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authorGabe Black <gblack@eecs.umich.edu>2007-03-08 00:29:37 -0500
committerGabe Black <gblack@eecs.umich.edu>2007-03-08 00:29:37 -0500
commit5caf7210745517b625e85cf973f6f966aa93cd89 (patch)
treefbe735ac1d115d68de88ce4b16f1e1e12b9d9ee0 /src/arch/sparc/process.cc
parentf776ec84c1431c89b33364a559af76360532a0e3 (diff)
downloadgem5-5caf7210745517b625e85cf973f6f966aa93cd89.tar.xz
Fix up the SPARC initial stack frame to match an actual 32 bit process.
--HG-- extra : convert_revision : 3995744c3bf955a370b18f6e88de1bfb82f79843
Diffstat (limited to 'src/arch/sparc/process.cc')
-rw-r--r--src/arch/sparc/process.cc21
1 files changed, 11 insertions, 10 deletions
diff --git a/src/arch/sparc/process.cc b/src/arch/sparc/process.cc
index c3b833562..c22aa6781 100644
--- a/src/arch/sparc/process.cc
+++ b/src/arch/sparc/process.cc
@@ -511,8 +511,8 @@ Sparc32LiveProcess::argsInit(int intSize, int pageSize)
//Figure out how big the initial stack needs to be
- // The unaccounted for 0 at the top of the stack
- int mysterious_size = intSize;
+ // The unaccounted for 8 byte 0 at the top of the stack
+ int mysterious_size = 8;
//This is the name of the file which is present on the initial stack
//It's purpose is to let the user space linker examine the original file.
@@ -527,13 +527,14 @@ Sparc32LiveProcess::argsInit(int intSize, int pageSize)
arg_data_size += argv[i].size() + 1;
}
- //The info_block
+ //The info_block - This seems to need an pad for some reason.
int info_block_size =
- (file_name_size +
+ (mysterious_size +
+ file_name_size +
env_data_size +
- arg_data_size);
+ arg_data_size + intSize);
- //Each auxilliary vector is two 8 byte words
+ //Each auxilliary vector is two 4 byte words
int aux_array_size = intSize * 2 * (auxv.size() + 1);
int envp_array_size = intSize * (envp.size() + 1);
@@ -543,7 +544,7 @@ Sparc32LiveProcess::argsInit(int intSize, int pageSize)
int window_save_size = intSize * 16;
int space_needed =
- mysterious_size +
+ info_block_size +
aux_array_size +
envp_array_size +
argv_array_size +
@@ -566,7 +567,7 @@ Sparc32LiveProcess::argsInit(int intSize, int pageSize)
uint32_t auxv_array_base = envp_array_base + envp_array_size;
//The info block is pushed up against the top of the stack, while
//the rest of the initial stack frame is aligned to an 8 byte boudary.
- uint32_t arg_data_base = stack_base - info_block_size;
+ uint32_t arg_data_base = stack_base - info_block_size + intSize;
uint32_t env_data_base = arg_data_base + arg_data_size;
uint32_t file_name_base = env_data_base + env_data_size;
uint32_t mysterious_base = file_name_base + file_name_size;
@@ -625,8 +626,8 @@ Sparc32LiveProcess::argsInit(int intSize, int pageSize)
initVirtMem->writeBlob(spillStart, (uint8_t*)spillHandler32, spillSize);
//Set up the thread context to start running the process
- threadContexts[0]->setIntReg(ArgumentReg0, argc);
- threadContexts[0]->setIntReg(ArgumentReg1, argv_array_base);
+ //threadContexts[0]->setIntReg(ArgumentReg0, argc);
+ //threadContexts[0]->setIntReg(ArgumentReg1, argv_array_base);
threadContexts[0]->setIntReg(StackPointerReg, stack_min);
uint32_t prog_entry = objFile->entryPoint();