- handle functions with fp regs as args
- handle arguments value at return
- try to handle more than 4 (int) args
Signed-off-by: Arnaud Patard <[email protected]>
---
sysdeps/linux-gnu/mipsel/trace.c | 56 +++++++++++++++++++++++++++-----------
1 files changed, 40 insertions(+), 16 deletions(-)
diff --git a/sysdeps/linux-gnu/mipsel/trace.c b/sysdeps/linux-gnu/mipsel/trace.c
index ff94930..6553967 100644
--- a/sysdeps/linux-gnu/mipsel/trace.c
+++ b/sysdeps/linux-gnu/mipsel/trace.c
@@ -119,31 +119,55 @@ I'm not doing any floating point support here.
long
gimme_arg(enum tof type, Process *proc, int arg_num, arg_type_info *info) {
long ret;
+ long addr;
debug(2,"type %d arg %d",type,arg_num);
- if (type == LT_TOF_FUNCTION || type == LT_TOF_SYSCALL){
+ if (arg_num == -1) {
+ if(type == LT_TOF_FUNCTIONR) {
+ return ptrace(PTRACE_PEEKUSER,proc->pid,off_v0,0);
+ }
+ if (type == LT_TOF_SYSCALLR) {
+ unsigned a3=ptrace(PTRACE_PEEKUSER, proc->pid,off_a3,0);
+ unsigned v0=ptrace(PTRACE_PEEKUSER, proc->pid,off_v0,0);
+ if(!a3){
+ return v0;
+ }
+ return -1;
+ }
+ }
+ if (type == LT_TOF_FUNCTION || type == LT_TOF_SYSCALL) {
+ /* o32: float args are in f12 and f14 */
+ if ((info->type == ARGTYPE_FLOAT) && (arg_num < 2)) {
+ ret=ptrace(PTRACE_PEEKUSER,proc->pid,off_fpr0+12+arg_num*2,0);
+ debug(2,"ret = %#lx",ret);
+ return ret;
+ }
if(arg_num <4){
ret=ptrace(PTRACE_PEEKUSER,proc->pid,off_a0+arg_num,0);
debug(2,"ret = %#lx",ret);
return ret;
} else {
- // If we need this, I think we can look at [sp+16] for arg_num==4.
- CP;
- return 0;
+ /* not sure it's going to work for something else than syscall */
+ addr=ptrace(PTRACE_PEEKUSER,proc->pid,off_sp,0);
+ if (addr == -1) {
+ debug(2,"ret = %#lx",addr);
+ return addr;
+ }
+ ret = addr + 4*arg_num;
+ ret=ptrace(PTRACE_PEEKTEXT,proc->pid,addr,0);
+ debug(2,"ret = %#lx",ret);
+ return ret;
}
}
- if(arg_num>=0){
- fprintf(stderr,"args on return?");
- }
- if(type == LT_TOF_FUNCTIONR) {
- return ptrace(PTRACE_PEEKUSER,proc->pid,off_v0,0);
- }
- if (type == LT_TOF_SYSCALLR) {
- unsigned a3=ptrace(PTRACE_PEEKUSER, proc->pid,off_a3,0);
- unsigned v0=ptrace(PTRACE_PEEKUSER, proc->pid,off_v0,0);
- if(!a3){
- return v0;
+ if (type == LT_TOF_FUNCTIONR || type == LT_TOF_SYSCALLR){
+ addr=ptrace(PTRACE_PEEKUSER,proc->pid,off_sp,0);
+ if (addr == -1) {
+ debug(2,"ret = %#lx",addr);
+ return addr;
}
- return -1;
+ ret = addr + 4*arg_num;
+ ret=ptrace(PTRACE_PEEKTEXT,proc->pid,addr,0);
+ debug(2,"ret = %#lx",ret);
+ return ret;
}
fprintf(stderr, "gimme_arg called with wrong arguments\n");
return 0;
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