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ARM: Handle register indexed system calls.

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This commit is contained in:
Ali Saidi 2009-07-27 00:51:01 -07:00
parent 0a18bc0d6c
commit 99831ed938
3 changed files with 7 additions and 2 deletions
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5
src/arch/arm/isa/decoder.isa
View file

@ -422,7 +422,10 @@ format DataOp {
// ARM System Call (SoftWare Interrupt)
1: swi({{ if (testPredicate(Cpsr, condCode))
{
xc->syscall(IMMED_23_0);
if (IMMED_23_0)
xc->syscall(IMMED_23_0);
else
xc->syscall(R7);
}
}});
}

1
src/arch/arm/isa/operands.isa
View file

@ -57,6 +57,7 @@ def operands {{
'Rm': ('IntReg', 'uw', 'RM', 'IsInteger', 2, maybePCRead, maybePCWrite),
'Rs': ('IntReg', 'uw', 'RS', 'IsInteger', 3, maybePCRead, maybePCWrite),
'Rn': ('IntReg', 'uw', 'RN', 'IsInteger', 4, maybePCRead, maybePCWrite),
'R7': ('IntReg', 'uw', '7', 'IsInteger', 5),
#Destination register for load/store double instructions
'Rdo': ('IntReg', 'uw', '(RD & ~1)', 'IsInteger', 4, maybePCRead, maybePCWrite),

3
src/arch/arm/linux/process.cc
View file

@ -448,7 +448,8 @@ ArmLinuxProcess::getDesc(int callnum)
// Angel SWI syscalls are unsupported in this release
if (callnum == 0x123456) {
panic("Attempt to execute an ANGEL_SWI system call (newlib-related)");
} else if ((callnum & 0x00f00000) == 0x00900000) {
} else if ((callnum & 0x00f00000) == 0x00900000 ||
(callnum & 0xf0000) == 0xf0000) {
callnum &= 0x000fffff;
if ((callnum & 0x0f0000) == 0xf0000) {
callnum -= 0x0f0001;