mips: Fix argument passing for inlined syscalls on Linux [BZ #25523]
According to [gcc documentation][1], temporary variables must be used for
the desired content to not be call-clobbered.
Fix the Linux inline syscall templates by adding temporary variables,
much like what x86 did before
(commit 381a0c26d7).
Tested with gcc 9.2.0, both cross-compiled and natively on Loongson
3A4000.
[1]: https://gcc.gnu.org/onlinedocs/gcc/Local-Register-Variables.html
This commit is contained in:
WANG Xuerui
Joseph Myers
parent
d3fbb18aa3
commit
4fbba6fe90
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@ -178,10 +178,11 @@ union __mips_syscall_return
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long int _sys_result; \
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\
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{ \
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long int _arg1 = (long int) (arg1); \
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register long int __s0 asm ("$16") __attribute__ ((unused)) \
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= (number); \
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register long int __v0 asm ("$2"); \
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register long int __a0 asm ("$4") = (long int) (arg1); \
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register long int __a0 asm ("$4") = _arg1; \
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register long int __a3 asm ("$7"); \
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__asm__ volatile ( \
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".set\tnoreorder\n\t" \
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@ -202,11 +203,13 @@ union __mips_syscall_return
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long int _sys_result; \
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\
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{ \
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long int _arg1 = (long int) (arg1); \
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long int _arg2 = (long int) (arg2); \
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register long int __s0 asm ("$16") __attribute__ ((unused)) \
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= (number); \
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register long int __v0 asm ("$2"); \
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register long int __a0 asm ("$4") = (long int) (arg1); \
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register long int __a1 asm ("$5") = (long int) (arg2); \
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register long int __a0 asm ("$4") = _arg1; \
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register long int __a1 asm ("$5") = _arg2; \
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register long int __a3 asm ("$7"); \
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__asm__ volatile ( \
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".set\tnoreorder\n\t" \
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@ -228,12 +231,15 @@ union __mips_syscall_return
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long int _sys_result; \
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\
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{ \
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long int _arg1 = (long int) (arg1); \
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long int _arg2 = (long int) (arg2); \
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long int _arg3 = (long int) (arg3); \
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register long int __s0 asm ("$16") __attribute__ ((unused)) \
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= (number); \
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register long int __v0 asm ("$2"); \
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register long int __a0 asm ("$4") = (long int) (arg1); \
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register long int __a1 asm ("$5") = (long int) (arg2); \
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register long int __a2 asm ("$6") = (long int) (arg3); \
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register long int __a0 asm ("$4") = _arg1; \
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register long int __a1 asm ("$5") = _arg2; \
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register long int __a2 asm ("$6") = _arg3; \
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register long int __a3 asm ("$7"); \
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__asm__ volatile ( \
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".set\tnoreorder\n\t" \
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@ -255,13 +261,17 @@ union __mips_syscall_return
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long int _sys_result; \
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\
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{ \
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long int _arg1 = (long int) (arg1); \
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long int _arg2 = (long int) (arg2); \
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long int _arg3 = (long int) (arg3); \
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long int _arg4 = (long int) (arg4); \
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register long int __s0 asm ("$16") __attribute__ ((unused)) \
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= (number); \
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register long int __v0 asm ("$2"); \
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register long int __a0 asm ("$4") = (long int) (arg1); \
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register long int __a1 asm ("$5") = (long int) (arg2); \
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register long int __a2 asm ("$6") = (long int) (arg3); \
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register long int __a3 asm ("$7") = (long int) (arg4); \
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register long int __a0 asm ("$4") = _arg1; \
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register long int __a1 asm ("$5") = _arg2; \
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register long int __a2 asm ("$6") = _arg3; \
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register long int __a3 asm ("$7") = _arg4; \
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__asm__ volatile ( \
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".set\tnoreorder\n\t" \
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v0_init \
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@ -138,10 +138,11 @@
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long int _sys_result; \
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\
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{ \
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long long int _arg1 = ARGIFY (arg1); \
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register long long int __s0 asm ("$16") __attribute__ ((unused))\
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= (number); \
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register long long int __v0 asm ("$2"); \
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register long long int __a0 asm ("$4") = ARGIFY (arg1); \
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register long long int __a0 asm ("$4") = _arg1; \
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register long long int __a3 asm ("$7"); \
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__asm__ volatile ( \
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".set\tnoreorder\n\t" \
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@ -162,11 +163,13 @@
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long int _sys_result; \
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\
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{ \
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long long int _arg1 = ARGIFY (arg1); \
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long long int _arg2 = ARGIFY (arg2); \
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register long long int __s0 asm ("$16") __attribute__ ((unused))\
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= (number); \
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register long long int __v0 asm ("$2"); \
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register long long int __a0 asm ("$4") = ARGIFY (arg1); \
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register long long int __a1 asm ("$5") = ARGIFY (arg2); \
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register long long int __a0 asm ("$4") = _arg1; \
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register long long int __a1 asm ("$5") = _arg2; \
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register long long int __a3 asm ("$7"); \
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__asm__ volatile ( \
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".set\tnoreorder\n\t" \
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@ -188,12 +191,15 @@
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long int _sys_result; \
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\
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{ \
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long long int _arg1 = ARGIFY (arg1); \
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long long int _arg2 = ARGIFY (arg2); \
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long long int _arg3 = ARGIFY (arg3); \
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register long long int __s0 asm ("$16") __attribute__ ((unused))\
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= (number); \
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register long long int __v0 asm ("$2"); \
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register long long int __a0 asm ("$4") = ARGIFY (arg1); \
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register long long int __a1 asm ("$5") = ARGIFY (arg2); \
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register long long int __a2 asm ("$6") = ARGIFY (arg3); \
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register long long int __a0 asm ("$4") = _arg1; \
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register long long int __a1 asm ("$5") = _arg2; \
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register long long int __a2 asm ("$6") = _arg3; \
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register long long int __a3 asm ("$7"); \
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__asm__ volatile ( \
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".set\tnoreorder\n\t" \
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@ -215,13 +221,17 @@
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long int _sys_result; \
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\
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{ \
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long long int _arg1 = ARGIFY (arg1); \
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long long int _arg2 = ARGIFY (arg2); \
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long long int _arg3 = ARGIFY (arg3); \
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long long int _arg4 = ARGIFY (arg4); \
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register long long int __s0 asm ("$16") __attribute__ ((unused))\
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= (number); \
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register long long int __v0 asm ("$2"); \
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register long long int __a0 asm ("$4") = ARGIFY (arg1); \
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register long long int __a1 asm ("$5") = ARGIFY (arg2); \
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register long long int __a2 asm ("$6") = ARGIFY (arg3); \
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register long long int __a3 asm ("$7") = ARGIFY (arg4); \
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register long long int __a0 asm ("$4") = _arg1; \
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register long long int __a1 asm ("$5") = _arg2; \
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register long long int __a2 asm ("$6") = _arg3; \
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register long long int __a3 asm ("$7") = _arg4; \
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__asm__ volatile ( \
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".set\tnoreorder\n\t" \
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v0_init \
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@ -242,14 +252,19 @@
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long int _sys_result; \
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\
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{ \
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long long int _arg1 = ARGIFY (arg1); \
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long long int _arg2 = ARGIFY (arg2); \
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long long int _arg3 = ARGIFY (arg3); \
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long long int _arg4 = ARGIFY (arg4); \
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long long int _arg5 = ARGIFY (arg5); \
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register long long int __s0 asm ("$16") __attribute__ ((unused))\
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= (number); \
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register long long int __v0 asm ("$2"); \
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register long long int __a0 asm ("$4") = ARGIFY (arg1); \
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register long long int __a1 asm ("$5") = ARGIFY (arg2); \
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register long long int __a2 asm ("$6") = ARGIFY (arg3); \
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register long long int __a3 asm ("$7") = ARGIFY (arg4); \
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register long long int __a4 asm ("$8") = ARGIFY (arg5); \
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register long long int __a0 asm ("$4") = _arg1; \
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register long long int __a1 asm ("$5") = _arg2; \
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register long long int __a2 asm ("$6") = _arg3; \
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register long long int __a3 asm ("$7") = _arg4; \
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register long long int __a4 asm ("$8") = _arg5; \
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__asm__ volatile ( \
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".set\tnoreorder\n\t" \
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v0_init \
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@ -270,15 +285,21 @@
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long int _sys_result; \
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\
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{ \
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long long int _arg1 = ARGIFY (arg1); \
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long long int _arg2 = ARGIFY (arg2); \
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long long int _arg3 = ARGIFY (arg3); \
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long long int _arg4 = ARGIFY (arg4); \
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long long int _arg5 = ARGIFY (arg5); \
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long long int _arg6 = ARGIFY (arg6); \
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register long long int __s0 asm ("$16") __attribute__ ((unused))\
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= (number); \
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register long long int __v0 asm ("$2"); \
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register long long int __a0 asm ("$4") = ARGIFY (arg1); \
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register long long int __a1 asm ("$5") = ARGIFY (arg2); \
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register long long int __a2 asm ("$6") = ARGIFY (arg3); \
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register long long int __a3 asm ("$7") = ARGIFY (arg4); \
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register long long int __a4 asm ("$8") = ARGIFY (arg5); \
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register long long int __a5 asm ("$9") = ARGIFY (arg6); \
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register long long int __a0 asm ("$4") = _arg1; \
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register long long int __a1 asm ("$5") = _arg2; \
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register long long int __a2 asm ("$6") = _arg3; \
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register long long int __a3 asm ("$7") = _arg4; \
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register long long int __a4 asm ("$8") = _arg5; \
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register long long int __a5 asm ("$9") = _arg6; \
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__asm__ volatile ( \
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".set\tnoreorder\n\t" \
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v0_init \
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@ -134,10 +134,11 @@
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long int _sys_result; \
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\
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{ \
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long int _arg1 = (long int) (arg1); \
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register long int __s0 asm ("$16") __attribute__ ((unused)) \
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= (number); \
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register long int __v0 asm ("$2"); \
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register long int __a0 asm ("$4") = (long int) (arg1); \
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register long int __a0 asm ("$4") = _arg1; \
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register long int __a3 asm ("$7"); \
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__asm__ volatile ( \
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".set\tnoreorder\n\t" \
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@ -158,11 +159,13 @@
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long int _sys_result; \
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\
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{ \
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long int _arg1 = (long int) (arg1); \
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long int _arg2 = (long int) (arg2); \
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register long int __s0 asm ("$16") __attribute__ ((unused)) \
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= (number); \
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register long int __v0 asm ("$2"); \
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register long int __a0 asm ("$4") = (long int) (arg1); \
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register long int __a1 asm ("$5") = (long int) (arg2); \
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register long int __a0 asm ("$4") = _arg1; \
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register long int __a1 asm ("$5") = _arg2; \
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register long int __a3 asm ("$7"); \
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__asm__ volatile ( \
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".set\tnoreorder\n\t" \
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@ -184,12 +187,15 @@
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long int _sys_result; \
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\
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{ \
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long int _arg1 = (long int) (arg1); \
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long int _arg2 = (long int) (arg2); \
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long int _arg3 = (long int) (arg3); \
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register long int __s0 asm ("$16") __attribute__ ((unused)) \
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= (number); \
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register long int __v0 asm ("$2"); \
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register long int __a0 asm ("$4") = (long int) (arg1); \
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register long int __a1 asm ("$5") = (long int) (arg2); \
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register long int __a2 asm ("$6") = (long int) (arg3); \
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register long int __a0 asm ("$4") = _arg1; \
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register long int __a1 asm ("$5") = _arg2; \
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register long int __a2 asm ("$6") = _arg3; \
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register long int __a3 asm ("$7"); \
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__asm__ volatile ( \
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".set\tnoreorder\n\t" \
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@ -211,13 +217,17 @@
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long int _sys_result; \
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\
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{ \
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long int _arg1 = (long int) (arg1); \
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long int _arg2 = (long int) (arg2); \
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long int _arg3 = (long int) (arg3); \
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long int _arg4 = (long int) (arg4); \
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register long int __s0 asm ("$16") __attribute__ ((unused)) \
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= (number); \
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register long int __v0 asm ("$2"); \
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register long int __a0 asm ("$4") = (long int) (arg1); \
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register long int __a1 asm ("$5") = (long int) (arg2); \
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register long int __a2 asm ("$6") = (long int) (arg3); \
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register long int __a3 asm ("$7") = (long int) (arg4); \
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register long int __a0 asm ("$4") = _arg1; \
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register long int __a1 asm ("$5") = _arg2; \
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register long int __a2 asm ("$6") = _arg3; \
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register long int __a3 asm ("$7") = _arg4; \
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__asm__ volatile ( \
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".set\tnoreorder\n\t" \
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v0_init \
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@ -238,14 +248,19 @@
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long int _sys_result; \
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\
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{ \
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long int _arg1 = (long int) (arg1); \
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long int _arg2 = (long int) (arg2); \
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long int _arg3 = (long int) (arg3); \
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long int _arg4 = (long int) (arg4); \
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long int _arg5 = (long int) (arg5); \
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register long int __s0 asm ("$16") __attribute__ ((unused)) \
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= (number); \
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register long int __v0 asm ("$2"); \
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register long int __a0 asm ("$4") = (long int) (arg1); \
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register long int __a1 asm ("$5") = (long int) (arg2); \
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register long int __a2 asm ("$6") = (long int) (arg3); \
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register long int __a3 asm ("$7") = (long int) (arg4); \
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register long int __a4 asm ("$8") = (long int) (arg5); \
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register long int __a0 asm ("$4") = _arg1; \
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register long int __a1 asm ("$5") = _arg2; \
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register long int __a2 asm ("$6") = _arg3; \
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register long int __a3 asm ("$7") = _arg4; \
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register long int __a4 asm ("$8") = _arg5; \
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__asm__ volatile ( \
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".set\tnoreorder\n\t" \
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v0_init \
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@ -266,15 +281,21 @@
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long int _sys_result; \
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\
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{ \
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long int _arg1 = (long int) (arg1); \
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long int _arg2 = (long int) (arg2); \
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long int _arg3 = (long int) (arg3); \
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long int _arg4 = (long int) (arg4); \
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long int _arg5 = (long int) (arg5); \
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long int _arg6 = (long int) (arg6); \
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register long int __s0 asm ("$16") __attribute__ ((unused)) \
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= (number); \
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register long int __v0 asm ("$2"); \
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register long int __a0 asm ("$4") = (long int) (arg1); \
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register long int __a1 asm ("$5") = (long int) (arg2); \
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register long int __a2 asm ("$6") = (long int) (arg3); \
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register long int __a3 asm ("$7") = (long int) (arg4); \
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register long int __a4 asm ("$8") = (long int) (arg5); \
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register long int __a5 asm ("$9") = (long int) (arg6); \
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register long int __a0 asm ("$4") = _arg1; \
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register long int __a1 asm ("$5") = _arg2; \
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register long int __a2 asm ("$6") = _arg3; \
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register long int __a3 asm ("$7") = _arg4; \
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register long int __a4 asm ("$8") = _arg5; \
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register long int __a5 asm ("$9") = _arg6; \
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__asm__ volatile ( \
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".set\tnoreorder\n\t" \
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v0_init \
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