diff options
| author | Daniel Schwierzeck <daniel.schwierzeck@gmail.com> | 2014-11-20 23:55:32 +0100 |
|---|---|---|
| committer | Daniel Schwierzeck <daniel.schwierzeck@gmail.com> | 2014-11-27 16:20:37 +0100 |
| commit | 6d08e22acad9c5890300e7a9e4d077803709339d (patch) | |
| tree | f2f506704a74b7f47c1bf77c9ab9c892697a1213 | |
| parent | 85bafb6da4dddfffa78479aa49a72ae48578a4ce (diff) | |
MIPS: fix setup of initial stack frame
To get correct stack walking and backtrace functionality in gdb,
registers fp and ra should be initialized before calling board_init_f
or board_init_r. Thus allocating stack space and zeroing it as it is
currently done in board.c becomes obsolete.
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
| -rw-r--r-- | arch/mips/cpu/mips32/start.S | 7 | ||||
| -rw-r--r-- | arch/mips/cpu/mips64/start.S | 7 |
2 files changed, 10 insertions, 4 deletions
diff --git a/arch/mips/cpu/mips32/start.S b/arch/mips/cpu/mips32/start.S index 68e59b596f..384ea26022 100644 --- a/arch/mips/cpu/mips32/start.S +++ b/arch/mips/cpu/mips32/start.S @@ -136,10 +136,11 @@ reset: /* Set up temporary stack */ li sp, CONFIG_SYS_SDRAM_BASE + CONFIG_SYS_INIT_SP_OFFSET + move fp, sp la t9, board_init_f jr t9 - nop + move ra, zero /* * void relocate_code (addr_sp, gd, addr_moni) @@ -155,6 +156,7 @@ reset: .ent relocate_code relocate_code: move sp, a0 # set new stack pointer + move fp, sp move s0, a1 # save gd in s0 move s2, a2 # save destination address in s2 @@ -260,8 +262,9 @@ in_ram: addi t1, 4 move a0, s0 # a0 <-- gd + move a1, s2 la t9, board_init_r jr t9 - move a1, s2 + move ra, zero .end relocate_code diff --git a/arch/mips/cpu/mips64/start.S b/arch/mips/cpu/mips64/start.S index 92954e1c90..6ff714e8ed 100644 --- a/arch/mips/cpu/mips64/start.S +++ b/arch/mips/cpu/mips64/start.S @@ -130,10 +130,11 @@ reset: /* Set up temporary stack */ dli sp, CONFIG_SYS_SDRAM_BASE + CONFIG_SYS_INIT_SP_OFFSET + move fp, sp dla t9, board_init_f jr t9 - nop + move ra, zero /* * void relocate_code (addr_sp, gd, addr_moni) @@ -149,6 +150,7 @@ reset: .ent relocate_code relocate_code: move sp, a0 # set new stack pointer + move fp, sp move s0, a1 # save gd in s0 move s2, a2 # save destination address in s2 @@ -254,8 +256,9 @@ in_ram: daddi t1, 8 move a0, s0 # a0 <-- gd + move a1, s2 dla t9, board_init_r jr t9 - move a1, s2 + move ra, zero .end relocate_code |