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author | Max Filippov <jcmvbkbc@gmail.com> | 2013-04-15 08:39:41 +0400 |
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committer | Chris Zankel <chris@zankel.net> | 2013-05-09 12:07:10 +0400 |
commit | f4b93ba93184c23f7a903cc790b573195fb41c37 (patch) | |
tree | f117caa1f31310983af9b5d28f323f8faf02ef3b /arch/xtensa/platforms/iss/include/platform/simcall.h | |
parent | 0f7f931027da4fd2da7f33b5a074167233d88f1f (diff) | |
download | linux-f4b93ba93184c23f7a903cc790b573195fb41c37.tar.xz |
xtensa: don't use a7 in simcalls
To support FRAME_POINTER avoid using a7 in __simc (none of the existing
simcalls needs it). Replace calls to __simc with more specific
simc_read, simc_write and simc_lseek calls.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
Diffstat (limited to 'arch/xtensa/platforms/iss/include/platform/simcall.h')
-rw-r--r-- | arch/xtensa/platforms/iss/include/platform/simcall.h | 24 |
1 files changed, 13 insertions, 11 deletions
diff --git a/arch/xtensa/platforms/iss/include/platform/simcall.h b/arch/xtensa/platforms/iss/include/platform/simcall.h index b5a4edf02d76..12b15ad1e586 100644 --- a/arch/xtensa/platforms/iss/include/platform/simcall.h +++ b/arch/xtensa/platforms/iss/include/platform/simcall.h @@ -59,56 +59,58 @@ static int errno; -static inline int __simc(int a, int b, int c, int d, int e, int f) +static inline int __simc(int a, int b, int c, int d) { int ret; register int a1 asm("a2") = a; register int b1 asm("a3") = b; register int c1 asm("a4") = c; register int d1 asm("a5") = d; - register int e1 asm("a6") = e; - register int f1 asm("a7") = f; __asm__ __volatile__ ( "simcall\n" "mov %0, a2\n" "mov %1, a3\n" : "=a" (ret), "=a" (errno), "+r"(a1), "+r"(b1) - : "r"(c1), "r"(d1), "r"(e1), "r"(f1) + : "r"(c1), "r"(d1) : "memory"); return ret; } static inline int simc_open(const char *file, int flags, int mode) { - return __simc(SYS_open, (int) file, flags, mode, 0, 0); + return __simc(SYS_open, (int) file, flags, mode); } static inline int simc_close(int fd) { - return __simc(SYS_close, fd, 0, 0, 0, 0); + return __simc(SYS_close, fd, 0, 0); } static inline int simc_ioctl(int fd, int request, void *arg) { - return __simc(SYS_ioctl, fd, request, (int) arg, 0, 0); + return __simc(SYS_ioctl, fd, request, (int) arg); } static inline int simc_read(int fd, void *buf, size_t count) { - return __simc(SYS_read, fd, (int) buf, count, 0, 0); + return __simc(SYS_read, fd, (int) buf, count); } static inline int simc_write(int fd, const void *buf, size_t count) { - return __simc(SYS_write, fd, (int) buf, count, 0, 0); + return __simc(SYS_write, fd, (int) buf, count); } static inline int simc_poll(int fd) { struct timeval tv = { .tv_sec = 0, .tv_usec = 0 }; - return __simc(SYS_select_one, fd, XTISS_SELECT_ONE_READ, (int)&tv, - 0, 0); + return __simc(SYS_select_one, fd, XTISS_SELECT_ONE_READ, (int)&tv); +} + +static inline int simc_lseek(int fd, uint32_t off, int whence) +{ + return __simc(SYS_lseek, fd, off, whence); } #endif /* _XTENSA_PLATFORM_ISS_SIMCALL_H */ |