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| author | Anthony Green <green@redhat.com> | 2009-07-31 11:40:16 +0000 |
|---|---|---|
| committer | Anthony Green <green@redhat.com> | 2009-07-31 11:40:16 +0000 |
| commit | 7a321525ff614c750174eb62b6204e6e7e29311d (patch) | |
| tree | fcb2dcad047322aba6fdc57aaa656076e2d0e30c /sim | |
| parent | 5d8d4872fea6a055fe362bbf176a963ae4c9d12f (diff) | |
| download | gdb-7a321525ff614c750174eb62b6204e6e7e29311d.zip gdb-7a321525ff614c750174eb62b6204e6e7e29311d.tar.gz gdb-7a321525ff614c750174eb62b6204e6e7e29311d.tar.bz2 | |
Increase simulated memory size. Support new system call ABI. Support exception processing for Linux system calls.
Diffstat (limited to 'sim')
| -rw-r--r-- | sim/moxie/ChangeLog | 11 | ||||
| -rw-r--r-- | sim/moxie/interp.c | 37 |
2 files changed, 38 insertions, 10 deletions
diff --git a/sim/moxie/ChangeLog b/sim/moxie/ChangeLog index eacfeb98..f4a1a12 100644 --- a/sim/moxie/ChangeLog +++ b/sim/moxie/ChangeLog @@ -1,3 +1,14 @@ +2009-07-31 Anthony Green <green@moxielogic.com> + + * interp.c: Increase simulated memory to 16MB. + (sim_resume): Tweak swi system calls to support new ABI (up to 5 + args in regs). Also simluate proper exception processing for + Linux system calls. + +2009-07-30 Anthony Green <green@moxielogic.com> + + * interp.c (sim_resume): Add system call software interrupt support. + 2009-06-11 Anthony Green <green@moxielogic.com> * interp.c (INST2OFFSET): Define. diff --git a/sim/moxie/interp.c b/sim/moxie/interp.c index 4980ff1..9627b41 100644 --- a/sim/moxie/interp.c +++ b/sim/moxie/interp.c @@ -132,8 +132,8 @@ static char *myname; static SIM_OPEN_KIND sim_kind; static int issue_messages = 0; -/* Default to a 8 Mbyte (== 2^23) memory space. */ -static int sim_memory_size = 23; +/* Default to a 16 Mbyte (== 2^23) memory space. */ +static int sim_memory_size = 24; #define MEM_SIZE_FLOOR 64 void @@ -997,12 +997,8 @@ sim_resume (sd, step, siggnal) { char *fname = &memory[cpu.asregs.regs[2]]; int mode = (int) convert_target_flags ((unsigned) cpu.asregs.regs[3]); - /* Permission bits are at 0x12($fp) */ - int perm = (int) EXTRACT_WORD(&memory[cpu.asregs.regs[0] + 20]); + int perm = (int) cpu.asregs.regs[4]; int fd = open (fname, mode, perm); -#if 0 - fprintf(stderr, "open(\"%s\", 0x%x, 0x%x) = %d\n", fname, mode, perm, fd); -#endif /* FIXME - set errno */ cpu.asregs.regs[2] = fd; break; @@ -1011,8 +1007,7 @@ sim_resume (sd, step, siggnal) { int fd = cpu.asregs.regs[2]; char *buf = &memory[cpu.asregs.regs[3]]; - /* String length is at 0x12($fp) */ - unsigned len = EXTRACT_WORD(&memory[cpu.asregs.regs[0] + 20]); + unsigned len = (unsigned) cpu.asregs.regs[4]; cpu.asregs.regs[2] = read (fd, buf, len); break; } @@ -1020,11 +1015,33 @@ sim_resume (sd, step, siggnal) { char *str = &memory[cpu.asregs.regs[3]]; /* String length is at 0x12($fp) */ - unsigned count, len = EXTRACT_WORD(&memory[cpu.asregs.regs[0] + 20]); + unsigned count, len = (unsigned) cpu.asregs.regs[4]; count = write (cpu.asregs.regs[2], str, len); cpu.asregs.regs[2] = count; break; } + case 0xffffffff: /* Linux System Call */ + { + unsigned int handler = cpu.asregs.sregs[1]; + unsigned int sp = cpu.asregs.regs[1]; + cpu.asregs.sregs[2] = 3; /* MOXIE_EX_SWI */ + + /* Save a slot for the static chain. */ + sp -= 4; + + /* Push the return address. */ + sp -= 4; + wlat (opc, sp, pc + 6); + + /* Push the current frame pointer. */ + sp -= 4; + wlat (opc, sp, cpu.asregs.regs[0]); + + /* Uncache the stack pointer and set the fp & pc. */ + cpu.asregs.regs[1] = sp; + cpu.asregs.regs[0] = sp; + pc = handler - 6; + } default: break; } |