIOS function numbers from i386
to PC98-specific ones. Any binaries using apm ioctl(4) commands but built for i386 should also work on PC98 now. Reviewed by: imp, nyan
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commit
926ad40ff9
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=215139
@ -1389,6 +1389,23 @@ apmioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td
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return (EPERM);
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/* XXX compatibility with the old interface */
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args = (struct apm_bios_arg *)addr;
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#ifdef PC98
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if (((args->eax >> 8) & 0xff) == 0x53) {
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sc->bios.r.eax = args->eax & ~0xffff;
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sc->bios.r.eax |= APM_BIOS << 8;
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switch (args->eax & 0xff) {
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case 0x0a:
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sc->bios.r.eax |= APM_GETPWSTATUS;
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break;
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case 0x0e:
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sc->bios.r.eax |= APM_DRVVERSION;
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break;
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default:
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sc->bios.r.eax |= args->eax & 0xff;
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break;
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}
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} else
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#endif
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sc->bios.r.eax = args->eax;
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sc->bios.r.ebx = args->ebx;
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sc->bios.r.ecx = args->ecx;
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