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authorBrandon Potter <brandon.potter@amd.com>2018-05-04 17:55:24 -0400
committerAnthony Gutierrez <anthony.gutierrez@amd.com>2018-09-19 20:51:17 +0000
commit194d650536cb49c374efdb1fe0473b3eec5dea1e (patch)
tree38ca6c67b838f539d4e75dc05bd321f9e859091a /src/sim/aux_vector.hh
parentc428c220fd351626e2ee0005dda696940261793b (diff)
downloadgem5-194d650536cb49c374efdb1fe0473b3eec5dea1e.tar.xz
syscall_emul: expand AuxVector class
The AuxVector class is responsible for holding Process data. The data that it holds is normally setup by an OS kernel in the process address space. The purpose behind doing this is to pass in information that the process will need for various reasons. (Check out the enum in the header file for an idea of what the AuxVector holds.) The AuxVector struct was changed into a class and encapsulation methods were added to protect access to the member variables. The host ISA may have a different endianness than the simulated ISA. Since data is passed between the process address space and the simulator for auxiliary vectors, we need to worry about maintaining endianness for the right context. Change-Id: I32c5ac4b679559886e1efeb4b5483b92dfc94af9 Reviewed-on: https://gem5-review.googlesource.com/12109 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Anthony Gutierrez <anthony.gutierrez@amd.com>
Diffstat (limited to 'src/sim/aux_vector.hh')
-rw-r--r--src/sim/aux_vector.hh67
1 files changed, 39 insertions, 28 deletions
diff --git a/src/sim/aux_vector.hh b/src/sim/aux_vector.hh
index 34ba48d12..1ca2d7862 100644
--- a/src/sim/aux_vector.hh
+++ b/src/sim/aux_vector.hh
@@ -37,40 +37,51 @@
#define __AUX_VECTOR_HH__
template<class IntType>
-struct AuxVector
+class AuxVector
{
- IntType a_type;
- IntType a_val;
+ public:
+ AuxVector() = default;
+ AuxVector(IntType type, IntType val);
- AuxVector()
- {}
+ IntType const& getAuxType() const { return _auxType; }
+ IntType const& getAuxVal() const { return _auxVal; }
+ IntType const& getHostAuxType() const { return _auxHostType; }
+ IntType const& getHostAuxVal() const { return _auxHostVal; }
- AuxVector(IntType type, IntType val);
+ void setAuxType(IntType type);
+ void setAuxVal(IntType val);
+
+ private:
+ IntType _auxType = 0;
+ IntType _auxVal = 0;
+ IntType _auxHostType = 0;
+ IntType _auxHostVal = 0;
};
enum AuxiliaryVectorType {
- M5_AT_NULL = 0,
- M5_AT_IGNORE = 1,
- M5_AT_EXECFD = 2,
- M5_AT_PHDR = 3,
- M5_AT_PHENT = 4,
- M5_AT_PHNUM = 5,
- M5_AT_PAGESZ = 6,
- M5_AT_BASE = 7,
- M5_AT_FLAGS = 8,
- M5_AT_ENTRY = 9,
- M5_AT_NOTELF = 10,
- M5_AT_UID = 11,
- M5_AT_EUID = 12,
- M5_AT_GID = 13,
- M5_AT_EGID = 14,
- M5_AT_PLATFORM = 15,
- M5_AT_HWCAP = 16,
- M5_AT_CLKTCK = 17,
- M5_AT_SECURE = 23,
- M5_BASE_PLATFORM = 24,
- M5_AT_RANDOM = 25,
- M5_AT_EXECFN = 31,
+ M5_AT_NULL = 0, // End of vector.
+ M5_AT_IGNORE = 1, // Ignored.
+ M5_AT_EXECFD = 2, // File descriptor of program if interpreter used.
+ M5_AT_PHDR = 3, // Address of program header tables in memory.
+ M5_AT_PHENT = 4, // Size in bytes of one program header entry.
+ M5_AT_PHNUM = 5, // Number of entries in program header table.
+ M5_AT_PAGESZ = 6, // System page size.
+ M5_AT_BASE = 7, // Base address of interpreter program in memory.
+ M5_AT_FLAGS = 8, // Unused.
+ M5_AT_ENTRY = 9, // Entry point of program after interpreter setup.
+ M5_AT_NOTELF = 10, // Non-zero if format is different than ELF.
+ M5_AT_UID = 11, // Address of real user ID of thread.
+ M5_AT_EUID = 12, // Address of effective user ID of thread.
+ M5_AT_GID = 13, // Address of real group ID of thread.
+ M5_AT_EGID = 14, // Address of effective group ID of thread.
+ M5_AT_PLATFORM = 15, // Platform string for the architecture.
+ M5_AT_HWCAP = 16, // Bits which describe the hardware capabilities.
+ M5_AT_CLKTCK = 17, // Frequency at which times() syscall increments.
+ M5_AT_SECURE = 23, // Whether to enable "secure mode" in executable.
+ M5_BASE_PLATFORM = 24, // Platform string (differs on PowerPC only).
+ M5_AT_RANDOM = 25, // Pointer to 16 bytes of random data.
+ M5_AT_HWCAP2 = 26, // Extension of AT_HWCAP.
+ M5_AT_EXECFN = 31, // Filename of the program.
M5_AT_VECTOR_SIZE = 44
};