Added mips to tables. Extra column added for boolean error register, since
both ia64 and mips use this convention. Added explicit non-register argument
passing note for mips/o32.
Added arm64 to tables.
Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx>
---
man2/syscall.2 | 47 +++++++++++++++++++++++++++--------------------
1 file changed, 27 insertions(+), 20 deletions(-)
diff --git a/man2/syscall.2 b/man2/syscall.2
index 3e76e56..05bf042 100644
--- a/man2/syscall.2
+++ b/man2/syscall.2
@@ -36,6 +36,8 @@
.\"
.\" 2002-03-20 Christoph Hellwig <hch@xxxxxxxxxxxxx>
.\" - adopted for Linux
+.\" 2015-01-17, Kees Cook <keescook@xxxxxxxxxxxx>
+.\" Added mips and arm64.
.\"
.TH SYSCALL 2 2014-12-31 "Linux" "Linux Programmer's Manual"
.SH NAME
@@ -148,29 +150,29 @@ The first table lists the instruction used to transition to kernel mode,
so you might have to refer to
.BR vdso (7)),
the register used to indicate the system call number,
-and the register used to return the system call result.
+the register used to return the system call result,
+and the register used to indicate simple boolean failure of
+the system call.
.if t \{\
.ft CW
\}
.TS
-l l1 l l1 l.
-arch/ABI instruction syscall # retval Notes
+l l l l l l.
+arch/ABI instruction syscall # retval bool error Notes
_
-arm/OABI swi NR - a1 NR is syscall #
-arm/EABI swi 0x0 r7 r0
-blackfin excpt 0x0 P0 R0
-i386 int $0x80 eax eax
-ia64 break 0x100000 r15 r10/r8 T{
-bool error/
-.br
-errno value
-T}
-parisc ble 0x100(%sr2, %r0) r20 r28
-s390 svc 0 r1 r2 See below
-s390x svc 0 r1 r2 See below
-sparc/32 t 0x10 g1 o0
-sparc/64 t 0x6d g1 o0
-x86_64 syscall rax rax
+arm/OABI swi NR - a1 - NR is syscall #
+arm/EABI swi 0x0 r7 r0 -
+arm64 svc #0 x8 x0 -
+blackfin excpt 0x0 P0 R0 -
+i386 int $0x80 eax eax -
+ia64 break 0x100000 r15 r8 r10
+mips syscall v0 v0 a3
+parisc ble 0x100(%sr2, %r0) r20 r28 -
+s390 svc 0 r1 r2 - See below
+s390x svc 0 r1 r2 - See below
+sparc/32 t 0x10 g1 o0 -
+sparc/64 t 0x6d g1 o0 -
+x86_64 syscall rax rax -
.TE
.PP
For s390 and s390x, NR (the system call number)
@@ -185,14 +187,17 @@ The second table shows the registers used to pass the system call arguments.
.ft CW
\}
.TS
-l l l l l l l l.
-arch/ABI arg1 arg2 arg3 arg4 arg5 arg6 arg7
+l l l l l l l l l.
+arch/ABI arg1 arg2 arg3 arg4 arg5 arg6 arg7 Notes
_
arm/OABI a1 a2 a3 a4 v1 v2 v3
arm/EABI r0 r1 r2 r3 r4 r5 r6
+arm64 x0 x1 x2 x3 x4 x5 -
blackfin R0 R1 R2 R3 R4 R5 -
i386 ebx ecx edx esi edi ebp -
ia64 out0 out1 out2 out3 out4 out5 -
+mips/o32 a0 a1 a2 a3 - - - See below
+mips/n32,64 a0 a1 a2 a3 a4 a5 -
parisc r26 r25 r24 r23 r22 r21 -
s390 r2 r3 r4 r5 r6 r7 -
s390x r2 r3 r4 r5 r6 r7 -
@@ -200,6 +205,8 @@ sparc/32 o0 o1 o2 o3 o4 o5 -
sparc/64 o0 o1 o2 o3 o4 o5 -
x86_64 rdi rsi rdx r10 r8 r9 -
.TE
+.PP
+The mips/o32 syscall convention passes arguments 5 through 8 on the user stack.
.if t \{\
.in
.ft P
--
1.9.1
--
Kees Cook
Chrome OS Security
--
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