path: root/src/internal/arm/syscall.s
diff options
authorRich Felker <>2019-04-10 20:11:19 -0400
committerRich Felker <>2019-04-10 20:11:19 -0400
commit788d5e24ca19c6291cebd8d1ad5b5ed6abf42665 (patch)
tree1ae614424b48069950baec8ae09699d750fe3414 /src/internal/arm/syscall.s
parent1bcdaeee6e659f1d856717c9aa562a068f2f3bd4 (diff)
remove external __syscall function and last remaining users
the weak version of __syscall_cp_c was using a tail call to __syscall to avoid duplicating the 6-argument syscall code inline in small static-linked programs, but now that __syscall no longer exists, the inline expansion is no longer duplication. the syscall.h machinery suppported up to 7 syscall arguments, only via an external __syscall function, but we presently have no syscall call points that actually make use of that many, and the kernel only defines 7-argument calling conventions for arm, powerpc (32-bit), and sh. if it turns out we need them in the future, they can easily be added.
Diffstat (limited to 'src/internal/arm/syscall.s')
1 files changed, 0 insertions, 15 deletions
diff --git a/src/internal/arm/syscall.s b/src/internal/arm/syscall.s
deleted file mode 100644
index 64dba2fc..00000000
--- a/src/internal/arm/syscall.s
+++ /dev/null
@@ -1,15 +0,0 @@
-.syntax unified __syscall
-.hidden __syscall
-.type __syscall,%function
- mov ip,sp
- stmfd sp!,{r4,r5,r6,r7}
- mov r7,r0
- mov r0,r1
- mov r1,r2
- mov r2,r3
- ldmfd ip,{r3,r4,r5,r6}
- svc 0
- ldmfd sp!,{r4,r5,r6,r7}
- bx lr