diff options
Diffstat (limited to 'firmware/2lib/include/2api.h')
| -rw-r--r-- | firmware/2lib/include/2api.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/firmware/2lib/include/2api.h b/firmware/2lib/include/2api.h index 6be8a8d4..d932dbe0 100644 --- a/firmware/2lib/include/2api.h +++ b/firmware/2lib/include/2api.h @@ -28,6 +28,39 @@ #include "2return_codes.h" #include "2secdata_struct.h" +#define _VB2_TRY_IMPL(expr, ctx, recovery_reason, ...) do { \ + vb2_error_t _vb2_try_rv = (expr); \ + struct vb2_context *_vb2_try_ctx = (ctx); \ + uint8_t _vb2_try_reason = (recovery_reason); \ + if (_vb2_try_rv != VB2_SUCCESS) { \ + vb2ex_printf(__func__, \ + "%s returned %#x\n", #expr, _vb2_try_rv); \ + if ((_vb2_try_ctx) && \ + (_vb2_try_reason) != VB2_RECOVERY_NOT_REQUESTED) \ + vb2api_fail(_vb2_try_ctx, _vb2_try_reason, \ + _vb2_try_rv); \ + return _vb2_try_rv; \ + } \ +} while (0) + +/* + * Evaluate an expression and return *from the caller* on failure. + * + * This macro supports two forms of usage: + * 1. VB2_TRY(expr) + * 2. VB2_TRY(expr, ctx, recovery_reason) + * + * When the second form is used, vb2api_fail() will be called on failure before + * return. Note that nvdata only holds one byte for recovery subcode, so any + * other more significant bytes will be truncated. + * + * @param expr An expression (such as a function call) of type + * vb2_error_t. + * @param ctx Vboot context. + * @param recovery_reason Recovery reason passed to vb2api_fail(). + */ +#define VB2_TRY(expr, ...) _VB2_TRY_IMPL(expr, ##__VA_ARGS__, NULL, 0) + /* Modes for vb2ex_tpm_set_mode. */ enum vb2_tpm_mode { /* |