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authorRich Felker <dalias@aerifal.cx>2019-04-10 20:11:19 -0400
committerRich Felker <dalias@aerifal.cx>2019-04-10 20:11:19 -0400
commit788d5e24ca19c6291cebd8d1ad5b5ed6abf42665 (patch)
tree1ae614424b48069950baec8ae09699d750fe3414 /src
parent1bcdaeee6e659f1d856717c9aa562a068f2f3bd4 (diff)
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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')
-rw-r--r--src/internal/aarch64/syscall.s14
-rw-r--r--src/internal/arm/syscall.s15
-rw-r--r--src/internal/i386/syscall.s21
-rw-r--r--src/internal/m68k/syscall.s9
-rw-r--r--src/internal/microblaze/syscall.s14
-rw-r--r--src/internal/mips/syscall.s26
-rw-r--r--src/internal/mips64/syscall.s19
-rw-r--r--src/internal/mipsn32/syscall.s19
-rw-r--r--src/internal/or1k/syscall.s14
-rw-r--r--src/internal/powerpc/syscall.s19
-rw-r--r--src/internal/powerpc64/syscall.s17
-rw-r--r--src/internal/s390x/syscall.s15
-rw-r--r--src/internal/sh/syscall.s23
-rw-r--r--src/internal/syscall.c0
-rw-r--r--src/internal/syscall.h13
-rw-r--r--src/internal/x32/syscall.s13
-rw-r--r--src/internal/x86_64/syscall.s13
-rw-r--r--src/thread/__syscall_cp.c2
18 files changed, 2 insertions, 264 deletions
diff --git a/src/internal/aarch64/syscall.s b/src/internal/aarch64/syscall.s
deleted file mode 100644
index 845986bf..00000000
--- a/src/internal/aarch64/syscall.s
+++ /dev/null
@@ -1,14 +0,0 @@
-.global __syscall
-.hidden __syscall
-.type __syscall,%function
-__syscall:
- uxtw x8,w0
- mov x0,x1
- mov x1,x2
- mov x2,x3
- mov x3,x4
- mov x4,x5
- mov x5,x6
- mov x6,x7
- svc 0
- ret
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
-.global __syscall
-.hidden __syscall
-.type __syscall,%function
-__syscall:
- 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
diff --git a/src/internal/i386/syscall.s b/src/internal/i386/syscall.s
deleted file mode 100644
index 004ddfef..00000000
--- a/src/internal/i386/syscall.s
+++ /dev/null
@@ -1,21 +0,0 @@
-.global __syscall
-.hidden __syscall
-.type __syscall,@function
-__syscall:
- push %ebx
- push %esi
- push %edi
- push %ebp
- mov 20(%esp),%eax
- mov 24(%esp),%ebx
- mov 28(%esp),%ecx
- mov 32(%esp),%edx
- mov 36(%esp),%esi
- mov 40(%esp),%edi
- mov 44(%esp),%ebp
- call *%gs:16
- pop %ebp
- pop %edi
- pop %esi
- pop %ebx
- ret
diff --git a/src/internal/m68k/syscall.s b/src/internal/m68k/syscall.s
deleted file mode 100644
index 9972a34d..00000000
--- a/src/internal/m68k/syscall.s
+++ /dev/null
@@ -1,9 +0,0 @@
-.global __syscall
-.hidden __syscall
-.type __syscall,%function
-__syscall:
- movem.l %d2-%d5,-(%sp)
- movem.l 20(%sp),%d0-%d5/%a0
- trap #0
- movem.l (%sp)+,%d2-%d5
- rts
diff --git a/src/internal/microblaze/syscall.s b/src/internal/microblaze/syscall.s
deleted file mode 100644
index e0312e78..00000000
--- a/src/internal/microblaze/syscall.s
+++ /dev/null
@@ -1,14 +0,0 @@
-.global __syscall
-.hidden __syscall
-.type __syscall,@function
-__syscall:
- addi r12, r5, 0 # Save the system call number
- add r5, r6, r0 # Shift the arguments, arg1
- add r6, r7, r0 # arg2
- add r7, r8, r0 # arg3
- add r8, r9, r0 # arg4
- add r9, r10, r0 # arg5
- lwi r10, r1, 28 # Get arg6.
- brki r14, 0x8 # syscall
- rtsd r15, 8
- nop
diff --git a/src/internal/mips/syscall.s b/src/internal/mips/syscall.s
deleted file mode 100644
index 5d0def52..00000000
--- a/src/internal/mips/syscall.s
+++ /dev/null
@@ -1,26 +0,0 @@
-.set noreorder
-
-.global __syscall
-.hidden __syscall
-.type __syscall,@function
-__syscall:
- move $2, $4
- move $4, $5
- move $5, $6
- move $6, $7
- lw $7, 16($sp)
- lw $8, 20($sp)
- lw $9, 24($sp)
- lw $10,28($sp)
- subu $sp, $sp, 32
- sw $8, 16($sp)
- sw $9, 20($sp)
- sw $10,24($sp)
- sw $2 ,28($sp)
- lw $2, 28($sp)
- syscall
- beq $7, $0, 1f
- addu $sp, $sp, 32
- subu $2, $0, $2
-1: jr $ra
- nop
diff --git a/src/internal/mips64/syscall.s b/src/internal/mips64/syscall.s
deleted file mode 100644
index 98448667..00000000
--- a/src/internal/mips64/syscall.s
+++ /dev/null
@@ -1,19 +0,0 @@
-.set noreorder
-.global __syscall
-.hidden __syscall
-.type __syscall,@function
-__syscall:
- move $2, $4
- move $4, $5
- move $5, $6
- move $6, $7
- move $7, $8
- move $8, $9
- move $9, $10
- move $10, $11
- syscall
- beq $7, $0, 1f
- nop
- dsubu $2, $0, $2
-1: jr $ra
- nop
diff --git a/src/internal/mipsn32/syscall.s b/src/internal/mipsn32/syscall.s
deleted file mode 100644
index 510a6fa4..00000000
--- a/src/internal/mipsn32/syscall.s
+++ /dev/null
@@ -1,19 +0,0 @@
-.set noreorder
-.global __syscall
-.hidden __syscall
-.type __syscall,@function
-__syscall:
- move $2, $4
- move $4, $5
- move $5, $6
- move $6, $7
- move $7, $8
- move $8, $9
- move $9, $10
- move $10, $11
- syscall
- beq $7, $0, 1f
- nop
- subu $2, $0, $2
-1: jr $ra
- nop
diff --git a/src/internal/or1k/syscall.s b/src/internal/or1k/syscall.s
deleted file mode 100644
index 177964e9..00000000
--- a/src/internal/or1k/syscall.s
+++ /dev/null
@@ -1,14 +0,0 @@
-.global __syscall
-.hidden __syscall
-.type __syscall,@function
-__syscall:
- l.ori r11, r3, 0
- l.lwz r3, 0(r1)
- l.lwz r4, 4(r1)
- l.lwz r5, 8(r1)
- l.lwz r6, 12(r1)
- l.lwz r7, 16(r1)
- l.lwz r8, 20(r1)
- l.sys 1
- l.jr r9
- l.nop
diff --git a/src/internal/powerpc/syscall.s b/src/internal/powerpc/syscall.s
deleted file mode 100644
index 5b16b8f2..00000000
--- a/src/internal/powerpc/syscall.s
+++ /dev/null
@@ -1,19 +0,0 @@
- .global __syscall
- .hidden __syscall
- .type __syscall,@function
-__syscall:
- mr 0, 3 # Save the system call number
- mr 3, 4 # Shift the arguments: arg1
- mr 4, 5 # arg2
- mr 5, 6 # arg3
- mr 6, 7 # arg4
- mr 7, 8 # arg5
- mr 8, 9 # arg6
- sc
- bnslr+ # return if not summary overflow
- #else error:
- # return negated value.
- neg 3, 3
- blr
- .end __syscall
- .size __syscall, .-__syscall
diff --git a/src/internal/powerpc64/syscall.s b/src/internal/powerpc64/syscall.s
deleted file mode 100644
index fe21f9e1..00000000
--- a/src/internal/powerpc64/syscall.s
+++ /dev/null
@@ -1,17 +0,0 @@
- .global __syscall
- .hidden __syscall
- .type __syscall,@function
-__syscall:
- mr 0, 3 # Save the system call number
- mr 3, 4 # Shift the arguments: arg1
- mr 4, 5 # arg2
- mr 5, 6 # arg3
- mr 6, 7 # arg4
- mr 7, 8 # arg5
- mr 8, 9 # arg6
- sc
- bnslr+ # return if not summary overflow
- neg 3, 3 # otherwise error: return negated value.
- blr
- .end __syscall
- .size __syscall, .-__syscall
diff --git a/src/internal/s390x/syscall.s b/src/internal/s390x/syscall.s
deleted file mode 100644
index 2322bc36..00000000
--- a/src/internal/s390x/syscall.s
+++ /dev/null
@@ -1,15 +0,0 @@
-.global __syscall
-.hidden __syscall
-.type __syscall, %function
-__syscall:
- stg %r7, 56(%r15)
- lgr %r1, %r2
- lgr %r2, %r3
- lgr %r3, %r4
- lgr %r4, %r5
- lgr %r5, %r6
- lg %r6, 160(%r15)
- lg %r7, 168(%r15)
- svc 0
- lg %r7, 56(%r15)
- br %r14
diff --git a/src/internal/sh/syscall.s b/src/internal/sh/syscall.s
deleted file mode 100644
index 331918a5..00000000
--- a/src/internal/sh/syscall.s
+++ /dev/null
@@ -1,23 +0,0 @@
-.global __syscall
-.hidden __syscall
-.type __syscall, @function
-__syscall:
- ! The kernel syscall entry point documents that the trap number indicates
- ! the number of arguments being passed, but it then ignores that information.
- ! Since we do not actually know how many arguments are being passed, we will
- ! say there are six, since that is the maximum we support here.
- mov r4, r3
- mov r5, r4
- mov r6, r5
- mov r7, r6
- mov.l @r15, r7
- mov.l @(4,r15), r0
- mov.l @(8,r15), r1
- trapa #31
- or r0, r0
- or r0, r0
- or r0, r0
- or r0, r0
- or r0, r0
- rts
- nop
diff --git a/src/internal/syscall.c b/src/internal/syscall.c
deleted file mode 100644
index e69de29b..00000000
--- a/src/internal/syscall.c
+++ /dev/null
diff --git a/src/internal/syscall.h b/src/internal/syscall.h
index 06c5527f..2e810db0 100644
--- a/src/internal/syscall.h
+++ b/src/internal/syscall.h
@@ -22,27 +22,16 @@
typedef long syscall_arg_t;
#endif
-hidden long __syscall_ret(unsigned long), __syscall(syscall_arg_t, ...),
+hidden long __syscall_ret(unsigned long),
__syscall_cp(syscall_arg_t, syscall_arg_t, syscall_arg_t, syscall_arg_t,
syscall_arg_t, syscall_arg_t, syscall_arg_t);
-#ifdef SYSCALL_NO_INLINE
-#define __syscall0(n) (__syscall)(n)
-#define __syscall1(n,a) (__syscall)(n,__scc(a))
-#define __syscall2(n,a,b) (__syscall)(n,__scc(a),__scc(b))
-#define __syscall3(n,a,b,c) (__syscall)(n,__scc(a),__scc(b),__scc(c))
-#define __syscall4(n,a,b,c,d) (__syscall)(n,__scc(a),__scc(b),__scc(c),__scc(d))
-#define __syscall5(n,a,b,c,d,e) (__syscall)(n,__scc(a),__scc(b),__scc(c),__scc(d),__scc(e))
-#define __syscall6(n,a,b,c,d,e,f) (__syscall)(n,__scc(a),__scc(b),__scc(c),__scc(d),__scc(e),__scc(f))
-#else
#define __syscall1(n,a) __syscall1(n,__scc(a))
#define __syscall2(n,a,b) __syscall2(n,__scc(a),__scc(b))
#define __syscall3(n,a,b,c) __syscall3(n,__scc(a),__scc(b),__scc(c))
#define __syscall4(n,a,b,c,d) __syscall4(n,__scc(a),__scc(b),__scc(c),__scc(d))
#define __syscall5(n,a,b,c,d,e) __syscall5(n,__scc(a),__scc(b),__scc(c),__scc(d),__scc(e))
#define __syscall6(n,a,b,c,d,e,f) __syscall6(n,__scc(a),__scc(b),__scc(c),__scc(d),__scc(e),__scc(f))
-#endif
-#define __syscall7(n,a,b,c,d,e,f,g) (__syscall)(n,__scc(a),__scc(b),__scc(c),__scc(d),__scc(e),__scc(f),__scc(g))
#define __SYSCALL_NARGS_X(a,b,c,d,e,f,g,h,n,...) n
#define __SYSCALL_NARGS(...) __SYSCALL_NARGS_X(__VA_ARGS__,7,6,5,4,3,2,1,0,)
diff --git a/src/internal/x32/syscall.s b/src/internal/x32/syscall.s
deleted file mode 100644
index c4bee804..00000000
--- a/src/internal/x32/syscall.s
+++ /dev/null
@@ -1,13 +0,0 @@
-.global __syscall
-.hidden __syscall
-.type __syscall,@function
-__syscall:
- movq %rdi,%rax
- movq %rsi,%rdi
- movq %rdx,%rsi
- movq %rcx,%rdx
- movq %r8,%r10
- movq %r9,%r8
- movq 8(%rsp),%r9
- syscall
- ret
diff --git a/src/internal/x86_64/syscall.s b/src/internal/x86_64/syscall.s
deleted file mode 100644
index c4bee804..00000000
--- a/src/internal/x86_64/syscall.s
+++ /dev/null
@@ -1,13 +0,0 @@
-.global __syscall
-.hidden __syscall
-.type __syscall,@function
-__syscall:
- movq %rdi,%rax
- movq %rsi,%rdi
- movq %rdx,%rsi
- movq %rcx,%rdx
- movq %r8,%r10
- movq %r9,%r8
- movq 8(%rsp),%r9
- syscall
- ret
diff --git a/src/thread/__syscall_cp.c b/src/thread/__syscall_cp.c
index af666f06..42a01674 100644
--- a/src/thread/__syscall_cp.c
+++ b/src/thread/__syscall_cp.c
@@ -7,7 +7,7 @@ static long sccp(syscall_arg_t nr,
syscall_arg_t u, syscall_arg_t v, syscall_arg_t w,
syscall_arg_t x, syscall_arg_t y, syscall_arg_t z)
{
- return (__syscall)(nr, u, v, w, x, y, z);
+ return __syscall(nr, u, v, w, x, y, z);
}
weak_alias(sccp, __syscall_cp_c);