--- pciutils-2.1.99-test3/lib/pread.h.pread 2004-02-25 01:51:55.369843832 -0500 +++ pciutils-2.1.99-test3/lib/pread.h 2004-02-25 01:52:01.405065807 -0500 @@ -6,60 +6,6 @@ * Can be freely distributed and used under the terms of the GNU GPL. */ -/* - * We'd like to use pread/pwrite for configuration space accesses, but - * unfortunately it isn't simple at all since all libc's until glibc 2.1 - * don't define it. - */ - -#if defined(__GLIBC__) && __GLIBC__ == 2 && __GLIBC_MINOR__ > 0 -/* glibc 2.1 or newer -> pread/pwrite supported automatically */ - -#elif defined(i386) && defined(__GLIBC__) -/* glibc 2.0 on i386 -> call syscalls directly */ -#include -#include -#ifndef SYS_pread -#define SYS_pread 180 -#endif -static int pread(unsigned int fd, void *buf, size_t size, loff_t where) -{ return syscall(SYS_pread, fd, buf, size, where); } -#ifndef SYS_pwrite -#define SYS_pwrite 181 -#endif -static int pwrite(unsigned int fd, void *buf, size_t size, loff_t where) -{ return syscall(SYS_pwrite, fd, buf, size, where); } - -#elif defined(i386) -/* old libc on i386 -> call syscalls directly the old way */ -#include -static _syscall5(int, pread, unsigned int, fd, void *, buf, size_t, size, u32, where_lo, u32, where_hi); -static _syscall5(int, pwrite, unsigned int, fd, void *, buf, size_t, size, u32, where_lo, u32, where_hi); -static int do_read(struct pci_dev *d UNUSED, int fd, void *buf, size_t size, int where) { return pread(fd, buf, size, where, 0); } -static int do_write(struct pci_dev *d UNUSED, int fd, void *buf, size_t size, int where) { return pwrite(fd, buf, size, where, 0); } -#define HAVE_DO_READ - -#else -/* In all other cases we use lseek/read/write instead to be safe */ -#define make_rw_glue(op) \ - static int do_##op(struct pci_dev *d, int fd, void *buf, size_t size, int where) \ - { \ - struct pci_access *a = d->access; \ - int r; \ - if (a->fd_pos != where && lseek(fd, where, SEEK_SET) < 0) \ - return -1; \ - r = op(fd, buf, size); \ - if (r < 0) \ - a->fd_pos = -1; \ - else \ - a->fd_pos = where + r; \ - return r; \ - } -make_rw_glue(read) -make_rw_glue(write) -#define HAVE_DO_READ -#endif - #ifndef HAVE_DO_READ #define do_read(d,f,b,l,p) pread(f,b,l,p) #define do_write(d,f,b,l,p) pwrite(f,b,l,p)